Going back to snapshots.

This reverts commit f7e490c466.

.circleci/config.yml

@@ -1,38 +0,0 @@
-version: 2
-jobs:
-  build:
-    docker:
-      - image: springcloud/pipeline-base
-    environment:
-      _JAVA_OPTIONS: "-Xms1024m -Xmx2048m"
-      TERM: dumb
-    branches:
-      ignore:
-        - gh-pages # list of branches to ignore
-    steps:
-      - checkout
-      - restore_cache:
-          key: sc-openfeign-{{ .Branch }}
-      - run:
-          name: "Download dependencies"
-          command: ./mvnw -s .settings.xml -U --fail-never dependency:go-offline || true
-      - save_cache:
-          key: sc-openfeign-{{ .Branch }}
-          paths:
-            - ~/.m2
-      - run:
-          name: "Running build"
-          command: ./mvnw -s .settings.xml clean org.jacoco:jacoco-maven-plugin:prepare-agent install -U -P sonar -nsu --batch-mode -Dmaven.test.redirectTestOutputToFile=true -Dorg.slf4j.simpleLogger.log.org.apache.maven.cli.transfer.Slf4jMavenTransferListener=warn
-      - run:
-          name: "Aggregate test results"
-          when: always
-          command: |
-            mkdir -p $CIRCLE_TEST_REPORTS/junit/
-            find . -type f -regex ".*/target/.*-reports/.*" -exec cp {} $CIRCLE_TEST_REPORTS/junit/ \;
-            bash <(curl -s https://codecov.io/bash)
-      - store_artifacts:
-          path: /junit/
-          destination: artifacts
-      - store_test_results:
-          path: /junit/
-          destination: testartifacts

.github/CONTRIBUTING.md

@@ -3,7 +3,7 @@
 
 Spring Cloud is released under the non-restrictive Apache 2.0 license,
 and follows a very standard Github development process, using Github
-tracker for issues and merging pull requests into master. If you want
+tracker for issues and merging pull requests into main. If you want
 to contribute even something trivial please do not hesitate, but
 follow the guidelines below.
 
@@ -17,7 +17,7 @@ given the ability to merge pull requests.
 
 ## Code of Conduct
 This project adheres to the Contributor Covenant [code of
-conduct](https://github.com/spring-cloud/spring-cloud-build/blob/master/docs/src/main/asciidoc/code-of-conduct.adoc). By participating, you  are expected to uphold this code. Please report
+conduct](https://github.com/spring-cloud/spring-cloud-build/blob/main/docs/src/main/asciidoc/code-of-conduct.adoc). By participating, you  are expected to uphold this code. Please report
 unacceptable behavior to spring-code-of-conduct@pivotal.io.
 
 ## Code Conventions and Housekeeping
@@ -27,7 +27,7 @@ added after the original pull request but before a merge.
 * Use the Spring Framework code format conventions. If you use Eclipse
   you can import formatter settings using the
   `eclipse-code-formatter.xml` file from the
-  [Spring Cloud Build](https://raw.githubusercontent.com/spring-cloud/spring-cloud-build/master/spring-cloud-dependencies-parent/eclipse-code-formatter.xml) project. If using IntelliJ, you can use the
+  [Spring Cloud Build](https://raw.githubusercontent.com/spring-cloud/spring-cloud-build/main/spring-cloud-dependencies-parent/eclipse-code-formatter.xml) project. If using IntelliJ, you can use the
   [Eclipse Code Formatter Plugin](https://plugins.jetbrains.com/plugin/6546) to import the same file.
 * Make sure all new `.java` files to have a simple Javadoc class comment with at least an
   `@author` tag identifying you, and preferably at least a paragraph on what the class is
@@ -38,7 +38,7 @@ added after the original pull request but before a merge.
   than cosmetic changes).
 * Add some Javadocs and, if you change the namespace, some XSD doc elements.
 * A few unit tests would help a lot as well -- someone has to do it.
-* If no-one else is using your branch, please rebase it against the current master (or
+* If no-one else is using your branch, please rebase it against the current main (or
   other target branch in the main project).
 * When writing a commit message please follow [these conventions](https://tbaggery.com/2008/04/19/a-note-about-git-commit-messages.html),
   if you are fixing an existing issue please add `Fixes gh-XXXX` at the end of the commit

.github/workflows/maven.yml

@@ -0,0 +1,35 @@
+# This workflow will build a Java project with Maven
+# For more information see: https://help.github.com/actions/language-and-framework-guides/building-and-testing-java-with-maven
+
+name: Build
+
+on:
+  push:
+    branches: [ 2.2.x ]
+  pull_request:
+    branches: [ 2.2.x ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        java: ["8", "11", "16"]
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up JDK 1.8
+        uses: actions/setup-java@v1
+        with:
+          java-version: 1.8
+      - name: Cache local Maven repository
+        uses: actions/cache@v2
+        with:
+          path: ~/.m2/repository
+          key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
+          restore-keys: |
+            ${{ runner.os }}-maven-
+      - name: Build with Maven
+        run: ./mvnw clean install -B -U

README.adoc

@@ -5,9 +5,9 @@ Edit the files in the src/main/asciidoc/ directory instead.
 ////
 
 
-image:https://circleci.com/gh/spring-cloud/spring-cloud-openfeign.svg?style=svg["CircleCI", link="https://circleci.com/gh/spring-cloud/spring-cloud-openfeign"]
+image::https://github.com/spring-cloud/spring-cloud-openfeign/workflows/Build/badge.svg?branch=2.2.x&style=svg["Build",link="https://github.com/spring-cloud/spring-cloud-openfeign/actions"]
 
-image:https://codecov.io/gh/spring-cloud/spring-cloud-openfeign/branch/master/graph/badge.svg["Codecov", link="https://codecov.io/gh/spring-cloud/spring-cloud-openfeign"]
+image:https://codecov.io/gh/spring-cloud/spring-cloud-openfeign/branch/main/graph/badge.svg["Codecov", link="https://codecov.io/gh/spring-cloud/spring-cloud-openfeign"]
 
 image:https://api.codacy.com/project/badge/Grade/97b04c4e609c4b4f86b415e4437a6484["Codacy code quality", link="https://www.codacy.com/app/Spring-Cloud/spring-cloud-openfeign?utm_source=github.com&utm_medium=referral&utm_content=spring-cloud/spring-cloud-openfeign&utm_campaign=Badge_Grade"]
 
@@ -28,6 +28,8 @@ image:https://api.codacy.com/project/badge/Grade/97b04c4e609c4b4f86b415e4437a648
 :project-full-name: Spring Cloud OpenFeign
 :all: {asterisk}{asterisk}
 
+:core_path: {project-root}/spring-cloud-openfeign-core
+
 This project provides OpenFeign integrations for Spring Boot apps through autoconfiguration
 and binding to the Spring Environment and other Spring programming model idioms.
 
@@ -64,23 +66,9 @@ the `.mvn` configuration, so if you find you have to do it to make a
 build succeed, please raise a ticket to get the settings added to
 source control.
 
-For hints on how to build the project look in `.travis.yml` if there
+The projects that require middleware (i.e. Redis) for testing generally
-is one. There should be a "script" and maybe "install" command. Also
+require that a local instance of [Docker](https://www.docker.com/get-started) is installed and running.
-look at the "services" section to see if any services need to be
-running locally (e.g. mongo or rabbit).  Ignore the git-related bits
-that you might find in "before_install" since they're related to setting git
-credentials and you already have those.
 
-The projects that require middleware generally include a
-`docker-compose.yml`, so consider using
-https://docs.docker.com/compose/[Docker Compose] to run the middeware servers
-in Docker containers. See the README in the
-https://github.com/spring-cloud-samples/scripts[scripts demo
-repository] for specific instructions about the common cases of mongo,
-rabbit and redis.
-
-NOTE: If all else fails, build with the command from `.travis.yml` (usually
-`./mvnw install`).
 
 === Documentation
 
@@ -314,3 +302,7 @@ Go to `File` -> `Settings` -> `Other settings` -> `Checkstyle`. There click on t
 - `checkstyle.additional.suppressions.file` - this variable corresponds to suppressions in your local project. E.g. you're working on `spring-cloud-contract`. Then point to the `project-root/src/checkstyle/checkstyle-suppressions.xml` folder. Example for `spring-cloud-contract` would be: `/home/username/spring-cloud-contract/src/checkstyle/checkstyle-suppressions.xml`.
 
 IMPORTANT: Remember to set the `Scan Scope` to `All sources` since we apply checkstyle rules for production and test sources.
+
+== License
+
+The project license file is available https://raw.githubusercontent.com/spring-cloud/spring-cloud-openfeign/main/LICENSE.txt[here].

SECURITY.md

@@ -1,5 +0,0 @@
-# Security Policy
-
-## Reporting a Vulnerability
-
-To report security vulnerabilities, please go to https://pivotal.io/security.

docs/pom.xml

@@ -6,7 +6,7 @@
 	<parent>
 		<groupId>org.springframework.cloud</groupId>
 		<artifactId>spring-cloud-openfeign</artifactId>
-		<version>2.2.5.RELEASE</version>
+		<version>2.2.11.BUILD-SNAPSHOT</version>
 	</parent>
 	<artifactId>spring-cloud-openfeign-docs</artifactId>
 	<packaging>pom</packaging>

docs/src/main/asciidoc/README.adoc

@@ -1,6 +1,6 @@
-image:https://circleci.com/gh/spring-cloud/spring-cloud-openfeign.svg?style=svg["CircleCI", link="https://circleci.com/gh/spring-cloud/spring-cloud-openfeign"]
+image::https://github.com/spring-cloud/spring-cloud-openfeign/workflows/Build/badge.svg?branch=2.2.x&style=svg["Build",link="https://github.com/spring-cloud/spring-cloud-openfeign/actions"]
 
-image:https://codecov.io/gh/spring-cloud/spring-cloud-openfeign/branch/master/graph/badge.svg["Codecov", link="https://codecov.io/gh/spring-cloud/spring-cloud-openfeign"]
+image:https://codecov.io/gh/spring-cloud/spring-cloud-openfeign/branch/main/graph/badge.svg["Codecov", link="https://codecov.io/gh/spring-cloud/spring-cloud-openfeign"]
 
 image:https://api.codacy.com/project/badge/Grade/97b04c4e609c4b4f86b415e4437a6484["Codacy code quality", link="https://www.codacy.com/app/Spring-Cloud/spring-cloud-openfeign?utm_source=github.com&utm_medium=referral&utm_content=spring-cloud/spring-cloud-openfeign&utm_campaign=Badge_Grade"]
 
@@ -14,8 +14,12 @@ include::intro.adoc[]
 
 == Building
 
-include::https://raw.githubusercontent.com/spring-cloud/spring-cloud-build/master/docs/src/main/asciidoc/building-jdk8.adoc[]
+include::https://raw.githubusercontent.com/spring-cloud/spring-cloud-build/main/docs/src/main/asciidoc/building-jdk8.adoc[]
 
 == Contributing
 
-include::https://raw.githubusercontent.com/spring-cloud/spring-cloud-build/master/docs/src/main/asciidoc/contributing.adoc[]
+include::https://raw.githubusercontent.com/spring-cloud/spring-cloud-build/main/docs/src/main/asciidoc/contributing.adoc[]
+
+== License
+
+The project license file is available https://raw.githubusercontent.com/spring-cloud/spring-cloud-openfeign/main/LICENSE.txt[here].

docs/src/main/asciidoc/_attributes.adoc

@@ -14,3 +14,5 @@
 :sc-ext: java
 :project-full-name: Spring Cloud OpenFeign
 :all: {asterisk}{asterisk}
+
+:core_path: {project-root}/spring-cloud-openfeign-core

docs/src/main/asciidoc/_configprops.adoc

@@ -1,24 +1,33 @@
 |===
 |Name | Default | Description
 
+|feign.autoconfiguration.jackson.enabled | `false` | If true, PageJacksonModule and SortJacksonModule bean will be provided for Jackson page decoding.
+|feign.circuitbreaker.enabled | `false` | If true, an OpenFeign client will be wrapped with a Spring Cloud CircuitBreaker circuit breaker.
 |feign.client.config |  | 
-|feign.client.default-config | default | 
+|feign.client.decode-slash | `true` | Feign clients do not encode slash `/` characters by default. To change this behavior, set the `decodeSlash` to `false`.
-|feign.client.default-to-properties | true | 
+|feign.client.default-config | `default` | 
-|feign.compression.request.enabled | false | Enables the request sent by Feign to be compressed.
+|feign.client.default-to-properties | `true` | 
-|feign.compression.request.mime-types | [text/xml, application/xml, application/json] | The list of supported mime types.
+|feign.compression.request.enabled | `false` | Enables the request sent by Feign to be compressed.
-|feign.compression.request.min-request-size | 2048 | The minimum threshold content size.
+|feign.compression.request.mime-types | `[text/xml, application/xml, application/json]` | The list of supported mime types.
-|feign.compression.response.enabled | false | Enables the response from Feign to be compressed.
+|feign.compression.request.min-request-size | `2048` | The minimum threshold content size.
-|feign.compression.response.useGzipDecoder | false | Enables the default gzip decoder to be used.
+|feign.compression.response.enabled | `false` | Enables the response from Feign to be compressed.
-|feign.httpclient.connection-timeout | 2000 | 
+|feign.compression.response.useGzipDecoder | `false` | Enables the default gzip decoder to be used.
-|feign.httpclient.connection-timer-repeat | 3000 | 
+|feign.encoder.charset-from-content-type | `false` | Indicates whether the charset should be derived from the {@code Content-Type} header.
-|feign.httpclient.disable-ssl-validation | false | 
+|feign.httpclient.connection-timeout | `2000` | 
-|feign.httpclient.enabled | true | Enables the use of the Apache HTTP Client by Feign.
+|feign.httpclient.connection-timer-repeat | `3000` | 
-|feign.httpclient.follow-redirects | true | 
+|feign.httpclient.disable-ssl-validation | `false` | 
-|feign.httpclient.max-connections | 200 | 
+|feign.httpclient.enabled | `true` | Enables the use of the Apache HTTP Client by Feign.
-|feign.httpclient.max-connections-per-route | 50 | 
+|feign.httpclient.follow-redirects | `true` | 
-|feign.httpclient.time-to-live | 900 | 
+|feign.httpclient.hc5.enabled | `false` | Enables the use of the Apache HTTP Client 5 by Feign.
+|feign.httpclient.hc5.pool-concurrency-policy |  | Pool concurrency policies.
+|feign.httpclient.hc5.pool-reuse-policy |  | Pool connection re-use policies.
+|feign.httpclient.hc5.socket-timeout | `5` | Default value for socket timeout.
+|feign.httpclient.hc5.socket-timeout-unit |  | Default value for socket timeout unit.
+|feign.httpclient.max-connections | `200` | 
+|feign.httpclient.max-connections-per-route | `50` | 
+|feign.httpclient.time-to-live | `900` | 
 |feign.httpclient.time-to-live-unit |  | 
-|feign.hystrix.enabled | false | If true, an OpenFeign client will be wrapped with a Hystrix circuit breaker.
+|feign.hystrix.enabled | `false` | If true, an OpenFeign client will be wrapped with a Hystrix circuit breaker.
-|feign.okhttp.enabled | false | Enables the use of the OK HTTP Client by Feign.
+|feign.okhttp.enabled | `false` | Enables the use of the OK HTTP Client by Feign.
 
 |===

docs/src/main/asciidoc/ghpages.sh

@@ -39,7 +39,7 @@ function check_if_anything_to_sync() {
 }
 
 function retrieve_current_branch() {
-    # Code getting the name of the current branch. For master we want to publish as we did until now
+    # Code getting the name of the current branch. For main we want to publish as we did until now
     # https://stackoverflow.com/questions/1593051/how-to-programmatically-determine-the-current-checked-out-git-branch
     # If there is a branch already passed will reuse it - otherwise will try to find it
     CURRENT_BRANCH=${BRANCH}
@@ -134,8 +134,8 @@ function add_docs_from_target() {
 
 # Copies the docs by using the retrieved properties from Maven build
 function copy_docs_for_current_version() {
-    if [[ "${CURRENT_BRANCH}" == "master" ]] ; then
+    if [[ "${CURRENT_BRANCH}" == "main" ]] ; then
-        echo -e "Current branch is master - will copy the current docs only to the root folder"
+        echo -e "Current branch is main - will copy the current docs only to the root folder"
         for f in docs/target/generated-docs/*; do
             file=${f#docs/target/generated-docs/*}
             if ! git ls-files -i -o --exclude-standard --directory | grep -q ^$file$; then
@@ -216,7 +216,7 @@ function commit_changes_if_applicable() {
         git commit -a -m "Sync docs from ${CURRENT_BRANCH} to gh-pages" && COMMIT_SUCCESSFUL="yes" || echo "Failed to commit changes"
 
         # Uncomment the following push if you want to auto push to
-        # the gh-pages branch whenever you commit to master locally.
+        # the gh-pages branch whenever you commit to main locally.
         # This is a little extreme. Use with care!
         ###################################################################
         if [[ "${COMMIT_SUCCESSFUL}" == "yes" ]] ; then
@@ -249,7 +249,7 @@ The idea of this script is to update gh-pages branch with the generated docs. Wi
 the script will work in the following manner:
 
 - if there's no gh-pages / target for docs module then the script ends
-- for master branch the generated docs are copied to the root of gh-pages branch
+- for main branch the generated docs are copied to the root of gh-pages branch
 - for any other branch (if that branch is whitelisted) a subfolder with branch name is created
     and docs are copied there
 - if the version switch is passed (-v) then a tag with (v) prefix will be retrieved and a folder
@@ -327,4 +327,4 @@ build_docs_if_applicable
 retrieve_doc_properties
 stash_changes
 add_docs_from_target
-checkout_previous_branch
+checkout_previous_branch

docs/src/main/asciidoc/sagan-index.adoc

@@ -24,3 +24,18 @@ public class WebApplication {
 }
 
 ```
+
+## Contributing
+
+We welcome contributions. You can read more on how to contribute to the project https://github.com/spring-cloud/spring-cloud-openfeign/blob/main/README.adoc#3-contributing[here].
+
+## Community Support
+
+* You can report issues through https://github.com/spring-cloud/spring-cloud-openfeign/issues[Github].
+* We monitor https://stackoverflow.com/[StackOverflow] for questions with the `spring-cloud-feign` tag.
+* You can contact our team at https://gitter.im/spring-cloud/spring-cloud[Gitter].
+
+## Commercial Support
+
+Commercial Support is provided as part of the https://spring.io/support[VMware Spring Runtime] offering.
+

docs/src/main/asciidoc/spring-cloud-openfeign.adoc

@@ -15,7 +15,7 @@ To use Feign create an interface and annotate it.
 It has pluggable annotation support including Feign annotations and JAX-RS annotations.
 Feign also supports pluggable encoders and decoders.
 Spring Cloud adds support for Spring MVC annotations and for using the same `HttpMessageConverters` used by default in Spring Web.
-Spring Cloud integrates Ribbon and Eureka, as well as Spring Cloud LoadBalancer to provide a load-balanced http client when using Feign.
+Spring Cloud integrates Ribbon and Eureka, Spring Cloud CircuitBreaker, as well as Spring Cloud LoadBalancer to provide a load-balanced http client when using Feign.
 
 [[netflix-feign-starter]]
 === How to Include Feign
@@ -55,11 +55,11 @@ public interface StoreClient {
 }
 ----
 
-In the `@FeignClient` annotation the String value ("stores" above) is an arbitrary client name, which is used to create either a https://github.com/Netflix/ribbon[Ribbon] load-balancer (see <<spring-cloud-ribbon,below for details of Ribbon support>>) or https://github.com/spring-cloud/spring-cloud-commons/blob/master/spring-cloud-commons/src/main/java/org/springframework/cloud/client/loadbalancer/reactive/ReactiveLoadBalancer.java[Spring Cloud LoadBalancer].
+In the `@FeignClient` annotation the String value ("stores" above) is an arbitrary client name, which is used to create either a https://github.com/Netflix/ribbon[Ribbon] load-balancer (see <<spring-cloud-ribbon,below for details of Ribbon support>> and <<spring-cloud-circuitbreaker,below for details of Spring Cloud CircuitBreaker support>>) or https://github.com/spring-cloud/spring-cloud-commons/blob/main/spring-cloud-commons/src/main/java/org/springframework/cloud/client/loadbalancer/reactive/ReactiveLoadBalancer.java[Spring Cloud LoadBalancer].
 You can also specify a URL using the `url` attribute
 (absolute value or just a hostname). The name of the bean in the
 application context is the fully qualified name of the interface.
-To specify your own alias value you can use the `qualifier` value
+To specify your own alias value you can use the `qualifiers` value
 of the `@FeignClient` annotation.
 
 The load-balancer client above will want to discover the physical addresses
@@ -119,13 +119,14 @@ Spring Cloud OpenFeign provides the following beans by default for feign (`BeanT
 * `Logger` feignLogger: `Slf4jLogger`
 * `Contract` feignContract: `SpringMvcContract`
 * `Feign.Builder` feignBuilder: `HystrixFeign.Builder`
+* `Feign.Builder` feignBuilder: `FeignCircuitBreaker.Builder`
 * `Client` feignClient: if Ribbon is in the classpath and is enabled it is a `LoadBalancerFeignClient`, otherwise if Spring Cloud LoadBalancer is in the classpath, `FeignBlockingLoadBalancerClient` is used.
 If none of them is in the classpath, the default feign client is used.
 
 NOTE: `spring-cloud-starter-openfeign` supports both `spring-cloud-starter-netflix-ribbon` and `spring-cloud-starter-loadbalancer`. However, as they are optional dependencies, you need to make sure the one you want to use has been added to your project.
 
-The OkHttpClient and ApacheHttpClient feign clients can be used by setting `feign.okhttp.enabled` or `feign.httpclient.enabled` to `true`, respectively, and having them on the classpath.
+The OkHttpClient and ApacheHttpClient and ApacheHC5 feign clients can be used by setting `feign.okhttp.enabled` or `feign.httpclient.enabled` or `feign.httpclient.hc5.enabled` to `true`, respectively, and having them on the classpath.
-You can customize the HTTP client used by providing a bean of either `org.apache.http.impl.client.CloseableHttpClient` when using Apache or `okhttp3.OkHttpClient` when using OK HTTP.
+You can customize the HTTP client used by providing a bean of either `org.apache.http.impl.client.CloseableHttpClient` when using Apache or `okhttp3.OkHttpClient` when using OK HTTP or `org.apache.hc.client5.http.impl.classic.CloseableHttpClient` when using Apache HC5.
 
 Spring Cloud OpenFeign _does not_ provide the following beans by default for feign, but still looks up beans of these types from the application context to create the feign client:
 
@@ -175,6 +176,10 @@ feign:
         loggerLevel: full
         errorDecoder: com.example.SimpleErrorDecoder
         retryer: com.example.SimpleRetryer
+       defaultQueryParameters:
+          query: queryValue
+        defaultRequestHeaders:
+          header: headerValue
         requestInterceptors:
           - com.example.FooRequestInterceptor
           - com.example.BarRequestInterceptor
@@ -188,6 +193,8 @@ Default configurations can be specified in the `@EnableFeignClients` attribute `
 
 If you prefer using configuration properties to configured all `@FeignClient`, you can create configuration properties with `default` feign name.
 
+You can use `feign.client.config.feignName.defaultQueryParameters` and `feign.client.config.feignName.defaultRequestHeaders` to specify query parameters and headers that will be sent with every request of the client named `feignName`.
+
 application.yml
 [source,yaml]
 ----
@@ -268,6 +275,50 @@ public FeignClientConfigurer feignClientConfigurer() {
 }
 ----
 
+TIP: By default, Feign clients do not encode slash `/` characters. You can change this behaviour, by setting the value of `feign.client.decodeSlash` to `false`.
+
+==== `SpringEncoder` configuration
+
+In the `SpringEncoder` that we provide, we set `null` charset for binary content types and `UTF-8` for all the other ones.
+
+You can modify this behaviour to derive the charset from the `Content-Type` header charset instead by setting the value of `feign.encoder.charset-from-content-type` to `true`.
+
+[[timeout-handling]]
+=== Timeout Handling
+
+We can configure timeouts on both the default and the named client. OpenFeign works with two timeout parameters:
+
+- `connectTimeout` prevents blocking the caller due to the long server processing time.
+- `readTimeout` is applied from the time of connection establishment and is triggered when returning the response takes too long.
+
+NOTE: In case the server is not running or available a packet results in _connection refused_. The communication ends either with an error message or in a fallback. This can happen _before_ the `connectTimeout` if it is set very low. The time taken to perform a lookup and to receive such a packet causes a significant part of this delay. It is subject to change based on the remote host that involves a DNS lookup.
+
+When Hystrix <<spring-cloud-openfeign#spring-cloud-feign-hystrix,is enabled>>, its timeout configuration link:https://github.com/Netflix/Hystrix/wiki/Configuration#execution.isolation.thread.timeoutInMilliseconds[defaults] to 1000 milliseconds. Hence, it might occur before the client timeout that we configured earlier. Increasing this timeout prevents it from happening.
+
+[source,yaml]
+----
+feign:
+  client:
+    config:
+      default:
+        connectTimeout: 5000
+        readTimeout: 5000
+  hystrix:
+    enabled: true
+
+hystrix:
+  command:
+    default:
+      execution:
+        timeout:
+          enabled: true
+        isolation:
+          thread:
+            timeoutInMilliseconds: 60000
+----
+
+NOTE: When the Hystrix timeout is enabled and its timeout is set longer than that of a feign client, `HystrixTimeoutException` wraps a feign exception. Otherwise, the only difference is the cause of the exception. The purpose of `HystrixTimeoutException` is to wrap any runtime exception that occurs first and throw an instance of itself.
+
 === Creating Feign Clients Manually
 
 In some cases it might be necessary to customize your Feign Clients in a way that is not
@@ -342,7 +393,7 @@ favor for an opt-in approach.
 [[spring-cloud-feign-hystrix-fallback]]
 === Feign Hystrix Fallbacks
 
-Hystrix supports the notion of a fallback: a default code path that is executed when they circuit is open or there is an error. To enable fallbacks for a given `@FeignClient` set the `fallback` attribute to the class name that implements the fallback. You also need to declare your implementation as a Spring bean.
+Hystrix supports the notion of a fallback: a default code path that is executed when the circuit is open or there is an error. To enable fallbacks for a given `@FeignClient` set the `fallback` attribute to the class name that implements the fallback. You also need to declare your implementation as a Spring bean.
 
 [source,java,indent=0]
 ----
@@ -386,6 +437,44 @@ static class HystrixClientFallbackFactory implements FallbackFactory<HystrixClie
 
 WARNING: There is a limitation with the implementation of fallbacks in Feign and how Hystrix fallbacks work. Fallbacks are currently not supported for methods that return `com.netflix.hystrix.HystrixCommand` and `rx.Observable`.
 
+[[spring-cloud-feign-circuitbreaker]]
+=== Feign Spring Cloud CircuitBreaker Support
+
+If Spring Cloud CircuitBreaker is on the classpath and `feign.circuitbreaker.enabled=true`, Feign will wrap all methods with a circuit breaker.
+
+To disable Spring Cloud CircuitBreaker support on a per-client basis create a vanilla `Feign.Builder` with the "prototype" scope, e.g.:
+
+[source,java,indent=0]
+----
+@Configuration
+public class FooConfiguration {
+    	@Bean
+	@Scope("prototype")
+	public Feign.Builder feignBuilder() {
+		return Feign.builder();
+	}
+}
+----
+
+The circuit breaker name follows this pattern `<feignClientName>#<calledMethod>`. When calling a `@FeignClient` with name `foo` and the called interface method is `bar` then the circuit breaker name will be `foo_bar`.
+
+[[spring-cloud-feign-circuitbreaker-fallback]]
+=== Feign Spring Cloud CircuitBreaker Fallbacks
+
+Spring Cloud CircuitBreaker supports the notion of a fallback: a default code path that is executed when the circuit is open or there is an error. To enable fallbacks for a given `@FeignClient` set the `fallback` attribute to the class name that implements the fallback. You also need to declare your implementation as a Spring bean.
+
+[source,java,indent=0]
+----
+include::{core_path}/src/test/java/org/springframework/cloud/openfeign/circuitbreaker/CircuitBreakerTests.java[tags=client_with_fallback, indent=0]
+----
+
+If one needs access to the cause that made the fallback trigger, one can use the `fallbackFactory` attribute inside `@FeignClient`.
+
+[source,java,indent=0]
+----
+include::{core_path}/src/test/java/org/springframework/cloud/openfeign/circuitbreaker/CircuitBreakerTests.java[tags=client_with_fallback_factory, indent=0]
+----
+
 === Feign and `@Primary`
 
 When using Feign with Hystrix fallbacks, there are multiple beans in the `ApplicationContext` of the same type. This will cause `@Autowired` to not work because there isn't exactly one bean, or one marked as primary. To work around this, Spring Cloud OpenFeign marks all Feign instances as `@Primary`, so Spring Framework will know which bean to inject. In some cases, this may not be desirable. To turn off this behavior set the `primary` attribute of `@FeignClient` to false.
@@ -434,10 +523,7 @@ public interface UserClient extends UserService {
 }
 ----
 
-NOTE: It is generally not advisable to share an interface between a
+WARNING: `@FeignClient` interfaces should not be shared between server and client and annotating `@FeignClient` interfaces with `@RequestMapping` on class level is no longer supported.
-server and a client. It introduces tight coupling, and also actually
-doesn't work with Spring MVC in its current form (method parameter
-mapping is not inherited).
 
 === Feign request/response compression
 
@@ -565,7 +651,7 @@ If a map is passed as the method argument, the `@MatrixVariable` path segment is
 If a different object is passed, either the `name` provided in the `@MatrixVariable` annotation (if defined) or the annotated variable name is
 joined with the provided method argument using `=`.
 
-IMPORTANT:: Even though, on the server side, Spring does not require the users to name the path segment placeholder same as the matrix variable name, since it would be too ambiguous on the client side, Sprig Cloud OpenFeign requires that you add a path segment placeholder with a name matching either the `name` provided in the `@MatrixVariable` annotation (if defined) or the annotated variable name.
+IMPORTANT:: Even though, on the server side, Spring does not require the users to name the path segment placeholder same as the matrix variable name, since it would be too ambiguous on the client side, Spring Cloud OpenFeign requires that you add a path segment placeholder with a name matching either the `name` provided in the `@MatrixVariable` annotation (if defined) or the annotated variable name.
 
 For example:
 
@@ -621,6 +707,14 @@ To work around this problem you can use an `ObjectProvider` when autowiring your
 ObjectProvider<TestFeginClient> testFeginClient;
 ----
 
+=== Spring Data Support
+You may consider enabling Jackson Modules for the support `org.springframework.data.domain.Page` and `org.springframework.data.domain.Sort` decoding.
+
+[source,java]
+----
+feign.autoconfiguration.jackson.enabled=true
+----
+
 == Configuration properties
 
-To see the list of all Sleuth related configuration properties please check link:appendix.html[the Appendix page].
+To see the list of all Spring Cloud OpenFeign related configuration properties please check link:appendix.html[the Appendix page].

pom.xml

@@ -4,14 +4,14 @@
 		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
 	<modelVersion>4.0.0</modelVersion>
 	<artifactId>spring-cloud-openfeign</artifactId>
-	<version>2.2.5.RELEASE</version>
+	<version>2.2.11.BUILD-SNAPSHOT</version>
 	<packaging>pom</packaging>
 	<name>Spring Cloud OpenFeign</name>
 	<description>Spring Cloud OpenFeign</description>
 	<parent>
 		<groupId>org.springframework.cloud</groupId>
 		<artifactId>spring-cloud-build</artifactId>
-		<version>2.3.1.RELEASE</version>
+		<version>2.3.6.BUILD-SNAPSHOT</version>
 		<relativePath/>
 	</parent>
 	<scm>
@@ -25,12 +25,11 @@
 	</scm>
 	<properties>
 		<main.basedir>${basedir}</main.basedir>
-		<jackson.version>2.7.3</jackson.version>
+		<jackson.version>2.11.3</jackson.version>
-		<spring-cloud-commons.version>2.2.5.RELEASE</spring-cloud-commons.version>
+		<spring-cloud-commons.version>2.2.9.RELEASE</spring-cloud-commons.version>
-		<spring-cloud-netflix.version>2.2.5.RELEASE</spring-cloud-netflix.version>
+		<spring-cloud-netflix.version>2.2.9.RELEASE</spring-cloud-netflix.version>
 
 		<!-- Plugin versions -->
-		<maven-compiler-plugin.version>3.6.1</maven-compiler-plugin.version>
 		<maven-eclipse-plugin.version>2.10</maven-eclipse-plugin.version>
 		<!-- Sonar -->
 		<surefire.plugin.version>2.19.1</surefire.plugin.version>
@@ -68,7 +67,6 @@
 			</plugin>
 			<plugin>
 				<artifactId>maven-compiler-plugin</artifactId>
-				<version>${maven-compiler-plugin.version}</version>
 				<configuration>
 					<source>1.8</source>
 					<target>1.8</target>

spring-cloud-openfeign-core/pom.xml

@@ -6,7 +6,7 @@
 	<parent>
 		<groupId>org.springframework.cloud</groupId>
 		<artifactId>spring-cloud-openfeign</artifactId>
-		<version>2.2.5.RELEASE</version>
+		<version>2.2.11.BUILD-SNAPSHOT</version>
 		<relativePath>..</relativePath> <!-- lookup parent from repository -->
 	</parent>
 	<artifactId>spring-cloud-openfeign-core</artifactId>
@@ -108,6 +108,11 @@
 			<artifactId>feign-slf4j</artifactId>
 			<optional>true</optional>
 		</dependency>
+		<dependency>
+			<groupId>io.github.openfeign</groupId>
+			<artifactId>feign-hc5</artifactId>
+			<optional>true</optional>
+		</dependency>
 		<dependency>
 			<groupId>io.github.openfeign</groupId>
 			<artifactId>feign-httpclient</artifactId>
@@ -217,13 +222,13 @@
 		<dependency>
 			<groupId>com.google.protobuf</groupId>
 			<artifactId>protobuf-java</artifactId>
-			<version>3.4.0</version>
+			<version>3.14.0</version>
 			<scope>test</scope>
 		</dependency>
 		<dependency>
 			<groupId>io.vavr</groupId>
 			<artifactId>vavr</artifactId>
-			<version>0.10.0</version>
+			<version>0.10.3</version>
 			<scope>test</scope>
 		</dependency>
 		<dependency>

spring-cloud-openfeign-core/src/main/java/org/springframework/cloud/openfeign/FallbackFactory.java

@@ -0,0 +1,87 @@
+/*
+ * Copyright 2013-2020 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.cloud.openfeign;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+
+import static feign.Util.checkNotNull;
+
+/**
+ * Used to control the fallback given its cause.
+ *
+ * Ex.
+ *
+ * <pre>
+ * {@code
+ * // This instance will be invoked if there are errors of any kind.
+ * FallbackFactory<GitHub> fallbackFactory = cause -> (owner, repo) -> {
+ *   if (cause instanceof FeignException && ((FeignException) cause).status() == 403) {
+ *     return Collections.emptyList();
+ *   } else {
+ *     return Arrays.asList("yogi");
+ *   }
+ * };
+ *
+ * GitHub github = FeignCircuitBreaker.builder()
+ *                             ...
+ *                             .target(GitHub.class, "https://api.github.com", fallbackFactory);
+ * }
+ * </pre>
+ *
+ * @param <T> the feign interface type
+ */
+public interface FallbackFactory<T> {
+
+	/**
+	 * Returns an instance of the fallback appropriate for the given cause.
+	 * @param cause cause of an exception.
+	 * @return fallback
+	 */
+	T create(Throwable cause);
+
+	final class Default<T> implements FallbackFactory<T> {
+
+		final Log logger;
+
+		final T constant;
+
+		public Default(T constant) {
+			this(constant, LogFactory.getLog(Default.class));
+		}
+
+		Default(T constant, Log logger) {
+			this.constant = checkNotNull(constant, "fallback");
+			this.logger = checkNotNull(logger, "logger");
+		}
+
+		@Override
+		public T create(Throwable cause) {
+			if (logger.isTraceEnabled()) {
+				logger.trace("fallback due to: " + cause.getMessage(), cause);
+			}
+			return constant;
+		}
+
+		@Override
+		public String toString() {
+			return constant.toString();
+		}
+
+	}
+
+}

spring-cloud-openfeign-core/src/main/java/org/springframework/cloud/openfeign/FeignAutoConfiguration.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,6 +16,7 @@
 
 package org.springframework.cloud.openfeign;
 
+import java.io.IOException;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Timer;
@@ -24,11 +25,15 @@ import java.util.concurrent.TimeUnit;
 
 import javax.annotation.PreDestroy;
 
+import com.fasterxml.jackson.databind.Module;
 import feign.Client;
 import feign.Feign;
+import feign.hc5.ApacheHttp5Client;
 import feign.httpclient.ApacheHttpClient;
 import feign.okhttp.OkHttpClient;
 import okhttp3.ConnectionPool;
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
 import org.apache.http.client.HttpClient;
 import org.apache.http.client.config.RequestConfig;
 import org.apache.http.config.RegistryBuilder;
@@ -36,33 +41,50 @@ import org.apache.http.conn.HttpClientConnectionManager;
 import org.apache.http.impl.client.CloseableHttpClient;
 
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.autoconfigure.condition.AllNestedConditions;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingClass;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
 import org.springframework.cloud.client.actuator.HasFeatures;
+import org.springframework.cloud.client.circuitbreaker.CircuitBreaker;
+import org.springframework.cloud.client.circuitbreaker.CircuitBreakerFactory;
 import org.springframework.cloud.commons.httpclient.ApacheHttpClientConnectionManagerFactory;
 import org.springframework.cloud.commons.httpclient.ApacheHttpClientFactory;
 import org.springframework.cloud.commons.httpclient.OkHttpClientConnectionPoolFactory;
 import org.springframework.cloud.commons.httpclient.OkHttpClientFactory;
 import org.springframework.cloud.openfeign.support.DefaultGzipDecoderConfiguration;
+import org.springframework.cloud.openfeign.support.FeignEncoderProperties;
 import org.springframework.cloud.openfeign.support.FeignHttpClientProperties;
+import org.springframework.cloud.openfeign.support.PageJacksonModule;
+import org.springframework.cloud.openfeign.support.SortJacksonModule;
 import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Conditional;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.Import;
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.Sort;
 
 /**
  * @author Spencer Gibb
  * @author Julien Roy
+ * @author Grzegorz Poznachowski
+ * @author Nikita Konev
+ * @author Tim Peeters
+ * @author Olga Maciaszek-Sharma
+ * @author Nguyen Ky Thanh
  */
 @Configuration(proxyBeanMethods = false)
 @ConditionalOnClass(Feign.class)
 @EnableConfigurationProperties({ FeignClientProperties.class,
-		FeignHttpClientProperties.class })
+		FeignHttpClientProperties.class, FeignEncoderProperties.class })
 @Import(DefaultGzipDecoderConfiguration.class)
 public class FeignAutoConfiguration {
 
+	private static final Log LOG = LogFactory.getLog(FeignAutoConfiguration.class);
+
 	@Autowired(required = false)
 	private List<FeignClientSpecification> configurations = new ArrayList<>();
 
@@ -79,7 +101,42 @@ public class FeignAutoConfiguration {
 	}
 
 	@Configuration(proxyBeanMethods = false)
+	@ConditionalOnClass({ Module.class, Page.class, Sort.class })
+	@ConditionalOnProperty(value = "feign.autoconfiguration.jackson.enabled",
+			havingValue = "true")
+	protected static class FeignJacksonConfiguration {
+
+		@Bean
+		@ConditionalOnMissingBean(PageJacksonModule.class)
+		public PageJacksonModule pageJacksonModule() {
+			return new PageJacksonModule();
+		}
+
+		@Bean
+		@ConditionalOnMissingBean(SortJacksonModule.class)
+		public SortJacksonModule sortModule() {
+			return new SortJacksonModule();
+		}
+
+	}
+
+	@Configuration(proxyBeanMethods = false)
+	@Conditional(DefaultFeignTargeterConditions.class)
+	protected static class DefaultFeignTargeterConfiguration {
+
+		@Bean
+		@ConditionalOnMissingBean
+		public Targeter feignTargeter() {
+			return new DefaultTargeter();
+		}
+
+	}
+
+	@Configuration(proxyBeanMethods = false)
+	@Conditional(FeignCircuitBreakerDisabledConditions.class)
 	@ConditionalOnClass(name = "feign.hystrix.HystrixFeign")
+	@ConditionalOnProperty(value = "feign.hystrix.enabled", havingValue = "true",
+			matchIfMissing = true)
 	protected static class HystrixFeignTargeterConfiguration {
 
 		@Bean
@@ -91,13 +148,16 @@ public class FeignAutoConfiguration {
 	}
 
 	@Configuration(proxyBeanMethods = false)
-	@ConditionalOnMissingClass("feign.hystrix.HystrixFeign")
+	@ConditionalOnClass(CircuitBreaker.class)
-	protected static class DefaultFeignTargeterConfiguration {
+	@ConditionalOnProperty(value = "feign.circuitbreaker.enabled", havingValue = "true")
+	protected static class CircuitBreakerPresentFeignTargeterConfiguration {
 
 		@Bean
 		@ConditionalOnMissingBean
-		public Targeter feignTargeter() {
+		@ConditionalOnBean(CircuitBreakerFactory.class)
-			return new DefaultTargeter();
+		public Targeter circuitBreakerFeignTargeter(
+				CircuitBreakerFactory circuitBreakerFactory) {
+			return new FeignCircuitBreakerTargeter(circuitBreakerFactory);
 		}
 
 	}
@@ -111,6 +171,7 @@ public class FeignAutoConfiguration {
 	@ConditionalOnMissingClass("com.netflix.loadbalancer.ILoadBalancer")
 	@ConditionalOnMissingBean(CloseableHttpClient.class)
 	@ConditionalOnProperty(value = "feign.httpclient.enabled", matchIfMissing = true)
+	@Conditional(HttpClient5DisabledConditions.class)
 	protected static class HttpClientFeignConfiguration {
 
 		private final Timer connectionManagerTimer = new Timer(
@@ -163,10 +224,17 @@ public class FeignAutoConfiguration {
 		}
 
 		@PreDestroy
-		public void destroy() throws Exception {
+		public void destroy() {
 			this.connectionManagerTimer.cancel();
 			if (this.httpClient != null) {
-				this.httpClient.close();
+				try {
+					this.httpClient.close();
+				}
+				catch (IOException e) {
+					if (LOG.isErrorEnabled()) {
+						LOG.error("Could not correctly close httpClient.");
+					}
+				}
 			}
 		}
 
@@ -222,4 +290,39 @@ public class FeignAutoConfiguration {
 
 	}
 
+	@Configuration(proxyBeanMethods = false)
+	@ConditionalOnClass(ApacheHttp5Client.class)
+	@ConditionalOnMissingClass("com.netflix.loadbalancer.ILoadBalancer")
+	@ConditionalOnMissingBean(org.apache.hc.client5.http.impl.classic.CloseableHttpClient.class)
+	@ConditionalOnProperty(value = "feign.httpclient.hc5.enabled", havingValue = "true")
+	@Import(org.springframework.cloud.openfeign.clientconfig.HttpClient5FeignConfiguration.class)
+	protected static class HttpClient5FeignConfiguration {
+
+		@Bean
+		@ConditionalOnMissingBean(Client.class)
+		public Client feignClient(
+				org.apache.hc.client5.http.impl.classic.CloseableHttpClient httpClient5) {
+			return new ApacheHttp5Client(httpClient5);
+		}
+
+	}
+
+	static class DefaultFeignTargeterConditions extends AllNestedConditions {
+
+		DefaultFeignTargeterConditions() {
+			super(ConfigurationPhase.PARSE_CONFIGURATION);
+		}
+
+		@Conditional(FeignCircuitBreakerDisabledConditions.class)
+		static class FeignCircuitBreakerDisabled {
+
+		}
+
+		@Conditional(HystrixDisabledConditions.class)
+		static class HystrixDisabled {
+
+		}
+
+	}
+
 }

spring-cloud-openfeign-core/src/main/java/org/springframework/cloud/openfeign/FeignBuilderCustomizer.java

@@ -0,0 +1,31 @@
+/*
+ * Copyright 2013-2019 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.cloud.openfeign;
+
+import feign.Feign;
+
+/**
+ * Allows application to customize the Feign builder.
+ *
+ * @author Matt King
+ */
+@FunctionalInterface
+public interface FeignBuilderCustomizer {
+
+	void customize(Feign.Builder builder);
+
+}

spring-cloud-openfeign-core/src/main/java/org/springframework/cloud/openfeign/FeignCircuitBreaker.java

@@ -0,0 +1,89 @@
+/*
+ * Copyright 2013-2020 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.cloud.openfeign;
+
+import feign.Feign;
+import feign.Target;
+
+import org.springframework.cloud.client.circuitbreaker.CircuitBreaker;
+import org.springframework.cloud.client.circuitbreaker.CircuitBreakerFactory;
+
+/**
+ * Allows Feign interfaces to work with {@link CircuitBreaker}.
+ *
+ * @author Marcin Grzejszczak
+ * @since 3.0.0
+ */
+public final class FeignCircuitBreaker {
+
+	private FeignCircuitBreaker() {
+		throw new IllegalStateException("Don't instantiate a utility class");
+	}
+
+	/**
+	 * @return builder for Feign CircuitBreaker integration
+	 */
+	public static Builder builder() {
+		return new Builder();
+	}
+
+	/**
+	 * Builder for Feign CircuitBreaker integration.
+	 */
+	public static final class Builder extends Feign.Builder {
+
+		private CircuitBreakerFactory circuitBreakerFactory;
+
+		private String feignClientName;
+
+		Builder circuitBreakerFactory(CircuitBreakerFactory circuitBreakerFactory) {
+			this.circuitBreakerFactory = circuitBreakerFactory;
+			return this;
+		}
+
+		Builder feignClientName(String feignClientName) {
+			this.feignClientName = feignClientName;
+			return this;
+		}
+
+		public <T> T target(Target<T> target, T fallback) {
+			return build(
+					fallback != null ? new FallbackFactory.Default<T>(fallback) : null)
+							.newInstance(target);
+		}
+
+		public <T> T target(Target<T> target,
+				FallbackFactory<? extends T> fallbackFactory) {
+			return build(fallbackFactory).newInstance(target);
+		}
+
+		@Override
+		public <T> T target(Target<T> target) {
+			return build(null).newInstance(target);
+		}
+
+		public Feign build(final FallbackFactory<?> nullableFallbackFactory) {
+			super.invocationHandlerFactory(
+					(target, dispatch) -> new FeignCircuitBreakerInvocationHandler(
+							circuitBreakerFactory, target, dispatch,
+							nullableFallbackFactory));
+			return super.build();
+		}
+
+	}
+
+}

spring-cloud-openfeign-core/src/main/java/org/springframework/cloud/openfeign/FeignCircuitBreakerDisabledConditions.java

@@ -0,0 +1,40 @@
+/*
+ * Copyright 2013-2020 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.cloud.openfeign;
+
+import org.springframework.boot.autoconfigure.condition.AnyNestedCondition;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingClass;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
+
+class FeignCircuitBreakerDisabledConditions extends AnyNestedCondition {
+
+	FeignCircuitBreakerDisabledConditions() {
+		super(ConfigurationPhase.PARSE_CONFIGURATION);
+	}
+
+	@ConditionalOnMissingClass("org.springframework.cloud.client.circuitbreaker.CircuitBreaker")
+	static class CircuitBreakerClassMissing {
+
+	}
+
+	@ConditionalOnProperty(value = "feign.circuitbreaker.enabled", havingValue = "false",
+			matchIfMissing = true)
+	static class CircuitBreakerDisabled {
+
+	}
+
+}

spring-cloud-openfeign-core/src/main/java/org/springframework/cloud/openfeign/FeignCircuitBreakerInvocationHandler.java

@@ -0,0 +1,149 @@
+/*
+ * Copyright 2013-2020 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.cloud.openfeign;
+
+import java.lang.reflect.InvocationHandler;
+import java.lang.reflect.Method;
+import java.lang.reflect.Proxy;
+import java.util.LinkedHashMap;
+import java.util.Map;
+import java.util.function.Function;
+import java.util.function.Supplier;
+
+import feign.Feign;
+import feign.InvocationHandlerFactory;
+import feign.Target;
+
+import org.springframework.cloud.client.circuitbreaker.CircuitBreaker;
+import org.springframework.cloud.client.circuitbreaker.CircuitBreakerFactory;
+
+import static feign.Util.checkNotNull;
+
+class FeignCircuitBreakerInvocationHandler implements InvocationHandler {
+
+	private final CircuitBreakerFactory factory;
+
+	private final Target<?> target;
+
+	private final Map<Method, InvocationHandlerFactory.MethodHandler> dispatch;
+
+	private final FallbackFactory<?> nullableFallbackFactory;
+
+	private final Map<Method, Method> fallbackMethodMap;
+
+	FeignCircuitBreakerInvocationHandler(CircuitBreakerFactory factory, Target<?> target,
+			Map<Method, InvocationHandlerFactory.MethodHandler> dispatch,
+			FallbackFactory<?> nullableFallbackFactory) {
+		this.factory = factory;
+		this.target = checkNotNull(target, "target");
+		this.dispatch = checkNotNull(dispatch, "dispatch");
+		this.fallbackMethodMap = toFallbackMethod(dispatch);
+		this.nullableFallbackFactory = nullableFallbackFactory;
+	}
+
+	@Override
+	public Object invoke(final Object proxy, final Method method, final Object[] args)
+			throws Throwable {
+		// early exit if the invoked method is from java.lang.Object
+		// code is the same as ReflectiveFeign.FeignInvocationHandler
+		if ("equals".equals(method.getName())) {
+			try {
+				Object otherHandler = args.length > 0 && args[0] != null
+						? Proxy.getInvocationHandler(args[0]) : null;
+				return equals(otherHandler);
+			}
+			catch (IllegalArgumentException e) {
+				return false;
+			}
+		}
+		else if ("hashCode".equals(method.getName())) {
+			return hashCode();
+		}
+		else if ("toString".equals(method.getName())) {
+			return toString();
+		}
+		String circuitName = Feign.configKey(target.type(), method);
+		CircuitBreaker circuitBreaker = this.factory.create(circuitName);
+		Supplier<Object> supplier = asSupplier(method, args);
+		if (this.nullableFallbackFactory != null) {
+			Function<Throwable, Object> fallbackFunction = throwable -> {
+				Object fallback = this.nullableFallbackFactory.create(throwable);
+				try {
+					return this.fallbackMethodMap.get(method).invoke(fallback, args);
+				}
+				catch (Exception e) {
+					throw new IllegalStateException(e);
+				}
+			};
+			return circuitBreaker.run(supplier, fallbackFunction);
+		}
+		return circuitBreaker.run(supplier);
+	}
+
+	private Supplier<Object> asSupplier(final Method method, final Object[] args) {
+		return () -> {
+			try {
+				return this.dispatch.get(method).invoke(args);
+			}
+			catch (RuntimeException throwable) {
+				throw throwable;
+			}
+			catch (Throwable throwable) {
+				throw new RuntimeException(throwable);
+			}
+		};
+	}
+
+	/**
+	 * If the method param of InvocationHandler.invoke is not accessible, i.e in a
+	 * package-private interface, the fallback call will cause of access restrictions. But
+	 * methods in dispatch are copied methods. So setting access to dispatch method
+	 * doesn't take effect to the method in InvocationHandler.invoke. Use map to store a
+	 * copy of method to invoke the fallback to bypass this and reducing the count of
+	 * reflection calls.
+	 * @return cached methods map for fallback invoking
+	 */
+	static Map<Method, Method> toFallbackMethod(
+			Map<Method, InvocationHandlerFactory.MethodHandler> dispatch) {
+		Map<Method, Method> result = new LinkedHashMap<Method, Method>();
+		for (Method method : dispatch.keySet()) {
+			method.setAccessible(true);
+			result.put(method, method);
+		}
+		return result;
+	}
+
+	@Override
+	public boolean equals(Object obj) {
+		if (obj instanceof FeignCircuitBreakerInvocationHandler) {
+			FeignCircuitBreakerInvocationHandler other = (FeignCircuitBreakerInvocationHandler) obj;
+			return this.target.equals(other.target);
+		}
+		return false;
+	}
+
+	@Override
+	public int hashCode() {
+		return this.target.hashCode();
+	}
+
+	@Override
+	public String toString() {
+		return this.target.toString();
+	}
+
+}

spring-cloud-openfeign-core/src/main/java/org/springframework/cloud/openfeign/FeignCircuitBreakerTargeter.java

@@ -0,0 +1,97 @@
+/*
+ * Copyright 2013-2020 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.cloud.openfeign;
+
+import feign.Feign;
+import feign.Target;
+
+import org.springframework.cloud.client.circuitbreaker.CircuitBreakerFactory;
+import org.springframework.util.StringUtils;
+
+@SuppressWarnings("unchecked")
+class FeignCircuitBreakerTargeter implements Targeter {
+
+	private final CircuitBreakerFactory circuitBreakerFactory;
+
+	FeignCircuitBreakerTargeter(CircuitBreakerFactory circuitBreakerFactory) {
+		this.circuitBreakerFactory = circuitBreakerFactory;
+	}
+
+	@Override
+	public <T> T target(FeignClientFactoryBean factory, Feign.Builder feign,
+			FeignContext context, Target.HardCodedTarget<T> target) {
+		if (!(feign instanceof FeignCircuitBreaker.Builder)) {
+			return feign.target(target);
+		}
+		FeignCircuitBreaker.Builder builder = (FeignCircuitBreaker.Builder) feign;
+		String name = !StringUtils.hasText(factory.getContextId()) ? factory.getName()
+				: factory.getContextId();
+		Class<?> fallback = factory.getFallback();
+		if (fallback != void.class) {
+			return targetWithFallback(name, context, target, builder, fallback);
+		}
+		Class<?> fallbackFactory = factory.getFallbackFactory();
+		if (fallbackFactory != void.class) {
+			return targetWithFallbackFactory(name, context, target, builder,
+					fallbackFactory);
+		}
+		return builder(name, builder).target(target);
+	}
+
+	private <T> T targetWithFallbackFactory(String feignClientName, FeignContext context,
+			Target.HardCodedTarget<T> target, FeignCircuitBreaker.Builder builder,
+			Class<?> fallbackFactoryClass) {
+		FallbackFactory<? extends T> fallbackFactory = (FallbackFactory<? extends T>) getFromContext(
+				"fallbackFactory", feignClientName, context, fallbackFactoryClass,
+				FallbackFactory.class);
+		return builder(feignClientName, builder).target(target, fallbackFactory);
+	}
+
+	private <T> T targetWithFallback(String feignClientName, FeignContext context,
+			Target.HardCodedTarget<T> target, FeignCircuitBreaker.Builder builder,
+			Class<?> fallback) {
+		T fallbackInstance = getFromContext("fallback", feignClientName, context,
+				fallback, target.type());
+		return builder(feignClientName, builder).target(target, fallbackInstance);
+	}
+
+	private <T> T getFromContext(String fallbackMechanism, String feignClientName,
+			FeignContext context, Class<?> beanType, Class<T> targetType) {
+		Object fallbackInstance = context.getInstance(feignClientName, beanType);
+		if (fallbackInstance == null) {
+			throw new IllegalStateException(String.format(
+					"No " + fallbackMechanism
+							+ " instance of type %s found for feign client %s",
+					beanType, feignClientName));
+		}
+
+		if (!targetType.isAssignableFrom(beanType)) {
+			throw new IllegalStateException(String.format("Incompatible "
+					+ fallbackMechanism
+					+ " instance. Fallback/fallbackFactory of type %s is not assignable to %s for feign client %s",
+					beanType, targetType, feignClientName));
+		}
+		return (T) fallbackInstance;
+	}
+
+	private FeignCircuitBreaker.Builder builder(String feignClientName,
+			FeignCircuitBreaker.Builder builder) {
+		return builder.circuitBreakerFactory(this.circuitBreakerFactory)
+				.feignClientName(feignClientName);
+	}
+
+}

spring-cloud-openfeign-core/src/main/java/org/springframework/cloud/openfeign/FeignClient.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -33,6 +33,7 @@ import org.springframework.core.annotation.AliasFor;
  *
  * @author Spencer Gibb
  * @author Venil Noronha
+ * @author Olga Maciaszek-Sharma
  */
 @Target(ElementType.TYPE)
 @Retention(RetentionPolicy.RUNTIME)
@@ -73,9 +74,28 @@ public @interface FeignClient {
 
 	/**
 	 * @return the <code>@Qualifier</code> value for the feign client.
+	 * @deprecated in favour of {@link #qualifiers()}.
+	 *
+	 * If both {@link #qualifier()} and {@link #qualifiers()} are present, we will use the
+	 * latter, unless the array returned by {@link #qualifiers()} is empty or only
+	 * contains <code>null</code> or whitespace values, in which case we'll fall back
+	 * first to {@link #qualifier()} and, if that's also not present, to the default =
+	 * <code>contextId + "FeignClient"</code>.
 	 */
+	@Deprecated
 	String qualifier() default "";
 
+	/**
+	 * @return the <code>@Qualifiers</code> value for the feign client.
+	 *
+	 * If both {@link #qualifier()} and {@link #qualifiers()} are present, we will use the
+	 * latter, unless the array returned by {@link #qualifiers()} is empty or only
+	 * contains <code>null</code> or whitespace values, in which case we'll fall back
+	 * first to {@link #qualifier()} and, if that's also not present, to the default =
+	 * <code>contextId + "FeignClient"</code>.
+	 */
+	String[] qualifiers() default {};
+
 	/**
 	 * @return an absolute URL or resolvable hostname (the protocol is optional).
 	 */
@@ -109,6 +129,7 @@ public @interface FeignClient {
 	 * annotated by {@link FeignClient}. The fallback factory must be a valid spring bean.
 	 *
 	 * @see feign.hystrix.FallbackFactory for details.
+	 * @see FallbackFactory for details.
 	 * @return fallback factory for the specified Feign client interface
 	 */
 	Class<?> fallbackFactory() default void.class;

spring-cloud-openfeign-core/src/main/java/org/springframework/cloud/openfeign/FeignClientBuilder.java

@@ -16,6 +16,7 @@
 
 package org.springframework.cloud.openfeign;
 
+import feign.Feign;
 import feign.hystrix.FallbackFactory;
 
 import org.springframework.context.ApplicationContext;
@@ -28,6 +29,7 @@ import org.springframework.context.ApplicationContext;
  *
  * @author Sven Döring
  * @author Matt King
+ * @author Sam Kruglov
  */
 public class FeignClientBuilder {
 
@@ -69,6 +71,18 @@ public class FeignClientBuilder {
 			return this;
 		}
 
+		/**
+		 * Applies a {@link FeignBuilderCustomizer} to the underlying
+		 * {@link Feign.Builder}. May be called multiple times.
+		 * @param customizer applied in the same order as supplied here after applying
+		 * customizers found in the context.
+		 * @return the {@link Builder} with the customizer added
+		 */
+		public Builder<T> customize(final FeignBuilderCustomizer customizer) {
+			this.feignClientFactoryBean.addCustomizer(customizer);
+			return this;
+		}
+
 		public Builder<T> contextId(final String contextId) {
 			this.feignClientFactoryBean.setContextId(contextId);
 			return this;

spring-cloud-openfeign-core/src/main/java/org/springframework/cloud/openfeign/FeignClientFactoryBean.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,6 +16,8 @@
 
 package org.springframework.cloud.openfeign;
 
+import java.util.ArrayList;
+import java.util.List;
 import java.util.Map;
 import java.util.Objects;
 import java.util.concurrent.TimeUnit;
@@ -33,17 +35,23 @@ import feign.Target.HardCodedTarget;
 import feign.codec.Decoder;
 import feign.codec.Encoder;
 import feign.codec.ErrorDecoder;
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
 
 import org.springframework.beans.BeanUtils;
 import org.springframework.beans.BeansException;
+import org.springframework.beans.factory.BeanFactory;
+import org.springframework.beans.factory.BeanFactoryAware;
 import org.springframework.beans.factory.FactoryBean;
 import org.springframework.beans.factory.InitializingBean;
 import org.springframework.beans.factory.NoSuchBeanDefinitionException;
 import org.springframework.cloud.openfeign.clientconfig.FeignClientConfigurer;
 import org.springframework.cloud.openfeign.loadbalancer.FeignBlockingLoadBalancerClient;
+import org.springframework.cloud.openfeign.loadbalancer.RetryableFeignBlockingLoadBalancerClient;
 import org.springframework.cloud.openfeign.ribbon.LoadBalancerFeignClient;
 import org.springframework.context.ApplicationContext;
 import org.springframework.context.ApplicationContextAware;
+import org.springframework.core.annotation.AnnotationAwareOrderComparator;
 import org.springframework.util.Assert;
 import org.springframework.util.StringUtils;
 
@@ -54,15 +62,20 @@ import org.springframework.util.StringUtils;
  * @author Gregor Zurowski
  * @author Matt King
  * @author Olga Maciaszek-Sharma
+ * @author Ilia Ilinykh
+ * @author Marcin Grzejszczak
+ * @author Sam Kruglov
  */
-class FeignClientFactoryBean
+public class FeignClientFactoryBean implements FactoryBean<Object>, InitializingBean,
-		implements FactoryBean<Object>, InitializingBean, ApplicationContextAware {
+		ApplicationContextAware, BeanFactoryAware {
 
 	/***********************************
 	 * WARNING! Nothing in this class should be @Autowired. It causes NPEs because of some
 	 * lifecycle race condition.
 	 ***********************************/
 
+	private static Log LOG = LogFactory.getLog(FeignClientFactoryBean.class);
+
 	private Class<?> type;
 
 	private String name;
@@ -79,6 +92,8 @@ class FeignClientFactoryBean
 
 	private ApplicationContext applicationContext;
 
+	private BeanFactory beanFactory;
+
 	private Class<?> fallback = void.class;
 
 	private Class<?> fallbackFactory = void.class;
@@ -87,6 +102,10 @@ class FeignClientFactoryBean
 
 	private int connectTimeoutMillis = new Request.Options().connectTimeoutMillis();
 
+	private boolean followRedirects = new Request.Options().isFollowRedirects();
+
+	private List<FeignBuilderCustomizer> additionalCustomizers = new ArrayList<>();
+
 	@Override
 	public void afterPropertiesSet() {
 		Assert.hasText(contextId, "Context id must be set");
@@ -107,13 +126,28 @@ class FeignClientFactoryBean
 		// @formatter:on
 
 		configureFeign(context, builder);
+		applyBuildCustomizers(context, builder);
 
 		return builder;
 	}
 
+	private void applyBuildCustomizers(FeignContext context, Feign.Builder builder) {
+		Map<String, FeignBuilderCustomizer> customizerMap = context
+				.getInstances(contextId, FeignBuilderCustomizer.class);
+
+		if (customizerMap != null) {
+			customizerMap.values().stream()
+					.sorted(AnnotationAwareOrderComparator.INSTANCE)
+					.forEach(feignBuilderCustomizer -> feignBuilderCustomizer
+							.customize(builder));
+		}
+		additionalCustomizers.forEach(customizer -> customizer.customize(builder));
+	}
+
 	protected void configureFeign(FeignContext context, Feign.Builder builder) {
-		FeignClientProperties properties = applicationContext
+		FeignClientProperties properties = beanFactory != null
-				.getBean(FeignClientProperties.class);
+				? beanFactory.getBean(FeignClientProperties.class)
+				: applicationContext.getBean(FeignClientProperties.class);
 
 		FeignClientConfigurer feignClientConfigurer = getOptional(context,
 				FeignClientConfigurer.class);
@@ -169,11 +203,15 @@ class FeignClientFactoryBean
 			builder.options(options);
 			readTimeoutMillis = options.readTimeoutMillis();
 			connectTimeoutMillis = options.connectTimeoutMillis();
+			followRedirects = options.isFollowRedirects();
 		}
 		Map<String, RequestInterceptor> requestInterceptors = getInheritedAwareInstances(
 				context, RequestInterceptor.class);
 		if (requestInterceptors != null) {
-			builder.requestInterceptors(requestInterceptors.values());
+			List<RequestInterceptor> interceptors = new ArrayList<>(
+					requestInterceptors.values());
+			AnnotationAwareOrderComparator.sort(interceptors);
+			builder.requestInterceptors(interceptors);
 		}
 		QueryMapEncoder queryMapEncoder = getInheritedAwareOptional(context,
 				QueryMapEncoder.class);
@@ -205,9 +243,11 @@ class FeignClientFactoryBean
 				? config.getConnectTimeout() : connectTimeoutMillis;
 		readTimeoutMillis = config.getReadTimeout() != null ? config.getReadTimeout()
 				: readTimeoutMillis;
+		followRedirects = config.isFollowRedirects() != null ? config.isFollowRedirects()
+				: followRedirects;
 
 		builder.options(new Request.Options(connectTimeoutMillis, TimeUnit.MILLISECONDS,
-				readTimeoutMillis, TimeUnit.MILLISECONDS, true));
+				readTimeoutMillis, TimeUnit.MILLISECONDS, followRedirects));
 
 		if (config.getRetryer() != null) {
 			Retryer retryer = getOrInstantiate(config.getRetryer());
@@ -238,6 +278,16 @@ class FeignClientFactoryBean
 			builder.encoder(getOrInstantiate(config.getEncoder()));
 		}
 
+		if (Objects.nonNull(config.getDefaultRequestHeaders())) {
+			builder.requestInterceptor(requestTemplate -> requestTemplate
+					.headers(config.getDefaultRequestHeaders()));
+		}
+
+		if (Objects.nonNull(config.getDefaultQueryParameters())) {
+			builder.requestInterceptor(requestTemplate -> requestTemplate
+					.queries(config.getDefaultQueryParameters()));
+		}
+
 		if (Objects.nonNull(config.getDecoder())) {
 			builder.decoder(getOrInstantiate(config.getDecoder()));
 		}
@@ -253,7 +303,8 @@ class FeignClientFactoryBean
 
 	private <T> T getOrInstantiate(Class<T> tClass) {
 		try {
-			return applicationContext.getBean(tClass);
+			return beanFactory != null ? beanFactory.getBean(tClass)
+					: applicationContext.getBean(tClass);
 		}
 		catch (NoSuchBeanDefinitionException e) {
 			return BeanUtils.instantiateClass(tClass);
@@ -302,11 +353,11 @@ class FeignClientFactoryBean
 		}
 
 		throw new IllegalStateException(
-				"No Feign Client for loadBalancing defined. Did you forget to include spring-cloud-starter-netflix-ribbon?");
+				"No Feign Client for loadBalancing defined. Did you forget to include spring-cloud-starter-netflix-ribbon or spring-cloud-starter-loadbalancer?");
 	}
 
 	@Override
-	public Object getObject() throws Exception {
+	public Object getObject() {
 		return getTarget();
 	}
 
@@ -316,10 +367,17 @@ class FeignClientFactoryBean
 	 * information
 	 */
 	<T> T getTarget() {
-		FeignContext context = applicationContext.getBean(FeignContext.class);
+		FeignContext context = beanFactory != null
+				? beanFactory.getBean(FeignContext.class)
+				: applicationContext.getBean(FeignContext.class);
 		Feign.Builder builder = feign(context);
 
 		if (!StringUtils.hasText(url)) {
+
+			if (LOG.isInfoEnabled()) {
+				LOG.info("For '" + name
+						+ "' URL not provided. Will try picking an instance via load-balancing.");
+			}
 			if (!name.startsWith("http")) {
 				url = "http://" + name;
 			}
@@ -346,6 +404,12 @@ class FeignClientFactoryBean
 				// but Spring Cloud LoadBalancer is on the classpath, so unwrap
 				client = ((FeignBlockingLoadBalancerClient) client).getDelegate();
 			}
+			if (client instanceof RetryableFeignBlockingLoadBalancerClient) {
+				// not load balancing because we have a url,
+				// but Spring Cloud LoadBalancer is on the classpath, so unwrap
+				client = ((RetryableFeignBlockingLoadBalancerClient) client)
+						.getDelegate();
+			}
 			builder.client(client);
 		}
 		Targeter targeter = get(context, Targeter.class);
@@ -432,13 +496,18 @@ class FeignClientFactoryBean
 		this.inheritParentContext = inheritParentContext;
 	}
 
+	public void addCustomizer(FeignBuilderCustomizer customizer) {
+		additionalCustomizers.add(customizer);
+	}
+
 	public ApplicationContext getApplicationContext() {
 		return applicationContext;
 	}
 
 	@Override
 	public void setApplicationContext(ApplicationContext context) throws BeansException {
-		this.applicationContext = context;
+		applicationContext = context;
+		beanFactory = context;
 	}
 
 	public Class<?> getFallback() {
@@ -467,18 +536,23 @@ class FeignClientFactoryBean
 		}
 		FeignClientFactoryBean that = (FeignClientFactoryBean) o;
 		return Objects.equals(applicationContext, that.applicationContext)
+				&& Objects.equals(beanFactory, that.beanFactory)
 				&& decode404 == that.decode404
 				&& inheritParentContext == that.inheritParentContext
 				&& Objects.equals(fallback, that.fallback)
 				&& Objects.equals(fallbackFactory, that.fallbackFactory)
 				&& Objects.equals(name, that.name) && Objects.equals(path, that.path)
-				&& Objects.equals(type, that.type) && Objects.equals(url, that.url);
+				&& Objects.equals(type, that.type) && Objects.equals(url, that.url)
+				&& Objects.equals(connectTimeoutMillis, that.connectTimeoutMillis)
+				&& Objects.equals(readTimeoutMillis, that.readTimeoutMillis)
+				&& Objects.equals(followRedirects, that.followRedirects);
 	}
 
 	@Override
 	public int hashCode() {
-		return Objects.hash(applicationContext, decode404, inheritParentContext, fallback,
+		return Objects.hash(applicationContext, beanFactory, decode404,
-				fallbackFactory, name, path, type, url);
+				inheritParentContext, fallback, fallbackFactory, name, path, type, url,
+				readTimeoutMillis, connectTimeoutMillis, followRedirects);
 	}
 
 	@Override
@@ -489,9 +563,18 @@ class FeignClientFactoryBean
 				.append("decode404=").append(decode404).append(", ")
 				.append("inheritParentContext=").append(inheritParentContext).append(", ")
 				.append("applicationContext=").append(applicationContext).append(", ")
+				.append("beanFactory=").append(beanFactory).append(", ")
 				.append("fallback=").append(fallback).append(", ")
 				.append("fallbackFactory=").append(fallbackFactory).append("}")
+				.append("connectTimeoutMillis=").append(connectTimeoutMillis).append("}")
+				.append("readTimeoutMillis=").append(readTimeoutMillis).append("}")
+				.append("followRedirects=").append(followRedirects).append("}")
 				.toString();
 	}
 
+	@Override
+	public void setBeanFactory(BeanFactory beanFactory) throws BeansException {
+		this.beanFactory = beanFactory;
+	}
+
 }

spring-cloud-openfeign-core/src/main/java/org/springframework/cloud/openfeign/FeignClientProperties.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,6 +16,7 @@
 
 package org.springframework.cloud.openfeign;
 
+import java.util.Collection;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -34,6 +35,9 @@ import org.springframework.boot.context.properties.ConfigurationProperties;
 
 /**
  * @author Eko Kurniawan Khannedy
+ * @author Ilia Ilinykh
+ * @author Ram Anaswara
+ * @author Olga Maciaszek-Sharma
  */
 @ConfigurationProperties("feign.client")
 public class FeignClientProperties {
@@ -44,8 +48,14 @@ public class FeignClientProperties {
 
 	private Map<String, FeignClientConfiguration> config = new HashMap<>();
 
+	/**
+	 * Feign clients do not encode slash `/` characters by default. To change this
+	 * behavior, set the `decodeSlash` to `false`.
+	 */
+	private boolean decodeSlash = true;
+
 	public boolean isDefaultToProperties() {
-		return this.defaultToProperties;
+		return defaultToProperties;
 	}
 
 	public void setDefaultToProperties(boolean defaultToProperties) {
@@ -53,7 +63,7 @@ public class FeignClientProperties {
 	}
 
 	public String getDefaultConfig() {
-		return this.defaultConfig;
+		return defaultConfig;
 	}
 
 	public void setDefaultConfig(String defaultConfig) {
@@ -61,13 +71,21 @@ public class FeignClientProperties {
 	}
 
 	public Map<String, FeignClientConfiguration> getConfig() {
-		return this.config;
+		return config;
 	}
 
 	public void setConfig(Map<String, FeignClientConfiguration> config) {
 		this.config = config;
 	}
 
+	public boolean isDecodeSlash() {
+		return decodeSlash;
+	}
+
+	public void setDecodeSlash(boolean decodeSlash) {
+		this.decodeSlash = decodeSlash;
+	}
+
 	@Override
 	public boolean equals(Object o) {
 		if (this == o) {
@@ -77,14 +95,15 @@ public class FeignClientProperties {
 			return false;
 		}
 		FeignClientProperties that = (FeignClientProperties) o;
-		return this.defaultToProperties == that.defaultToProperties
+		return defaultToProperties == that.defaultToProperties
-				&& Objects.equals(this.defaultConfig, that.defaultConfig)
+				&& Objects.equals(defaultConfig, that.defaultConfig)
-				&& Objects.equals(this.config, that.config);
+				&& Objects.equals(config, that.config)
+				&& Objects.equals(decodeSlash, that.decodeSlash);
 	}
 
 	@Override
 	public int hashCode() {
-		return Objects.hash(this.defaultToProperties, this.defaultConfig, this.config);
+		return Objects.hash(defaultToProperties, defaultConfig, config, decodeSlash);
 	}
 
 	/**
@@ -104,6 +123,10 @@ public class FeignClientProperties {
 
 		private List<Class<RequestInterceptor>> requestInterceptors;
 
+		private Map<String, Collection<String>> defaultRequestHeaders;
+
+		private Map<String, Collection<String>> defaultQueryParameters;
+
 		private Boolean decode404;
 
 		private Class<Decoder> decoder;
@@ -114,8 +137,10 @@ public class FeignClientProperties {
 
 		private ExceptionPropagationPolicy exceptionPropagationPolicy;
 
+		private Boolean followRedirects;
+
 		public Logger.Level getLoggerLevel() {
-			return this.loggerLevel;
+			return loggerLevel;
 		}
 
 		public void setLoggerLevel(Logger.Level loggerLevel) {
@@ -123,7 +148,7 @@ public class FeignClientProperties {
 		}
 
 		public Integer getConnectTimeout() {
-			return this.connectTimeout;
+			return connectTimeout;
 		}
 
 		public void setConnectTimeout(Integer connectTimeout) {
@@ -131,7 +156,7 @@ public class FeignClientProperties {
 		}
 
 		public Integer getReadTimeout() {
-			return this.readTimeout;
+			return readTimeout;
 		}
 
 		public void setReadTimeout(Integer readTimeout) {
@@ -139,7 +164,7 @@ public class FeignClientProperties {
 		}
 
 		public Class<Retryer> getRetryer() {
-			return this.retryer;
+			return retryer;
 		}
 
 		public void setRetryer(Class<Retryer> retryer) {
@@ -147,7 +172,7 @@ public class FeignClientProperties {
 		}
 
 		public Class<ErrorDecoder> getErrorDecoder() {
-			return this.errorDecoder;
+			return errorDecoder;
 		}
 
 		public void setErrorDecoder(Class<ErrorDecoder> errorDecoder) {
@@ -155,7 +180,7 @@ public class FeignClientProperties {
 		}
 
 		public List<Class<RequestInterceptor>> getRequestInterceptors() {
-			return this.requestInterceptors;
+			return requestInterceptors;
 		}
 
 		public void setRequestInterceptors(
@@ -163,8 +188,26 @@ public class FeignClientProperties {
 			this.requestInterceptors = requestInterceptors;
 		}
 
+		public Map<String, Collection<String>> getDefaultRequestHeaders() {
+			return defaultRequestHeaders;
+		}
+
+		public void setDefaultRequestHeaders(
+				Map<String, Collection<String>> defaultRequestHeaders) {
+			this.defaultRequestHeaders = defaultRequestHeaders;
+		}
+
+		public Map<String, Collection<String>> getDefaultQueryParameters() {
+			return defaultQueryParameters;
+		}
+
+		public void setDefaultQueryParameters(
+				Map<String, Collection<String>> defaultQueryParameters) {
+			this.defaultQueryParameters = defaultQueryParameters;
+		}
+
 		public Boolean getDecode404() {
-			return this.decode404;
+			return decode404;
 		}
 
 		public void setDecode404(Boolean decode404) {
@@ -172,7 +215,7 @@ public class FeignClientProperties {
 		}
 
 		public Class<Decoder> getDecoder() {
-			return this.decoder;
+			return decoder;
 		}
 
 		public void setDecoder(Class<Decoder> decoder) {
@@ -180,7 +223,7 @@ public class FeignClientProperties {
 		}
 
 		public Class<Encoder> getEncoder() {
-			return this.encoder;
+			return encoder;
 		}
 
 		public void setEncoder(Class<Encoder> encoder) {
@@ -188,7 +231,7 @@ public class FeignClientProperties {
 		}
 
 		public Class<Contract> getContract() {
-			return this.contract;
+			return contract;
 		}
 
 		public void setContract(Class<Contract> contract) {
@@ -204,6 +247,14 @@ public class FeignClientProperties {
 			this.exceptionPropagationPolicy = exceptionPropagationPolicy;
 		}
 
+		public Boolean isFollowRedirects() {
+			return followRedirects;
+		}
+
+		public void setFollowRedirects(Boolean followRedirects) {
+			this.followRedirects = followRedirects;
+		}
+
 		@Override
 		public boolean equals(Object o) {
 			if (this == o) {
@@ -213,26 +264,29 @@ public class FeignClientProperties {
 				return false;
 			}
 			FeignClientConfiguration that = (FeignClientConfiguration) o;
-			return this.loggerLevel == that.loggerLevel
+			return loggerLevel == that.loggerLevel
-					&& Objects.equals(this.connectTimeout, that.connectTimeout)
+					&& Objects.equals(connectTimeout, that.connectTimeout)
-					&& Objects.equals(this.readTimeout, that.readTimeout)
+					&& Objects.equals(readTimeout, that.readTimeout)
-					&& Objects.equals(this.retryer, that.retryer)
+					&& Objects.equals(retryer, that.retryer)
-					&& Objects.equals(this.errorDecoder, that.errorDecoder)
+					&& Objects.equals(errorDecoder, that.errorDecoder)
-					&& Objects.equals(this.requestInterceptors, that.requestInterceptors)
+					&& Objects.equals(requestInterceptors, that.requestInterceptors)
-					&& Objects.equals(this.decode404, that.decode404)
+					&& Objects.equals(decode404, that.decode404)
-					&& Objects.equals(this.encoder, that.encoder)
+					&& Objects.equals(encoder, that.encoder)
-					&& Objects.equals(this.decoder, that.decoder)
+					&& Objects.equals(decoder, that.decoder)
-					&& Objects.equals(this.contract, that.contract)
+					&& Objects.equals(contract, that.contract)
-					&& Objects.equals(this.exceptionPropagationPolicy,
+					&& Objects.equals(exceptionPropagationPolicy,
-							that.exceptionPropagationPolicy);
+							that.exceptionPropagationPolicy)
+					&& Objects.equals(defaultRequestHeaders, that.defaultRequestHeaders)
+					&& Objects.equals(defaultQueryParameters, that.defaultQueryParameters)
+					&& Objects.equals(followRedirects, that.followRedirects);
 		}
 
 		@Override
 		public int hashCode() {
-			return Objects.hash(this.loggerLevel, this.connectTimeout, this.readTimeout,
+			return Objects.hash(loggerLevel, connectTimeout, readTimeout, retryer,
-					this.retryer, this.errorDecoder, this.requestInterceptors,
+					errorDecoder, requestInterceptors, decode404, encoder, decoder,
-					this.decode404, this.encoder, this.decoder, this.contract,
+					contract, exceptionPropagationPolicy, defaultQueryParameters,
-					this.exceptionPropagationPolicy);
+					defaultRequestHeaders, followRedirects);
 		}
 
 	}

spring-cloud-openfeign-core/src/main/java/org/springframework/cloud/openfeign/FeignClientsConfiguration.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -19,11 +19,11 @@ package org.springframework.cloud.openfeign;
 import java.util.ArrayList;
 import java.util.List;
 
-import com.fasterxml.jackson.databind.Module;
 import com.netflix.hystrix.HystrixCommand;
 import feign.Contract;
 import feign.Feign;
 import feign.Logger;
+import feign.QueryMapEncoder;
 import feign.Retryer;
 import feign.codec.Decoder;
 import feign.codec.Encoder;
@@ -35,18 +35,21 @@ import feign.optionals.OptionalDecoder;
 import org.springframework.beans.factory.ObjectFactory;
 import org.springframework.beans.factory.ObjectProvider;
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingClass;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.boot.autoconfigure.data.web.SpringDataWebProperties;
 import org.springframework.boot.autoconfigure.http.HttpMessageConverters;
+import org.springframework.cloud.client.circuitbreaker.CircuitBreaker;
+import org.springframework.cloud.client.circuitbreaker.CircuitBreakerFactory;
 import org.springframework.cloud.openfeign.clientconfig.FeignClientConfigurer;
 import org.springframework.cloud.openfeign.support.AbstractFormWriter;
-import org.springframework.cloud.openfeign.support.PageJacksonModule;
+import org.springframework.cloud.openfeign.support.FeignEncoderProperties;
 import org.springframework.cloud.openfeign.support.PageableSpringEncoder;
+import org.springframework.cloud.openfeign.support.PageableSpringQueryMapEncoder;
 import org.springframework.cloud.openfeign.support.ResponseEntityDecoder;
-import org.springframework.cloud.openfeign.support.SortJacksonModule;
 import org.springframework.cloud.openfeign.support.SpringDecoder;
 import org.springframework.cloud.openfeign.support.SpringEncoder;
 import org.springframework.cloud.openfeign.support.SpringMvcContract;
@@ -63,6 +66,8 @@ import static feign.form.ContentType.MULTIPART;
  * @author Dave Syer
  * @author Venil Noronha
  * @author Darren Foong
+ * @author Olga Maciaszek-Sharma
+ * @author Hyeonmin Park
  */
 @Configuration(proxyBeanMethods = false)
 public class FeignClientsConfiguration {
@@ -82,6 +87,12 @@ public class FeignClientsConfiguration {
 	@Autowired(required = false)
 	private SpringDataWebProperties springDataWebProperties;
 
+	@Autowired(required = false)
+	private FeignClientProperties feignClientProperties;
+
+	@Autowired(required = false)
+	private FeignEncoderProperties encoderProperties;
+
 	@Bean
 	@ConditionalOnMissingBean
 	public Decoder feignDecoder() {
@@ -93,7 +104,7 @@ public class FeignClientsConfiguration {
 	@ConditionalOnMissingBean
 	@ConditionalOnMissingClass("org.springframework.data.domain.Pageable")
 	public Encoder feignEncoder(ObjectProvider<AbstractFormWriter> formWriterProvider) {
-		return springEncoder(formWriterProvider);
+		return springEncoder(formWriterProvider, encoderProperties);
 	}
 
 	@Bean
@@ -102,7 +113,7 @@ public class FeignClientsConfiguration {
 	public Encoder feignEncoderPageable(
 			ObjectProvider<AbstractFormWriter> formWriterProvider) {
 		PageableSpringEncoder encoder = new PageableSpringEncoder(
-				springEncoder(formWriterProvider));
+				springEncoder(formWriterProvider, encoderProperties));
 
 		if (springDataWebProperties != null) {
 			encoder.setPageParameter(
@@ -115,10 +126,20 @@ public class FeignClientsConfiguration {
 		return encoder;
 	}
 
+	@Bean
+	@ConditionalOnClass(name = "org.springframework.data.domain.Pageable")
+	@ConditionalOnMissingBean
+	public QueryMapEncoder feignQueryMapEncoderPageable() {
+		return new PageableSpringQueryMapEncoder();
+	}
+
 	@Bean
 	@ConditionalOnMissingBean
 	public Contract feignContract(ConversionService feignConversionService) {
-		return new SpringMvcContract(this.parameterProcessors, feignConversionService);
+		boolean decodeSlash = feignClientProperties == null
+				|| feignClientProperties.isDecodeSlash();
+		return new SpringMvcContract(this.parameterProcessors, feignConversionService,
+				decodeSlash);
 	}
 
 	@Bean
@@ -149,18 +170,6 @@ public class FeignClientsConfiguration {
 		return new DefaultFeignLoggerFactory(this.logger);
 	}
 
-	@Bean
-	@ConditionalOnClass(name = "org.springframework.data.domain.Page")
-	public Module pageJacksonModule() {
-		return new PageJacksonModule();
-	}
-
-	@Bean
-	@ConditionalOnClass(name = "org.springframework.data.domain.Page")
-	public Module sortModule() {
-		return new SortJacksonModule();
-	}
-
 	@Bean
 	@ConditionalOnMissingBean(FeignClientConfigurer.class)
 	public FeignClientConfigurer feignClientConfigurer() {
@@ -168,15 +177,17 @@ public class FeignClientsConfiguration {
 		};
 	}
 
-	private Encoder springEncoder(ObjectProvider<AbstractFormWriter> formWriterProvider) {
+	private Encoder springEncoder(ObjectProvider<AbstractFormWriter> formWriterProvider,
+			FeignEncoderProperties encoderProperties) {
 		AbstractFormWriter formWriter = formWriterProvider.getIfAvailable();
 
 		if (formWriter != null) {
 			return new SpringEncoder(new SpringPojoFormEncoder(formWriter),
-					this.messageConverters);
+					this.messageConverters, encoderProperties);
 		}
 		else {
-			return new SpringEncoder(new SpringFormEncoder(), this.messageConverters);
+			return new SpringEncoder(new SpringFormEncoder(), this.messageConverters,
+					encoderProperties);
 		}
 	}
 
@@ -206,4 +217,26 @@ public class FeignClientsConfiguration {
 
 	}
 
+	@Configuration(proxyBeanMethods = false)
+	@ConditionalOnClass(CircuitBreaker.class)
+	@ConditionalOnProperty("feign.circuitbreaker.enabled")
+	protected static class CircuitBreakerPresentFeignBuilderConfiguration {
+
+		@Bean
+		@Scope("prototype")
+		@ConditionalOnMissingBean({ Feign.Builder.class, CircuitBreakerFactory.class })
+		public Feign.Builder defaultFeignBuilder(Retryer retryer) {
+			return Feign.builder().retryer(retryer);
+		}
+
+		@Bean
+		@Scope("prototype")
+		@ConditionalOnMissingBean
+		@ConditionalOnBean(CircuitBreakerFactory.class)
+		public Feign.Builder circuitBreakerFeignBuilder() {
+			return FeignCircuitBreaker.builder();
+		}
+
+	}
+
 }

spring-cloud-openfeign-core/src/main/java/org/springframework/cloud/openfeign/FeignClientsRegistrar.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,21 +16,27 @@
 
 package org.springframework.cloud.openfeign;
 
-import java.io.IOException;
 import java.net.MalformedURLException;
 import java.net.URI;
 import java.net.URISyntaxException;
 import java.net.URL;
+import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.Collections;
 import java.util.HashSet;
+import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
 
 import org.springframework.beans.factory.FactoryBean;
 import org.springframework.beans.factory.annotation.AnnotatedBeanDefinition;
+import org.springframework.beans.factory.annotation.AnnotatedGenericBeanDefinition;
 import org.springframework.beans.factory.config.BeanDefinition;
 import org.springframework.beans.factory.config.BeanDefinitionHolder;
+import org.springframework.beans.factory.config.BeanExpressionContext;
+import org.springframework.beans.factory.config.BeanExpressionResolver;
+import org.springframework.beans.factory.config.ConfigurableBeanFactory;
 import org.springframework.beans.factory.support.AbstractBeanDefinition;
 import org.springframework.beans.factory.support.BeanDefinitionBuilder;
 import org.springframework.beans.factory.support.BeanDefinitionReaderUtils;
@@ -43,14 +49,10 @@ import org.springframework.core.annotation.AnnotationAttributes;
 import org.springframework.core.env.Environment;
 import org.springframework.core.io.ResourceLoader;
 import org.springframework.core.type.AnnotationMetadata;
-import org.springframework.core.type.ClassMetadata;
-import org.springframework.core.type.classreading.MetadataReader;
-import org.springframework.core.type.classreading.MetadataReaderFactory;
-import org.springframework.core.type.filter.AbstractClassTestingTypeFilter;
 import org.springframework.core.type.filter.AnnotationTypeFilter;
-import org.springframework.core.type.filter.TypeFilter;
 import org.springframework.util.Assert;
 import org.springframework.util.ClassUtils;
+import org.springframework.util.ObjectUtils;
 import org.springframework.util.StringUtils;
 
 /**
@@ -58,6 +60,9 @@ import org.springframework.util.StringUtils;
  * @author Jakub Narloch
  * @author Venil Noronha
  * @author Gang Li
+ * @author Michal Domagala
+ * @author Marcin Grzejszczak
+ * @author Olga Maciaszek-Sharma
  */
 class FeignClientsRegistrar
 		implements ImportBeanDefinitionRegistrar, ResourceLoaderAware, EnvironmentAware {
@@ -165,60 +170,43 @@ class FeignClientsRegistrar
 
 	public void registerFeignClients(AnnotationMetadata metadata,
 			BeanDefinitionRegistry registry) {
-		ClassPathScanningCandidateComponentProvider scanner = getScanner();
-		scanner.setResourceLoader(this.resourceLoader);
-
-		Set<String> basePackages;
 
+		LinkedHashSet<BeanDefinition> candidateComponents = new LinkedHashSet<>();
 		Map<String, Object> attrs = metadata
 				.getAnnotationAttributes(EnableFeignClients.class.getName());
-		AnnotationTypeFilter annotationTypeFilter = new AnnotationTypeFilter(
-				FeignClient.class);
 		final Class<?>[] clients = attrs == null ? null
 				: (Class<?>[]) attrs.get("clients");
 		if (clients == null || clients.length == 0) {
-			scanner.addIncludeFilter(annotationTypeFilter);
+			ClassPathScanningCandidateComponentProvider scanner = getScanner();
-			basePackages = getBasePackages(metadata);
+			scanner.setResourceLoader(this.resourceLoader);
+			scanner.addIncludeFilter(new AnnotationTypeFilter(FeignClient.class));
+			Set<String> basePackages = getBasePackages(metadata);
+			for (String basePackage : basePackages) {
+				candidateComponents.addAll(scanner.findCandidateComponents(basePackage));
+			}
 		}
 		else {
-			final Set<String> clientClasses = new HashSet<>();
-			basePackages = new HashSet<>();
 			for (Class<?> clazz : clients) {
-				basePackages.add(ClassUtils.getPackageName(clazz));
+				candidateComponents.add(new AnnotatedGenericBeanDefinition(clazz));
-				clientClasses.add(clazz.getCanonicalName());
 			}
-			AbstractClassTestingTypeFilter filter = new AbstractClassTestingTypeFilter() {
-				@Override
-				protected boolean match(ClassMetadata metadata) {
-					String cleaned = metadata.getClassName().replaceAll("\\$", ".");
-					return clientClasses.contains(cleaned);
-				}
-			};
-			scanner.addIncludeFilter(
-					new AllTypeFilter(Arrays.asList(filter, annotationTypeFilter)));
 		}
 
-		for (String basePackage : basePackages) {
+		for (BeanDefinition candidateComponent : candidateComponents) {
-			Set<BeanDefinition> candidateComponents = scanner
+			if (candidateComponent instanceof AnnotatedBeanDefinition) {
-					.findCandidateComponents(basePackage);
+				// verify annotated class is an interface
-			for (BeanDefinition candidateComponent : candidateComponents) {
+				AnnotatedBeanDefinition beanDefinition = (AnnotatedBeanDefinition) candidateComponent;
-				if (candidateComponent instanceof AnnotatedBeanDefinition) {
+				AnnotationMetadata annotationMetadata = beanDefinition.getMetadata();
-					// verify annotated class is an interface
+				Assert.isTrue(annotationMetadata.isInterface(),
-					AnnotatedBeanDefinition beanDefinition = (AnnotatedBeanDefinition) candidateComponent;
+						"@FeignClient can only be specified on an interface");
-					AnnotationMetadata annotationMetadata = beanDefinition.getMetadata();
-					Assert.isTrue(annotationMetadata.isInterface(),
-							"@FeignClient can only be specified on an interface");
 
-					Map<String, Object> attributes = annotationMetadata
+				Map<String, Object> attributes = annotationMetadata
-							.getAnnotationAttributes(
+						.getAnnotationAttributes(FeignClient.class.getCanonicalName());
-									FeignClient.class.getCanonicalName());
 
-					String name = getClientName(attributes);
+				String name = getClientName(attributes);
-					registerClientConfiguration(registry, name,
+				registerClientConfiguration(registry, name,
-							attributes.get("configuration"));
+						attributes.get("configuration"));
 
-					registerFeignClient(registry, annotationMetadata, attributes);
+				registerFeignClient(registry, annotationMetadata, attributes);
-				}
 			}
 		}
 	}
@@ -226,37 +214,57 @@ class FeignClientsRegistrar
 	private void registerFeignClient(BeanDefinitionRegistry registry,
 			AnnotationMetadata annotationMetadata, Map<String, Object> attributes) {
 		String className = annotationMetadata.getClassName();
-		BeanDefinitionBuilder definition = BeanDefinitionBuilder
+		Class clazz = ClassUtils.resolveClassName(className, null);
-				.genericBeanDefinition(FeignClientFactoryBean.class);
+		ConfigurableBeanFactory beanFactory = registry instanceof ConfigurableBeanFactory
-		validate(attributes);
+				? (ConfigurableBeanFactory) registry : null;
-		definition.addPropertyValue("url", getUrl(attributes));
+		String contextId = getContextId(beanFactory, attributes);
-		definition.addPropertyValue("path", getPath(attributes));
 		String name = getName(attributes);
-		definition.addPropertyValue("name", name);
+		FeignClientFactoryBean factoryBean = new FeignClientFactoryBean();
-		String contextId = getContextId(attributes);
+		factoryBean.setBeanFactory(beanFactory);
-		definition.addPropertyValue("contextId", contextId);
+		factoryBean.setName(name);
-		definition.addPropertyValue("type", className);
+		factoryBean.setContextId(contextId);
-		definition.addPropertyValue("decode404", attributes.get("decode404"));
+		factoryBean.setType(clazz);
-		definition.addPropertyValue("fallback", attributes.get("fallback"));
+		BeanDefinitionBuilder definition = BeanDefinitionBuilder
-		definition.addPropertyValue("fallbackFactory", attributes.get("fallbackFactory"));
+				.genericBeanDefinition(clazz, () -> {
+					factoryBean.setUrl(getUrl(beanFactory, attributes));
+					factoryBean.setPath(getPath(beanFactory, attributes));
+					factoryBean.setDecode404(Boolean
+							.parseBoolean(String.valueOf(attributes.get("decode404"))));
+					Object fallback = attributes.get("fallback");
+					if (fallback != null) {
+						factoryBean.setFallback(fallback instanceof Class
+								? (Class<?>) fallback
+								: ClassUtils.resolveClassName(fallback.toString(), null));
+					}
+					Object fallbackFactory = attributes.get("fallbackFactory");
+					if (fallbackFactory != null) {
+						factoryBean.setFallbackFactory(fallbackFactory instanceof Class
+								? (Class<?>) fallbackFactory
+								: ClassUtils.resolveClassName(fallbackFactory.toString(),
+										null));
+					}
+					return factoryBean.getObject();
+				});
 		definition.setAutowireMode(AbstractBeanDefinition.AUTOWIRE_BY_TYPE);
+		definition.setLazyInit(true);
+		validate(attributes);
 
-		String alias = contextId + "FeignClient";
 		AbstractBeanDefinition beanDefinition = definition.getBeanDefinition();
 		beanDefinition.setAttribute(FactoryBean.OBJECT_TYPE_ATTRIBUTE, className);
+		beanDefinition.setAttribute("feignClientsRegistrarFactoryBean", factoryBean);
 
 		// has a default, won't be null
 		boolean primary = (Boolean) attributes.get("primary");
 
 		beanDefinition.setPrimary(primary);
 
-		String qualifier = getQualifier(attributes);
+		String[] qualifiers = getQualifiers(attributes);
-		if (StringUtils.hasText(qualifier)) {
+		if (ObjectUtils.isEmpty(qualifiers)) {
-			alias = qualifier;
+			qualifiers = new String[] { contextId + "FeignClient" };
 		}
 
 		BeanDefinitionHolder holder = new BeanDefinitionHolder(beanDefinition, className,
-				new String[] { alias });
+				qualifiers);
 		BeanDefinitionReaderUtils.registerBeanDefinition(holder, registry);
 	}
 
@@ -269,6 +277,10 @@ class FeignClientsRegistrar
 	}
 
 	/* for testing */ String getName(Map<String, Object> attributes) {
+		return getName(null, attributes);
+	}
+
+	String getName(ConfigurableBeanFactory beanFactory, Map<String, Object> attributes) {
 		String name = (String) attributes.get("serviceId");
 		if (!StringUtils.hasText(name)) {
 			name = (String) attributes.get("name");
@@ -276,34 +288,46 @@ class FeignClientsRegistrar
 		if (!StringUtils.hasText(name)) {
 			name = (String) attributes.get("value");
 		}
-		name = resolve(name);
+		name = resolve(beanFactory, name);
 		return getName(name);
 	}
 
-	private String getContextId(Map<String, Object> attributes) {
+	private String getContextId(ConfigurableBeanFactory beanFactory,
+			Map<String, Object> attributes) {
 		String contextId = (String) attributes.get("contextId");
 		if (!StringUtils.hasText(contextId)) {
 			return getName(attributes);
 		}
 
-		contextId = resolve(contextId);
+		contextId = resolve(beanFactory, contextId);
 		return getName(contextId);
 	}
 
-	private String resolve(String value) {
+	private String resolve(ConfigurableBeanFactory beanFactory, String value) {
 		if (StringUtils.hasText(value)) {
-			return this.environment.resolvePlaceholders(value);
+			if (beanFactory == null) {
+				return this.environment.resolvePlaceholders(value);
+			}
+			BeanExpressionResolver resolver = beanFactory.getBeanExpressionResolver();
+			String resolved = beanFactory.resolveEmbeddedValue(value);
+			if (resolver == null) {
+				return resolved;
+			}
+			return String.valueOf(resolver.evaluate(resolved,
+					new BeanExpressionContext(beanFactory, null)));
 		}
 		return value;
 	}
 
-	private String getUrl(Map<String, Object> attributes) {
+	private String getUrl(ConfigurableBeanFactory beanFactory,
-		String url = resolve((String) attributes.get("url"));
+			Map<String, Object> attributes) {
+		String url = resolve(beanFactory, (String) attributes.get("url"));
 		return getUrl(url);
 	}
 
-	private String getPath(Map<String, Object> attributes) {
+	private String getPath(ConfigurableBeanFactory beanFactory,
-		String path = resolve((String) attributes.get("path"));
+			Map<String, Object> attributes) {
+		String path = resolve(beanFactory, (String) attributes.get("path"));
 		return getPath(path);
 	}
 
@@ -360,6 +384,19 @@ class FeignClientsRegistrar
 		return null;
 	}
 
+	private String[] getQualifiers(Map<String, Object> client) {
+		if (client == null) {
+			return null;
+		}
+		List<String> qualifierList = new ArrayList<>(
+				Arrays.asList((String[]) client.get("qualifiers")));
+		qualifierList.removeIf(qualifier -> !StringUtils.hasText(qualifier));
+		if (qualifierList.isEmpty() && getQualifier(client) != null) {
+			qualifierList = Collections.singletonList(getQualifier(client));
+		}
+		return !qualifierList.isEmpty() ? qualifierList.toArray(new String[0]) : null;
+	}
+
 	private String getClientName(Map<String, Object> client) {
 		if (client == null) {
 			return null;
@@ -398,38 +435,4 @@ class FeignClientsRegistrar
 		this.environment = environment;
 	}
 
-	/**
-	 * Helper class to create a {@link TypeFilter} that matches if all the delegates
-	 * match.
-	 *
-	 * @author Oliver Gierke
-	 */
-	private static class AllTypeFilter implements TypeFilter {
-
-		private final List<TypeFilter> delegates;
-
-		/**
-		 * Creates a new {@link AllTypeFilter} to match if all the given delegates match.
-		 * @param delegates must not be {@literal null}.
-		 */
-		AllTypeFilter(List<TypeFilter> delegates) {
-			Assert.notNull(delegates, "This argument is required, it must not be null");
-			this.delegates = delegates;
-		}
-
-		@Override
-		public boolean match(MetadataReader metadataReader,
-				MetadataReaderFactory metadataReaderFactory) throws IOException {
-
-			for (TypeFilter filter : this.delegates) {
-				if (!filter.match(metadataReader, metadataReaderFactory)) {
-					return false;
-				}
-			}
-
-			return true;
-		}
-
-	}
-
 }

spring-cloud-openfeign-core/src/main/java/org/springframework/cloud/openfeign/HttpClient5DisabledConditions.java

@@ -0,0 +1,43 @@
+/*
+ * Copyright 2013-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.cloud.openfeign;
+
+import org.springframework.boot.autoconfigure.condition.AnyNestedCondition;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingClass;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
+
+/**
+ * @author Nguyen Ky Thanh
+ */
+public class HttpClient5DisabledConditions extends AnyNestedCondition {
+
+	public HttpClient5DisabledConditions() {
+		super(ConfigurationPhase.PARSE_CONFIGURATION);
+	}
+
+	@ConditionalOnMissingClass("feign.hc5.ApacheHttp5Client")
+	static class ApacheHttp5ClientClassMissing {
+
+	}
+
+	@ConditionalOnProperty(value = "feign.httpclient.hc5.enabled", havingValue = "false",
+			matchIfMissing = true)
+	static class HttpClient5Disabled {
+
+	}
+
+}

spring-cloud-openfeign-core/src/main/java/org/springframework/cloud/openfeign/HystrixDisabledConditions.java

@@ -0,0 +1,42 @@
+/*
+ * Copyright 2013-2020 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.cloud.openfeign;
+
+import org.springframework.boot.autoconfigure.condition.AnyNestedCondition;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingClass;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
+
+/**
+ * @author Tim Peeters
+ */
+class HystrixDisabledConditions extends AnyNestedCondition {
+
+	HystrixDisabledConditions() {
+		super(ConfigurationPhase.PARSE_CONFIGURATION);
+	}
+
+	@ConditionalOnMissingClass("feign.hystrix.HystrixFeign")
+	static class HystrixFeignClassMissing {
+
+	}
+
+	@ConditionalOnProperty(value = "feign.hystrix.enabled", havingValue = "false")
+	static class HystrixFeignDisabled {
+
+	}
+
+}

spring-cloud-openfeign-core/src/main/java/org/springframework/cloud/openfeign/annotation/MatrixVariableParameterProcessor.java

@@ -75,7 +75,7 @@ public class MatrixVariableParameterProcessor implements AnnotatedParameterProce
 	private String expandMap(Object object) {
 		Map<String, Object> paramMap = (Map) object;
 
-		return paramMap.keySet().stream()
+		return paramMap.keySet().stream().filter(key -> paramMap.get(key) != null)
 				.map(key -> ";" + key + "=" + paramMap.get(key).toString())
 				.collect(Collectors.joining());
 	}

spring-cloud-openfeign-core/src/main/java/org/springframework/cloud/openfeign/clientconfig/HttpClient5FeignConfiguration.java

@@ -0,0 +1,162 @@
+/*
+ * Copyright 2013-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.cloud.openfeign.clientconfig;
+
+import java.security.KeyManagementException;
+import java.security.NoSuchAlgorithmException;
+import java.security.SecureRandom;
+import java.security.cert.CertificateException;
+import java.security.cert.X509Certificate;
+import java.util.concurrent.TimeUnit;
+
+import javax.annotation.PreDestroy;
+import javax.net.ssl.SSLContext;
+import javax.net.ssl.TrustManager;
+import javax.net.ssl.X509TrustManager;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.apache.hc.client5.http.config.RequestConfig;
+import org.apache.hc.client5.http.impl.classic.CloseableHttpClient;
+import org.apache.hc.client5.http.impl.classic.HttpClients;
+import org.apache.hc.client5.http.impl.io.PoolingHttpClientConnectionManagerBuilder;
+import org.apache.hc.client5.http.io.HttpClientConnectionManager;
+import org.apache.hc.client5.http.socket.LayeredConnectionSocketFactory;
+import org.apache.hc.client5.http.ssl.SSLConnectionSocketFactoryBuilder;
+import org.apache.hc.core5.http.io.SocketConfig;
+import org.apache.hc.core5.http.ssl.TLS;
+import org.apache.hc.core5.io.CloseMode;
+import org.apache.hc.core5.pool.PoolConcurrencyPolicy;
+import org.apache.hc.core5.pool.PoolReusePolicy;
+import org.apache.hc.core5.ssl.SSLContexts;
+import org.apache.hc.core5.util.TimeValue;
+import org.apache.hc.core5.util.Timeout;
+
+import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
+import org.springframework.cloud.openfeign.support.FeignHttpClientProperties;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+/**
+ * Default configuration for {@link CloseableHttpClient}.
+ *
+ * @author Nguyen Ky Thanh
+ */
+@Configuration(proxyBeanMethods = false)
+@ConditionalOnMissingBean(CloseableHttpClient.class)
+public class HttpClient5FeignConfiguration {
+
+	private static final Log LOG = LogFactory.getLog(HttpClient5FeignConfiguration.class);
+
+	private CloseableHttpClient httpClient5;
+
+	@Bean
+	@ConditionalOnMissingBean(HttpClientConnectionManager.class)
+	public HttpClientConnectionManager hc5ConnectionManager(
+			FeignHttpClientProperties httpClientProperties) {
+		return PoolingHttpClientConnectionManagerBuilder.create()
+				.setSSLSocketFactory(httpsSSLConnectionSocketFactory(
+						httpClientProperties.isDisableSslValidation()))
+				.setMaxConnTotal(httpClientProperties.getMaxConnections())
+				.setMaxConnPerRoute(httpClientProperties.getMaxConnectionsPerRoute())
+				.setConnPoolPolicy(PoolReusePolicy.valueOf(
+						httpClientProperties.getHc5().getPoolReusePolicy().name()))
+				.setPoolConcurrencyPolicy(PoolConcurrencyPolicy.valueOf(
+						httpClientProperties.getHc5().getPoolConcurrencyPolicy().name()))
+				.setConnectionTimeToLive(
+						TimeValue.of(httpClientProperties.getTimeToLive(),
+								httpClientProperties.getTimeToLiveUnit()))
+				.setDefaultSocketConfig(SocketConfig.custom()
+						.setSoTimeout(Timeout.of(
+								httpClientProperties.getHc5().getSocketTimeout(),
+								httpClientProperties.getHc5().getSocketTimeoutUnit()))
+						.build())
+				.build();
+	}
+
+	@Bean
+	public CloseableHttpClient httpClient5(HttpClientConnectionManager connectionManager,
+			FeignHttpClientProperties httpClientProperties) {
+		httpClient5 = HttpClients.custom().disableCookieManagement().useSystemProperties()
+				.setConnectionManager(connectionManager).evictExpiredConnections()
+				.setDefaultRequestConfig(
+						RequestConfig.custom()
+								.setConnectTimeout(Timeout.of(
+										httpClientProperties.getConnectionTimeout(),
+										TimeUnit.MILLISECONDS))
+								.setRedirectsEnabled(
+										httpClientProperties.isFollowRedirects())
+								.build())
+				.build();
+		return httpClient5;
+	}
+
+	@PreDestroy
+	public void destroy() {
+		if (httpClient5 != null) {
+			httpClient5.close(CloseMode.GRACEFUL);
+		}
+	}
+
+	private LayeredConnectionSocketFactory httpsSSLConnectionSocketFactory(
+			boolean isDisableSslValidation) {
+		final SSLConnectionSocketFactoryBuilder sslConnectionSocketFactoryBuilder = SSLConnectionSocketFactoryBuilder
+				.create().setTlsVersions(TLS.V_1_3, TLS.V_1_2);
+
+		if (isDisableSslValidation) {
+			try {
+				final SSLContext sslContext = SSLContext.getInstance("SSL");
+				sslContext.init(null,
+						new TrustManager[] { new DisabledValidationTrustManager() },
+						new SecureRandom());
+				sslConnectionSocketFactoryBuilder.setSslContext(sslContext);
+			}
+			catch (NoSuchAlgorithmException e) {
+				LOG.warn("Error creating SSLContext", e);
+			}
+			catch (KeyManagementException e) {
+				LOG.warn("Error creating SSLContext", e);
+			}
+		}
+		else {
+			sslConnectionSocketFactoryBuilder
+					.setSslContext(SSLContexts.createSystemDefault());
+		}
+
+		return sslConnectionSocketFactoryBuilder.build();
+	}
+
+	static class DisabledValidationTrustManager implements X509TrustManager {
+
+		DisabledValidationTrustManager() {
+		}
+
+		public void checkClientTrusted(X509Certificate[] x509Certificates, String s)
+				throws CertificateException {
+		}
+
+		public void checkServerTrusted(X509Certificate[] x509Certificates, String s)
+				throws CertificateException {
+		}
+
+		public X509Certificate[] getAcceptedIssuers() {
+			return null;
+		}
+
+	}
+
+}

spring-cloud-openfeign-core/src/main/java/org/springframework/cloud/openfeign/clientconfig/HttpClientFeignConfiguration.java

@@ -16,11 +16,14 @@
 
 package org.springframework.cloud.openfeign.clientconfig;
 
+import java.io.IOException;
 import java.util.Timer;
 import java.util.TimerTask;
 
 import javax.annotation.PreDestroy;
 
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
 import org.apache.http.client.config.RequestConfig;
 import org.apache.http.config.RegistryBuilder;
 import org.apache.http.conn.HttpClientConnectionManager;
@@ -48,6 +51,8 @@ import org.springframework.context.annotation.Configuration;
 @ConditionalOnMissingBean(CloseableHttpClient.class)
 public class HttpClientFeignConfiguration {
 
+	private static final Log LOG = LogFactory.getLog(HttpClientFeignConfiguration.class);
+
 	private final Timer connectionManagerTimer = new Timer(
 			"FeignApacheHttpClientConfiguration.connectionManagerTimer", true);
 
@@ -113,10 +118,17 @@ public class HttpClientFeignConfiguration {
 	}
 
 	@PreDestroy
-	public void destroy() throws Exception {
+	public void destroy() {
 		this.connectionManagerTimer.cancel();
 		if (this.httpClient != null) {
-			this.httpClient.close();
+			try {
+				this.httpClient.close();
+			}
+			catch (IOException e) {
+				if (LOG.isErrorEnabled()) {
+					LOG.error("Could not correctly close httpClient.");
+				}
+			}
 		}
 	}
 

spring-cloud-openfeign-core/src/main/java/org/springframework/cloud/openfeign/hateoas/FeignHalAutoConfiguration.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-2020 the original author or authors.
+ * Copyright 2016-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,37 +16,30 @@
 
 package org.springframework.cloud.openfeign.hateoas;
 
-import java.util.Arrays;
 import java.util.Collections;
 
-import com.fasterxml.jackson.databind.DeserializationFeature;
 import com.fasterxml.jackson.databind.ObjectMapper;
 
 import org.springframework.beans.factory.ObjectProvider;
 import org.springframework.boot.autoconfigure.AutoConfigureAfter;
-import org.springframework.boot.autoconfigure.AutoConfigureBefore;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnWebApplication;
 import org.springframework.boot.autoconfigure.data.rest.RepositoryRestMvcAutoConfiguration;
-import org.springframework.boot.autoconfigure.hateoas.HypermediaAutoConfiguration;
 import org.springframework.boot.autoconfigure.http.HttpMessageConvertersAutoConfiguration;
 import org.springframework.boot.autoconfigure.jackson.JacksonAutoConfiguration;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.hateoas.RepresentationModel;
-import org.springframework.hateoas.mediatype.MessageResolver;
+import org.springframework.hateoas.mediatype.hal.HalMediaTypeConfiguration;
-import org.springframework.hateoas.mediatype.hal.CurieProvider;
-import org.springframework.hateoas.mediatype.hal.DefaultCurieProvider;
-import org.springframework.hateoas.mediatype.hal.HalConfiguration;
-import org.springframework.hateoas.mediatype.hal.Jackson2HalModule;
-import org.springframework.hateoas.server.LinkRelationProvider;
 import org.springframework.hateoas.server.mvc.TypeConstrainedMappingJackson2HttpMessageConverter;
 
 import static org.springframework.hateoas.MediaTypes.HAL_JSON;
 
 /**
  * @author Hector Espert
+ * @author Olga Maciaszek-Sharma
  */
 @Configuration(proxyBeanMethods = false)
 @ConditionalOnWebApplication
@@ -54,41 +47,19 @@ import static org.springframework.hateoas.MediaTypes.HAL_JSON;
 @AutoConfigureAfter({ JacksonAutoConfiguration.class,
 		HttpMessageConvertersAutoConfiguration.class,
 		RepositoryRestMvcAutoConfiguration.class })
-@AutoConfigureBefore(HypermediaAutoConfiguration.class)
 public class FeignHalAutoConfiguration {
 
 	@Bean
+	@ConditionalOnBean(HalMediaTypeConfiguration.class)
 	@ConditionalOnMissingBean
 	public TypeConstrainedMappingJackson2HttpMessageConverter halJacksonHttpMessageConverter(
 			ObjectProvider<ObjectMapper> objectMapper,
-			ObjectProvider<HalConfiguration> halConfiguration,
+			HalMediaTypeConfiguration halConfiguration) {
-			ObjectProvider<MessageResolver> messageResolver,
-			ObjectProvider<CurieProvider> curieProvider,
-			ObjectProvider<LinkRelationProvider> linkRelationProvider) {
-
 		ObjectMapper mapper = objectMapper.getIfAvailable(ObjectMapper::new).copy();
-		mapper.disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES);
+		halConfiguration.configureObjectMapper(mapper);
-
-		HalConfiguration configuration = halConfiguration
-				.getIfAvailable(HalConfiguration::new);
-
-		CurieProvider curieProviderInstance = curieProvider
-				.getIfAvailable(() -> new DefaultCurieProvider(Collections.emptyMap()));
-
-		Jackson2HalModule.HalHandlerInstantiator halHandlerInstantiator = new Jackson2HalModule.HalHandlerInstantiator(
-				linkRelationProvider.getIfAvailable(), curieProviderInstance,
-				messageResolver.getIfAvailable(), configuration);
-
-		mapper.setHandlerInstantiator(halHandlerInstantiator);
-
-		if (!Jackson2HalModule.isAlreadyRegisteredIn(mapper)) {
-			Jackson2HalModule halModule = new Jackson2HalModule();
-			mapper.registerModule(halModule);
-		}
-
 		TypeConstrainedMappingJackson2HttpMessageConverter converter = new TypeConstrainedMappingJackson2HttpMessageConverter(
 				RepresentationModel.class);
-		converter.setSupportedMediaTypes(Arrays.asList(HAL_JSON));
+		converter.setSupportedMediaTypes(Collections.singletonList(HAL_JSON));
 		converter.setObjectMapper(mapper);
 		return converter;
 	}

spring-cloud-openfeign-core/src/main/java/org/springframework/cloud/openfeign/loadbalancer/DefaultFeignLoadBalancerConfiguration.java

@@ -16,12 +16,20 @@
 
 package org.springframework.cloud.openfeign.loadbalancer;
 
+import java.util.List;
+
 import feign.Client;
 
+import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
+import org.springframework.cloud.client.loadbalancer.LoadBalancedRetryFactory;
 import org.springframework.cloud.loadbalancer.blocking.client.BlockingLoadBalancerClient;
 import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Conditional;
 import org.springframework.context.annotation.Configuration;
+import org.springframework.core.annotation.AnnotationAwareOrderComparator;
 
 /**
  * Configuration instantiating a {@link BlockingLoadBalancerClient}-based {@link Client}
@@ -35,9 +43,24 @@ class DefaultFeignLoadBalancerConfiguration {
 
 	@Bean
 	@ConditionalOnMissingBean
+	@Conditional(OnRetryNotEnabledCondition.class)
 	public Client feignClient(BlockingLoadBalancerClient loadBalancerClient) {
 		return new FeignBlockingLoadBalancerClient(new Client.Default(null, null),
 				loadBalancerClient);
 	}
 
+	@Bean
+	@ConditionalOnMissingBean
+	@ConditionalOnClass(name = "org.springframework.retry.support.RetryTemplate")
+	@ConditionalOnBean(LoadBalancedRetryFactory.class)
+	@ConditionalOnProperty(value = "spring.cloud.loadbalancer.retry.enabled",
+			havingValue = "true", matchIfMissing = true)
+	public Client feignRetryClient(BlockingLoadBalancerClient loadBalancerClient,
+			List<LoadBalancedRetryFactory> loadBalancedRetryFactories) {
+		AnnotationAwareOrderComparator.sort(loadBalancedRetryFactories);
+		return new RetryableFeignBlockingLoadBalancerClient(
+				new Client.Default(null, null), loadBalancerClient,
+				loadBalancedRetryFactories.get(0));
+	}
+
 }

spring-cloud-openfeign-core/src/main/java/org/springframework/cloud/openfeign/loadbalancer/FeignBlockingLoadBalancerClient.java

@@ -72,12 +72,15 @@ public class FeignBlockingLoadBalancerClient implements Client {
 		}
 		String reconstructedUrl = loadBalancerClient.reconstructURI(instance, originalUri)
 				.toString();
-		Request newRequest = Request.create(request.httpMethod(), reconstructedUrl,
+		Request newRequest = buildRequest(request, reconstructedUrl);
-				request.headers(), request.body(), request.charset(),
-				request.requestTemplate());
 		return delegate.execute(newRequest, options);
 	}
 
+	protected Request buildRequest(Request request, String reconstructedUrl) {
+		return Request.create(request.httpMethod(), reconstructedUrl, request.headers(),
+				request.body(), request.charset(), request.requestTemplate());
+	}
+
 	// Visible for Sleuth instrumentation
 	public Client getDelegate() {
 		return delegate;

spring-cloud-openfeign-core/src/main/java/org/springframework/cloud/openfeign/loadbalancer/FeignLoadBalancerAutoConfiguration.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -38,6 +38,7 @@ import org.springframework.context.annotation.Import;
  * <code>spring.cloud.loadbalancer.ribbon.enabled</code> to <code>true</code>.
  *
  * @author Olga Maciaszek-Sharma
+ * @author Nguyen Ky Thanh
  * @since 2.2.0
  */
 @ConditionalOnClass(Feign.class)
@@ -51,6 +52,7 @@ import org.springframework.context.annotation.Import;
 // https://github.com/spring-cloud/spring-cloud-netflix/issues/2086#issuecomment-316281653
 @Import({ HttpClientFeignLoadBalancerConfiguration.class,
 		OkHttpFeignLoadBalancerConfiguration.class,
+		HttpClient5FeignLoadBalancerConfiguration.class,
 		DefaultFeignLoadBalancerConfiguration.class })
 public class FeignLoadBalancerAutoConfiguration {
 

spring-cloud-openfeign-core/src/main/java/org/springframework/cloud/openfeign/loadbalancer/HttpClient5FeignLoadBalancerConfiguration.java

@@ -0,0 +1,75 @@
+/*
+ * Copyright 2013-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.cloud.openfeign.loadbalancer;
+
+import java.util.List;
+
+import feign.Client;
+import feign.hc5.ApacheHttp5Client;
+import org.apache.hc.client5.http.classic.HttpClient;
+
+import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
+import org.springframework.cloud.client.loadbalancer.LoadBalancedRetryFactory;
+import org.springframework.cloud.loadbalancer.blocking.client.BlockingLoadBalancerClient;
+import org.springframework.cloud.openfeign.clientconfig.HttpClient5FeignConfiguration;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Conditional;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Import;
+import org.springframework.core.annotation.AnnotationAwareOrderComparator;
+
+/**
+ * Configuration instantiating a {@link BlockingLoadBalancerClient}-based {@link Client}
+ * object that uses {@link ApacheHttp5Client} under the hood.
+ *
+ * @author Nguyen Ky Thanh
+ */
+@Configuration(proxyBeanMethods = false)
+@ConditionalOnClass(ApacheHttp5Client.class)
+@ConditionalOnBean(BlockingLoadBalancerClient.class)
+@ConditionalOnProperty(value = "feign.httpclient.hc5.enabled", havingValue = "true")
+@Import(HttpClient5FeignConfiguration.class)
+class HttpClient5FeignLoadBalancerConfiguration {
+
+	@Bean
+	@ConditionalOnMissingBean
+	@Conditional(OnRetryNotEnabledCondition.class)
+	public Client feignClient(BlockingLoadBalancerClient loadBalancerClient,
+			HttpClient httpClient5) {
+		Client delegate = new ApacheHttp5Client(httpClient5);
+		return new FeignBlockingLoadBalancerClient(delegate, loadBalancerClient);
+	}
+
+	@Bean
+	@ConditionalOnMissingBean
+	@ConditionalOnClass(name = "org.springframework.retry.support.RetryTemplate")
+	@ConditionalOnBean(LoadBalancedRetryFactory.class)
+	@ConditionalOnProperty(value = "spring.cloud.loadbalancer.retry.enabled",
+			havingValue = "true", matchIfMissing = true)
+	public Client feignRetryClient(BlockingLoadBalancerClient loadBalancerClient,
+			HttpClient httpClient5,
+			List<LoadBalancedRetryFactory> loadBalancedRetryFactories) {
+		AnnotationAwareOrderComparator.sort(loadBalancedRetryFactories);
+		Client delegate = new ApacheHttp5Client(httpClient5);
+		return new RetryableFeignBlockingLoadBalancerClient(delegate, loadBalancerClient,
+				loadBalancedRetryFactories.get(0));
+	}
+
+}

spring-cloud-openfeign-core/src/main/java/org/springframework/cloud/openfeign/loadbalancer/HttpClientFeignLoadBalancerConfiguration.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,6 +16,8 @@
 
 package org.springframework.cloud.openfeign.loadbalancer;
 
+import java.util.List;
+
 import feign.Client;
 import feign.httpclient.ApacheHttpClient;
 import org.apache.http.client.HttpClient;
@@ -24,32 +26,54 @@ import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
+import org.springframework.cloud.client.loadbalancer.LoadBalancedRetryFactory;
 import org.springframework.cloud.loadbalancer.blocking.client.BlockingLoadBalancerClient;
+import org.springframework.cloud.openfeign.HttpClient5DisabledConditions;
 import org.springframework.cloud.openfeign.clientconfig.HttpClientFeignConfiguration;
 import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Conditional;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.Import;
+import org.springframework.core.annotation.AnnotationAwareOrderComparator;
 
 /**
  * Configuration instantiating a {@link BlockingLoadBalancerClient}-based {@link Client}
  * object that uses {@link ApacheHttpClient} under the hood.
  *
  * @author Olga Maciaszek-Sharma
+ * @author Nguyen Ky Thanh
  * @since 2.2.0
  */
 @Configuration(proxyBeanMethods = false)
 @ConditionalOnClass(ApacheHttpClient.class)
 @ConditionalOnBean(BlockingLoadBalancerClient.class)
 @ConditionalOnProperty(value = "feign.httpclient.enabled", matchIfMissing = true)
+@Conditional(HttpClient5DisabledConditions.class)
 @Import(HttpClientFeignConfiguration.class)
 class HttpClientFeignLoadBalancerConfiguration {
 
 	@Bean
 	@ConditionalOnMissingBean
+	@Conditional(OnRetryNotEnabledCondition.class)
 	public Client feignClient(BlockingLoadBalancerClient loadBalancerClient,
 			HttpClient httpClient) {
 		ApacheHttpClient delegate = new ApacheHttpClient(httpClient);
 		return new FeignBlockingLoadBalancerClient(delegate, loadBalancerClient);
 	}
 
+	@Bean
+	@ConditionalOnMissingBean
+	@ConditionalOnClass(name = "org.springframework.retry.support.RetryTemplate")
+	@ConditionalOnBean(LoadBalancedRetryFactory.class)
+	@ConditionalOnProperty(value = "spring.cloud.loadbalancer.retry.enabled",
+			havingValue = "true", matchIfMissing = true)
+	public Client feignRetryClient(BlockingLoadBalancerClient loadBalancerClient,
+			HttpClient httpClient,
+			List<LoadBalancedRetryFactory> loadBalancedRetryFactories) {
+		AnnotationAwareOrderComparator.sort(loadBalancedRetryFactories);
+		ApacheHttpClient delegate = new ApacheHttpClient(httpClient);
+		return new RetryableFeignBlockingLoadBalancerClient(delegate, loadBalancerClient,
+				loadBalancedRetryFactories.get(0));
+	}
+
 }

spring-cloud-openfeign-core/src/main/java/org/springframework/cloud/openfeign/loadbalancer/LoadBalancerResponseStatusCodeException.java

@@ -0,0 +1,50 @@
+/*
+ * Copyright 2013-2020 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.cloud.openfeign.loadbalancer;
+
+import java.io.ByteArrayInputStream;
+import java.net.URI;
+
+import feign.Response;
+
+import org.springframework.cloud.client.loadbalancer.RetryableStatusCodeException;
+
+/**
+ * A {@link RetryableStatusCodeException} for {@link Response}s.
+ *
+ * @author Ryan Baxter
+ */
+public class LoadBalancerResponseStatusCodeException
+		extends RetryableStatusCodeException {
+
+	private final Response response;
+
+	public LoadBalancerResponseStatusCodeException(String serviceId, Response response,
+			byte[] body, URI uri) {
+		super(serviceId, response.status(), response, uri);
+		this.response = Response.builder()
+				.body(new ByteArrayInputStream(body), body.length)
+				.headers(response.headers()).reason(response.reason())
+				.status(response.status()).request(response.request()).build();
+	}
+
+	@Override
+	public Response getResponse() {
+		return this.response;
+	}
+
+}

spring-cloud-openfeign-core/src/main/java/org/springframework/cloud/openfeign/loadbalancer/OkHttpFeignLoadBalancerConfiguration.java

@@ -16,6 +16,8 @@
 
 package org.springframework.cloud.openfeign.loadbalancer;
 
+import java.util.List;
+
 import feign.Client;
 import feign.okhttp.OkHttpClient;
 
@@ -23,11 +25,14 @@ import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
+import org.springframework.cloud.client.loadbalancer.LoadBalancedRetryFactory;
 import org.springframework.cloud.loadbalancer.blocking.client.BlockingLoadBalancerClient;
 import org.springframework.cloud.openfeign.clientconfig.OkHttpFeignConfiguration;
 import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Conditional;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.Import;
+import org.springframework.core.annotation.AnnotationAwareOrderComparator;
 
 /**
  * Configuration instantiating a {@link BlockingLoadBalancerClient}-based {@link Client}
@@ -45,10 +50,26 @@ class OkHttpFeignLoadBalancerConfiguration {
 
 	@Bean
 	@ConditionalOnMissingBean
+	@Conditional(OnRetryNotEnabledCondition.class)
 	public Client feignClient(okhttp3.OkHttpClient okHttpClient,
 			BlockingLoadBalancerClient loadBalancerClient) {
 		OkHttpClient delegate = new OkHttpClient(okHttpClient);
 		return new FeignBlockingLoadBalancerClient(delegate, loadBalancerClient);
 	}
 
+	@Bean
+	@ConditionalOnMissingBean
+	@ConditionalOnClass(name = "org.springframework.retry.support.RetryTemplate")
+	@ConditionalOnBean(LoadBalancedRetryFactory.class)
+	@ConditionalOnProperty(value = "spring.cloud.loadbalancer.retry.enabled",
+			havingValue = "true", matchIfMissing = true)
+	public Client feignRetryClient(BlockingLoadBalancerClient loadBalancerClient,
+			okhttp3.OkHttpClient okHttpClient,
+			List<LoadBalancedRetryFactory> loadBalancedRetryFactories) {
+		AnnotationAwareOrderComparator.sort(loadBalancedRetryFactories);
+		OkHttpClient delegate = new OkHttpClient(okHttpClient);
+		return new RetryableFeignBlockingLoadBalancerClient(delegate, loadBalancerClient,
+				loadBalancedRetryFactories.get(0));
+	}
+
 }

spring-cloud-openfeign-core/src/main/java/org/springframework/cloud/openfeign/loadbalancer/OnRetryNotEnabledCondition.java

@@ -0,0 +1,56 @@
+/*
+ * Copyright 2013-2020 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.cloud.openfeign.loadbalancer;
+
+import org.springframework.boot.autoconfigure.condition.AnyNestedCondition;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingClass;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
+import org.springframework.cloud.client.loadbalancer.LoadBalancedRetryFactory;
+import org.springframework.retry.support.RetryTemplate;
+
+/**
+ * A condition that verifies that {@link RetryTemplate} is on the classpath, a
+ * {@link LoadBalancedRetryFactory} bean is present and
+ * <code>spring.cloud.loadbalancer.retry.enabled</code> is not set to <code>false</code>.
+ *
+ * @author Olga Maciaszek-Sharma
+ * @since 2.2.6
+ */
+public class OnRetryNotEnabledCondition extends AnyNestedCondition {
+
+	public OnRetryNotEnabledCondition() {
+		super(ConfigurationPhase.REGISTER_BEAN);
+	}
+
+	@ConditionalOnMissingClass("org.springframework.retry.support.RetryTemplate")
+	static class OnNoRetryTemplateCondition {
+
+	}
+
+	@ConditionalOnMissingBean(LoadBalancedRetryFactory.class)
+	static class OnRetryFactoryCondition {
+
+	}
+
+	@ConditionalOnProperty(value = "spring.cloud.loadbalancer.retry.enabled",
+			havingValue = "false")
+	static class OnLoadBalancerRetryEnabledCondition {
+
+	}
+
+}

spring-cloud-openfeign-core/src/main/java/org/springframework/cloud/openfeign/loadbalancer/RetryableFeignBlockingLoadBalancerClient.java

@@ -0,0 +1,190 @@
+/*
+ * Copyright 2013-2020 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.cloud.openfeign.loadbalancer;
+
+import java.io.IOException;
+import java.net.URI;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import feign.Client;
+import feign.Request;
+import feign.Response;
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+
+import org.springframework.cloud.client.ServiceInstance;
+import org.springframework.cloud.client.loadbalancer.InterceptorRetryPolicy;
+import org.springframework.cloud.client.loadbalancer.LoadBalancedRecoveryCallback;
+import org.springframework.cloud.client.loadbalancer.LoadBalancedRetryContext;
+import org.springframework.cloud.client.loadbalancer.LoadBalancedRetryFactory;
+import org.springframework.cloud.client.loadbalancer.LoadBalancedRetryPolicy;
+import org.springframework.cloud.loadbalancer.blocking.client.BlockingLoadBalancerClient;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpMethod;
+import org.springframework.http.HttpRequest;
+import org.springframework.retry.RetryListener;
+import org.springframework.retry.backoff.BackOffPolicy;
+import org.springframework.retry.backoff.NoBackOffPolicy;
+import org.springframework.retry.policy.NeverRetryPolicy;
+import org.springframework.retry.support.RetryTemplate;
+import org.springframework.util.StreamUtils;
+
+/**
+ * A {@link Client} implementation that provides Spring Retry support for requests
+ * load-balanced with Spring Cloud LoadBalancer.
+ *
+ * @author Olga Maciaszek-Sharma
+ * @since 2.2.6
+ */
+public class RetryableFeignBlockingLoadBalancerClient implements Client {
+
+	private static final Log LOG = LogFactory
+			.getLog(FeignBlockingLoadBalancerClient.class);
+
+	private final Client delegate;
+
+	private final BlockingLoadBalancerClient loadBalancerClient;
+
+	private final LoadBalancedRetryFactory loadBalancedRetryFactory;
+
+	public RetryableFeignBlockingLoadBalancerClient(Client delegate,
+			BlockingLoadBalancerClient loadBalancerClient,
+			LoadBalancedRetryFactory loadBalancedRetryFactory) {
+		this.delegate = delegate;
+		this.loadBalancerClient = loadBalancerClient;
+		this.loadBalancedRetryFactory = loadBalancedRetryFactory;
+	}
+
+	@Override
+	public Response execute(Request request, Request.Options options) throws IOException {
+		final URI originalUri = URI.create(request.url());
+		String serviceId = originalUri.getHost();
+		final LoadBalancedRetryPolicy retryPolicy = loadBalancedRetryFactory
+				.createRetryPolicy(serviceId, loadBalancerClient);
+		RetryTemplate retryTemplate = buildRetryTemplate(serviceId, request, retryPolicy);
+		return retryTemplate.execute(context -> {
+			Request feignRequest = null;
+			// On retries the policy will choose the server and set it in the context
+			// and extract the server and update the request being made
+			if (context instanceof LoadBalancedRetryContext) {
+				ServiceInstance serviceInstance = ((LoadBalancedRetryContext) context)
+						.getServiceInstance();
+				if (serviceInstance != null) {
+					if (LOG.isDebugEnabled()) {
+						LOG.debug(String.format(
+								"Using service instance from LoadBalancedRetryContext: %s",
+								serviceInstance));
+					}
+					String reconstructedUrl = loadBalancerClient
+							.reconstructURI(serviceInstance, originalUri).toString();
+					feignRequest = buildRequest(request, reconstructedUrl);
+				}
+			}
+			if (feignRequest == null) {
+				if (LOG.isWarnEnabled()) {
+					LOG.warn(
+							"Service instance was not resolved, executing the original request");
+				}
+				feignRequest = request;
+			}
+			Response response = delegate.execute(feignRequest, options);
+			int responseStatus = response.status();
+			if (retryPolicy != null && retryPolicy.retryableStatusCode(responseStatus)) {
+				if (LOG.isDebugEnabled()) {
+					LOG.debug(
+							String.format("Retrying on status code: %d", responseStatus));
+				}
+				byte[] byteArray = response.body() == null ? new byte[] {}
+						: StreamUtils.copyToByteArray(response.body().asInputStream());
+				response.close();
+				throw new LoadBalancerResponseStatusCodeException(serviceId, response,
+						byteArray, URI.create(request.url()));
+			}
+			return response;
+		}, new LoadBalancedRecoveryCallback<Response, Response>() {
+			@Override
+			protected Response createResponse(Response response, URI uri) {
+				return response;
+			}
+		});
+	}
+
+	protected Request buildRequest(Request request, String reconstructedUrl) {
+		return Request.create(request.httpMethod(), reconstructedUrl, request.headers(),
+				request.body(), request.charset(), request.requestTemplate());
+	}
+
+	private RetryTemplate buildRetryTemplate(String serviceId, Request request,
+			LoadBalancedRetryPolicy retryPolicy) {
+		RetryTemplate retryTemplate = new RetryTemplate();
+		BackOffPolicy backOffPolicy = this.loadBalancedRetryFactory
+				.createBackOffPolicy(serviceId);
+		retryTemplate.setBackOffPolicy(
+				backOffPolicy == null ? new NoBackOffPolicy() : backOffPolicy);
+		RetryListener[] retryListeners = this.loadBalancedRetryFactory
+				.createRetryListeners(serviceId);
+		if (retryListeners != null && retryListeners.length != 0) {
+			retryTemplate.setListeners(retryListeners);
+		}
+
+		retryTemplate.setRetryPolicy(retryPolicy == null ? new NeverRetryPolicy()
+				: new InterceptorRetryPolicy(toHttpRequest(request), retryPolicy,
+						loadBalancerClient, serviceId));
+		return retryTemplate;
+	}
+
+	// Visible for Sleuth instrumentation
+	public Client getDelegate() {
+		return delegate;
+	}
+
+	private HttpRequest toHttpRequest(Request request) {
+		return new HttpRequest() {
+			@Override
+			public HttpMethod getMethod() {
+				return HttpMethod.resolve(request.httpMethod().name());
+			}
+
+			@Override
+			public String getMethodValue() {
+				return getMethod().name();
+			}
+
+			@Override
+			public URI getURI() {
+				return URI.create(request.url());
+			}
+
+			@Override
+			public HttpHeaders getHeaders() {
+				Map<String, List<String>> headers = new HashMap<>();
+				Map<String, Collection<String>> feignHeaders = request.headers();
+				for (String key : feignHeaders.keySet()) {
+					headers.put(key, new ArrayList<>(feignHeaders.get(key)));
+				}
+				HttpHeaders httpHeaders = new HttpHeaders();
+				httpHeaders.putAll(headers);
+				return httpHeaders;
+			}
+		};
+	}
+
+}

spring-cloud-openfeign-core/src/main/java/org/springframework/cloud/openfeign/ribbon/FeignLoadBalancer.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -24,9 +24,9 @@ import java.util.HashMap;
 import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.concurrent.TimeUnit;
 
 import com.netflix.client.AbstractLoadBalancerAwareClient;
-import com.netflix.client.ClientException;
 import com.netflix.client.ClientRequest;
 import com.netflix.client.IResponse;
 import com.netflix.client.RequestSpecificRetryHandler;
@@ -66,16 +66,19 @@ public class FeignLoadBalancer extends
 
 	protected ServerIntrospector serverIntrospector;
 
+	protected boolean followRedirects;
+
 	public FeignLoadBalancer(ILoadBalancer lb, IClientConfig clientConfig,
 			ServerIntrospector serverIntrospector) {
 		super(lb, clientConfig);
-		this.setRetryHandler(RetryHandler.DEFAULT);
+		setRetryHandler(RetryHandler.DEFAULT);
 		this.clientConfig = clientConfig;
 		this.ribbon = RibbonProperties.from(clientConfig);
 		RibbonProperties ribbon = this.ribbon;
-		this.connectTimeout = ribbon.getConnectTimeout();
+		connectTimeout = ribbon.getConnectTimeout();
-		this.readTimeout = ribbon.getReadTimeout();
+		readTimeout = ribbon.getReadTimeout();
 		this.serverIntrospector = serverIntrospector;
+		followRedirects = ribbon.isFollowRedirects();
 	}
 
 	@Override
@@ -84,11 +87,13 @@ public class FeignLoadBalancer extends
 		Request.Options options;
 		if (configOverride != null) {
 			RibbonProperties override = RibbonProperties.from(configOverride);
-			options = new Request.Options(override.connectTimeout(this.connectTimeout),
+			options = new Request.Options(override.connectTimeout(connectTimeout),
-					override.readTimeout(this.readTimeout));
+					TimeUnit.MILLISECONDS, override.readTimeout(readTimeout),
+					TimeUnit.MILLISECONDS, override.isFollowRedirects(followRedirects));
 		}
 		else {
-			options = new Request.Options(this.connectTimeout, this.readTimeout);
+			options = new Request.Options(connectTimeout, TimeUnit.MILLISECONDS,
+					readTimeout, TimeUnit.MILLISECONDS, followRedirects);
 		}
 		Response response = request.client().execute(request.toRequest(), options);
 		return new RibbonResponse(request.getUri(), response);
@@ -97,24 +102,24 @@ public class FeignLoadBalancer extends
 	@Override
 	public RequestSpecificRetryHandler getRequestSpecificRetryHandler(
 			RibbonRequest request, IClientConfig requestConfig) {
-		if (this.ribbon.isOkToRetryOnAllOperations()) {
+		if (ribbon.isOkToRetryOnAllOperations()) {
-			return new RequestSpecificRetryHandler(true, true, this.getRetryHandler(),
+			return new RequestSpecificRetryHandler(true, true, getRetryHandler(),
 					requestConfig);
 		}
 		if (!request.toRequest().httpMethod().name().equals("GET")) {
-			return new RequestSpecificRetryHandler(true, false, this.getRetryHandler(),
+			return new RequestSpecificRetryHandler(true, false, getRetryHandler(),
 					requestConfig);
 		}
 		else {
-			return new RequestSpecificRetryHandler(true, true, this.getRetryHandler(),
+			return new RequestSpecificRetryHandler(true, true, getRetryHandler(),
 					requestConfig);
 		}
 	}
 
 	@Override
 	public URI reconstructURIWithServer(Server server, URI original) {
-		URI uri = updateToSecureConnectionIfNeeded(original, this.clientConfig,
+		URI uri = updateToSecureConnectionIfNeeded(original, clientConfig,
-				this.serverIntrospector, server);
+				serverIntrospector, server);
 		return super.reconstructURIWithServer(server, uri);
 	}
 
@@ -138,11 +143,11 @@ public class FeignLoadBalancer extends
 		}
 
 		Request toRequest() {
-			return toRequest(this.request);
+			return toRequest(request);
 		}
 
 		Client client() {
-			return this.client;
+			return client;
 		}
 
 		HttpRequest toHttpRequest() {
@@ -169,7 +174,7 @@ public class FeignLoadBalancer extends
 					Map<String, Collection<String>> feignHeaders = RibbonRequest.this
 							.toRequest().headers();
 					for (String key : feignHeaders.keySet()) {
-						headers.put(key, new ArrayList<String>(feignHeaders.get(key)));
+						headers.put(key, new ArrayList<>(feignHeaders.get(key)));
 					}
 					HttpHeaders httpHeaders = new HttpHeaders();
 					httpHeaders.putAll(headers);
@@ -180,16 +185,16 @@ public class FeignLoadBalancer extends
 		}
 
 		public Request getRequest() {
-			return this.request;
+			return request;
 		}
 
 		public Client getClient() {
-			return this.client;
+			return client;
 		}
 
 		@Override
 		public Object clone() {
-			return new RibbonRequest(this.client, this.request, getUri());
+			return new RibbonRequest(client, request, getUri());
 		}
 
 	}
@@ -206,38 +211,38 @@ public class FeignLoadBalancer extends
 		}
 
 		@Override
-		public Object getPayload() throws ClientException {
+		public Object getPayload() {
-			return this.response.body();
+			return response.body();
 		}
 
 		@Override
 		public boolean hasPayload() {
-			return this.response.body() != null;
+			return response.body() != null;
 		}
 
 		@Override
 		public boolean isSuccess() {
-			return this.response.status() == 200;
+			return response.status() == 200;
 		}
 
 		@Override
 		public URI getRequestedURI() {
-			return this.uri;
+			return uri;
 		}
 
 		@Override
 		public Map<String, Collection<String>> getHeaders() {
-			return this.response.headers();
+			return response.headers();
 		}
 
 		Response toResponse() {
-			return this.response;
+			return response;
 		}
 
 		@Override
 		public void close() throws IOException {
-			if (this.response != null && this.response.body() != null) {
+			if (response != null && response.body() != null) {
-				this.response.body().close();
+				response.body().close();
 			}
 		}
 

spring-cloud-openfeign-core/src/main/java/org/springframework/cloud/openfeign/ribbon/FeignRibbonClientAutoConfiguration.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -41,6 +41,7 @@ import org.springframework.context.annotation.Primary;
  *
  * @author Dave Syer
  * @author Olga Maciaszek-Sharma
+ * @author Nguyen Ky Thanh
  */
 @ConditionalOnClass({ ILoadBalancer.class, Feign.class })
 @ConditionalOnProperty(value = "spring.cloud.loadbalancer.ribbon.enabled",
@@ -53,6 +54,7 @@ import org.springframework.context.annotation.Primary;
 // https://github.com/spring-cloud/spring-cloud-netflix/issues/2086#issuecomment-316281653
 @Import({ HttpClientFeignLoadBalancedConfiguration.class,
 		OkHttpFeignLoadBalancedConfiguration.class,
+		HttpClient5FeignLoadBalancedConfiguration.class,
 		DefaultFeignLoadBalancedConfiguration.class })
 public class FeignRibbonClientAutoConfiguration {
 

spring-cloud-openfeign-core/src/main/java/org/springframework/cloud/openfeign/ribbon/HttpClient5FeignLoadBalancedConfiguration.java

@@ -0,0 +1,52 @@
+/*
+ * Copyright 2013-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.cloud.openfeign.ribbon;
+
+import feign.Client;
+import feign.hc5.ApacheHttp5Client;
+import org.apache.hc.client5.http.classic.HttpClient;
+
+import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
+import org.springframework.cloud.netflix.ribbon.SpringClientFactory;
+import org.springframework.cloud.openfeign.clientconfig.HttpClient5FeignConfiguration;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Import;
+
+/**
+ * Configuration instantiating a {@link LoadBalancerFeignClient}-based {@link Client}
+ * object that uses {@link ApacheHttp5Client} under the hood.
+ *
+ * @author Nguyen Ky Thanh
+ */
+@Configuration(proxyBeanMethods = false)
+@ConditionalOnClass(ApacheHttp5Client.class)
+@ConditionalOnProperty(value = "feign.httpclient.hc5.enabled", havingValue = "true")
+@Import(HttpClient5FeignConfiguration.class)
+class HttpClient5FeignLoadBalancedConfiguration {
+
+	@Bean
+	@ConditionalOnMissingBean(Client.class)
+	public Client feignClient(CachingSpringLoadBalancerFactory cachingFactory,
+			SpringClientFactory clientFactory, HttpClient httpClient5) {
+		Client delegate = new ApacheHttp5Client(httpClient5);
+		return new LoadBalancerFeignClient(delegate, cachingFactory, clientFactory);
+	}
+
+}

spring-cloud-openfeign-core/src/main/java/org/springframework/cloud/openfeign/ribbon/HttpClientFeignLoadBalancedConfiguration.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -24,18 +24,22 @@ import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.cloud.netflix.ribbon.SpringClientFactory;
+import org.springframework.cloud.openfeign.HttpClient5DisabledConditions;
 import org.springframework.cloud.openfeign.clientconfig.HttpClientFeignConfiguration;
 import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Conditional;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.Import;
 
 /**
  * @author Spencer Gibb
  * @author Olga Maciaszek-Sharma
+ * @author Nguyen Ky Thanh
  */
 @Configuration(proxyBeanMethods = false)
 @ConditionalOnClass(ApacheHttpClient.class)
 @ConditionalOnProperty(value = "feign.httpclient.enabled", matchIfMissing = true)
+@Conditional(HttpClient5DisabledConditions.class)
 @Import(HttpClientFeignConfiguration.class)
 class HttpClientFeignLoadBalancedConfiguration {
 

spring-cloud-openfeign-core/src/main/java/org/springframework/cloud/openfeign/ribbon/LoadBalancerFeignClient.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -31,6 +31,7 @@ import org.springframework.cloud.netflix.ribbon.SpringClientFactory;
 
 /**
  * @author Dave Syer
+ * @author Olga Maciaszek-Sharma
  *
  */
 public class LoadBalancerFeignClient implements Client {
@@ -126,6 +127,8 @@ public class LoadBalancerFeignClient implements Client {
 			setProperty(CommonClientConfigKey.ConnectTimeout,
 					options.connectTimeoutMillis());
 			setProperty(CommonClientConfigKey.ReadTimeout, options.readTimeoutMillis());
+			setProperty(CommonClientConfigKey.FollowRedirects,
+					options.isFollowRedirects());
 		}
 
 		@Override

spring-cloud-openfeign-core/src/main/java/org/springframework/cloud/openfeign/ribbon/RetryableFeignLoadBalancer.java

@@ -36,8 +36,6 @@ import org.springframework.cloud.client.loadbalancer.ServiceInstanceChooser;
 import org.springframework.cloud.netflix.ribbon.RibbonLoadBalancerClient;
 import org.springframework.cloud.netflix.ribbon.RibbonProperties;
 import org.springframework.cloud.netflix.ribbon.ServerIntrospector;
-import org.springframework.retry.RetryCallback;
-import org.springframework.retry.RetryContext;
 import org.springframework.retry.RetryListener;
 import org.springframework.retry.backoff.BackOffPolicy;
 import org.springframework.retry.backoff.NoBackOffPolicy;
@@ -91,39 +89,34 @@ public class RetryableFeignLoadBalancer extends FeignLoadBalancer
 		retryTemplate.setRetryPolicy(retryPolicy == null ? new NeverRetryPolicy()
 				: new FeignRetryPolicy(request.toHttpRequest(), retryPolicy, this,
 						this.getClientName()));
-		return retryTemplate.execute(new RetryCallback<RibbonResponse, IOException>() {
+		return retryTemplate.execute(retryContext -> {
-			@Override
+			Request feignRequest = null;
-			public RibbonResponse doWithRetry(RetryContext retryContext)
+			// on retries the policy will choose the server and set it in the context
-					throws IOException {
+			// extract the server and update the request being made
-				Request feignRequest = null;
+			if (retryContext instanceof LoadBalancedRetryContext) {
-				// on retries the policy will choose the server and set it in the context
+				ServiceInstance service = ((LoadBalancedRetryContext) retryContext)
-				// extract the server and update the request being made
+						.getServiceInstance();
-				if (retryContext instanceof LoadBalancedRetryContext) {
+				if (service != null) {
-					ServiceInstance service = ((LoadBalancedRetryContext) retryContext)
+					feignRequest = ((RibbonRequest) request
-							.getServiceInstance();
+							.replaceUri(reconstructURIWithServer(
-					if (service != null) {
+									new Server(service.getHost(), service.getPort()),
-						feignRequest = ((RibbonRequest) request
+									request.getUri()))).toRequest();
-								.replaceUri(reconstructURIWithServer(
-										new Server(service.getHost(), service.getPort()),
-										request.getUri()))).toRequest();
-					}
 				}
-				if (feignRequest == null) {
-					feignRequest = request.toRequest();
-				}
-				Response response = request.client().execute(feignRequest, options);
-				if (retryPolicy != null
-						&& retryPolicy.retryableStatusCode(response.status())) {
-					byte[] byteArray = response.body() == null ? new byte[] {}
-							: StreamUtils
-									.copyToByteArray(response.body().asInputStream());
-					response.close();
-					throw new RibbonResponseStatusCodeException(
-							RetryableFeignLoadBalancer.this.clientName, response,
-							byteArray, request.getUri());
-				}
-				return new RibbonResponse(request.getUri(), response);
 			}
+			if (feignRequest == null) {
+				feignRequest = request.toRequest();
+			}
+			Response response = request.client().execute(feignRequest, options);
+			if (retryPolicy != null
+					&& retryPolicy.retryableStatusCode(response.status())) {
+				byte[] byteArray = response.body() == null ? new byte[] {}
+						: StreamUtils.copyToByteArray(response.body().asInputStream());
+				response.close();
+				throw new RibbonResponseStatusCodeException(
+						RetryableFeignLoadBalancer.this.clientName, response, byteArray,
+						request.getUri());
+			}
+			return new RibbonResponse(request.getUri(), response);
 		}, new LoadBalancedRecoveryCallback<RibbonResponse, Response>() {
 			@Override
 			protected RibbonResponse createResponse(Response response, URI uri) {

spring-cloud-openfeign-core/src/main/java/org/springframework/cloud/openfeign/support/FeignEncoderProperties.java

@@ -0,0 +1,44 @@
+/*
+ * Copyright 2013-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.cloud.openfeign.support;
+
+import org.springframework.boot.context.properties.ConfigurationProperties;
+
+/**
+ * Properties for {@link SpringEncoder}.
+ *
+ * @author Olga Maciaszek-Sharma
+ * @since 2.2.8
+ */
+@ConfigurationProperties("feign.encoder")
+public class FeignEncoderProperties {
+
+	/**
+	 * Indicates whether the charset should be derived from the {@code Content-Type}
+	 * header.
+	 */
+	private boolean charsetFromContentType = false;
+
+	public boolean isCharsetFromContentType() {
+		return charsetFromContentType;
+	}
+
+	public void setCharsetFromContentType(boolean charsetFromContentType) {
+		this.charsetFromContentType = charsetFromContentType;
+	}
+
+}

spring-cloud-openfeign-core/src/main/java/org/springframework/cloud/openfeign/support/FeignHttpClientProperties.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -22,6 +22,7 @@ import org.springframework.boot.context.properties.ConfigurationProperties;
 
 /**
  * @author Ryan Baxter
+ * @author Nguyen Ky Thanh
  */
 @ConfigurationProperties(prefix = "feign.httpclient")
 public class FeignHttpClientProperties {
@@ -82,6 +83,11 @@ public class FeignHttpClientProperties {
 
 	private int connectionTimerRepeat = DEFAULT_CONNECTION_TIMER_REPEAT;
 
+	/**
+	 * Apache HttpClient5 additional properties.
+	 */
+	private Hc5Properties hc5 = new Hc5Properties();
+
 	public int getConnectionTimerRepeat() {
 		return this.connectionTimerRepeat;
 	}
@@ -146,4 +152,125 @@ public class FeignHttpClientProperties {
 		this.connectionTimeout = connectionTimeout;
 	}
 
+	public Hc5Properties getHc5() {
+		return hc5;
+	}
+
+	public void setHc5(Hc5Properties hc5) {
+		this.hc5 = hc5;
+	}
+
+	public static class Hc5Properties {
+
+		/**
+		 * Default value for pool concurrency policy.
+		 */
+		public static final PoolConcurrencyPolicy DEFAULT_POOL_CONCURRENCY_POLICY = PoolConcurrencyPolicy.STRICT;
+
+		/**
+		 * Default value for pool reuse policy.
+		 */
+		public static final PoolReusePolicy DEFAULT_POOL_REUSE_POLICY = PoolReusePolicy.FIFO;
+
+		/**
+		 * Default value for socket timeout.
+		 */
+		public static final int DEFAULT_SOCKET_TIMEOUT = 5;
+
+		/**
+		 * Default value for socket timeout unit.
+		 */
+		public static final TimeUnit DEFAULT_SOCKET_TIMEOUT_UNIT = TimeUnit.SECONDS;
+
+		/**
+		 * Pool concurrency policies.
+		 */
+		private PoolConcurrencyPolicy poolConcurrencyPolicy = DEFAULT_POOL_CONCURRENCY_POLICY;
+
+		/**
+		 * Pool connection re-use policies.
+		 */
+		private PoolReusePolicy poolReusePolicy = DEFAULT_POOL_REUSE_POLICY;
+
+		/**
+		 * Default value for socket timeout.
+		 */
+		private int socketTimeout = DEFAULT_SOCKET_TIMEOUT;
+
+		/**
+		 * Default value for socket timeout unit.
+		 */
+		private TimeUnit socketTimeoutUnit = DEFAULT_SOCKET_TIMEOUT_UNIT;
+
+		public PoolConcurrencyPolicy getPoolConcurrencyPolicy() {
+			return this.poolConcurrencyPolicy;
+		}
+
+		public void setPoolConcurrencyPolicy(
+				PoolConcurrencyPolicy poolConcurrencyPolicy) {
+			this.poolConcurrencyPolicy = poolConcurrencyPolicy;
+		}
+
+		public PoolReusePolicy getPoolReusePolicy() {
+			return poolReusePolicy;
+		}
+
+		public void setPoolReusePolicy(PoolReusePolicy poolReusePolicy) {
+			this.poolReusePolicy = poolReusePolicy;
+		}
+
+		public TimeUnit getSocketTimeoutUnit() {
+			return socketTimeoutUnit;
+		}
+
+		public void setSocketTimeoutUnit(TimeUnit socketTimeoutUnit) {
+			this.socketTimeoutUnit = socketTimeoutUnit;
+		}
+
+		public int getSocketTimeout() {
+			return socketTimeout;
+		}
+
+		public void setSocketTimeout(int socketTimeout) {
+			this.socketTimeout = socketTimeout;
+		}
+
+		/**
+		 * Enumeration of pool concurrency policies.
+		 */
+		public enum PoolConcurrencyPolicy {
+
+			/**
+			 * Higher concurrency but with lax connection max limit guarantees.
+			 */
+			LAX,
+
+			/**
+			 * Strict connection max limit guarantees.
+			 */
+			STRICT
+
+		}
+
+		/**
+		 * Enumeration of pooled connection re-use policies.
+		 */
+		public enum PoolReusePolicy {
+
+			/**
+			 * Re-use as few connections as possible making it possible for connections to
+			 * become idle and expire.
+			 */
+			LIFO,
+
+			/**
+			 * Re-use all connections equally preventing them from becoming idle and
+			 * expiring.
+			 */
+			FIFO
+
+		}
+
+	}
+
 }

spring-cloud-openfeign-core/src/main/java/org/springframework/cloud/openfeign/support/PageJacksonModule.java

@@ -20,6 +20,7 @@ import java.util.Iterator;
 import java.util.List;
 import java.util.function.Function;
 
+import com.fasterxml.jackson.annotation.JsonAlias;
 import com.fasterxml.jackson.annotation.JsonIgnore;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.core.Version;
@@ -36,6 +37,7 @@ import org.springframework.data.domain.Sort;
  * This Jackson module provides support to deserialize Spring {@link Page} objects.
  *
  * @author Pascal Büttiker
+ * @author Olga Maciaszek-Sharma
  */
 public class PageJacksonModule extends Module {
 
@@ -65,7 +67,9 @@ public class PageJacksonModule extends Module {
 
 		SimplePageImpl(@JsonProperty("content") List<T> content,
 				@JsonProperty("number") int number, @JsonProperty("size") int size,
-				@JsonProperty("totalElements") long totalElements,
+				@JsonProperty("totalElements") @JsonAlias({ "total-elements",
+						"total_elements", "totalelements",
+						"TotalElements" }) long totalElements,
 				@JsonProperty("sort") Sort sort) {
 			PageRequest pageRequest;
 			if (sort != null) {

spring-cloud-openfeign-core/src/main/java/org/springframework/cloud/openfeign/support/PageableSpringEncoder.java

@@ -120,7 +120,7 @@ public class PageableSpringEncoder implements Encoder {
 			}
 		}
 		for (Sort.Order order : sort) {
-			sortQueries.add(order.getProperty() + "," + order.getDirection());
+			sortQueries.add(order.getProperty() + "%2C" + order.getDirection());
 		}
 		if (!sortQueries.isEmpty()) {
 			template.query(sortParameter, sortQueries);

spring-cloud-openfeign-core/src/main/java/org/springframework/cloud/openfeign/support/PageableSpringQueryMapEncoder.java

@@ -0,0 +1,80 @@
+/*
+ * Copyright 2013-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.cloud.openfeign.support;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import feign.querymap.BeanQueryMapEncoder;
+
+import org.springframework.data.domain.Pageable;
+import org.springframework.data.domain.Sort;
+
+/**
+ * Provides support for encoding Pageable annotated as
+ * {@link org.springframework.cloud.openfeign.SpringQueryMap}.
+ *
+ * @author Hyeonmin Park
+ * @since 2.2.8
+ */
+public class PageableSpringQueryMapEncoder extends BeanQueryMapEncoder {
+
+	@Override
+	public Map<String, Object> encode(Object object) {
+		if (supports(object)) {
+			Map<String, Object> queryMap = new HashMap<>();
+
+			if (object instanceof Pageable) {
+				Pageable pageable = (Pageable) object;
+
+				if (pageable.isPaged()) {
+					queryMap.put("page", pageable.getPageNumber());
+					queryMap.put("size", pageable.getPageSize());
+				}
+
+				if (pageable.getSort() != null) {
+					applySort(queryMap, pageable.getSort());
+				}
+			}
+			else if (object instanceof Sort) {
+				Sort sort = (Sort) object;
+				applySort(queryMap, sort);
+			}
+			return queryMap;
+		}
+		else {
+			return super.encode(object);
+		}
+	}
+
+	private void applySort(Map<String, Object> queryMap, Sort sort) {
+		List<String> sortQueries = new ArrayList<>();
+		for (Sort.Order order : sort) {
+			sortQueries.add(order.getProperty() + "%2C" + order.getDirection());
+		}
+		if (!sortQueries.isEmpty()) {
+			queryMap.put("sort", sortQueries);
+		}
+	}
+
+	protected boolean supports(Object object) {
+		return object instanceof Pageable || object instanceof Sort;
+	}
+
+}

spring-cloud-openfeign-core/src/main/java/org/springframework/cloud/openfeign/support/ResponseEntityDecoder.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -26,16 +26,16 @@ import feign.Response;
 import feign.codec.Decoder;
 
 import org.springframework.http.HttpEntity;
+import org.springframework.http.HttpHeaders;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
-import org.springframework.util.LinkedMultiValueMap;
-import org.springframework.util.MultiValueMap;
 
 /**
  * Decoder adds compatibility for Spring MVC's ResponseEntity to any other decoder via
  * composition.
  *
  * @author chad jaros
+ * @author Olga Maciaszek-Sharma
  */
 public class ResponseEntityDecoder implements Decoder {
 
@@ -81,7 +81,7 @@ public class ResponseEntityDecoder implements Decoder {
 	@SuppressWarnings("unchecked")
 	private <T> ResponseEntity<T> createResponse(Object instance, Response response) {
 
-		MultiValueMap<String, String> headers = new LinkedMultiValueMap<>();
+		HttpHeaders headers = new HttpHeaders();
 		for (String key : response.headers().keySet()) {
 			headers.put(key, new LinkedList<>(response.headers().get(key)));
 		}

spring-cloud-openfeign-core/src/main/java/org/springframework/cloud/openfeign/support/SpringEncoder.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -22,10 +22,11 @@ import java.io.OutputStream;
 import java.lang.reflect.Type;
 import java.nio.charset.Charset;
 import java.nio.charset.StandardCharsets;
+import java.util.Arrays;
 import java.util.Collection;
 import java.util.Objects;
+import java.util.stream.Stream;
 
-import feign.Request;
 import feign.RequestTemplate;
 import feign.codec.EncodeException;
 import feign.codec.Encoder;
@@ -48,6 +49,10 @@ import org.springframework.web.multipart.MultipartFile;
 
 import static org.springframework.cloud.openfeign.support.FeignUtils.getHeaders;
 import static org.springframework.cloud.openfeign.support.FeignUtils.getHttpHeaders;
+import static org.springframework.http.MediaType.APPLICATION_FORM_URLENCODED;
+import static org.springframework.http.MediaType.MULTIPART_FORM_DATA;
+import static org.springframework.http.MediaType.MULTIPART_MIXED;
+import static org.springframework.http.MediaType.MULTIPART_RELATED;
 
 /**
  * @author Spencer Gibb
@@ -55,7 +60,10 @@ import static org.springframework.cloud.openfeign.support.FeignUtils.getHttpHead
  * @author Ahmad Mozafarnia
  * @author Aaron Whiteside
  * @author Darren Foong
+ * @author Olga Maciaszek-Sharma
+ * @author Can Bezmen
  */
+@SuppressWarnings("rawtypes")
 public class SpringEncoder implements Encoder {
 
 	private static final Log log = LogFactory.getLog(SpringEncoder.class);
@@ -64,15 +72,23 @@ public class SpringEncoder implements Encoder {
 
 	private final ObjectFactory<HttpMessageConverters> messageConverters;
 
+	private final FeignEncoderProperties encoderProperties;
+
 	public SpringEncoder(ObjectFactory<HttpMessageConverters> messageConverters) {
-		this.springFormEncoder = new SpringFormEncoder();
+		this(new SpringFormEncoder(), messageConverters);
-		this.messageConverters = messageConverters;
 	}
 
 	public SpringEncoder(SpringFormEncoder springFormEncoder,
 			ObjectFactory<HttpMessageConverters> messageConverters) {
+		this(springFormEncoder, messageConverters, new FeignEncoderProperties());
+	}
+
+	public SpringEncoder(SpringFormEncoder springFormEncoder,
+			ObjectFactory<HttpMessageConverters> messageConverters,
+			FeignEncoderProperties encoderProperties) {
 		this.springFormEncoder = springFormEncoder;
 		this.messageConverters = messageConverters;
+		this.encoderProperties = encoderProperties;
 	}
 
 	@Override
@@ -89,8 +105,8 @@ public class SpringEncoder implements Encoder {
 				requestContentType = MediaType.valueOf(type);
 			}
 
-			if (Objects.equals(requestContentType, MediaType.MULTIPART_FORM_DATA)) {
+			if (isFormRelatedContentType(requestContentType)) {
-				this.springFormEncoder.encode(requestBody, bodyType, request);
+				springFormEncoder.encode(requestBody, bodyType, request);
 				return;
 			}
 			else {
@@ -100,58 +116,76 @@ public class SpringEncoder implements Encoder {
 									+ "should be specified as MediaType.MULTIPART_FORM_DATA_VALUE");
 				}
 			}
-
+			encodeWithMessageConverter(requestBody, bodyType, request,
-			for (HttpMessageConverter messageConverter : this.messageConverters
+					requestContentType);
-					.getObject().getConverters()) {
-				FeignOutputMessage outputMessage;
-				try {
-					if (messageConverter instanceof GenericHttpMessageConverter) {
-						outputMessage = checkAndWrite(requestBody, bodyType,
-								requestContentType,
-								(GenericHttpMessageConverter) messageConverter, request);
-					}
-					else {
-						outputMessage = checkAndWrite(requestBody, requestContentType,
-								messageConverter, request);
-					}
-				}
-				catch (IOException | HttpMessageConversionException ex) {
-					throw new EncodeException("Error converting request body", ex);
-				}
-				if (outputMessage != null) {
-					// clear headers
-					request.headers(null);
-					// converters can modify headers, so update the request
-					// with the modified headers
-					request.headers(getHeaders(outputMessage.getHeaders()));
-
-					// do not use charset for binary data and protobuf
-					Charset charset;
-					if (messageConverter instanceof ByteArrayHttpMessageConverter) {
-						charset = null;
-					}
-					else if (messageConverter instanceof ProtobufHttpMessageConverter
-							&& ProtobufHttpMessageConverter.PROTOBUF.isCompatibleWith(
-									outputMessage.getHeaders().getContentType())) {
-						charset = null;
-					}
-					else {
-						charset = StandardCharsets.UTF_8;
-					}
-					request.body(Request.Body.encoded(
-							outputMessage.getOutputStream().toByteArray(), charset));
-					return;
-				}
-			}
-			String message = "Could not write request: no suitable HttpMessageConverter "
-					+ "found for request type [" + requestBody.getClass().getName() + "]";
-			if (requestContentType != null) {
-				message += " and content type [" + requestContentType + "]";
-			}
-			throw new EncodeException(message);
 		}
 	}
 
+	private void encodeWithMessageConverter(Object requestBody, Type bodyType,
+			RequestTemplate request, MediaType requestContentType) {
+		for (HttpMessageConverter messageConverter : messageConverters.getObject()
+				.getConverters()) {
+			FeignOutputMessage outputMessage;
+			try {
+				if (messageConverter instanceof GenericHttpMessageConverter) {
+					outputMessage = checkAndWrite(requestBody, bodyType,
+							requestContentType,
+							(GenericHttpMessageConverter) messageConverter, request);
+				}
+				else {
+					outputMessage = checkAndWrite(requestBody, requestContentType,
+							messageConverter, request);
+				}
+			}
+			catch (IOException | HttpMessageConversionException ex) {
+				throw new EncodeException("Error converting request body", ex);
+			}
+			if (outputMessage != null) {
+				// clear headers
+				request.headers(null);
+				// converters can modify headers, so update the request
+				// with the modified headers
+				request.headers(getHeaders(outputMessage.getHeaders()));
+
+				// do not use charset for binary data and protobuf
+				Charset charset;
+
+				MediaType contentType = outputMessage.getHeaders().getContentType();
+				Charset charsetFromContentType = contentType != null
+						? contentType.getCharset() : null;
+
+				if (encoderProperties != null
+						&& encoderProperties.isCharsetFromContentType()
+						&& charsetFromContentType != null) {
+					charset = charsetFromContentType;
+				}
+				else if (shouldHaveNullCharset(messageConverter, outputMessage)) {
+					charset = null;
+				}
+				else {
+					charset = StandardCharsets.UTF_8;
+				}
+				request.body(outputMessage.getOutputStream().toByteArray(), charset);
+				return;
+			}
+		}
+		String message = "Could not write request: no suitable HttpMessageConverter "
+				+ "found for request type [" + requestBody.getClass().getName() + "]";
+		if (requestContentType != null) {
+			message += " and content type [" + requestContentType + "]";
+		}
+		throw new EncodeException(message);
+	}
+
+	private boolean shouldHaveNullCharset(HttpMessageConverter messageConverter,
+			FeignOutputMessage outputMessage) {
+		return binaryContentType(outputMessage)
+				|| messageConverter instanceof ByteArrayHttpMessageConverter
+				|| messageConverter instanceof ProtobufHttpMessageConverter
+						&& ProtobufHttpMessageConverter.PROTOBUF.isCompatibleWith(
+								outputMessage.getHeaders().getContentType());
+	}
+
 	@SuppressWarnings("unchecked")
 	private FeignOutputMessage checkAndWrite(Object body, MediaType contentType,
 			HttpMessageConverter converter, RequestTemplate request) throws IOException {
@@ -195,6 +229,29 @@ public class SpringEncoder implements Encoder {
 		}
 	}
 
+	private boolean isFormRelatedContentType(MediaType requestContentType) {
+		return isMultipartType(requestContentType)
+				|| isFormUrlEncoded(requestContentType);
+	}
+
+	private boolean isMultipartType(MediaType requestContentType) {
+		return Arrays.asList(MULTIPART_FORM_DATA, MULTIPART_MIXED, MULTIPART_RELATED)
+				.contains(requestContentType);
+	}
+
+	private boolean isFormUrlEncoded(MediaType requestContentType) {
+		return Objects.equals(APPLICATION_FORM_URLENCODED, requestContentType);
+	}
+
+	private boolean binaryContentType(FeignOutputMessage outputMessage) {
+		MediaType contentType = outputMessage.getHeaders().getContentType();
+		return contentType == null || Stream
+				.of(MediaType.APPLICATION_CBOR, MediaType.APPLICATION_OCTET_STREAM,
+						MediaType.APPLICATION_PDF, MediaType.IMAGE_GIF,
+						MediaType.IMAGE_JPEG, MediaType.IMAGE_PNG)
+				.anyMatch(mediaType -> mediaType.includes(contentType));
+	}
+
 	private final class FeignOutputMessage implements HttpOutputMessage {
 
 		private final ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
@@ -202,21 +259,21 @@ public class SpringEncoder implements Encoder {
 		private final HttpHeaders httpHeaders;
 
 		private FeignOutputMessage(RequestTemplate request) {
-			this.httpHeaders = getHttpHeaders(request.headers());
+			httpHeaders = getHttpHeaders(request.headers());
 		}
 
 		@Override
 		public OutputStream getBody() throws IOException {
-			return this.outputStream;
+			return outputStream;
 		}
 
 		@Override
 		public HttpHeaders getHeaders() {
-			return this.httpHeaders;
+			return httpHeaders;
 		}
 
 		public ByteArrayOutputStream getOutputStream() {
-			return this.outputStream;
+			return outputStream;
 		}
 
 	}

spring-cloud-openfeign-core/src/main/java/org/springframework/cloud/openfeign/support/SpringMvcContract.java

@@ -35,6 +35,8 @@ import feign.Feign;
 import feign.MethodMetadata;
 import feign.Param;
 import feign.Request;
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
 
 import org.springframework.cloud.openfeign.AnnotatedParameterProcessor;
 import org.springframework.cloud.openfeign.CollectionFormat;
@@ -78,10 +80,13 @@ import static org.springframework.core.annotation.AnnotatedElementUtils.findMerg
  * @author Aaron Whiteside
  * @author Artyom Romanenko
  * @author Darren Foong
+ * @author Ram Anaswara
  */
 public class SpringMvcContract extends Contract.BaseContract
 		implements ResourceLoaderAware {
 
+	private static final Log LOG = LogFactory.getLog(SpringMvcContract.class);
+
 	private static final String ACCEPT = "Accept";
 
 	private static final String CONTENT_TYPE = "Content-Type";
@@ -104,6 +109,8 @@ public class SpringMvcContract extends Contract.BaseContract
 
 	private ResourceLoader resourceLoader = new DefaultResourceLoader();
 
+	private boolean decodeSlash;
+
 	public SpringMvcContract() {
 		this(Collections.emptyList());
 	}
@@ -116,6 +123,12 @@ public class SpringMvcContract extends Contract.BaseContract
 	public SpringMvcContract(
 			List<AnnotatedParameterProcessor> annotatedParameterProcessors,
 			ConversionService conversionService) {
+		this(annotatedParameterProcessors, conversionService, true);
+	}
+
+	public SpringMvcContract(
+			List<AnnotatedParameterProcessor> annotatedParameterProcessors,
+			ConversionService conversionService, boolean decodeSlash) {
 		Assert.notNull(annotatedParameterProcessors,
 				"Parameter processors can not be null.");
 		Assert.notNull(conversionService, "ConversionService can not be null.");
@@ -126,6 +139,7 @@ public class SpringMvcContract extends Contract.BaseContract
 		annotatedArgumentProcessors = toAnnotatedArgumentProcessorMap(processors);
 		this.conversionService = conversionService;
 		convertingExpanderFactory = new ConvertingExpanderFactory(conversionService);
+		this.decodeSlash = decodeSlash;
 	}
 
 	private static TypeDescriptor createTypeDescriptor(Method method, int paramIndex) {
@@ -171,46 +185,19 @@ public class SpringMvcContract extends Contract.BaseContract
 
 	@Override
 	protected void processAnnotationOnClass(MethodMetadata data, Class<?> clz) {
-		if (clz.getInterfaces().length == 0) {
+		RequestMapping classAnnotation = findMergedAnnotation(clz, RequestMapping.class);
-			RequestMapping classAnnotation = findMergedAnnotation(clz,
+		if (classAnnotation != null) {
-					RequestMapping.class);
+			LOG.error("Cannot process class: " + clz.getName()
-			if (classAnnotation != null) {
+					+ ". @RequestMapping annotation is not allowed on @FeignClient interfaces.");
-				// Prepend path from class annotation if specified
+			throw new IllegalArgumentException(
-				if (classAnnotation.value().length > 0) {
+					"@RequestMapping annotation not allowed on @FeignClient interfaces");
-					String pathValue = emptyToNull(classAnnotation.value()[0]);
-					pathValue = resolve(pathValue);
-					if (!pathValue.startsWith("/")) {
-						pathValue = "/" + pathValue;
-					}
-					data.template().uri(pathValue);
-				}
-			}
 		}
 	}
 
 	@Override
 	public MethodMetadata parseAndValidateMetadata(Class<?> targetType, Method method) {
 		processedMethods.put(Feign.configKey(targetType, method), method);
-		MethodMetadata md = super.parseAndValidateMetadata(targetType, method);
+		return super.parseAndValidateMetadata(targetType, method);
-
-		RequestMapping classAnnotation = findMergedAnnotation(targetType,
-				RequestMapping.class);
-		if (classAnnotation != null) {
-			// produces - use from class annotation only if method has not specified this
-			if (!md.template().headers().containsKey(ACCEPT)) {
-				parseProduces(md, method, classAnnotation);
-			}
-
-			// consumes -- use from class annotation only if method has not specified this
-			if (!md.template().headers().containsKey(CONTENT_TYPE)) {
-				parseConsumes(md, method, classAnnotation);
-			}
-
-			// headers -- class annotation is inherited to methods, always write these if
-			// present
-			parseHeaders(md, method, classAnnotation);
-		}
-		return md;
 	}
 
 	@Override
@@ -247,6 +234,9 @@ public class SpringMvcContract extends Contract.BaseContract
 					pathValue = "/" + pathValue;
 				}
 				data.template().uri(pathValue, true);
+				if (data.template().decodeSlash() != decodeSlash) {
+					data.template().decodeSlash(decodeSlash);
+				}
 			}
 		}
 

spring-cloud-openfeign-core/src/main/resources/META-INF/additional-spring-configuration-metadata.json

@@ -8,12 +8,30 @@
 			"description": "If true, an OpenFeign client will be wrapped with a Hystrix circuit breaker.",
 			"defaultValue": "false"
 		},
+		{
+			"name": "feign.autoconfiguration.jackson.enabled",
+			"type": "java.lang.Boolean",
+			"description": "If true, PageJacksonModule and SortJacksonModule bean will be provided for Jackson page decoding.",
+			"defaultValue": "false"
+		},
+		{
+			"name": "feign.circuitbreaker.enabled",
+			"type": "java.lang.Boolean",
+			"description": "If true, an OpenFeign client will be wrapped with a Spring Cloud CircuitBreaker circuit breaker.",
+			"defaultValue": "false"
+		},
 		{
 			"name": "feign.httpclient.enabled",
 			"type": "java.lang.Boolean",
 			"description": "Enables the use of the Apache HTTP Client by Feign.",
 			"defaultValue": "true"
 		},
+		{
+			"name": "feign.httpclient.hc5.enabled",
+			"type": "java.lang.Boolean",
+			"description": "Enables the use of the Apache HTTP Client 5 by Feign.",
+			"defaultValue": "false"
+		},
 		{
 			"name": "feign.okhttp.enabled",
 			"type": "java.lang.Boolean",

spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/FeignAutoConfigurationTests.java

@@ -0,0 +1,107 @@
+/*
+ * Copyright 2013-2020 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.cloud.openfeign;
+
+import feign.hystrix.HystrixFeign;
+import org.assertj.core.api.Condition;
+import org.junit.jupiter.api.Test;
+
+import org.springframework.boot.autoconfigure.AutoConfigurations;
+import org.springframework.boot.test.context.FilteredClassLoader;
+import org.springframework.boot.test.context.runner.ApplicationContextRunner;
+import org.springframework.cloud.client.circuitbreaker.CircuitBreaker;
+import org.springframework.cloud.client.circuitbreaker.CircuitBreakerFactory;
+import org.springframework.context.ConfigurableApplicationContext;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.Mockito.mock;
+
+/**
+ * @author Tim Peeters
+ */
+class FeignAutoConfigurationTests {
+
+	private final ApplicationContextRunner runner = new ApplicationContextRunner()
+			.withConfiguration(AutoConfigurations.of(FeignAutoConfiguration.class));
+
+	@Test
+	void shouldInstantiateHystrixTargeterToMaintainBackwardsCompatibility() {
+		runner.run(ctx -> assertOnlyOneTargeterPresent(ctx, HystrixTargeter.class));
+	}
+
+	@Test
+	void shouldInstantiateHystrixTargeterWhenExplicitlyEnabled() {
+		runner.withPropertyValues("feign.hystrix.enabled=true")
+				.run(ctx -> assertOnlyOneTargeterPresent(ctx, HystrixTargeter.class));
+	}
+
+	@Test
+	void shouldInstantiateDefaultTargeterWhenHystrixIsDisabled() {
+		runner.withPropertyValues("feign.hystrix.enabled=false")
+				.run(ctx -> assertOnlyOneTargeterPresent(ctx, DefaultTargeter.class));
+	}
+
+	@Test
+	void shouldInstantiateDefaultTargeterWhenHystrixFeignClassIsMissing() {
+		runner.withPropertyValues("feign.hystrix.enabled=true")
+				.withClassLoader(new FilteredClassLoader(HystrixFeign.class))
+				.run(ctx -> assertOnlyOneTargeterPresent(ctx, DefaultTargeter.class));
+	}
+
+	@Test
+	void shouldInstantiateDefaultTargeterWhenHystrixFeignAndCircuitBreakerClassesAreMissing() {
+		runner.withPropertyValues("feign.hystrix.enabled=true",
+				"feign.circuitbreaker.enabled=true")
+				.withClassLoader(
+						new FilteredClassLoader(HystrixFeign.class, CircuitBreaker.class))
+				.run(ctx -> assertOnlyOneTargeterPresent(ctx, DefaultTargeter.class));
+	}
+
+	@Test
+	void shouldInstantiateDefaultTargeterWhenHystrixFeignClassIsMissingAndFeignCircuitBreakerIsDisabled() {
+		runner.withClassLoader(new FilteredClassLoader(HystrixFeign.class))
+				.withPropertyValues("feign.circuitbreaker.enabled=false")
+				.run(ctx -> assertOnlyOneTargeterPresent(ctx, DefaultTargeter.class));
+	}
+
+	@Test
+	void shouldInstantiateFeignCircuitBreakerTargeterWhenEnabled() {
+		runner.withBean(CircuitBreakerFactory.class,
+				() -> mock(CircuitBreakerFactory.class))
+				.withPropertyValues("feign.circuitbreaker.enabled=true")
+				.run(ctx -> assertOnlyOneTargeterPresent(ctx,
+						FeignCircuitBreakerTargeter.class));
+	}
+
+	@Test
+	void shouldInstantiateFeignCircuitBreakerTargeterWhenBothHystrixAndCircuitBreakerAreEnabled() {
+		runner.withBean(CircuitBreakerFactory.class,
+				() -> mock(CircuitBreakerFactory.class))
+				.withPropertyValues("feign.hystrix.enabled=true",
+						"feign.circuitbreaker.enabled=true")
+				.run(ctx -> assertOnlyOneTargeterPresent(ctx,
+						FeignCircuitBreakerTargeter.class));
+	}
+
+	private void assertOnlyOneTargeterPresent(ConfigurableApplicationContext ctx,
+			Class<?> beanClass) {
+		assertThat(ctx.getBeansOfType(Targeter.class)).hasSize(1)
+				.hasValueSatisfying(new Condition<>(beanClass::isInstance, String
+						.format("Targeter should be an instance of %s", beanClass)));
+	}
+
+}

spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/FeignBuilderCustomizerTests.java

@@ -0,0 +1,180 @@
+/*
+ * Copyright 2013-2019 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.cloud.openfeign;
+
+import java.lang.reflect.Field;
+
+import feign.Feign;
+import feign.Logger;
+import org.junit.Test;
+
+import org.springframework.context.annotation.AnnotationConfigApplicationContext;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Import;
+import org.springframework.core.annotation.Order;
+import org.springframework.util.ReflectionUtils;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * @author Matt King
+ * @author Sam Kruglov
+ */
+public class FeignBuilderCustomizerTests {
+
+	@Test
+	public void testBuilderCustomizer() {
+		AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(
+				FeignBuilderCustomizerTests.SampleConfiguration2.class);
+
+		FeignClientFactoryBean clientFactoryBean = context
+				.getBean(FeignClientFactoryBean.class);
+		FeignContext feignContext = context.getBean(FeignContext.class);
+
+		Feign.Builder builder = clientFactoryBean.feign(feignContext);
+		assertFeignBuilderField(builder, "logLevel", Logger.Level.HEADERS);
+		assertFeignBuilderField(builder, "decode404", true);
+
+		context.close();
+	}
+
+	private void assertFeignBuilderField(Feign.Builder builder, String fieldName,
+			Object expectedValue) {
+		Field builderField = ReflectionUtils.findField(Feign.Builder.class, fieldName);
+		ReflectionUtils.makeAccessible(builderField);
+
+		Object value = ReflectionUtils.getField(builderField, builder);
+		assertThat(value).as("Expected value for the field '" + fieldName + "':")
+				.isEqualTo(expectedValue);
+	}
+
+	@Test
+	public void testBuildCustomizerOrdered() {
+		AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(
+				FeignBuilderCustomizerTests.SampleConfiguration3.class);
+
+		FeignClientFactoryBean clientFactoryBean = context
+				.getBean(FeignClientFactoryBean.class);
+		FeignContext feignContext = context.getBean(FeignContext.class);
+
+		Feign.Builder builder = clientFactoryBean.feign(feignContext);
+		assertFeignBuilderField(builder, "logLevel", Logger.Level.FULL);
+		assertFeignBuilderField(builder, "decode404", true);
+
+		context.close();
+	}
+
+	@Test
+	public void testBuildCustomizerOrderedWithAdditional() {
+		AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(
+				FeignBuilderCustomizerTests.SampleConfiguration3.class);
+
+		FeignClientFactoryBean clientFactoryBean = context
+				.getBean(FeignClientFactoryBean.class);
+		clientFactoryBean.addCustomizer(builder -> builder.logLevel(Logger.Level.BASIC));
+		clientFactoryBean.addCustomizer(Feign.Builder::doNotCloseAfterDecode);
+		FeignContext feignContext = context.getBean(FeignContext.class);
+
+		Feign.Builder builder = clientFactoryBean.feign(feignContext);
+		assertFeignBuilderField(builder, "logLevel", Logger.Level.BASIC);
+		assertFeignBuilderField(builder, "decode404", true);
+		assertFeignBuilderField(builder, "closeAfterDecode", false);
+
+		context.close();
+	}
+
+	private static FeignClientFactoryBean defaultFeignClientFactoryBean() {
+		FeignClientFactoryBean feignClientFactoryBean = new FeignClientFactoryBean();
+		feignClientFactoryBean.setContextId("test");
+		feignClientFactoryBean.setName("test");
+		feignClientFactoryBean.setType(FeignClientFactoryTests.TestType.class);
+		feignClientFactoryBean.setPath("");
+		feignClientFactoryBean.setUrl("http://some.absolute.url");
+		return feignClientFactoryBean;
+	}
+
+	@Configuration(proxyBeanMethods = false)
+	@Import(FeignClientsConfiguration.class)
+	protected static class SampleConfiguration2 {
+
+		@Bean
+		FeignContext feignContext() {
+			return new FeignContext();
+		}
+
+		@Bean
+		FeignClientProperties feignClientProperties() {
+			return new FeignClientProperties();
+		}
+
+		@Bean
+		FeignBuilderCustomizer feignBuilderCustomizer() {
+			return builder -> builder.logLevel(Logger.Level.HEADERS);
+		}
+
+		@Bean
+		FeignBuilderCustomizer feignBuilderCustomizer2() {
+			return Feign.Builder::decode404;
+		}
+
+		@Bean
+		FeignClientFactoryBean feignClientFactoryBean() {
+			return defaultFeignClientFactoryBean();
+		}
+
+	}
+
+	@Configuration(proxyBeanMethods = false)
+	@Import(FeignClientsConfiguration.class)
+	protected static class SampleConfiguration3 {
+
+		@Bean
+		FeignContext feignContext() {
+			return new FeignContext();
+		}
+
+		@Bean
+		FeignClientProperties feignClientProperties() {
+			return new FeignClientProperties();
+		}
+
+		@Bean
+		@Order(1)
+		FeignBuilderCustomizer feignBuilderCustomizer() {
+			return builder -> builder.logLevel(Logger.Level.HEADERS);
+		}
+
+		@Bean
+		@Order(2)
+		FeignBuilderCustomizer feignBuilderCustomizer1() {
+			return builder -> builder.logLevel(Logger.Level.FULL);
+		}
+
+		@Bean
+		FeignBuilderCustomizer feignBuilderCustomizer2() {
+			return Feign.Builder::decode404;
+		}
+
+		@Bean
+		FeignClientFactoryBean feignClientFactoryBean() {
+			return defaultFeignClientFactoryBean();
+		}
+
+	}
+
+}

spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/FeignClientBuilderTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -24,6 +24,7 @@ import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
 
+import feign.Feign;
 import feign.hystrix.FallbackFactory;
 import org.hamcrest.Matchers;
 import org.junit.Before;
@@ -40,6 +41,7 @@ import static org.assertj.core.api.Assertions.assertThat;
 
 /**
  * @author Sven Döring
+ * @author Sam Kruglov
  */
 public class FeignClientBuilderTests {
 
@@ -58,6 +60,14 @@ public class FeignClientBuilderTests {
 
 	private static void assertFactoryBeanField(final FeignClientBuilder.Builder builder,
 			final String fieldName, final Object expectedValue) {
+		final Object value = getFactoryBeanField(builder, fieldName);
+		assertThat(value).as("Expected value for the field '" + fieldName + "':")
+				.isEqualTo(expectedValue);
+	}
+
+	@SuppressWarnings("unchecked")
+	private static <T> T getFactoryBeanField(final FeignClientBuilder.Builder builder,
+			final String fieldName) {
 		final Field factoryBeanField = ReflectionUtils
 				.findField(FeignClientBuilder.Builder.class, "feignClientFactoryBean");
 		ReflectionUtils.makeAccessible(factoryBeanField);
@@ -67,9 +77,7 @@ public class FeignClientBuilderTests {
 		final Field field = ReflectionUtils.findField(FeignClientFactoryBean.class,
 				fieldName);
 		ReflectionUtils.makeAccessible(field);
-		final Object value = ReflectionUtils.getField(field, factoryBean);
+		return (T) ReflectionUtils.getField(field, factoryBean);
-		assertThat(value).as("Expected value for the field '" + fieldName + "':")
-				.isEqualTo(expectedValue);
 	}
 
 	@Before
@@ -84,9 +92,9 @@ public class FeignClientBuilderTests {
 		for (final Method method : FeignClient.class.getMethods()) {
 			methodNames.add(method.getName());
 		}
-		methodNames.removeAll(
+		methodNames.removeAll(Arrays.asList("annotationType", "value", "serviceId",
-				Arrays.asList("annotationType", "value", "serviceId", "qualifier",
+				"qualifier", "qualifiers", "configuration", "primary", "equals",
-						"configuration", "primary", "equals", "hashCode", "toString"));
+				"hashCode", "toString"));
 		Collections.sort(methodNames);
 		// If this safety check fails the Builder has to be updated.
 		// (1) Either a field was removed from the FeignClient annotation and so it has to
@@ -131,7 +139,8 @@ public class FeignClientBuilderTests {
 				.forType(TestFeignClient.class, "TestClient").inheritParentContext(false)
 				.fallback(TestFeignClientFallback.class)
 				.fallbackFactory(TestFeignClientFallbackFactory.class).decode404(true)
-				.url("Url/").path("/Path").contextId("TestContext");
+				.url("Url/").path("/Path").contextId("TestContext")
+				.customize(Feign.Builder::doNotCloseAfterDecode);
 
 		// then:
 		assertFactoryBeanField(builder, "applicationContext", this.applicationContext);
@@ -147,14 +156,21 @@ public class FeignClientBuilderTests {
 		assertFactoryBeanField(builder, "fallback", TestFeignClientFallback.class);
 		assertFactoryBeanField(builder, "fallbackFactory",
 				TestFeignClientFallbackFactory.class);
+		List<FeignBuilderCustomizer> additionalCustomizers = getFactoryBeanField(builder,
+				"additionalCustomizers");
+		assertThat(additionalCustomizers).hasSize(1);
 	}
 
 	@Test
 	public void forType_build() {
 		// given:
 		Mockito.when(this.applicationContext.getBean(FeignContext.class))
-				.thenThrow(new ClosedFileSystemException()); // throw an unusual exception
+				.thenThrow(new ClosedFileSystemException()); // throw
-																// in the
+																// an
+																// unusual
+																// exception
+																// in
+																// the
 																// FeignClientFactoryBean
 		final FeignClientBuilder.Builder builder = this.feignClientBuilder
 				.forType(TestClient.class, "TestClient");

spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/FeignClientOverrideDefaultsTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,6 +16,8 @@
 
 package org.springframework.cloud.openfeign;
 
+import java.util.concurrent.TimeUnit;
+
 import feign.Contract;
 import feign.ExceptionPropagationPolicy;
 import feign.Feign;
@@ -24,7 +26,6 @@ import feign.QueryMapEncoder;
 import feign.Request;
 import feign.RequestInterceptor;
 import feign.RequestLine;
-import feign.RequestTemplate;
 import feign.Retryer;
 import feign.auth.BasicAuthRequestInterceptor;
 import feign.codec.Decoder;
@@ -34,8 +35,7 @@ import feign.hystrix.HystrixFeign;
 import feign.optionals.OptionalDecoder;
 import feign.querymap.BeanQueryMapEncoder;
 import feign.slf4j.Slf4jLogger;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
-import org.junit.runner.RunWith;
 
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.autoconfigure.context.PropertyPlaceholderAutoConfiguration;
@@ -47,19 +47,17 @@ import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.Import;
 import org.springframework.test.annotation.DirtiesContext;
-import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.web.bind.annotation.GetMapping;
-import org.springframework.web.bind.annotation.RequestMapping;
-import org.springframework.web.bind.annotation.RequestMethod;
 
 import static org.assertj.core.api.Assertions.assertThat;
 
 /**
  * @author Spencer Gibb
+ * @author Olga Maciaszek-Sharma
  */
-@RunWith(SpringJUnit4ClassRunner.class)
 @SpringBootTest(classes = FeignClientOverrideDefaultsTests.TestConfiguration.class)
 @DirtiesContext
-public class FeignClientOverrideDefaultsTests {
+class FeignClientOverrideDefaultsTests {
 
 	@Autowired
 	private FeignContext context;
@@ -71,92 +69,90 @@ public class FeignClientOverrideDefaultsTests {
 	private BarClient bar;
 
 	@Test
-	public void clientsAvailable() {
+	void clientsAvailable() {
-		assertThat(this.foo).isNotNull();
+		assertThat(foo).isNotNull();
-		assertThat(this.bar).isNotNull();
+		assertThat(bar).isNotNull();
 	}
 
 	@Test
-	public void overrideDecoder() {
+	void overrideDecoder() {
-		Decoder.Default.class.cast(this.context.getInstance("foo", Decoder.class));
+		Decoder.Default.class.cast(context.getInstance("foo", Decoder.class));
-		OptionalDecoder.class.cast(this.context.getInstance("bar", Decoder.class));
+		OptionalDecoder.class.cast(context.getInstance("bar", Decoder.class));
 	}
 
 	@Test
-	public void overrideEncoder() {
+	void overrideEncoder() {
-		Encoder.Default.class.cast(this.context.getInstance("foo", Encoder.class));
+		Encoder.Default.class.cast(context.getInstance("foo", Encoder.class));
-		PageableSpringEncoder.class.cast(this.context.getInstance("bar", Encoder.class));
+		PageableSpringEncoder.class.cast(context.getInstance("bar", Encoder.class));
 	}
 
 	@Test
-	public void overrideLogger() {
+	void overrideLogger() {
-		Logger.JavaLogger.class.cast(this.context.getInstance("foo", Logger.class));
+		Logger.JavaLogger.class.cast(context.getInstance("foo", Logger.class));
-		Slf4jLogger.class.cast(this.context.getInstance("bar", Logger.class));
+		Slf4jLogger.class.cast(context.getInstance("bar", Logger.class));
 	}
 
 	@Test
-	public void overrideContract() {
+	void overrideContract() {
-		Contract.Default.class.cast(this.context.getInstance("foo", Contract.class));
+		Contract.Default.class.cast(context.getInstance("foo", Contract.class));
-		SpringMvcContract.class.cast(this.context.getInstance("bar", Contract.class));
+		SpringMvcContract.class.cast(context.getInstance("bar", Contract.class));
 	}
 
 	@Test
-	public void overrideLoggerLevel() {
+	void overrideLoggerLevel() {
-		assertThat(this.context.getInstance("foo", Logger.Level.class)).isNull();
+		assertThat(context.getInstance("foo", Logger.Level.class)).isNull();
-		assertThat(this.context.getInstance("bar", Logger.Level.class))
+		assertThat(context.getInstance("bar", Logger.Level.class))
 				.isEqualTo(Logger.Level.HEADERS);
 	}
 
 	@Test
-	public void overrideRetryer() {
+	void overrideRetryer() {
-		assertThat(this.context.getInstance("foo", Retryer.class))
+		assertThat(context.getInstance("foo", Retryer.class))
 				.isEqualTo(Retryer.NEVER_RETRY);
-		Retryer.Default.class.cast(this.context.getInstance("bar", Retryer.class));
+		Retryer.Default.class.cast(context.getInstance("bar", Retryer.class));
 	}
 
 	@Test
-	public void overrideErrorDecoder() {
+	void overrideErrorDecoder() {
-		assertThat(this.context.getInstance("foo", ErrorDecoder.class)).isNull();
+		assertThat(context.getInstance("foo", ErrorDecoder.class)).isNull();
-		ErrorDecoder.Default.class
+		ErrorDecoder.Default.class.cast(context.getInstance("bar", ErrorDecoder.class));
-				.cast(this.context.getInstance("bar", ErrorDecoder.class));
 	}
 
 	@Test
-	public void overrideBuilder() {
+	void overrideBuilder() {
-		HystrixFeign.Builder.class
+		HystrixFeign.Builder.class.cast(context.getInstance("foo", Feign.Builder.class));
-				.cast(this.context.getInstance("foo", Feign.Builder.class));
+		Feign.Builder.class.cast(context.getInstance("bar", Feign.Builder.class));
-		Feign.Builder.class.cast(this.context.getInstance("bar", Feign.Builder.class));
 	}
 
 	@Test
-	public void overrideRequestOptions() {
+	void overrideRequestOptions() {
-		assertThat(this.context.getInstance("foo", Request.Options.class)).isNull();
+		assertThat(context.getInstance("foo", Request.Options.class)).isNull();
-		Request.Options options = this.context.getInstance("bar", Request.Options.class);
+		Request.Options options = context.getInstance("bar", Request.Options.class);
 		assertThat(options.connectTimeoutMillis()).isEqualTo(1);
 		assertThat(options.readTimeoutMillis()).isEqualTo(1);
+		assertThat(options.isFollowRedirects()).isFalse();
 	}
 
 	@Test
-	public void overrideQueryMapEncoder() {
+	void overrideQueryMapEncoder() {
 		QueryMapEncoder.Default.class
-				.cast(this.context.getInstance("foo", QueryMapEncoder.class));
+				.cast(context.getInstance("foo", QueryMapEncoder.class));
-		BeanQueryMapEncoder.class
+		BeanQueryMapEncoder.class.cast(context.getInstance("bar", QueryMapEncoder.class));
-				.cast(this.context.getInstance("bar", QueryMapEncoder.class));
 	}
 
 	@Test
-	public void addRequestInterceptor() {
+	void addRequestInterceptor() {
-		assertThat(this.context.getInstances("foo", RequestInterceptor.class).size())
+		assertThat(context.getInstances("foo", RequestInterceptor.class).size())
 				.isEqualTo(1);
-		assertThat(this.context.getInstances("bar", RequestInterceptor.class).size())
+		assertThat(context.getInstances("bar", RequestInterceptor.class).size())
 				.isEqualTo(2);
 	}
 
 	@Test
-	public void exceptionPropagationPolicy() {
+	void exceptionPropagationPolicy() {
-		assertThat(this.context.getInstances("foo", ExceptionPropagationPolicy.class))
+		assertThat(context.getInstances("foo", ExceptionPropagationPolicy.class))
-				.isNull();
+				.isEmpty();
-		assertThat(this.context.getInstances("bar", ExceptionPropagationPolicy.class))
+		assertThat(context.getInstances("bar", ExceptionPropagationPolicy.class))
 				.containsValues(ExceptionPropagationPolicy.UNWRAP);
 	}
 
@@ -173,7 +169,7 @@ public class FeignClientOverrideDefaultsTests {
 			configuration = BarConfiguration.class)
 	interface BarClient {
 
-		@RequestMapping(value = "/", method = RequestMethod.GET)
+		@GetMapping("/")
 		String get();
 
 	}
@@ -186,10 +182,7 @@ public class FeignClientOverrideDefaultsTests {
 
 		@Bean
 		RequestInterceptor defaultRequestInterceptor() {
-			return new RequestInterceptor() {
+			return template -> {
-				@Override
-				public void apply(RequestTemplate template) {
-				}
 			};
 		}
 
@@ -248,7 +241,8 @@ public class FeignClientOverrideDefaultsTests {
 
 		@Bean
 		Request.Options feignRequestOptions() {
-			return new Request.Options(1, 1);
+			return new Request.Options(1, TimeUnit.MILLISECONDS, 1, TimeUnit.MILLISECONDS,
+					false);
 		}
 
 		@Bean

spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/FeignClientUsingConfigurerTest.java

@@ -26,10 +26,10 @@ import org.junit.Test;
 import org.junit.runner.RunWith;
 
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.cloud.openfeign.clientconfig.FeignClientConfigurer;
-import org.springframework.context.ApplicationContext;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.test.annotation.DirtiesContext;
@@ -49,18 +49,19 @@ import static org.assertj.core.api.Assertions.assertThat;
 		"feign.client.config.default.requestInterceptors[1]=org.springframework.cloud.openfeign.FeignClientUsingPropertiesTests.BarRequestInterceptor" })
 public class FeignClientUsingConfigurerTest {
 
-	private static final String BEAN_NAME_PREFIX = "&org.springframework.cloud.openfeign.FeignClientUsingConfigurerTest$";
+	private static final String BEAN_NAME_PREFIX = "org.springframework.cloud.openfeign.FeignClientUsingConfigurerTest$";
 
 	@Autowired
-	private ApplicationContext applicationContext;
+	private ConfigurableListableBeanFactory beanFactory;
 
 	@Autowired
 	private FeignContext context;
 
 	@Test
 	public void testFeignClient() {
-		FeignClientFactoryBean factoryBean = (FeignClientFactoryBean) applicationContext
+		FeignClientFactoryBean factoryBean = (FeignClientFactoryBean) beanFactory
-				.getBean(BEAN_NAME_PREFIX + "TestFeignClient");
+				.getBeanDefinition(BEAN_NAME_PREFIX + "TestFeignClient")
+				.getAttribute("feignClientsRegistrarFactoryBean");
 		Feign.Builder builder = factoryBean.feign(context);
 
 		List<RequestInterceptor> interceptors = (List) getBuilderValue(builder,
@@ -79,8 +80,9 @@ public class FeignClientUsingConfigurerTest {
 
 	@Test
 	public void testNoInheritFeignClient() {
-		FeignClientFactoryBean factoryBean = (FeignClientFactoryBean) applicationContext
+		FeignClientFactoryBean factoryBean = (FeignClientFactoryBean) beanFactory
-				.getBean(BEAN_NAME_PREFIX + "NoInheritFeignClient");
+				.getBeanDefinition(BEAN_NAME_PREFIX + "NoInheritFeignClient")
+				.getAttribute("feignClientsRegistrarFactoryBean");
 		Feign.Builder builder = factoryBean.feign(context);
 
 		List<RequestInterceptor> interceptors = (List) getBuilderValue(builder,
@@ -93,8 +95,9 @@ public class FeignClientUsingConfigurerTest {
 
 	@Test
 	public void testNoInheritFeignClient_ignoreProperties() {
-		FeignClientFactoryBean factoryBean = (FeignClientFactoryBean) applicationContext
+		FeignClientFactoryBean factoryBean = (FeignClientFactoryBean) beanFactory
-				.getBean(BEAN_NAME_PREFIX + "NoInheritFeignClient");
+				.getBeanDefinition(BEAN_NAME_PREFIX + "NoInheritFeignClient")
+				.getAttribute("feignClientsRegistrarFactoryBean");
 		Feign.Builder builder = factoryBean.feign(context);
 
 		assertThat(getBuilderValue(builder, "logLevel")).as("log level not set")

spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/FeignClientUsingPropertiesTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -22,9 +22,15 @@ import java.lang.reflect.Proxy;
 import java.lang.reflect.Type;
 import java.net.SocketTimeoutException;
 import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collection;
 import java.util.Collections;
+import java.util.List;
 import java.util.Map;
 import java.util.Objects;
+import java.util.concurrent.TimeUnit;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
 
 import javax.servlet.http.HttpServletRequest;
 
@@ -55,8 +61,11 @@ import org.springframework.test.context.TestPropertySource;
 import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
 import org.springframework.test.util.ReflectionTestUtils;
 import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestHeader;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestMethod;
+import org.springframework.web.bind.annotation.RequestParam;
 import org.springframework.web.bind.annotation.RestController;
 
 import static org.assertj.core.api.Assertions.assertThat;
@@ -66,6 +75,7 @@ import static org.springframework.boot.test.context.SpringBootTest.WebEnvironmen
 /**
  * @author Eko Kurniawan Khannedy
  * @author Olga Maciaszek-Sharma
+ * @author Ilia Ilinykh
  */
 @SuppressWarnings("FieldMayBeFinal")
 @RunWith(SpringJUnit4ClassRunner.class)
@@ -92,6 +102,10 @@ public class FeignClientUsingPropertiesTests {
 
 	private FeignClientFactoryBean formFactoryBean;
 
+	private FeignClientFactoryBean defaultHeadersAndQuerySingleParamsFeignClientFactoryBean;
+
+	private FeignClientFactoryBean defaultHeadersAndQueryMultipleParamsFeignClientFactoryBean;
+
 	public FeignClientUsingPropertiesTests() {
 		fooFactoryBean = new FeignClientFactoryBean();
 		fooFactoryBean.setContextId("foo");
@@ -108,6 +122,18 @@ public class FeignClientUsingPropertiesTests {
 		formFactoryBean = new FeignClientFactoryBean();
 		formFactoryBean.setContextId("form");
 		formFactoryBean.setType(FeignClientFactoryBean.class);
+
+		this.defaultHeadersAndQuerySingleParamsFeignClientFactoryBean = new FeignClientFactoryBean();
+		this.defaultHeadersAndQuerySingleParamsFeignClientFactoryBean
+				.setContextId("singleValue");
+		this.defaultHeadersAndQuerySingleParamsFeignClientFactoryBean
+				.setType(FeignClientFactoryBean.class);
+
+		this.defaultHeadersAndQueryMultipleParamsFeignClientFactoryBean = new FeignClientFactoryBean();
+		this.defaultHeadersAndQueryMultipleParamsFeignClientFactoryBean
+				.setContextId("multipleValue");
+		this.defaultHeadersAndQueryMultipleParamsFeignClientFactoryBean
+				.setType(FeignClientFactoryBean.class);
 	}
 
 	public FooClient fooClient() {
@@ -159,6 +185,35 @@ public class FeignClientUsingPropertiesTests {
 		assertThat(response).isEqualTo("Data");
 	}
 
+	@Test
+	public void testSingleValue() {
+		List<String> response = singleValueClient().singleValue();
+		assertThat(response).isEqualTo(Arrays.asList("header", "parameter"));
+	}
+
+	@Test
+	public void testMultipleValue() {
+		List<String> response = multipleValueClient().multipleValue();
+		assertThat(response).isEqualTo(
+				Arrays.asList("header1", "header2", "parameter1", "parameter2"));
+	}
+
+	public SingleValueClient singleValueClient() {
+		this.defaultHeadersAndQuerySingleParamsFeignClientFactoryBean
+				.setApplicationContext(this.applicationContext);
+		return this.defaultHeadersAndQuerySingleParamsFeignClientFactoryBean
+				.feign(this.context)
+				.target(SingleValueClient.class, "http://localhost:" + this.port);
+	}
+
+	public MultipleValueClient multipleValueClient() {
+		this.defaultHeadersAndQueryMultipleParamsFeignClientFactoryBean
+				.setApplicationContext(this.applicationContext);
+		return this.defaultHeadersAndQueryMultipleParamsFeignClientFactoryBean
+				.feign(this.context)
+				.target(MultipleValueClient.class, "http://localhost:" + this.port);
+	}
+
 	@Test
 	public void readTimeoutShouldWorkWhenConnectTimeoutNotSet() {
 		FeignClientFactoryBean readTimeoutFactoryBean = new FeignClientFactoryBean();
@@ -191,6 +246,21 @@ public class FeignClientUsingPropertiesTests {
 		assertThat(options.readTimeoutMillis()).isEqualTo(5000);
 	}
 
+	@Test
+	public void shouldSetFollowRedirects() {
+		FeignClientFactoryBean testFactoryBean = new FeignClientFactoryBean();
+		testFactoryBean.setContextId("test");
+		testFactoryBean.setType(FeignClientFactoryBean.class);
+		testFactoryBean.setApplicationContext(applicationContext);
+
+		TimeoutClient client = testFactoryBean.feign(context).target(TimeoutClient.class,
+				"http://localhost:" + port);
+
+		Request.Options options = getRequestOptions((Proxy) client);
+
+		assertThat(options.isFollowRedirects()).isFalse();
+	}
+
 	private Request.Options getRequestOptions(Proxy client) {
 		Object invocationHandler = ReflectionTestUtils.getField(client, "h");
 		Map<Method, InvocationHandlerFactory.MethodHandler> dispatch = (Map<Method, InvocationHandlerFactory.MethodHandler>) ReflectionTestUtils
@@ -202,21 +272,21 @@ public class FeignClientUsingPropertiesTests {
 
 	protected interface FooClient {
 
-		@RequestMapping(method = RequestMethod.GET, value = "/foo")
+		@GetMapping(path = "/foo")
 		String foo();
 
 	}
 
 	protected interface BarClient {
 
-		@RequestMapping(method = RequestMethod.GET, value = "/bar")
+		@GetMapping(path = "/bar")
 		String bar();
 
 	}
 
 	protected interface UnwrapClient {
 
-		@RequestMapping(method = RequestMethod.GET, value = "/bar") // intentionally /bar
+		@GetMapping(path = "/bar") // intentionally /bar
 		String unwrap() throws IOException;
 
 	}
@@ -229,6 +299,20 @@ public class FeignClientUsingPropertiesTests {
 
 	}
 
+	protected interface SingleValueClient {
+
+		@GetMapping(path = "/singleValue")
+		List<String> singleValue();
+
+	}
+
+	protected interface MultipleValueClient {
+
+		@GetMapping(path = "/multipleValue")
+		List<String> multipleValue();
+
+	}
+
 	protected interface TimeoutClient {
 
 		@GetMapping("/timeouts")
@@ -253,18 +337,33 @@ public class FeignClientUsingPropertiesTests {
 			}
 		}
 
-		@RequestMapping(method = RequestMethod.GET, value = "/bar")
+		@GetMapping(path = "/bar")
 		public String bar() throws InterruptedException {
-			Thread.sleep(2000L);
+			TimeUnit.SECONDS.sleep(2);
 			return "OK";
 		}
 
-		@RequestMapping(value = "/form", method = RequestMethod.POST,
+		@PostMapping(path = "/form",
 				consumes = MediaType.APPLICATION_FORM_URLENCODED_VALUE)
 		public String form(HttpServletRequest request) {
 			return request.getParameter("form");
 		}
 
+		@GetMapping(path = "/singleValue")
+		public List<String> singleValue(@RequestHeader List<String> singleValueHeaders,
+				@RequestParam List<String> singleValueParameters) {
+			return Stream.of(singleValueHeaders, singleValueParameters)
+					.flatMap(Collection::stream).collect(Collectors.toList());
+		}
+
+		@GetMapping(path = "/multipleValue")
+		public List<String> multipleValue(
+				@RequestHeader List<String> multipleValueHeaders,
+				@RequestParam List<String> multipleValueParameters) {
+			return Stream.of(multipleValueHeaders, multipleValueParameters)
+					.flatMap(Collection::stream).collect(Collectors.toList());
+		}
+
 	}
 
 	public static class FooRequestInterceptor implements RequestInterceptor {

spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/FeignClientsRegistrarIntegrationTests.java

@@ -0,0 +1,135 @@
+/*
+ * Copyright 2013-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.cloud.openfeign;
+
+import org.junit.jupiter.api.Test;
+
+import org.springframework.beans.factory.NoSuchBeanDefinitionException;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.cloud.openfeign.test.NoSecurityConfiguration;
+import org.springframework.context.ConfigurableApplicationContext;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Import;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
+
+/**
+ * Tests for {@link FeignClientsRegistrar}.
+ *
+ * @author Olga Maciaszek-Sharma
+ */
+@SpringBootTest(
+		classes = FeignClientsRegistrarIntegrationTests.QualifiersTestConfig.class)
+class FeignClientsRegistrarIntegrationTests {
+
+	@Autowired
+	ConfigurableApplicationContext context;
+
+	@Test
+	void shouldUseQualifiersIfPresent() {
+		assertThat(context.getBean("qualifier1")).isNotNull();
+		assertThat(context.getBean("qualifier2")).isNotNull();
+		assertThatExceptionOfType(NoSuchBeanDefinitionException.class)
+				.isThrownBy(() -> context.getBean("qualifier3"));
+	}
+
+	@Test
+	void shouldUseQualifierIfQualifiersArrayNotPresent() {
+		assertThat(context.getBean("qualifier4")).isNotNull();
+	}
+
+	@Test
+	void shouldUseDefaultQualifierWhenNonePresent() {
+		assertThat(context.getBean("noQualifiersFeignClient")).isNotNull();
+	}
+
+	@Test
+	void shouldUseQualifierWhenEmptyQualifiers() {
+		assertThat(context.getBean("test1")).isNotNull();
+		assertThatExceptionOfType(NoSuchBeanDefinitionException.class)
+				.isThrownBy(() -> context.getBean("emptyQualifiersFeignClient"));
+	}
+
+	@Test
+	void shouldUseQualifierWhenWhitespaceQualifiers() {
+		assertThat(context.getBean("test2")).isNotNull();
+		assertThatExceptionOfType(NoSuchBeanDefinitionException.class)
+				.isThrownBy(() -> context.getBean("whitespaceQualifiersFeignClient"));
+	}
+
+	@Test
+	void shouldUseDefaultQualifierWhenEmptyQualifiers() {
+		assertThat(context.getBean("emptyQualifiersNoQualifierFeignClient")).isNotNull();
+	}
+
+	@Test
+	void shouldUseDefaultQualifierWhenWhitespaceQualifiers() {
+		assertThat(context.getBean("whitespaceQualifiersNoQualifierFeignClient"))
+				.isNotNull();
+	}
+
+	@FeignClient(name = "qualifiersClient", qualifiers = { "qualifier1", "qualifier2" },
+			qualifier = "qualifier3")
+	protected interface QualifiersClient {
+
+	}
+
+	@FeignClient(name = "qualifierClient", qualifier = "qualifier4")
+	protected interface QualifierClient {
+
+	}
+
+	@FeignClient(name = "noQualifiers")
+	protected interface NoQualifiersClient {
+
+	}
+
+	@FeignClient(name = "emptyQualifiers", qualifier = "test1", qualifiers = {})
+	protected interface EmptyQualifiersClient {
+
+	}
+
+	@FeignClient(name = "whitespaceQualifiers", qualifier = "test2", qualifiers = { " " })
+	protected interface WhitespaceQualifiersClient {
+
+	}
+
+	@FeignClient(name = "emptyQualifiersNoQualifier", qualifiers = {})
+	protected interface EmptyQualifiersNoQualifierClient {
+
+	}
+
+	@FeignClient(name = "whitespaceQualifiersNoQualifier", qualifiers = { " " })
+	protected interface WhitespaceQualifiersNoQualifierClient {
+
+	}
+
+	@Configuration(proxyBeanMethods = false)
+	@EnableAutoConfiguration
+	@Import(NoSecurityConfiguration.class)
+	@EnableFeignClients(clients = { QualifiersClient.class, QualifierClient.class,
+			NoQualifiersClient.class, EmptyQualifiersClient.class,
+			WhitespaceQualifiersClient.class, EmptyQualifiersNoQualifierClient.class,
+			WhitespaceQualifiersNoQualifierClient.class })
+	protected static class QualifiersTestConfig {
+
+	}
+
+}

spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/FeignClientsRegistrarTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -20,7 +20,9 @@ import java.util.Collections;
 
 import org.junit.Test;
 
+import org.springframework.beans.factory.support.DefaultListableBeanFactory;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.cloud.openfeign.test.TestAutoConfiguration;
 import org.springframework.context.annotation.AnnotationConfigApplicationContext;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.mock.env.MockEnvironment;
@@ -28,10 +30,12 @@ import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestMethod;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatCode;
 
 /**
  * @author Spencer Gibb
  * @author Gang Li
+ * @author Michal Domagala
  */
 public class FeignClientsRegistrarTests {
 
@@ -76,7 +80,7 @@ public class FeignClientsRegistrarTests {
 	private String testGetName(String name) {
 		FeignClientsRegistrar registrar = new FeignClientsRegistrar();
 		registrar.setEnvironment(new MockEnvironment());
-		return registrar.getName(Collections.<String, Object>singletonMap("name", name));
+		return registrar.getName(Collections.singletonMap("name", name));
 	}
 
 	@Test(expected = IllegalArgumentException.class)
@@ -89,6 +93,17 @@ public class FeignClientsRegistrarTests {
 		new AnnotationConfigApplicationContext(FallbackFactoryTestConfig.class);
 	}
 
+	@Test
+	public void shouldPassSubLevelFeignClient() {
+		AnnotationConfigApplicationContext config = new AnnotationConfigApplicationContext();
+		((DefaultListableBeanFactory) config.getBeanFactory())
+				.setAllowBeanDefinitionOverriding(false);
+		config.register(TopLevelSubLevelTestConfig.class);
+		assertThatCode(() -> config.refresh()).as(
+				"Case https://github.com/spring-cloud/spring-cloud-openfeign/issues/331 should be solved")
+				.doesNotThrowAnyException();
+	}
+
 	@FeignClient(name = "fallbackTestClient", url = "http://localhost:8080/",
 			fallback = FallbackClient.class)
 	protected interface FallbackClient {
@@ -122,4 +137,12 @@ public class FeignClientsRegistrarTests {
 
 	}
 
+	@EnableFeignClients(clients = {
+			org.springframework.cloud.openfeign.feignclientsregistrar.TopLevelClient.class,
+			org.springframework.cloud.openfeign.feignclientsregistrar.sub.SubLevelClient.class })
+	@EnableAutoConfiguration(exclude = TestAutoConfiguration.class)
+	protected static class TopLevelSubLevelTestConfig {
+
+	}
+
 }

spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/FeignHttpClient5ConfigurationTests.java

@@ -0,0 +1,157 @@
+/*
+ * Copyright 2013-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.cloud.openfeign;
+
+import feign.Client;
+import feign.hc5.ApacheHttp5Client;
+import feign.httpclient.ApacheHttpClient;
+import org.apache.hc.client5.http.impl.classic.CloseableHttpClient;
+import org.apache.hc.client5.http.impl.io.PoolingHttpClientConnectionManager;
+import org.apache.hc.client5.http.io.HttpClientConnectionManager;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import org.springframework.boot.WebApplicationType;
+import org.springframework.boot.builder.SpringApplicationBuilder;
+import org.springframework.cloud.commons.httpclient.HttpClientConfiguration;
+import org.springframework.cloud.test.ClassPathExclusions;
+import org.springframework.cloud.test.ModifiedClassPathRunner;
+import org.springframework.context.ConfigurableApplicationContext;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * @author Nguyen Ky Thanh
+ */
+public class FeignHttpClient5ConfigurationTests {
+
+	private static void verifyHc4BeansAvailable(ConfigurableApplicationContext context) {
+		org.apache.http.impl.client.CloseableHttpClient httpClient4 = context
+				.getBean(org.apache.http.impl.client.CloseableHttpClient.class);
+		assertThat(httpClient4).isNotNull();
+		org.apache.http.conn.HttpClientConnectionManager connectionManager4 = context
+				.getBean(org.apache.http.conn.HttpClientConnectionManager.class);
+		assertThat(connectionManager4).isInstanceOf(
+				org.apache.http.impl.conn.PoolingHttpClientConnectionManager.class);
+		Client client = context.getBean(Client.class);
+		assertThat(client).isInstanceOf(ApacheHttpClient.class);
+	}
+
+	private static void verifyHc5BeansAvailable(ConfigurableApplicationContext context) {
+		CloseableHttpClient httpClient = context.getBean(CloseableHttpClient.class);
+		assertThat(httpClient).isNotNull();
+		HttpClientConnectionManager connectionManager = context
+				.getBean(HttpClientConnectionManager.class);
+		assertThat(connectionManager)
+				.isInstanceOf(PoolingHttpClientConnectionManager.class);
+		Client client = context.getBean(Client.class);
+		assertThat(client).isInstanceOf(ApacheHttp5Client.class);
+	}
+
+	@RunWith(ModifiedClassPathRunner.class)
+	@ClassPathExclusions("ribbon-loadbalancer-{version:\\d.*}.jar")
+	public static class WithoutLoadBalancerInClasspath {
+
+		@Test
+		public void verifyHttpClient5AutoConfig() {
+			ConfigurableApplicationContext context = new SpringApplicationBuilder()
+					.properties("feign.httpclient.hc5.enabled=true",
+							"feign.httpclient.enabled=false")
+					.web(WebApplicationType.NONE)
+					.sources(HttpClientConfiguration.class, FeignAutoConfiguration.class)
+					.run();
+
+			verifyHc5BeansAvailable(context);
+
+			if (context != null) {
+				context.close();
+			}
+		}
+
+		@Test
+		public void hc5ShouldWinIfTheBothVersionsAvailable() {
+			ConfigurableApplicationContext context = new SpringApplicationBuilder()
+					.properties("feign.httpclient.hc5.enabled=true",
+							"feign.httpclient.enabled=true")
+					.web(WebApplicationType.NONE)
+					.sources(HttpClientConfiguration.class, FeignAutoConfiguration.class)
+					.run();
+
+			Client client = context.getBean(Client.class);
+			assertThat(client).isInstanceOf(ApacheHttp5Client.class);
+
+			if (context != null) {
+				context.close();
+			}
+		}
+
+		@Test
+		public void hc4ShouldBeTheDefaultIfHc5NotEnabled() {
+			ConfigurableApplicationContext context = new SpringApplicationBuilder()
+					.properties("feign.httpclient.hc5.enabled=false",
+							"feign.httpclient.enabled=true")
+					.web(WebApplicationType.NONE)
+					.sources(HttpClientConfiguration.class, FeignAutoConfiguration.class)
+					.run();
+
+			verifyHc4BeansAvailable(context);
+
+			if (context != null) {
+				context.close();
+			}
+		}
+
+	}
+
+	@RunWith(ModifiedClassPathRunner.class)
+	@ClassPathExclusions({ "ribbon-loadbalancer-{version:\\d.*}.jar",
+			"feign-hc5-{version:\\d.*}.jar", "httpclient5-{version:\\d.*}.jar",
+			"httpcore5-{version:\\d.*}.jar", "httpcore5-h2-{version:\\d.*}.jar" })
+	public static class WithoutLoadBalancerAndHc5InClasspath {
+
+		@Test
+		public void hc4ShouldWinEvenHc5ConfigEnabled() {
+			ConfigurableApplicationContext context = new SpringApplicationBuilder()
+					.properties("feign.httpclient.hc5.enabled=true")
+					.web(WebApplicationType.NONE)
+					.sources(HttpClientConfiguration.class, FeignAutoConfiguration.class)
+					.run();
+
+			verifyHc4BeansAvailable(context);
+
+			if (context != null) {
+				context.close();
+			}
+		}
+
+		@Test
+		public void hc4ShouldBeTheDefault() {
+			ConfigurableApplicationContext context = new SpringApplicationBuilder()
+					.web(WebApplicationType.NONE)
+					.sources(HttpClientConfiguration.class, FeignAutoConfiguration.class)
+					.run();
+
+			verifyHc4BeansAvailable(context);
+
+			if (context != null) {
+				context.close();
+			}
+		}
+
+	}
+
+}

spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/FeignHttpClientUrlTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -23,10 +23,9 @@ import feign.Client;
 import feign.Feign;
 import feign.Target;
 import feign.httpclient.ApacheHttpClient;
-import org.junit.AfterClass;
+import org.junit.jupiter.api.AfterAll;
-import org.junit.BeforeClass;
+import org.junit.jupiter.api.BeforeAll;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
-import org.junit.runner.RunWith;
 
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
@@ -36,7 +35,6 @@ import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.Import;
 import org.springframework.test.annotation.DirtiesContext;
-import org.springframework.test.context.junit4.SpringRunner;
 import org.springframework.util.ReflectionUtils;
 import org.springframework.util.SocketUtils;
 import org.springframework.web.bind.annotation.RequestMapping;
@@ -48,14 +46,14 @@ import static org.springframework.boot.test.context.SpringBootTest.WebEnvironmen
 
 /**
  * @author Spencer Gibb
+ * @author Olga Maciaszek-Sharma
  */
-@RunWith(SpringRunner.class)
 @SpringBootTest(classes = FeignHttpClientUrlTests.TestConfig.class,
 		webEnvironment = DEFINED_PORT,
 		value = { "spring.application.name=feignclienturltest",
 				"feign.hystrix.enabled=false", "feign.okhttp.enabled=false" })
 @DirtiesContext
-public class FeignHttpClientUrlTests {
+class FeignHttpClientUrlTests {
 
 	static int port;
 
@@ -68,37 +66,37 @@ public class FeignHttpClientUrlTests {
 	@Autowired
 	private BeanUrlClient beanClient;
 
-	@BeforeClass
+	@BeforeAll
-	public static void beforeClass() {
+	static void beforeClass() {
 		port = SocketUtils.findAvailableTcpPort();
 		System.setProperty("server.port", String.valueOf(port));
 	}
 
-	@AfterClass
+	@AfterAll
-	public static void afterClass() {
+	static void afterClass() {
 		System.clearProperty("server.port");
 	}
 
 	@Test
-	public void testUrlHttpClient() {
+	void testUrlHttpClient() {
-		assertThat(this.urlClient).as("UrlClient was null").isNotNull();
+		assertThat(urlClient).as("UrlClient was null").isNotNull();
-		Hello hello = this.urlClient.getHello();
+		Hello hello = urlClient.getHello();
 		assertThat(hello).as("hello was null").isNotNull();
 		assertThat(hello).as("first hello didn't match")
 				.isEqualTo(new Hello("hello world 1"));
 	}
 
 	@Test
-	public void testBeanUrl() {
+	void testBeanUrl() {
-		Hello hello = this.beanClient.getHello();
+		Hello hello = beanClient.getHello();
 		assertThat(hello).as("hello was null").isNotNull();
 		assertThat(hello).as("first hello didn't match")
 				.isEqualTo(new Hello("hello world 1"));
 	}
 
 	@Test
-	public void testBeanUrlNoProtocol() {
+	void testBeanUrlNoProtocol() {
-		Hello hello = this.beanClientNoProtocol.getHello();
+		Hello hello = beanClientNoProtocol.getHello();
 		assertThat(hello).as("hello was null").isNotNull();
 		assertThat(hello).as("first hello didn't match")
 				.isEqualTo(new Hello("hello world 1"));
@@ -182,15 +180,16 @@ public class FeignHttpClientUrlTests {
 
 		private String message;
 
-		public Hello() {
+		Hello() {
+
 		}
 
-		public Hello(String message) {
+		Hello(String message) {
 			this.message = message;
 		}
 
 		public String getMessage() {
-			return this.message;
+			return message;
 		}
 
 		public void setMessage(String message) {
@@ -206,12 +205,12 @@ public class FeignHttpClientUrlTests {
 				return false;
 			}
 			Hello that = (Hello) o;
-			return Objects.equals(this.message, that.message);
+			return Objects.equals(message, that.message);
 		}
 
 		@Override
 		public int hashCode() {
-			return Objects.hash(this.message);
+			return Objects.hash(message);
 		}
 
 	}

spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/FeignHttpClientUrlTestsWithLoadBalancer.java

@@ -0,0 +1,221 @@
+/*
+ * Copyright 2013-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.cloud.openfeign;
+
+import java.lang.reflect.Field;
+import java.util.Objects;
+
+import feign.Client;
+import feign.Feign;
+import feign.Target;
+import feign.httpclient.ApacheHttpClient;
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.cloud.openfeign.test.NoSecurityConfiguration;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Import;
+import org.springframework.test.annotation.DirtiesContext;
+import org.springframework.util.ReflectionUtils;
+import org.springframework.util.SocketUtils;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestMethod;
+import org.springframework.web.bind.annotation.RestController;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.springframework.boot.test.context.SpringBootTest.WebEnvironment.DEFINED_PORT;
+
+/**
+ * @author Spencer Gibb
+ * @author Olga Maciaszek-Sharma
+ */
+@SpringBootTest(classes = FeignHttpClientUrlTestsWithLoadBalancer.TestConfig.class,
+		webEnvironment = DEFINED_PORT,
+		value = { "spring.application.name=feignclienturlwithloadbalancertest",
+				"feign.hystrix.enabled=false", "feign.okhttp.enabled=false",
+				"spring.cloud.loadbalancer.ribbon.enabled=false",
+				"spring.cloud.loadbalancer.retry.enabled=false" })
+@DirtiesContext
+class FeignHttpClientUrlTestsWithLoadBalancer {
+
+	static int port;
+
+	@Autowired
+	BeanUrlClientNoProtocol beanClientNoProtocol;
+
+	@Autowired
+	private UrlClient urlClient;
+
+	@Autowired
+	private BeanUrlClient beanClient;
+
+	@BeforeAll
+	static void beforeClass() {
+		port = SocketUtils.findAvailableTcpPort();
+		System.setProperty("server.port", String.valueOf(port));
+	}
+
+	@AfterAll
+	static void afterClass() {
+		System.clearProperty("server.port");
+	}
+
+	@Test
+	void testUrlHttpClient() {
+		assertThat(urlClient).as("UrlClient was null").isNotNull();
+		Hello hello = urlClient.getHello();
+		assertThat(hello).as("hello was null").isNotNull();
+		assertThat(hello).as("first hello didn't match")
+				.isEqualTo(new Hello("hello world 1"));
+	}
+
+	@Test
+	void testBeanUrl() {
+		Hello hello = beanClient.getHello();
+		assertThat(hello).as("hello was null").isNotNull();
+		assertThat(hello).as("first hello didn't match")
+				.isEqualTo(new Hello("hello world 1"));
+	}
+
+	@Test
+	void testBeanUrlNoProtocol() {
+		Hello hello = beanClientNoProtocol.getHello();
+		assertThat(hello).as("hello was null").isNotNull();
+		assertThat(hello).as("first hello didn't match")
+				.isEqualTo(new Hello("hello world 1"));
+	}
+
+	// this tests that
+	@FeignClient(name = "localappurl", url = "http://localhost:${server.port}/")
+	protected interface UrlClient {
+
+		@RequestMapping(method = RequestMethod.GET, value = "/hello")
+		Hello getHello();
+
+	}
+
+	@FeignClient(name = "beanappurl", url = "#{SERVER_URL}path")
+	protected interface BeanUrlClient {
+
+		@RequestMapping(method = RequestMethod.GET, value = "/hello")
+		Hello getHello();
+
+	}
+
+	@FeignClient(name = "beanappurlnoprotocol", url = "#{SERVER_URL_NO_PROTOCOL}path")
+	protected interface BeanUrlClientNoProtocol {
+
+		@RequestMapping(method = RequestMethod.GET, value = "/hello")
+		Hello getHello();
+
+	}
+
+	@Configuration(proxyBeanMethods = false)
+	@EnableAutoConfiguration
+	@RestController
+	@EnableFeignClients(clients = { UrlClient.class, BeanUrlClient.class,
+			BeanUrlClientNoProtocol.class })
+	@Import(NoSecurityConfiguration.class)
+	protected static class TestConfig {
+
+		@GetMapping("/hello")
+		public Hello getHello() {
+			return new Hello("hello world 1");
+		}
+
+		@GetMapping("/path/hello")
+		public Hello getHelloWithPath() {
+			return getHello();
+		}
+
+		@Bean(name = "SERVER_URL")
+		public String serverUrl() {
+			return "http://localhost:" + port + "/";
+		}
+
+		@Bean(name = "SERVER_URL_NO_PROTOCOL")
+		public String serverUrlNoProtocol() {
+			return "localhost:" + port + "/";
+		}
+
+		@Bean
+		public Targeter feignTargeter() {
+			return new Targeter() {
+				@Override
+				public <T> T target(FeignClientFactoryBean factory, Feign.Builder feign,
+						FeignContext context, Target.HardCodedTarget<T> target) {
+					Field field = ReflectionUtils.findField(Feign.Builder.class,
+							"client");
+					ReflectionUtils.makeAccessible(field);
+					Client client = (Client) ReflectionUtils.getField(field, feign);
+					if (target.name().equals("localappurl")) {
+						assertThat(client).isInstanceOf(ApacheHttpClient.class)
+								.as("client was wrong type");
+					}
+					return feign.target(target);
+				}
+			};
+		}
+
+	}
+
+	public static class Hello {
+
+		private String message;
+
+		Hello() {
+
+		}
+
+		Hello(String message) {
+			this.message = message;
+		}
+
+		public String getMessage() {
+			return message;
+		}
+
+		public void setMessage(String message) {
+			this.message = message;
+		}
+
+		@Override
+		public boolean equals(Object o) {
+			if (this == o) {
+				return true;
+			}
+			if (o == null || getClass() != o.getClass()) {
+				return false;
+			}
+			Hello that = (Hello) o;
+			return Objects.equals(message, that.message);
+		}
+
+		@Override
+		public int hashCode() {
+			return Objects.hash(message);
+		}
+
+	}
+
+}

spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/FeignHttpClientUrlTestsWithRetryableLoadBalancer.java

@@ -0,0 +1,221 @@
+/*
+ * Copyright 2013-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.cloud.openfeign;
+
+import java.lang.reflect.Field;
+import java.util.Objects;
+
+import feign.Client;
+import feign.Feign;
+import feign.Target;
+import feign.httpclient.ApacheHttpClient;
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.cloud.openfeign.test.NoSecurityConfiguration;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Import;
+import org.springframework.test.annotation.DirtiesContext;
+import org.springframework.util.ReflectionUtils;
+import org.springframework.util.SocketUtils;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestMethod;
+import org.springframework.web.bind.annotation.RestController;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.springframework.boot.test.context.SpringBootTest.WebEnvironment.DEFINED_PORT;
+
+/**
+ * @author Spencer Gibb
+ * @author Olga Maciaszek-Sharma
+ */
+@SpringBootTest(
+		classes = FeignHttpClientUrlTestsWithRetryableLoadBalancer.TestConfig.class,
+		webEnvironment = DEFINED_PORT,
+		value = { "spring.application.name=feignclienturlwithretryableloadbalancertest",
+				"feign.hystrix.enabled=false", "feign.okhttp.enabled=false",
+				"spring.cloud.loadbalancer.ribbon.enabled=false" })
+@DirtiesContext
+class FeignHttpClientUrlTestsWithRetryableLoadBalancer {
+
+	static int port;
+
+	@Autowired
+	BeanUrlClientNoProtocol beanClientNoProtocol;
+
+	@Autowired
+	private UrlClient urlClient;
+
+	@Autowired
+	private BeanUrlClient beanClient;
+
+	@BeforeAll
+	static void beforeClass() {
+		port = SocketUtils.findAvailableTcpPort();
+		System.setProperty("server.port", String.valueOf(port));
+	}
+
+	@AfterAll
+	static void afterClass() {
+		System.clearProperty("server.port");
+	}
+
+	@Test
+	void testUrlHttpClient() {
+		assertThat(urlClient).as("UrlClient was null").isNotNull();
+		Hello hello = urlClient.getHello();
+		assertThat(hello).as("hello was null").isNotNull();
+		assertThat(hello).as("first hello didn't match")
+				.isEqualTo(new Hello("hello world 1"));
+	}
+
+	@Test
+	void testBeanUrl() {
+		Hello hello = beanClient.getHello();
+		assertThat(hello).as("hello was null").isNotNull();
+		assertThat(hello).as("first hello didn't match")
+				.isEqualTo(new Hello("hello world 1"));
+	}
+
+	@Test
+	void testBeanUrlNoProtocol() {
+		Hello hello = beanClientNoProtocol.getHello();
+		assertThat(hello).as("hello was null").isNotNull();
+		assertThat(hello).as("first hello didn't match")
+				.isEqualTo(new Hello("hello world 1"));
+	}
+
+	// this tests that
+	@FeignClient(name = "localappurl", url = "http://localhost:${server.port}/")
+	protected interface UrlClient {
+
+		@RequestMapping(method = RequestMethod.GET, value = "/hello")
+		Hello getHello();
+
+	}
+
+	@FeignClient(name = "beanappurl", url = "#{SERVER_URL}path")
+	protected interface BeanUrlClient {
+
+		@RequestMapping(method = RequestMethod.GET, value = "/hello")
+		Hello getHello();
+
+	}
+
+	@FeignClient(name = "beanappurlnoprotocol", url = "#{SERVER_URL_NO_PROTOCOL}path")
+	protected interface BeanUrlClientNoProtocol {
+
+		@RequestMapping(method = RequestMethod.GET, value = "/hello")
+		Hello getHello();
+
+	}
+
+	@Configuration(proxyBeanMethods = false)
+	@EnableAutoConfiguration
+	@RestController
+	@EnableFeignClients(clients = { UrlClient.class, BeanUrlClient.class,
+			BeanUrlClientNoProtocol.class })
+	@Import(NoSecurityConfiguration.class)
+	protected static class TestConfig {
+
+		@GetMapping("/hello")
+		public Hello getHello() {
+			return new Hello("hello world 1");
+		}
+
+		@GetMapping("/path/hello")
+		public Hello getHelloWithPath() {
+			return getHello();
+		}
+
+		@Bean(name = "SERVER_URL")
+		public String serverUrl() {
+			return "http://localhost:" + port + "/";
+		}
+
+		@Bean(name = "SERVER_URL_NO_PROTOCOL")
+		public String serverUrlNoProtocol() {
+			return "localhost:" + port + "/";
+		}
+
+		@Bean
+		public Targeter feignTargeter() {
+			return new Targeter() {
+				@Override
+				public <T> T target(FeignClientFactoryBean factory, Feign.Builder feign,
+						FeignContext context, Target.HardCodedTarget<T> target) {
+					Field field = ReflectionUtils.findField(Feign.Builder.class,
+							"client");
+					ReflectionUtils.makeAccessible(field);
+					Client client = (Client) ReflectionUtils.getField(field, feign);
+					if (target.name().equals("localappurl")) {
+						assertThat(client).isInstanceOf(ApacheHttpClient.class)
+								.as("client was wrong type");
+					}
+					return feign.target(target);
+				}
+			};
+		}
+
+	}
+
+	public static class Hello {
+
+		private String message;
+
+		Hello() {
+
+		}
+
+		Hello(String message) {
+			this.message = message;
+		}
+
+		public String getMessage() {
+			return message;
+		}
+
+		public void setMessage(String message) {
+			this.message = message;
+		}
+
+		@Override
+		public boolean equals(Object o) {
+			if (this == o) {
+				return true;
+			}
+			if (o == null || getClass() != o.getClass()) {
+				return false;
+			}
+			Hello that = (Hello) o;
+			return Objects.equals(message, that.message);
+		}
+
+		@Override
+		public int hashCode() {
+			return Objects.hash(message);
+		}
+
+	}
+
+}

spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/SpringDecoderTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -32,7 +32,9 @@ import org.springframework.boot.test.context.SpringBootTest.WebEnvironment;
 import org.springframework.cloud.openfeign.test.NoSecurityConfiguration;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.Import;
+import org.springframework.http.HttpHeaders;
 import org.springframework.http.HttpStatus;
+import org.springframework.http.MediaType;
 import org.springframework.http.ResponseEntity;
 import org.springframework.test.annotation.DirtiesContext;
 import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
@@ -45,6 +47,7 @@ import static org.assertj.core.api.Assertions.assertThat;
 
 /**
  * @author Spencer Gibb
+ * @author Olga Maciaszek-Sharma
  */
 @RunWith(SpringJUnit4ClassRunner.class)
 @SpringBootTest(classes = SpringDecoderTests.Application.class,
@@ -152,6 +155,14 @@ public class SpringDecoderTests extends FeignClientFactoryBean {
 		assertThat(response.getBody()).as("response body was not null").isNull();
 	}
 
+	@Test
+	// Issue: https://github.com/spring-cloud/spring-cloud-openfeign/issues/456
+	public void testResponseEntityHeaders() {
+		ResponseEntity<String> response = testClient().getContentType();
+		assertThat(response.getHeaders().getContentType())
+				.isEqualTo(MediaType.APPLICATION_JSON);
+	}
+
 	protected interface TestClient {
 
 		@RequestMapping(method = RequestMethod.GET, value = "/helloresponse")
@@ -175,6 +186,9 @@ public class SpringDecoderTests extends FeignClientFactoryBean {
 		@GetMapping("/helloWildcard")
 		ResponseEntity<?> getWildcard();
 
+		@GetMapping(path = "/contentType", produces = MediaType.APPLICATION_JSON_VALUE)
+		ResponseEntity<String> getContentType();
+
 	}
 
 	public static class Hello {
@@ -262,6 +276,13 @@ public class SpringDecoderTests extends FeignClientFactoryBean {
 			return ResponseEntity.ok(new Hello("wildcard"));
 		}
 
+		@Override
+		public ResponseEntity<String> getContentType() {
+			return ResponseEntity.ok()
+					.header(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE)
+					.body("test");
+		}
+
 	}
 
 }

spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/circuitbreaker/CircuitBreakerTests.java

@@ -0,0 +1,246 @@
+/*
+ * Copyright 2013-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.cloud.openfeign.circuitbreaker;
+
+import java.util.function.Function;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.runner.RunWith;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.context.SpringBootTest.WebEnvironment;
+import org.springframework.cloud.client.circuitbreaker.CircuitBreaker;
+import org.springframework.cloud.client.circuitbreaker.CircuitBreakerFactory;
+import org.springframework.cloud.client.circuitbreaker.ConfigBuilder;
+import org.springframework.cloud.client.circuitbreaker.NoFallbackAvailableException;
+import org.springframework.cloud.openfeign.EnableFeignClients;
+import org.springframework.cloud.openfeign.FallbackFactory;
+import org.springframework.cloud.openfeign.FeignClient;
+import org.springframework.cloud.openfeign.test.NoSecurityConfiguration;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Import;
+import org.springframework.stereotype.Component;
+import org.springframework.test.annotation.DirtiesContext;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.util.SocketUtils;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestMethod;
+import org.springframework.web.bind.annotation.RestController;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * @author Spencer Gibb
+ */
+@RunWith(SpringJUnit4ClassRunner.class)
+@SpringBootTest(classes = CircuitBreakerTests.Application.class,
+		webEnvironment = WebEnvironment.DEFINED_PORT,
+		value = { "spring.application.name=springcircuittest", "spring.jmx.enabled=false",
+				"feign.circuitbreaker.enabled=true" })
+@DirtiesContext
+public class CircuitBreakerTests {
+
+	@Autowired
+	MyCircuitBreaker myCircuitBreaker;
+
+	@Autowired
+	TestClient testClient;
+
+	@Autowired
+	TestClientWithFactory testClientWithFactory;
+
+	@BeforeAll
+	public static void beforeClass() {
+		System.setProperty("server.port",
+				String.valueOf(SocketUtils.findAvailableTcpPort()));
+	}
+
+	@AfterAll
+	public static void afterClass() {
+		System.clearProperty("server.port");
+	}
+
+	@Before
+	public void setup() {
+		this.myCircuitBreaker.clear();
+	}
+
+	@Test
+	public void testSimpleTypeWithFallback() {
+		Hello hello = testClient.getHello();
+
+		assertThat(hello).as("hello was null").isNotNull();
+		assertThat(hello).as("first hello didn't match")
+				.isEqualTo(new Hello("hello world 1"));
+		assertThat(myCircuitBreaker.runWasCalled).as("Circuit Breaker was called")
+				.isTrue();
+	}
+
+	@Test
+	public void test404WithFallback() {
+		assertThat(testClient.getException()).isEqualTo("Fixed response");
+	}
+
+	@Test
+	public void testSimpleTypeWithFallbackFactory() {
+		Hello hello = testClientWithFactory.getHello();
+
+		assertThat(hello).as("hello was null").isNotNull();
+		assertThat(hello).as("first hello didn't match")
+				.isEqualTo(new Hello("hello world 1"));
+		assertThat(myCircuitBreaker.runWasCalled).as("Circuit Breaker was called")
+				.isTrue();
+	}
+
+	@Test
+	public void test404WithFallbackFactory() {
+		assertThat(testClientWithFactory.getException()).isEqualTo("Fixed response");
+	}
+
+	// tag::client_with_fallback[]
+	@FeignClient(name = "test", url = "http://localhost:${server.port}/",
+			fallback = Fallback.class)
+	protected interface TestClient {
+
+		@RequestMapping(method = RequestMethod.GET, value = "/hello")
+		Hello getHello();
+
+		@RequestMapping(method = RequestMethod.GET, value = "/hellonotfound")
+		String getException();
+
+	}
+
+	@Component
+	static class Fallback implements TestClient {
+
+		@Override
+		public Hello getHello() {
+			throw new NoFallbackAvailableException("Boom!", new RuntimeException());
+		}
+
+		@Override
+		public String getException() {
+			return "Fixed response";
+		}
+
+	}
+	// end::client_with_fallback[]
+
+	// tag::client_with_fallback_factory[]
+	@FeignClient(name = "testClientWithFactory", url = "http://localhost:${server.port}/",
+			fallbackFactory = TestFallbackFactory.class)
+	protected interface TestClientWithFactory {
+
+		@RequestMapping(method = RequestMethod.GET, value = "/hello")
+		Hello getHello();
+
+		@RequestMapping(method = RequestMethod.GET, value = "/hellonotfound")
+		String getException();
+
+	}
+
+	@Component
+	static class TestFallbackFactory implements FallbackFactory<FallbackWithFactory> {
+
+		@Override
+		public FallbackWithFactory create(Throwable cause) {
+			return new FallbackWithFactory();
+		}
+
+	}
+
+	static class FallbackWithFactory implements TestClientWithFactory {
+
+		@Override
+		public Hello getHello() {
+			throw new NoFallbackAvailableException("Boom!", new RuntimeException());
+		}
+
+		@Override
+		public String getException() {
+			return "Fixed response";
+		}
+
+	}
+	// end::client_with_fallback_factory[]
+
+	@Configuration(proxyBeanMethods = false)
+	@EnableAutoConfiguration
+	@RestController
+	@EnableFeignClients(clients = { TestClient.class, TestClientWithFactory.class })
+	@Import(NoSecurityConfiguration.class)
+	protected static class Application implements TestClient {
+
+		static final Log log = LogFactory.getLog(Application.class);
+
+		@Bean
+		MyCircuitBreaker myCircuitBreaker() {
+			return new MyCircuitBreaker();
+		}
+
+		@Bean
+		CircuitBreakerFactory circuitBreakerFactory(MyCircuitBreaker myCircuitBreaker) {
+			return new CircuitBreakerFactory() {
+				@Override
+				public CircuitBreaker create(String id) {
+					log.info("Creating a circuit breaker with id [" + id + "]");
+					return myCircuitBreaker;
+				}
+
+				@Override
+				protected ConfigBuilder configBuilder(String id) {
+					return Object::new;
+				}
+
+				@Override
+				public void configureDefault(Function defaultConfiguration) {
+
+				}
+			};
+		}
+
+		@Override
+		public Hello getHello() {
+			return new Hello("hello world 1");
+		}
+
+		@Override
+		public String getException() {
+			throw new IllegalStateException("BOOM!");
+		}
+
+		@Bean
+		Fallback fallback() {
+			return new Fallback();
+		}
+
+		@Bean
+		TestFallbackFactory testFallbackFactory() {
+			return new TestFallbackFactory();
+		}
+
+	}
+
+}

spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/circuitbreaker/CircuitBreakerWithNoFallbackTests.java

@@ -0,0 +1,159 @@
+/*
+ * Copyright 2013-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.cloud.openfeign.circuitbreaker;
+
+import java.util.function.Function;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.cloud.client.circuitbreaker.CircuitBreaker;
+import org.springframework.cloud.client.circuitbreaker.CircuitBreakerFactory;
+import org.springframework.cloud.client.circuitbreaker.ConfigBuilder;
+import org.springframework.cloud.client.circuitbreaker.NoFallbackAvailableException;
+import org.springframework.cloud.openfeign.EnableFeignClients;
+import org.springframework.cloud.openfeign.FeignClient;
+import org.springframework.cloud.openfeign.test.NoSecurityConfiguration;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Import;
+import org.springframework.test.annotation.DirtiesContext;
+import org.springframework.util.SocketUtils;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestMethod;
+import org.springframework.web.bind.annotation.RestController;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
+
+/**
+ * Tests for Feign calls with CircuitBreaker, without fallbacks.
+ *
+ * @author Olga Maciaszek-Sharma
+ */
+@SpringBootTest(classes = CircuitBreakerWithNoFallbackTests.Application.class,
+		webEnvironment = SpringBootTest.WebEnvironment.DEFINED_PORT,
+		value = { "spring.application.name=springcircuittest", "spring.jmx.enabled=false",
+				"feign.circuitbreaker.enabled=true" })
+@DirtiesContext
+public class CircuitBreakerWithNoFallbackTests {
+
+	@Autowired
+	MyCircuitBreaker myCircuitBreaker;
+
+	@Autowired
+	CircuitBreakerTestClient testClient;
+
+	@BeforeAll
+	public static void beforeClass() {
+		System.setProperty("server.port",
+				String.valueOf(SocketUtils.findAvailableTcpPort()));
+	}
+
+	@AfterAll
+	public static void afterClass() {
+		System.clearProperty("server.port");
+	}
+
+	@BeforeEach
+	public void setup() {
+		this.myCircuitBreaker.clear();
+	}
+
+	@Test
+	public void testSimpleTypeWithFallback() {
+		Hello hello = testClient.getHello();
+
+		assertThat(hello).as("hello was null").isNotNull();
+		assertThat(hello).as("first hello didn't match")
+				.isEqualTo(new Hello("hello world 1"));
+		assertThat(myCircuitBreaker.runWasCalled).as("Circuit Breaker was called")
+				.isTrue();
+	}
+
+	@Test
+	public void test404WithoutFallback() {
+		assertThatThrownBy(() -> testClient.getException())
+				.isInstanceOf(NoFallbackAvailableException.class);
+	}
+
+	@FeignClient(name = "test", url = "http://localhost:${server.port}/")
+	protected interface CircuitBreakerTestClient {
+
+		@RequestMapping(method = RequestMethod.GET, value = "/hello")
+		Hello getHello();
+
+		@RequestMapping(method = RequestMethod.GET, value = "/hellonotfound")
+		String getException();
+
+	}
+
+	@Configuration(proxyBeanMethods = false)
+	@EnableAutoConfiguration
+	@RestController
+	@EnableFeignClients(clients = { CircuitBreakerTestClient.class })
+	@Import(NoSecurityConfiguration.class)
+	protected static class Application implements CircuitBreakerTestClient {
+
+		static final Log log = LogFactory.getLog(Application.class);
+
+		@Bean
+		MyCircuitBreaker myCircuitBreaker() {
+			return new MyCircuitBreaker();
+		}
+
+		@Bean
+		CircuitBreakerFactory circuitBreakerFactory(MyCircuitBreaker myCircuitBreaker) {
+			return new CircuitBreakerFactory() {
+				@Override
+				public CircuitBreaker create(String id) {
+					log.info("Creating a circuit breaker with id [" + id + "]");
+					return myCircuitBreaker;
+				}
+
+				@Override
+				protected ConfigBuilder configBuilder(String id) {
+					return Object::new;
+				}
+
+				@Override
+				public void configureDefault(Function defaultConfiguration) {
+
+				}
+			};
+		}
+
+		@Override
+		public Hello getHello() {
+			return new Hello("hello world 1");
+		}
+
+		@Override
+		public String getException() {
+			throw new IllegalStateException("BOOM!");
+		}
+
+	}
+
+}

spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/circuitbreaker/Hello.java

@@ -0,0 +1,60 @@
+/*
+ * Copyright 2013-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.cloud.openfeign.circuitbreaker;
+
+import java.util.Objects;
+
+/**
+ * @author Marcin Grzejszczak
+ */
+class Hello {
+
+	private String message;
+
+	public Hello() {
+	}
+
+	public Hello(String message) {
+		this.message = message;
+	}
+
+	public String getMessage() {
+		return this.message;
+	}
+
+	public void setMessage(String message) {
+		this.message = message;
+	}
+
+	@Override
+	public boolean equals(Object o) {
+		if (this == o) {
+			return true;
+		}
+		if (o == null || getClass() != o.getClass()) {
+			return false;
+		}
+		Hello that = (Hello) o;
+		return Objects.equals(this.message, that.message);
+	}
+
+	@Override
+	public int hashCode() {
+		return Objects.hash(this.message);
+	}
+
+}

spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/circuitbreaker/MyCircuitBreaker.java

@@ -0,0 +1,59 @@
+/*
+ * Copyright 2013-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.cloud.openfeign.circuitbreaker;
+
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.function.Function;
+import java.util.function.Supplier;
+
+import org.springframework.cloud.client.circuitbreaker.CircuitBreaker;
+import org.springframework.cloud.client.circuitbreaker.NoFallbackAvailableException;
+
+/**
+ * @author Marcin Grzejszczak
+ * @author Olga Maciaszek-Sharma
+ */
+class MyCircuitBreaker implements CircuitBreaker {
+
+	AtomicBoolean runWasCalled = new AtomicBoolean();
+
+	@Override
+	public <T> T run(Supplier<T> toRun) {
+		try {
+			this.runWasCalled.set(true);
+			return toRun.get();
+		}
+		catch (Throwable throwable) {
+			throw new NoFallbackAvailableException("No fallback available.", throwable);
+		}
+	}
+
+	@Override
+	public <T> T run(Supplier<T> toRun, Function<Throwable, T> fallback) {
+		try {
+			return run(toRun);
+		}
+		catch (Throwable throwable) {
+			return fallback.apply(throwable);
+		}
+	}
+
+	public void clear() {
+		this.runWasCalled.set(false);
+	}
+
+}

spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/encoding/FeignPageableEncodingTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -17,6 +17,7 @@
 package org.springframework.cloud.openfeign.encoding;
 
 import java.util.Collections;
+import java.util.List;
 import java.util.Optional;
 
 import com.netflix.loadbalancer.BaseLoadBalancer;
@@ -32,7 +33,6 @@ import org.springframework.boot.autoconfigure.data.rest.RepositoryRestMvcAutoCon
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.cloud.netflix.ribbon.RibbonClient;
 import org.springframework.cloud.openfeign.EnableFeignClients;
-import org.springframework.cloud.openfeign.FeignClientsConfiguration;
 import org.springframework.cloud.openfeign.encoding.app.client.InvoiceClient;
 import org.springframework.cloud.openfeign.encoding.app.domain.Invoice;
 import org.springframework.cloud.openfeign.test.NoSecurityConfiguration;
@@ -55,10 +55,12 @@ import static org.springframework.boot.test.context.SpringBootTest.WebEnvironmen
  * Tests the pagination encoding.
  *
  * @author Charlie Mordant.
+ * @author Hyeonmin Park
  */
 @SpringBootTest(classes = FeignPageableEncodingTests.Application.class,
 		webEnvironment = RANDOM_PORT,
 		value = { "feign.compression.request.enabled=true",
+				"feign.autoconfiguration.jackson.enabled=true",
 				"hystrix.command.default.execution.isolation.strategy=SEMAPHORE",
 				"ribbon.OkToRetryOnAllOperations=false" })
 @RunWith(SpringJUnit4ClassRunner.class)
@@ -69,7 +71,6 @@ public class FeignPageableEncodingTests {
 
 	@Test
 	public void testPageable() {
-
 		// given
 		Pageable pageable = PageRequest.of(0, 10, Sort.Direction.ASC, "sortProperty");
 
@@ -90,7 +91,191 @@ public class FeignPageableEncodingTests {
 			assertThat(order.getDirection()).isEqualTo(Sort.Direction.ASC);
 			assertThat(order.getProperty()).isEqualTo("sortProperty");
 		}
+	}
 
+	@Test
+	public void testPageableWithDescDirection() {
+		// given
+		Pageable pageable = PageRequest.of(0, 10, Sort.Direction.DESC, "sortProperty");
+
+		// when
+		final ResponseEntity<Page<Invoice>> response = this.invoiceClient
+				.getInvoicesPaged(pageable);
+
+		// then
+		assertThat(response).isNotNull();
+		assertThat(response.getStatusCode()).isEqualTo(HttpStatus.OK);
+		assertThat(response.getBody()).isNotNull();
+		assertThat(pageable.getPageSize()).isEqualTo(response.getBody().getSize());
+
+		Sort sort = response.getBody().getPageable().getSort();
+		assertThat(sort).hasSize(1);
+		assertThat(sort.get()).hasSize(1);
+
+		Optional<Sort.Order> optionalOrder = sort.get().findFirst();
+		assertThat(optionalOrder.isPresent()).isTrue();
+
+		Sort.Order order = optionalOrder.get();
+		assertThat(order.getDirection()).isEqualTo(Sort.Direction.DESC);
+		assertThat(order.getProperty()).isEqualTo("sortProperty");
+	}
+
+	@Test
+	public void testPageableWithMultipleSort() {
+		// given
+		Pageable pageable = PageRequest.of(0, 10, Sort
+				.by(Sort.Order.desc("sortProperty1"), Sort.Order.asc("sortProperty2")));
+
+		// when
+		final ResponseEntity<Page<Invoice>> response = this.invoiceClient
+				.getInvoicesPaged(pageable);
+
+		// then
+		assertThat(response).isNotNull();
+		assertThat(response.getStatusCode()).isEqualTo(HttpStatus.OK);
+		assertThat(response.getBody()).isNotNull();
+		assertThat(pageable.getPageSize()).isEqualTo(response.getBody().getSize());
+
+		Sort sort = response.getBody().getPageable().getSort();
+		assertThat(sort).hasSize(2);
+
+		List<Sort.Order> orderList = sort.toList();
+		assertThat(orderList).hasSize(2);
+
+		Sort.Order firstOrder = orderList.get(0);
+		assertThat(firstOrder.getDirection()).isEqualTo(Sort.Direction.DESC);
+		assertThat(firstOrder.getProperty()).isEqualTo("sortProperty1");
+
+		Sort.Order secondOrder = orderList.get(1);
+		assertThat(secondOrder.getDirection()).isEqualTo(Sort.Direction.ASC);
+		assertThat(secondOrder.getProperty()).isEqualTo("sortProperty2");
+	}
+
+	@Test
+	public void testPageableWithoutSort() {
+		// given
+		Pageable pageable = PageRequest.of(0, 10);
+
+		// when
+		final ResponseEntity<Page<Invoice>> response = this.invoiceClient
+				.getInvoicesPaged(pageable);
+
+		// then
+		assertThat(response).isNotNull();
+		assertThat(response.getStatusCode()).isEqualTo(HttpStatus.OK);
+		assertThat(response.getBody()).isNotNull();
+		assertThat(pageable.getPageSize()).isEqualTo(response.getBody().getSize());
+		assertThat(response.getBody().getPageable().getSort().isSorted()).isFalse();
+
+		List<Invoice> invoiceList = response.getBody().getContent();
+		assertThat(invoiceList).hasSizeGreaterThanOrEqualTo(1);
+	}
+
+	@Test
+	public void testPageableWithoutSortWithBody() {
+		// given
+		Pageable pageable = PageRequest.of(0, 10);
+
+		// when
+		final ResponseEntity<Page<Invoice>> response = this.invoiceClient
+				.getInvoicesPagedWithBody(pageable, "InvoiceTitleFromBody");
+
+		// then
+		assertThat(response).isNotNull();
+		assertThat(response.getStatusCode()).isEqualTo(HttpStatus.OK);
+		assertThat(response.getBody()).isNotNull();
+		assertThat(pageable.getPageSize()).isEqualTo(response.getBody().getSize());
+
+		List<Invoice> invoiceList = response.getBody().getContent();
+		assertThat(invoiceList).hasSizeGreaterThanOrEqualTo(1);
+
+		Invoice firstInvoice = invoiceList.get(0);
+		assertThat(firstInvoice.getTitle()).startsWith("InvoiceTitleFromBody");
+	}
+
+	@Test
+	public void testPageableWithBody() {
+		// given
+		Pageable pageable = PageRequest.of(0, 10, Sort
+				.by(Sort.Order.desc("sortProperty1"), Sort.Order.asc("sortProperty2")));
+
+		// when
+		final ResponseEntity<Page<Invoice>> response = this.invoiceClient
+				.getInvoicesPagedWithBody(pageable, "InvoiceTitleFromBody");
+
+		// then
+		assertThat(response).isNotNull();
+		assertThat(response.getStatusCode()).isEqualTo(HttpStatus.OK);
+		assertThat(response.getBody()).isNotNull();
+		assertThat(pageable.getPageSize()).isEqualTo(response.getBody().getSize());
+
+		List<Invoice> invoiceList = response.getBody().getContent();
+		assertThat(invoiceList).hasSizeGreaterThanOrEqualTo(1);
+
+		Invoice firstInvoice = invoiceList.get(0);
+		assertThat(firstInvoice.getTitle()).startsWith("InvoiceTitleFromBody");
+
+		Sort sort = response.getBody().getPageable().getSort();
+		assertThat(sort).hasSize(2);
+
+		List<Sort.Order> orderList = sort.toList();
+		assertThat(orderList).hasSize(2);
+
+		Sort.Order firstOrder = orderList.get(0);
+		assertThat(firstOrder.getDirection()).isEqualTo(Sort.Direction.DESC);
+		assertThat(firstOrder.getProperty()).isEqualTo("sortProperty1");
+
+		Sort.Order secondOrder = orderList.get(1);
+		assertThat(secondOrder.getDirection()).isEqualTo(Sort.Direction.ASC);
+		assertThat(secondOrder.getProperty()).isEqualTo("sortProperty2");
+	}
+
+	@Test
+	public void testUnpagedWithBody() {
+		// given
+		Pageable unpaged = Pageable.unpaged();
+
+		// when
+		final ResponseEntity<Page<Invoice>> response = this.invoiceClient
+				.getInvoicesPagedWithBody(unpaged, "InvoiceTitleFromBody");
+
+		// then
+		assertThat(response).isNotNull();
+		assertThat(response.getStatusCode()).isEqualTo(HttpStatus.OK);
+		assertThat(response.getBody()).isNotNull();
+
+		List<Invoice> invoiceList = response.getBody().getContent();
+		assertThat(invoiceList).hasSizeGreaterThanOrEqualTo(1);
+
+		Invoice firstInvoice = invoiceList.get(0);
+		assertThat(firstInvoice.getTitle()).startsWith("InvoiceTitleFromBody");
+	}
+
+	@Test
+	public void testSortWithBody() {
+		// given
+		Sort sort = Sort.by(Sort.Order.desc("amount"));
+
+		// when
+		final ResponseEntity<Page<Invoice>> response = this.invoiceClient
+				.getInvoicesSortedWithBody(sort, "InvoiceTitleFromBody");
+
+		// then
+		assertThat(response).isNotNull();
+		assertThat(response.getStatusCode()).isEqualTo(HttpStatus.OK);
+		assertThat(response.getBody()).isNotNull();
+		assertThat(sort).isEqualTo(response.getBody().getSort());
+
+		List<Invoice> invoiceList = response.getBody().getContent();
+		assertThat(invoiceList).hasSizeGreaterThanOrEqualTo(1);
+
+		Invoice firstInvoice = invoiceList.get(0);
+		assertThat(firstInvoice.getTitle()).startsWith("InvoiceTitleFromBody");
+
+		for (int ind = 0; ind < invoiceList.size() - 1; ind++) {
+			assertThat(invoiceList.get(ind).getAmount())
+					.isGreaterThanOrEqualTo(invoiceList.get(ind + 1).getAmount());
+		}
 	}
 
 	@EnableFeignClients(clients = InvoiceClient.class)
@@ -99,7 +284,7 @@ public class FeignPageableEncodingTests {
 			scanBasePackages = "org.springframework.cloud.openfeign.encoding.app",
 			exclude = { RepositoryRestMvcAutoConfiguration.class })
 	@EnableSpringDataWebSupport
-	@Import({ NoSecurityConfiguration.class, FeignClientsConfiguration.class })
+	@Import({ NoSecurityConfiguration.class })
 	public static class Application {
 
 	}

spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/encoding/app/client/InvoiceClient.java

@@ -19,10 +19,12 @@ package org.springframework.cloud.openfeign.encoding.app.client;
 import java.util.List;
 
 import org.springframework.cloud.openfeign.FeignClient;
+import org.springframework.cloud.openfeign.SpringQueryMap;
 import org.springframework.cloud.openfeign.encoding.app.domain.Invoice;
 import org.springframework.data.domain.Page;
 import org.springframework.http.MediaType;
 import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestMethod;
 
@@ -30,6 +32,7 @@ import org.springframework.web.bind.annotation.RequestMethod;
  * Simple Feign client for retrieving the invoice list.
  *
  * @author Jakub Narloch
+ * @author Hyeonmin Park
  */
 @FeignClient("local")
 public interface InvoiceClient {
@@ -39,6 +42,20 @@ public interface InvoiceClient {
 	ResponseEntity<Page<Invoice>> getInvoicesPaged(
 			org.springframework.data.domain.Pageable pageable);
 
+	@RequestMapping(value = "invoicesPagedWithBody", method = RequestMethod.POST,
+			consumes = MediaType.APPLICATION_JSON_VALUE,
+			produces = MediaType.APPLICATION_JSON_VALUE)
+	ResponseEntity<Page<Invoice>> getInvoicesPagedWithBody(
+			@SpringQueryMap org.springframework.data.domain.Pageable pageable,
+			@RequestBody String titlePrefix);
+
+	@RequestMapping(value = "invoicesSortedWithBody", method = RequestMethod.POST,
+			consumes = MediaType.APPLICATION_JSON_VALUE,
+			produces = MediaType.APPLICATION_JSON_VALUE)
+	ResponseEntity<Page<Invoice>> getInvoicesSortedWithBody(
+			@SpringQueryMap org.springframework.data.domain.Sort sort,
+			@RequestBody String titlePrefix);
+
 	@RequestMapping(value = "invoices", method = RequestMethod.GET,
 			produces = MediaType.APPLICATION_JSON_VALUE)
 	ResponseEntity<List<Invoice>> getInvoices();

spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/encoding/app/resource/InvoiceResource.java

@@ -18,12 +18,14 @@ package org.springframework.cloud.openfeign.encoding.app.resource;
 
 import java.math.BigDecimal;
 import java.util.ArrayList;
+import java.util.Comparator;
 import java.util.List;
 import java.util.Locale;
 
 import org.springframework.cloud.openfeign.encoding.app.domain.Invoice;
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.PageImpl;
+import org.springframework.data.domain.PageRequest;
 import org.springframework.http.MediaType;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.RequestBody;
@@ -35,6 +37,7 @@ import org.springframework.web.bind.annotation.RestController;
  * An sample REST controller, that potentially returns large response - used for testing.
  *
  * @author Jakub Narloch
+ * @author Hyeonmin Park
  */
 @RestController
 public class InvoiceResource {
@@ -43,7 +46,7 @@ public class InvoiceResource {
 			produces = MediaType.APPLICATION_JSON_VALUE)
 	public ResponseEntity<List<Invoice>> getInvoices() {
 
-		return ResponseEntity.ok(createInvoiceList(100));
+		return ResponseEntity.ok(createInvoiceList(null, 100, null));
 	}
 
 	@RequestMapping(value = "invoices", method = RequestMethod.POST,
@@ -58,20 +61,76 @@ public class InvoiceResource {
 			produces = MediaType.APPLICATION_JSON_VALUE)
 	public ResponseEntity<Page<Invoice>> getInvoicesPaged(
 			org.springframework.data.domain.Pageable pageable) {
-		Page<Invoice> page = new PageImpl<>(createInvoiceList(pageable.getPageSize()),
+		Page<Invoice> page = new PageImpl<>(
+				createInvoiceList(null, pageable.getPageSize(), pageable.getSort()),
 				pageable, 100);
 		return ResponseEntity.ok(page);
 	}
 
-	private List<Invoice> createInvoiceList(int count) {
+	@RequestMapping(value = "invoicesPagedWithBody", method = RequestMethod.POST,
+			consumes = MediaType.APPLICATION_JSON_VALUE,
+			produces = MediaType.APPLICATION_JSON_VALUE)
+	public ResponseEntity<Page<Invoice>> getInvoicesPagedWithBody(
+			org.springframework.data.domain.Pageable pageable,
+			@RequestBody String titlePrefix) {
+		Page<Invoice> page = new PageImpl<>(createInvoiceList(titlePrefix,
+				pageable.getPageSize(), pageable.getSort()), pageable, 100);
+		return ResponseEntity.ok(page);
+	}
+
+	@RequestMapping(value = "invoicesSortedWithBody", method = RequestMethod.POST,
+			consumes = MediaType.APPLICATION_JSON_VALUE,
+			produces = MediaType.APPLICATION_JSON_VALUE)
+	public ResponseEntity<Page<Invoice>> getInvoicesSortedWithBody(
+			org.springframework.data.domain.Sort sort, @RequestBody String titlePrefix) {
+		Page<Invoice> page = new PageImpl<>(createInvoiceList(titlePrefix, 100, sort),
+				PageRequest.of(0, 100, sort), 100);
+		return ResponseEntity.ok(page);
+	}
+
+	private List<Invoice> createInvoiceList(String titlePrefix, int count,
+			org.springframework.data.domain.Sort sort) {
+		if (titlePrefix == null) {
+			titlePrefix = "Invoice";
+		}
 		final List<Invoice> invoices = new ArrayList<>();
 		for (int ind = 0; ind < count; ind++) {
 			final Invoice invoice = new Invoice();
-			invoice.setTitle("Invoice " + (ind + 1));
+			invoice.setTitle(titlePrefix + " " + (ind + 1));
 			invoice.setAmount(new BigDecimal(
 					String.format(Locale.US, "%.2f", Math.random() * 1000)));
 			invoices.add(invoice);
 		}
+		if (sort != null) {
+			Comparator<Invoice> comparatorForSort = null;
+			for (org.springframework.data.domain.Sort.Order order : sort) {
+				Comparator<Invoice> comparatorForOrder;
+				if (order.getProperty().equals("title")) {
+					comparatorForOrder = Comparator.comparing(Invoice::getTitle);
+				}
+				else if (order.getProperty().equals("amount")) {
+					comparatorForOrder = Comparator.comparing(Invoice::getAmount);
+				}
+				else {
+					continue;
+				}
+
+				if (order.isDescending()) {
+					comparatorForOrder = comparatorForOrder.reversed();
+				}
+
+				if (comparatorForSort == null) {
+					comparatorForSort = comparatorForOrder;
+				}
+				else {
+					comparatorForSort = comparatorForSort
+							.thenComparing(comparatorForOrder);
+				}
+			}
+			if (comparatorForSort != null) {
+				invoices.sort(comparatorForSort);
+			}
+		}
 		return invoices;
 	}
 

spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/encoding/proto/ProtobufNotInClasspathTest.java

@@ -20,7 +20,6 @@ import feign.RequestTemplate;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
-import org.springframework.beans.BeansException;
 import org.springframework.beans.factory.ObjectFactory;
 import org.springframework.boot.autoconfigure.http.HttpMessageConverters;
 import org.springframework.cloud.openfeign.support.SpringEncoder;
@@ -41,12 +40,8 @@ public class ProtobufNotInClasspathTest {
 
 	@Test
 	public void testEncodeWhenProtobufNotInClasspath() {
-		ObjectFactory<HttpMessageConverters> converters = new ObjectFactory<HttpMessageConverters>() {
+		ObjectFactory<HttpMessageConverters> converters = () -> new HttpMessageConverters(
-			@Override
+				new StringHttpMessageConverter());
-			public HttpMessageConverters getObject() throws BeansException {
-				return new HttpMessageConverters(new StringHttpMessageConverter());
-			}
-		};
 		RequestTemplate requestTemplate = new RequestTemplate();
 		requestTemplate.method(POST);
 		new SpringEncoder(converters).encode("a=b", String.class, requestTemplate);

spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/encoding/proto/ProtobufSpringEncoderTest.java

@@ -40,11 +40,9 @@ import org.junit.runner.RunWith;
 import org.mockito.ArgumentMatchers;
 import org.mockito.BDDMockito;
 import org.mockito.Mock;
-import org.mockito.invocation.InvocationOnMock;
 import org.mockito.junit.MockitoJUnitRunner;
 import org.mockito.stubbing.Answer;
 
-import org.springframework.beans.BeansException;
 import org.springframework.beans.factory.ObjectFactory;
 import org.springframework.boot.autoconfigure.http.HttpMessageConverters;
 import org.springframework.cloud.openfeign.support.SpringEncoder;
@@ -73,7 +71,7 @@ public class ProtobufSpringEncoderTest {
 			.build();
 
 	@Test
-	public void testProtobuf() throws IOException, URISyntaxException {
+	public void testProtobuf() throws IOException {
 		// protobuf convert to request by feign and ProtobufHttpMessageConverter
 		RequestTemplate requestTemplate = newRequestTemplate();
 		newEncoder().encode(this.request, Request.class, requestTemplate);
@@ -110,12 +108,8 @@ public class ProtobufSpringEncoderTest {
 	}
 
 	private SpringEncoder newEncoder() {
-		ObjectFactory<HttpMessageConverters> converters = new ObjectFactory<HttpMessageConverters>() {
+		ObjectFactory<HttpMessageConverters> converters = () -> new HttpMessageConverters(
-			@Override
+				new ProtobufHttpMessageConverter());
-			public HttpMessageConverters getObject() throws BeansException {
-				return new HttpMessageConverters(new ProtobufHttpMessageConverter());
-			}
-		};
 		return new SpringEncoder(converters);
 	}
 
@@ -126,17 +120,13 @@ public class ProtobufSpringEncoderTest {
 	}
 
 	private HttpEntity toApacheHttpEntity(RequestTemplate requestTemplate)
-			throws IOException, URISyntaxException {
+			throws IOException {
 		final List<HttpUriRequest> request = new ArrayList<>(1);
-		BDDMockito.given(this.httpClient.execute(ArgumentMatchers.<HttpUriRequest>any()))
+		BDDMockito.given(this.httpClient.execute(ArgumentMatchers.any()))
-				.will(new Answer<HttpResponse>() {
+				.will((Answer<HttpResponse>) invocationOnMock -> {
-					@Override
+					request.add((HttpUriRequest) invocationOnMock.getArguments()[0]);
-					public HttpResponse answer(InvocationOnMock invocationOnMock)
+					return new BasicHttpResponse(new BasicStatusLine(
-							throws Throwable {
+							new ProtocolVersion("http", 1, 1), 200, null));
-						request.add((HttpUriRequest) invocationOnMock.getArguments()[0]);
-						return new BasicHttpResponse(new BasicStatusLine(
-								new ProtocolVersion("http", 1, 1), 200, null));
-					}
 				});
 		new ApacheHttpClient(this.httpClient).execute(
 				requestTemplate.resolve(new HashMap<>()).request(),

spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/feignclientsregistrar/TopLevelClient.java

@@ -0,0 +1,28 @@
+/*
+ * Copyright 2013-2020 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.cloud.openfeign.feignclientsregistrar;
+
+import org.springframework.cloud.openfeign.FeignClient;
+
+/**
+ * @author Michal Domagala
+ */
+
+@FeignClient("top-level")
+public interface TopLevelClient {
+
+}

spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/feignclientsregistrar/sub/SubLevelClient.java

@@ -0,0 +1,28 @@
+/*
+ * Copyright 2013-2020 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.cloud.openfeign.feignclientsregistrar.sub;
+
+import org.springframework.cloud.openfeign.FeignClient;
+
+/**
+ * @author Michal Domagala
+ */
+
+@FeignClient("sub-level")
+public interface SubLevelClient {
+
+}

spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/hateoas/FeignHalAutoConfigurationTests.java

@@ -16,7 +16,7 @@
 
 package org.springframework.cloud.openfeign.hateoas;
 
-import java.util.Arrays;
+import java.util.Collections;
 
 import com.fasterxml.jackson.databind.ObjectMapper;
 import org.junit.Test;
@@ -26,9 +26,11 @@ import org.mockito.Mock;
 import org.mockito.junit.MockitoJUnitRunner;
 
 import org.springframework.beans.factory.ObjectProvider;
+import org.springframework.beans.factory.support.DefaultListableBeanFactory;
 import org.springframework.hateoas.mediatype.MessageResolver;
 import org.springframework.hateoas.mediatype.hal.CurieProvider;
 import org.springframework.hateoas.mediatype.hal.HalConfiguration;
+import org.springframework.hateoas.mediatype.hal.HalMediaTypeConfiguration;
 import org.springframework.hateoas.mediatype.hal.Jackson2HalModule;
 import org.springframework.hateoas.server.LinkRelationProvider;
 import org.springframework.hateoas.server.mvc.TypeConstrainedMappingJackson2HttpMessageConverter;
@@ -45,20 +47,20 @@ import static org.springframework.hateoas.MediaTypes.HAL_JSON;
 @RunWith(MockitoJUnitRunner.class)
 public class FeignHalAutoConfigurationTests {
 
-	@Mock
-	private ObjectProvider<ObjectMapper> objectMapper;
-
 	@Mock
 	private ObjectProvider<HalConfiguration> halConfiguration;
 
 	@Mock
-	private ObjectProvider<LinkRelationProvider> relProvider;
+	private ObjectProvider<ObjectMapper> objectMapper;
+
+	@Mock
+	private LinkRelationProvider relProvider;
 
 	@Mock
 	private ObjectProvider<CurieProvider> curieProvider;
 
 	@Mock
-	private ObjectProvider<MessageResolver> messageResolver;
+	private MessageResolver messageResolver;
 
 	@InjectMocks
 	private FeignHalAutoConfiguration feignHalAutoConfiguration;
@@ -70,17 +72,19 @@ public class FeignHalAutoConfigurationTests {
 
 		when(halConfiguration.getIfAvailable(any()))
 				.thenReturn(mock(HalConfiguration.class));
-		when(relProvider.getIfAvailable()).thenReturn(mock(LinkRelationProvider.class));
 		when(curieProvider.getIfAvailable(any())).thenReturn(mock(CurieProvider.class));
-		when(messageResolver.getIfAvailable()).thenReturn(mock(MessageResolver.class));
+
+		HalMediaTypeConfiguration halMediaTypeConfiguration = new HalMediaTypeConfiguration(
+				relProvider, curieProvider, halConfiguration, messageResolver,
+				new DefaultListableBeanFactory());
 
 		TypeConstrainedMappingJackson2HttpMessageConverter converter = feignHalAutoConfiguration
-				.halJacksonHttpMessageConverter(objectMapper, halConfiguration,
+				.halJacksonHttpMessageConverter(objectMapper, halMediaTypeConfiguration);
-						messageResolver, curieProvider, relProvider);
 
 		assertThat(converter).isNotNull();
 		assertThat(converter.getObjectMapper()).isNotNull();
-		assertThat(converter.getSupportedMediaTypes()).isEqualTo(Arrays.asList(HAL_JSON));
+		assertThat(converter.getSupportedMediaTypes())
+				.isEqualTo(Collections.singletonList(HAL_JSON));
 
 		assertThat(Jackson2HalModule.isAlreadyRegisteredIn(converter.getObjectMapper()))
 				.isTrue();

spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/loadbalancer/FeignBlockingLoadBalancerClientTests.java

@@ -54,7 +54,7 @@ import static org.mockito.Mockito.when;
  * {@link FeignBlockingLoadBalancerClient} and its delegates.
  *
  * @see <a href=
- * "https://github.com/spring-cloud/spring-cloud-commons/blob/master/spring-cloud-loadbalancer/src/test/java/org/springframework/cloud/loadbalancer/blocking/client/BlockingLoadBalancerClientTests.java">BlockingLoadBalancerClientTests</a>
+ * "https://github.com/spring-cloud/spring-cloud-commons/blob/main/spring-cloud-loadbalancer/src/test/java/org/springframework/cloud/loadbalancer/blocking/client/BlockingLoadBalancerClientTests.java">BlockingLoadBalancerClientTests</a>
  * @author Olga Maciaszek-Sharma
  */
 @ExtendWith(MockitoExtension.class)

spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/loadbalancer/FeignLoadBalancerAutoConfigurationTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -19,6 +19,7 @@ package org.springframework.cloud.openfeign.loadbalancer;
 import java.util.Map;
 
 import feign.Client;
+import feign.hc5.ApacheHttp5Client;
 import feign.httpclient.ApacheHttpClient;
 import feign.okhttp.OkHttpClient;
 import org.junit.jupiter.api.Test;
@@ -38,6 +39,7 @@ import static org.assertj.core.api.Assertions.assertThat;
 
 /**
  * @author Olga Maciaszek-Sharma
+ * @author Nguyen Ky Thanh
  */
 class FeignLoadBalancerAutoConfigurationTests {
 
@@ -45,7 +47,8 @@ class FeignLoadBalancerAutoConfigurationTests {
 	void shouldInstantiateDefaultFeignBlockingLoadBalancerClientWhenHttpClientDisabled() {
 		ConfigurableApplicationContext context = initContext(
 				"spring.cloud.loadbalancer.ribbon.enabled=false",
-				"feign.httpclient.enabled=false");
+				"feign.httpclient.enabled=false",
+				"spring.cloud.loadbalancer.retry.enabled=false");
 		assertThatOneBeanPresent(context, BlockingLoadBalancerClient.class);
 		assertLoadBalanced(context, Client.Default.class);
 		assertThatBeanNotPresent(context, LoadBalancerFeignClient.class);
@@ -54,7 +57,8 @@ class FeignLoadBalancerAutoConfigurationTests {
 	@Test
 	void shouldInstantiateHttpFeignClientWhenEnabled() {
 		ConfigurableApplicationContext context = initContext(
-				"spring.cloud.loadbalancer.ribbon.enabled=false");
+				"spring.cloud.loadbalancer.ribbon.enabled=false",
+				"spring.cloud.loadbalancer.retry.enabled=false");
 		assertThatOneBeanPresent(context, BlockingLoadBalancerClient.class);
 		assertLoadBalanced(context, ApacheHttpClient.class);
 		assertThatBeanNotPresent(context, LoadBalancerFeignClient.class);
@@ -64,16 +68,93 @@ class FeignLoadBalancerAutoConfigurationTests {
 	void shouldInstantiateOkHttpFeignClientWhenEnabled() {
 		ConfigurableApplicationContext context = initContext(
 				"spring.cloud.loadbalancer.ribbon.enabled=false",
-				"feign.httpclient.enabled=false", "feign.okhttp.enabled=true");
+				"feign.httpclient.enabled=false", "feign.okhttp.enabled=true",
+				"spring.cloud.loadbalancer.retry.enabled=false");
 		assertThatOneBeanPresent(context, BlockingLoadBalancerClient.class);
 		assertLoadBalanced(context, OkHttpClient.class);
 		assertThatBeanNotPresent(context, LoadBalancerFeignClient.class);
 	}
 
+	@Test
+	void shouldInstantiateHttpFeignClient5WhenEnabled() {
+		ConfigurableApplicationContext context = initContext(
+				"spring.cloud.loadbalancer.ribbon.enabled=false",
+				"feign.httpclient.enabled=false", "feign.okhttp.enabled=false",
+				"feign.httpclient.hc5.enabled=true",
+				"spring.cloud.loadbalancer.retry.enabled=false");
+		assertThatOneBeanPresent(context, BlockingLoadBalancerClient.class);
+		assertLoadBalanced(context, ApacheHttp5Client.class);
+		assertThatBeanNotPresent(context, LoadBalancerFeignClient.class);
+	}
+
+	@Test
+	void shouldInstantiateHttpFeignClient5WhenBothHttpClientAndHttpClient5Enabled() {
+		ConfigurableApplicationContext context = initContext(
+				"spring.cloud.loadbalancer.ribbon.enabled=false",
+				"feign.httpclient.enabled=true", "feign.okhttp.enabled=false",
+				"feign.httpclient.hc5.enabled=true",
+				"spring.cloud.loadbalancer.retry.enabled=false");
+		assertThatOneBeanPresent(context, BlockingLoadBalancerClient.class);
+		assertLoadBalanced(context, ApacheHttp5Client.class);
+		assertThatBeanNotPresent(context, LoadBalancerFeignClient.class);
+	}
+
+	@Test
+	void shouldInstantiateRetryableDefaultFeignBlockingLoadBalancerClientWhenHttpClientDisabled() {
+		ConfigurableApplicationContext context = initContext(
+				"spring.cloud.loadbalancer.ribbon.enabled=false",
+				"feign.httpclient.enabled=false");
+		assertThatOneBeanPresent(context, BlockingLoadBalancerClient.class);
+		assertLoadBalancedWithRetries(context, Client.Default.class);
+		assertThatBeanNotPresent(context, LoadBalancerFeignClient.class);
+	}
+
+	@Test
+	void shouldInstantiateRetryableHttpFeignClientWhenEnabled() {
+		ConfigurableApplicationContext context = initContext(
+				"spring.cloud.loadbalancer.ribbon.enabled=false");
+		assertThatOneBeanPresent(context, BlockingLoadBalancerClient.class);
+		assertLoadBalancedWithRetries(context, ApacheHttpClient.class);
+		assertThatBeanNotPresent(context, LoadBalancerFeignClient.class);
+	}
+
+	@Test
+	void shouldInstantiateRetryableOkHttpFeignClientWhenEnabled() {
+		ConfigurableApplicationContext context = initContext(
+				"spring.cloud.loadbalancer.ribbon.enabled=false",
+				"feign.httpclient.enabled=false", "feign.okhttp.enabled=true");
+		assertThatOneBeanPresent(context, BlockingLoadBalancerClient.class);
+		assertLoadBalancedWithRetries(context, OkHttpClient.class);
+		assertThatBeanNotPresent(context, LoadBalancerFeignClient.class);
+	}
+
+	@Test
+	void shouldInstantiateRetryableHttpFeignClient5WhenEnabled() {
+		ConfigurableApplicationContext context = initContext(
+				"spring.cloud.loadbalancer.ribbon.enabled=false",
+				"feign.httpclient.enabled=false", "feign.okhttp.enabled=false",
+				"feign.httpclient.hc5.enabled=true");
+		assertThatOneBeanPresent(context, BlockingLoadBalancerClient.class);
+		assertLoadBalancedWithRetries(context, ApacheHttp5Client.class);
+		assertThatBeanNotPresent(context, LoadBalancerFeignClient.class);
+	}
+
+	@Test
+	void shouldInstantiateRetryableHttpFeignClient5WhenBothHttpClientAndHttpClient5Enabled() {
+		ConfigurableApplicationContext context = initContext(
+				"spring.cloud.loadbalancer.ribbon.enabled=false",
+				"feign.httpclient.enabled=true", "feign.okhttp.enabled=false",
+				"feign.httpclient.hc5.enabled=true");
+		assertThatOneBeanPresent(context, BlockingLoadBalancerClient.class);
+		assertLoadBalancedWithRetries(context, ApacheHttp5Client.class);
+		assertThatBeanNotPresent(context, LoadBalancerFeignClient.class);
+	}
+
 	@Test
 	void shouldNotProcessLoadBalancerConfigurationWhenRibbonEnabled() {
 		ConfigurableApplicationContext context = initContext(
-				"spring.cloud.loadbalancer.ribbon.enabled=true");
+				"spring.cloud.loadbalancer.ribbon.enabled=true",
+				"spring.cloud.loadbalancer.retry.enabled=false");
 		assertThatOneBeanPresent(context, LoadBalancerFeignClient.class);
 		assertThatBeanNotPresent(context, BlockingLoadBalancerClient.class);
 		assertThatBeanNotPresent(context, FeignBlockingLoadBalancerClient.class);
@@ -104,6 +185,18 @@ class FeignLoadBalancerAutoConfigurationTests {
 		assertThat(beans.get("feignClient").getDelegate()).isInstanceOf(delegateClass);
 	}
 
+	private void assertLoadBalancedWithRetries(ConfigurableApplicationContext context,
+			Class delegateClass) {
+		Map<String, RetryableFeignBlockingLoadBalancerClient> retryableBeans = context
+				.getBeansOfType(RetryableFeignBlockingLoadBalancerClient.class);
+		assertThat(retryableBeans).hasSize(1);
+		Map<String, FeignBlockingLoadBalancerClient> beans = context
+				.getBeansOfType(FeignBlockingLoadBalancerClient.class);
+		assertThat(beans).isEmpty();
+		assertThat(retryableBeans.get("feignRetryClient").getDelegate())
+				.isInstanceOf(delegateClass);
+	}
+
 	private void assertThatBeanNotPresent(ConfigurableApplicationContext context,
 			Class<?> beanClass) {
 		Map<String, ?> beans = context.getBeansOfType(beanClass);

spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/loadbalancer/RetryableFeignBlockingLoadBalancerClientTests.java

@@ -0,0 +1,231 @@
+/*
+ * Copyright 2013-2020 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.cloud.openfeign.loadbalancer;
+
+import java.io.BufferedInputStream;
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URI;
+import java.nio.charset.StandardCharsets;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+
+import feign.Client;
+import feign.Request;
+import feign.Response;
+import org.apache.commons.io.IOUtils;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.ArgumentCaptor;
+import org.mockito.junit.jupiter.MockitoExtension;
+
+import org.springframework.cloud.client.DefaultServiceInstance;
+import org.springframework.cloud.client.ServiceInstance;
+import org.springframework.cloud.client.loadbalancer.LoadBalancedRetryFactory;
+import org.springframework.cloud.client.loadbalancer.LoadBalancerRetryProperties;
+import org.springframework.cloud.loadbalancer.blocking.client.BlockingLoadBalancerClient;
+import org.springframework.cloud.loadbalancer.blocking.retry.BlockingLoadBalancedRetryPolicy;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.MediaType;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.argThat;
+import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+/**
+ * Tests for {@link RetryableFeignBlockingLoadBalancerClient}. Note: the underlying
+ * {@link BlockingLoadBalancerClient} is already extensively tested in the Spring Cloud
+ * Commons project, so here we are only testing the interactions between
+ * {@link RetryableFeignBlockingLoadBalancerClient} and its delegates.
+ *
+ * @see <a href=
+ * "https://github.com/spring-cloud/spring-cloud-commons/blob/main/spring-cloud-loadbalancer/src/test/java/org/springframework/cloud/loadbalancer/blocking/client/BlockingLoadBalancerClientTests.java">BlockingLoadBalancerClientTests</a>
+ * @author Olga Maciaszek-Sharma
+ */
+@ExtendWith(MockitoExtension.class)
+class RetryableFeignBlockingLoadBalancerClientTests {
+
+	private Client delegate = mock(Client.class);
+
+	private LoadBalancedRetryFactory retryFactory = mock(LoadBalancedRetryFactory.class);
+
+	private BlockingLoadBalancerClient loadBalancerClient = mock(
+			BlockingLoadBalancerClient.class);
+
+	private LoadBalancerRetryProperties properties = new LoadBalancerRetryProperties();
+
+	private RetryableFeignBlockingLoadBalancerClient feignBlockingLoadBalancerClient = new RetryableFeignBlockingLoadBalancerClient(
+			delegate, loadBalancerClient, retryFactory);
+
+	private ServiceInstance serviceInstance = new DefaultServiceInstance("test-a", "test",
+			"testhost", 80, false);
+
+	@BeforeEach
+	void setUp() {
+		when(retryFactory.createRetryPolicy(any(), eq(loadBalancerClient)))
+				.thenReturn(new BlockingLoadBalancedRetryPolicy("test",
+						loadBalancerClient, properties));
+		when(loadBalancerClient.choose("test")).thenReturn(serviceInstance);
+	}
+
+	@Test
+	void shouldExtractServiceIdFromRequestUrl() throws IOException {
+		Request request = testRequest();
+		Response response = testResponse(200);
+		when(delegate.execute(any(), any())).thenReturn(response);
+		when(retryFactory.createRetryPolicy(any(), eq(loadBalancerClient)))
+				.thenReturn(new BlockingLoadBalancedRetryPolicy("test",
+						loadBalancerClient, properties));
+		when(loadBalancerClient.reconstructURI(serviceInstance,
+				URI.create("http://test/path")))
+						.thenReturn(URI.create("http://testhost:80/path"));
+
+		feignBlockingLoadBalancerClient.execute(request, new Request.Options());
+
+		verify(loadBalancerClient).choose("test");
+		verify(loadBalancerClient).reconstructURI(serviceInstance,
+				URI.create("http://test/path"));
+
+		verify(delegate).execute(argThat((Request actualRequest) -> actualRequest.url()
+				.equals("http://testhost:80/path")), any());
+	}
+
+	private Response testResponse(int status) {
+		return Response.builder().request(testRequest()).status(status).build();
+	}
+
+	private Response testResponse(int status, String body) {
+		// ByteArrayInputStream ignores close() and must be wrapped
+		InputStream reallyCloseable = new BufferedInputStream(
+				new ByteArrayInputStream(body.getBytes(StandardCharsets.UTF_8)));
+		return Response.builder().request(testRequest()).status(status)
+				.body(reallyCloseable, null).build();
+
+	}
+
+	@Test
+	void shouldExecuteOriginalRequestIfInstanceNotFound() throws IOException {
+		Request request = testRequest();
+		Response response = testResponse(503);
+		when(loadBalancerClient.choose("test")).thenReturn(null);
+		when(delegate.execute(any(), any())).thenReturn(response);
+		when(retryFactory.createRetryPolicy(any(), eq(loadBalancerClient)))
+				.thenReturn(new BlockingLoadBalancedRetryPolicy("test",
+						loadBalancerClient, properties));
+
+		feignBlockingLoadBalancerClient.execute(request, new Request.Options());
+
+		verify(delegate).execute(eq(request), any());
+	}
+
+	@Test
+	void shouldRetryOnRepeatableStatusCode() throws IOException {
+		properties.getRetryableStatusCodes().add(503);
+		Request request = testRequest();
+		Response response = testResponse(503);
+		when(delegate.execute(any(), any())).thenReturn(response);
+		when(retryFactory.createRetryPolicy(any(), eq(loadBalancerClient)))
+				.thenReturn(new BlockingLoadBalancedRetryPolicy("test",
+						loadBalancerClient, properties));
+		when(loadBalancerClient.reconstructURI(serviceInstance,
+				URI.create("http://test/path")))
+						.thenReturn(URI.create("http://testhost:80/path"));
+
+		feignBlockingLoadBalancerClient.execute(request, new Request.Options());
+
+		verify(loadBalancerClient, times(2)).reconstructURI(serviceInstance,
+				URI.create("http://test/path"));
+		verify(delegate, times(2)).execute(any(), any());
+	}
+
+	@Test
+	void shouldExposeResponseBodyOnRetry() throws IOException {
+		properties.getRetryableStatusCodes().add(503);
+		Request request = testRequest();
+		when(delegate.execute(any(), any())).thenReturn(testResponse(503, "foo"),
+				testResponse(503, "foo"));
+		when(retryFactory.createRetryPolicy(any(), eq(loadBalancerClient)))
+				.thenReturn(new BlockingLoadBalancedRetryPolicy("test",
+						loadBalancerClient, properties));
+		when(loadBalancerClient.reconstructURI(serviceInstance,
+				URI.create("http://test/path")))
+						.thenReturn(URI.create("http://testhost:80/path"));
+
+		Response response = feignBlockingLoadBalancerClient.execute(request,
+				new Request.Options());
+
+		String bodyContent = IOUtils
+				.toString(response.body().asReader(StandardCharsets.UTF_8));
+		assertThat(bodyContent).isEqualTo("foo");
+	}
+
+	@Test
+	void shouldPassCorrectRequestToDelegate() throws IOException {
+		Request request = testRequest();
+		Request.Options options = new Request.Options();
+		String url = "http://127.0.0.1/path";
+		ServiceInstance serviceInstance = new DefaultServiceInstance("test-1", "test",
+				"test-host", 8888, false);
+		when(loadBalancerClient.choose("test")).thenReturn(serviceInstance);
+		when(loadBalancerClient.reconstructURI(serviceInstance,
+				URI.create("http://test/path"))).thenReturn(URI.create(url));
+		Response response = testResponse(200);
+		when(delegate.execute(any(), any())).thenReturn(response);
+		when(retryFactory.createRetryPolicy(any(), eq(loadBalancerClient)))
+				.thenReturn(new BlockingLoadBalancedRetryPolicy("test",
+						loadBalancerClient, properties));
+
+		feignBlockingLoadBalancerClient.execute(request, options);
+
+		ArgumentCaptor<Request> captor = ArgumentCaptor.forClass(Request.class);
+		verify(delegate, times(1)).execute(captor.capture(), eq(options));
+		Request actualRequest = captor.getValue();
+		assertThat(actualRequest.httpMethod()).isEqualTo(Request.HttpMethod.GET);
+		assertThat(actualRequest.url()).isEqualTo(url);
+		assertThat(actualRequest.headers()).hasSize(1);
+		assertThat(actualRequest.headers()).containsEntry(HttpHeaders.CONTENT_TYPE,
+				Collections.singletonList(MediaType.APPLICATION_JSON_VALUE));
+		assertThat(new String(actualRequest.body())).isEqualTo("hello");
+	}
+
+	private Request testRequest() {
+		return testRequest("test");
+	}
+
+	private Request testRequest(String host) {
+		return Request.create(Request.HttpMethod.GET, "http://" + host + "/path",
+				testHeaders(), "hello".getBytes(), StandardCharsets.UTF_8, null);
+	}
+
+	private Map<String, Collection<String>> testHeaders() {
+		Map<String, Collection<String>> feignHeaders = new HashMap<>();
+		feignHeaders.put(HttpHeaders.CONTENT_TYPE,
+				Collections.singletonList(MediaType.APPLICATION_JSON_VALUE));
+		return feignHeaders;
+
+	}
+
+}

spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/ribbon/FeignLoadBalancerTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -44,6 +44,7 @@ import org.springframework.cloud.openfeign.ribbon.FeignLoadBalancer.RibbonReques
 import org.springframework.cloud.openfeign.ribbon.FeignLoadBalancer.RibbonResponse;
 
 import static com.netflix.client.config.CommonClientConfigKey.ConnectTimeout;
+import static com.netflix.client.config.CommonClientConfigKey.FollowRedirects;
 import static com.netflix.client.config.CommonClientConfigKey.IsSecure;
 import static com.netflix.client.config.CommonClientConfigKey.MaxAutoRetries;
 import static com.netflix.client.config.CommonClientConfigKey.MaxAutoRetriesNextServer;
@@ -71,53 +72,47 @@ public class FeignLoadBalancerTests {
 
 	private FeignLoadBalancer feignLoadBalancer;
 
-	private ServerIntrospector inspector = new DefaultServerIntrospector();
+	private final ServerIntrospector inspector = new DefaultServerIntrospector();
-
-	private Integer defaultConnectTimeout = 10000;
-
-	private Integer defaultReadTimeout = 10000;
 
 	@Before
 	public void setup() {
 		MockitoAnnotations.initMocks(this);
-		when(this.config.get(MaxAutoRetries, DEFAULT_MAX_AUTO_RETRIES)).thenReturn(1);
+		when(config.get(MaxAutoRetries, DEFAULT_MAX_AUTO_RETRIES)).thenReturn(1);
-		when(this.config.get(MaxAutoRetriesNextServer,
+		when(config.get(MaxAutoRetriesNextServer, DEFAULT_MAX_AUTO_RETRIES_NEXT_SERVER))
-				DEFAULT_MAX_AUTO_RETRIES_NEXT_SERVER)).thenReturn(1);
+				.thenReturn(1);
-		when(this.config.get(OkToRetryOnAllOperations, eq(anyBoolean())))
+		when(config.get(OkToRetryOnAllOperations, eq(anyBoolean()))).thenReturn(true);
-				.thenReturn(true);
+		when(config.get(ConnectTimeout)).thenReturn(10000);
-		when(this.config.get(ConnectTimeout)).thenReturn(this.defaultConnectTimeout);
+		when(config.get(ReadTimeout)).thenReturn(10000);
-		when(this.config.get(ReadTimeout)).thenReturn(this.defaultReadTimeout);
+		when(config.get(eq(FollowRedirects), any())).thenReturn(true);
-		when(this.config.get(OkToRetryOnAllOperations, false)).thenReturn(true);
+		when(config.get(OkToRetryOnAllOperations, false)).thenReturn(true);
 	}
 
 	@Test
 	public void testUriInsecure() throws Exception {
-		when(this.config.get(IsSecure)).thenReturn(false);
+		when(config.get(IsSecure)).thenReturn(false);
 
-		this.feignLoadBalancer = new FeignLoadBalancer(this.lb, this.config,
+		feignLoadBalancer = new FeignLoadBalancer(lb, config, inspector);
-				this.inspector);
 		Request request = new RequestTemplate().method(GET).target("https://foo/")
 				.resolve(new HashMap<>()).request();
-		RibbonRequest ribbonRequest = new RibbonRequest(this.delegate, request,
+		RibbonRequest ribbonRequest = new RibbonRequest(delegate, request,
 				new URI(request.url()));
 
 		Response response = Response.builder().request(request).status(200).reason("Test")
 				.headers(Collections.emptyMap()).body(new byte[0]).build();
-		when(this.delegate.execute(any(Request.class), any(Options.class)))
+		when(delegate.execute(any(Request.class), any(Options.class)))
 				.thenReturn(response);
 
-		RibbonResponse resp = this.feignLoadBalancer.execute(ribbonRequest, null);
+		RibbonResponse resp = feignLoadBalancer.execute(ribbonRequest, null);
 
 		assertThat(resp.getRequestedURI()).isEqualTo(new URI("https://foo"));
 	}
 
 	@Test
 	public void testSecureUriFromClientConfig() throws Exception {
-		when(this.config.get(IsSecure)).thenReturn(true);
+		when(config.get(IsSecure)).thenReturn(true);
-		this.feignLoadBalancer = new FeignLoadBalancer(this.lb, this.config,
+		feignLoadBalancer = new FeignLoadBalancer(lb, config, inspector);
-				this.inspector);
 		Server server = new Server("foo", 7777);
-		URI uri = this.feignLoadBalancer.reconstructURIWithServer(server,
+		URI uri = feignLoadBalancer.reconstructURIWithServer(server,
 				new URI("https://foo/"));
 		assertThat(uri).isEqualTo(new URI("https://foo:7777/"));
 	}
@@ -125,33 +120,31 @@ public class FeignLoadBalancerTests {
 	@Test
 	public void testInsecureUriFromInsecureClientConfigToSecureServerIntrospector()
 			throws Exception {
-		when(this.config.get(IsSecure)).thenReturn(false);
+		when(config.get(IsSecure)).thenReturn(false);
-		this.feignLoadBalancer = new FeignLoadBalancer(this.lb, this.config,
+		feignLoadBalancer = new FeignLoadBalancer(lb, config, new ServerIntrospector() {
-				new ServerIntrospector() {
+			@Override
-					@Override
+			public boolean isSecure(Server server) {
-					public boolean isSecure(Server server) {
+				return true;
-						return true;
+			}
-					}
 
-					@Override
+			@Override
-					public Map<String, String> getMetadata(Server server) {
+			public Map<String, String> getMetadata(Server server) {
-						return null;
+				return null;
-					}
+			}
-				});
+		});
 		Server server = new Server("foo", 7777);
-		URI uri = this.feignLoadBalancer.reconstructURIWithServer(server,
+		URI uri = feignLoadBalancer.reconstructURIWithServer(server,
 				new URI("https://foo/"));
 		assertThat(uri).isEqualTo(new URI("https://foo:7777/"));
 	}
 
 	@Test
 	public void testSecureUriFromClientConfigOverride() throws Exception {
-		this.feignLoadBalancer = new FeignLoadBalancer(this.lb, this.config,
+		feignLoadBalancer = new FeignLoadBalancer(lb, config, inspector);
-				this.inspector);
 		Server server = Mockito.mock(Server.class);
 		when(server.getPort()).thenReturn(443);
 		when(server.getHost()).thenReturn("foo");
-		URI uri = this.feignLoadBalancer.reconstructURIWithServer(server,
+		URI uri = feignLoadBalancer.reconstructURIWithServer(server,
 				new URI("https://bar/"));
 		assertThat(uri).isEqualTo(new URI("https://foo:443/"));
 	}
@@ -163,7 +156,7 @@ public class FeignLoadBalancerTests {
 
 		assertThat(request.url()).isEqualTo(url);
 
-		RibbonRequest ribbonRequest = new RibbonRequest(this.delegate, request,
+		RibbonRequest ribbonRequest = new RibbonRequest(delegate, request,
 				new URI(request.url()));
 
 		Request cloneRequest = ribbonRequest.toRequest();
@@ -174,7 +167,7 @@ public class FeignLoadBalancerTests {
 
 	@Test
 	public void testOverrideFeignLoadBalancer() throws Exception {
-		when(this.config.get(IsSecure)).thenReturn(false);
+		when(config.get(IsSecure)).thenReturn(false);
 		Server server1 = new Server("foo", 6666);
 		Server server2 = new Server("foo", 7777);
 		BaseLoadBalancer baseLoadBalancer = new BaseLoadBalancer();
@@ -185,8 +178,7 @@ public class FeignLoadBalancerTests {
 			}
 		});
 
-		this.feignLoadBalancer = new FeignLoadBalancer(baseLoadBalancer, this.config,
+		feignLoadBalancer = new FeignLoadBalancer(baseLoadBalancer, config, inspector) {
-				this.inspector) {
 			protected void customizeLoadBalancerCommandBuilder(
 					final FeignLoadBalancer.RibbonRequest request,
 					final IClientConfig config,
@@ -196,13 +188,13 @@ public class FeignLoadBalancerTests {
 		};
 		Request request = new RequestTemplate().method(GET).resolve(new HashMap<>())
 				.request();
-		RibbonResponse resp = this.feignLoadBalancer.executeWithLoadBalancer(
+		RibbonResponse resp = feignLoadBalancer.executeWithLoadBalancer(
-				new RibbonRequest(this.delegate, request, new URI(request.url())), null);
+				new RibbonRequest(delegate, request, new URI(request.url())), null);
 		assertThat(resp.getRequestedURI().getPort()).isEqualTo(7777);
 		request = new RequestTemplate().method(GET).header("c_ip", "666")
 				.resolve(new HashMap<>()).request();
-		resp = this.feignLoadBalancer.executeWithLoadBalancer(
+		resp = feignLoadBalancer.executeWithLoadBalancer(
-				new RibbonRequest(this.delegate, request, new URI(request.url())), null);
+				new RibbonRequest(delegate, request, new URI(request.url())), null);
 		assertThat(resp.getRequestedURI().getPort()).isEqualTo(6666);
 	}
 

spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/ribbon/FeignRibbonClientPathTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -50,9 +50,8 @@ import static org.springframework.boot.test.context.SpringBootTest.WebEnvironmen
 		webEnvironment = RANDOM_PORT,
 		value = { "spring.application.name=feignribbonclientpathtest",
 				"feign.okhttp.enabled=false", "feign.httpclient.enabled=false",
-				"feign.hystrix.enabled=false", "test.path.prefix=/base/path" // For
+				"feign.hystrix.enabled=false", "feign.httpclient.hc5.enabled=false",
-																				// pathWithPlaceholder
+				"test.path.prefix=/base/path" // For pathWithPlaceholder test
-																				// test
 		})
 @DirtiesContext
 public class FeignRibbonClientPathTests {

spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/ribbon/FeignRibbonClientRetryTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -56,7 +56,8 @@ import static org.springframework.boot.test.context.SpringBootTest.WebEnvironmen
 		webEnvironment = RANDOM_PORT,
 		value = { "spring.application.name=feignclientretrytest",
 				"feign.okhttp.enabled=false", "feign.httpclient.enabled=false",
-				"feign.hystrix.enabled=false", "localapp.ribbon.MaxAutoRetries=2",
+				"feign.hystrix.enabled=false", "feign.httpclient.hc5.enabled=false",
+				"localapp.ribbon.MaxAutoRetries=2",
 				"localapp.ribbon.MaxAutoRetriesNextServer=3" })
 @DirtiesContext
 public class FeignRibbonClientRetryTests {

spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/ribbon/FeignRibbonHttpClient5ConfigurationTests.java

@@ -0,0 +1,112 @@
+/*
+ * Copyright 2013-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.cloud.openfeign.ribbon;
+
+import java.lang.reflect.Field;
+
+import javax.net.ssl.SSLContextSpi;
+import javax.net.ssl.SSLSocketFactory;
+import javax.net.ssl.X509TrustManager;
+
+import feign.Client;
+import feign.hc5.ApacheHttp5Client;
+import org.apache.hc.client5.http.impl.io.DefaultHttpClientConnectionOperator;
+import org.apache.hc.client5.http.io.HttpClientConnectionManager;
+import org.apache.hc.client5.http.socket.ConnectionSocketFactory;
+import org.apache.hc.core5.http.URIScheme;
+import org.apache.hc.core5.http.config.Lookup;
+import org.junit.jupiter.api.Test;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.boot.builder.SpringApplicationBuilder;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.test.annotation.DirtiesContext;
+import org.springframework.util.ReflectionUtils;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * @author Nguyen Ky Thanh
+ */
+@SpringBootTest(
+		classes = FeignRibbonHttpClient5ConfigurationTests.FeignRibbonHttpClientConfigurationTestsApplication.class,
+		webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT,
+		properties = { "feign.httpclient.disableSslValidation=true",
+				"feign.httpclient.hc5.enabled=true", "feign.httpclient.enabled=false" })
+@DirtiesContext
+class FeignRibbonHttpClient5ConfigurationTests {
+
+	@Autowired
+	private HttpClientConnectionManager connectionManager;
+
+	@Autowired
+	private Client client;
+
+	@Test
+	void disableSslTest() throws Exception {
+		Lookup<ConnectionSocketFactory> socketFactoryRegistry = getConnectionSocketFactoryLookup(
+				connectionManager);
+		assertThat(socketFactoryRegistry.lookup(URIScheme.HTTPS.id)).isNotNull();
+		assertThat(getX509TrustManager(socketFactoryRegistry).getAcceptedIssuers())
+				.isNull();
+	}
+
+	@Test
+	void verifyHttpClient5IsPickedUp() {
+		assertThat(client).isInstanceOf(LoadBalancerFeignClient.class);
+		Client delegate = (Client) getField(client, "delegate");
+		assertThat(delegate).isInstanceOf(ApacheHttp5Client.class);
+	}
+
+	private Lookup<ConnectionSocketFactory> getConnectionSocketFactoryLookup(
+			HttpClientConnectionManager connectionManager) {
+		DefaultHttpClientConnectionOperator connectionOperator = (DefaultHttpClientConnectionOperator) this
+				.getField(connectionManager, "connectionOperator");
+		return (Lookup) getField(connectionOperator, "socketFactoryRegistry");
+	}
+
+	private X509TrustManager getX509TrustManager(
+			Lookup<ConnectionSocketFactory> socketFactoryRegistry) {
+		ConnectionSocketFactory connectionSocketFactory = (ConnectionSocketFactory) socketFactoryRegistry
+				.lookup(URIScheme.HTTPS.id);
+		SSLSocketFactory sslSocketFactory = (SSLSocketFactory) this
+				.getField(connectionSocketFactory, "socketFactory");
+		SSLContextSpi sslContext = (SSLContextSpi) getField(sslSocketFactory, "context");
+		return (X509TrustManager) getField(sslContext, "trustManager");
+	}
+
+	protected <T> Object getField(Object target, String name) {
+		Field field = ReflectionUtils.findField(target.getClass(), name);
+		ReflectionUtils.makeAccessible(field);
+		Object value = ReflectionUtils.getField(field, target);
+		return value;
+	}
+
+	@Configuration(proxyBeanMethods = false)
+	@EnableAutoConfiguration
+	static class FeignRibbonHttpClientConfigurationTestsApplication {
+
+		public static void main(String[] args) {
+			new SpringApplicationBuilder(FeignRibbonClientRetryTests.Application.class)
+					.run(args);
+		}
+
+	}
+
+}

spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/ribbon/RetryableFeignLoadBalancerTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -59,6 +59,7 @@ import org.springframework.retry.backoff.BackOffInterruptedException;
 import org.springframework.retry.backoff.BackOffPolicy;
 
 import static com.netflix.client.config.CommonClientConfigKey.ConnectTimeout;
+import static com.netflix.client.config.CommonClientConfigKey.FollowRedirects;
 import static com.netflix.client.config.CommonClientConfigKey.MaxAutoRetries;
 import static com.netflix.client.config.CommonClientConfigKey.MaxAutoRetriesNextServer;
 import static com.netflix.client.config.CommonClientConfigKey.OkToRetryOnAllOperations;
@@ -92,29 +93,28 @@ public class RetryableFeignLoadBalancerTests {
 	@Mock
 	private IClientConfig config;
 
-	private ServerIntrospector inspector = new DefaultServerIntrospector();
+	private final ServerIntrospector inspector = new DefaultServerIntrospector();
 
-	private Integer defaultConnectTimeout = 10000;
+	private final Integer defaultConnectTimeout = 10000;
 
-	private Integer defaultReadTimeout = 10000;
+	private final Integer defaultReadTimeout = 10000;
 
 	@Before
 	public void setup() {
 		MockitoAnnotations.initMocks(this);
-		when(this.config.get(MaxAutoRetries, DEFAULT_MAX_AUTO_RETRIES)).thenReturn(1);
+		when(config.get(MaxAutoRetries, DEFAULT_MAX_AUTO_RETRIES)).thenReturn(1);
-		when(this.config.get(MaxAutoRetriesNextServer,
+		when(config.get(MaxAutoRetriesNextServer, DEFAULT_MAX_AUTO_RETRIES_NEXT_SERVER))
-				DEFAULT_MAX_AUTO_RETRIES_NEXT_SERVER)).thenReturn(1);
+				.thenReturn(1);
-		when(this.config.get(OkToRetryOnAllOperations, eq(anyBoolean())))
+		when(config.get(OkToRetryOnAllOperations, eq(anyBoolean()))).thenReturn(true);
-				.thenReturn(true);
+		when(config.get(ConnectTimeout)).thenReturn(defaultConnectTimeout);
-		when(this.config.get(ConnectTimeout)).thenReturn(this.defaultConnectTimeout);
+		when(config.get(ReadTimeout)).thenReturn(defaultReadTimeout);
-		when(this.config.get(ReadTimeout)).thenReturn(this.defaultReadTimeout);
+		when(config.get(OkToRetryOnAllOperations, false)).thenReturn(true);
-		when(this.config.get(OkToRetryOnAllOperations, false)).thenReturn(true);
+		when(config.get(eq(FollowRedirects), any())).thenReturn(true);
 	}
 
 	@Test
 	public void executeNoFailure() throws Exception {
-		RibbonLoadBalancerContext lbContext = new RibbonLoadBalancerContext(this.lb,
+		RibbonLoadBalancerContext lbContext = new RibbonLoadBalancerContext(lb, config);
-				this.config);
 		SpringClientFactory clientFactory = mock(SpringClientFactory.class);
 		doReturn(lbContext).when(clientFactory).getLoadBalancerContext(any(String.class));
 		IClientConfig config = mock(IClientConfig.class);
@@ -123,9 +123,9 @@ public class RetryableFeignLoadBalancerTests {
 				anyInt());
 		doReturn(true).when(config)
 				.get(eq(CommonClientConfigKey.OkToRetryOnAllOperations), eq(false));
-		doReturn(this.defaultConnectTimeout).when(config)
+		doReturn(defaultConnectTimeout).when(config)
 				.get(eq(CommonClientConfigKey.ConnectTimeout));
-		doReturn(this.defaultReadTimeout).when(config)
+		doReturn(defaultReadTimeout).when(config)
 				.get(eq(CommonClientConfigKey.ReadTimeout));
 		doReturn("404,502,foo, ,").when(config).getPropertyAsString(
 				eq(RibbonLoadBalancedRetryPolicy.RETRYABLE_STATUS_CODES), eq(""));
@@ -141,8 +141,9 @@ public class RetryableFeignLoadBalancerTests {
 				.headers(new HashMap<>()).build();
 		doReturn(response).when(client).execute(any(Request.class),
 				any(Request.Options.class));
-		RetryableFeignLoadBalancer feignLb = new RetryableFeignLoadBalancer(this.lb,
+		when(config.get(eq(FollowRedirects), any())).thenReturn(true);
-				config, this.inspector, loadBalancedRetryFactory);
+		RetryableFeignLoadBalancer feignLb = new RetryableFeignLoadBalancer(lb, config,
+				inspector, loadBalancedRetryFactory);
 		FeignLoadBalancer.RibbonResponse ribbonResponse = feignLb.execute(request, null);
 		assertThat(ribbonResponse.toResponse().status()).isEqualTo(200);
 		verify(client, times(1)).execute(any(Request.class), any(Request.Options.class));
@@ -157,8 +158,8 @@ public class RetryableFeignLoadBalancerTests {
 				client, feignRequest, new URI("https://foo"));
 		doThrow(new IOException("boom")).when(client).execute(any(Request.class),
 				any(Request.Options.class));
-		RetryableFeignLoadBalancer feignLb = new RetryableFeignLoadBalancer(this.lb,
+		RetryableFeignLoadBalancer feignLb = new RetryableFeignLoadBalancer(lb, config,
-				this.config, this.inspector, new LoadBalancedRetryFactory() {
+				inspector, new LoadBalancedRetryFactory() {
 					@Override
 					public LoadBalancedRetryPolicy createRetryPolicy(String s,
 							ServiceInstanceChooser serviceInstanceChooser) {
@@ -189,8 +190,7 @@ public class RetryableFeignLoadBalancerTests {
 
 	@Test
 	public void executeRetry() throws Exception {
-		RibbonLoadBalancerContext lbContext = new RibbonLoadBalancerContext(this.lb,
+		RibbonLoadBalancerContext lbContext = new RibbonLoadBalancerContext(lb, config);
-				this.config);
 		SpringClientFactory clientFactory = mock(SpringClientFactory.class);
 		IClientConfig config = mock(IClientConfig.class);
 		doReturn(1).when(config).get(eq(CommonClientConfigKey.MaxAutoRetries), anyInt());
@@ -198,14 +198,15 @@ public class RetryableFeignLoadBalancerTests {
 				anyInt());
 		doReturn(true).when(config)
 				.get(eq(CommonClientConfigKey.OkToRetryOnAllOperations), eq(false));
-		doReturn(this.defaultConnectTimeout).when(config)
+		doReturn(defaultConnectTimeout).when(config)
 				.get(eq(CommonClientConfigKey.ConnectTimeout));
-		doReturn(this.defaultReadTimeout).when(config)
+		doReturn(defaultReadTimeout).when(config)
 				.get(eq(CommonClientConfigKey.ReadTimeout));
 		doReturn("").when(config).getPropertyAsString(
 				eq(RibbonLoadBalancedRetryPolicy.RETRYABLE_STATUS_CODES), eq(""));
 		doReturn(config).when(clientFactory).getClientConfig(eq("default"));
 		doReturn(lbContext).when(clientFactory).getLoadBalancerContext(any(String.class));
+		when(config.get(eq(FollowRedirects), any())).thenReturn(true);
 		MyBackOffPolicy backOffPolicy = new MyBackOffPolicy();
 		RibbonLoadBalancedRetryFactory loadBalancedRetryFactory = new RibbonLoadBalancedRetryFactory(
 				clientFactory) {
@@ -224,8 +225,8 @@ public class RetryableFeignLoadBalancerTests {
 		doThrow(new IOException("boom")).doReturn(response).when(client)
 				.execute(any(Request.class), any(Request.Options.class));
 
-		RetryableFeignLoadBalancer feignLb = new RetryableFeignLoadBalancer(this.lb,
+		RetryableFeignLoadBalancer feignLb = new RetryableFeignLoadBalancer(lb, config,
-				config, this.inspector, loadBalancedRetryFactory);
+				inspector, loadBalancedRetryFactory);
 		FeignLoadBalancer.RibbonResponse ribbonResponse = feignLb.execute(request, null);
 		assertThat(ribbonResponse.toResponse().status()).isEqualTo(200);
 		verify(client, times(2)).execute(any(Request.class), any(Request.Options.class));
@@ -234,8 +235,7 @@ public class RetryableFeignLoadBalancerTests {
 
 	@Test
 	public void executeRetryOnStatusCode() throws Exception {
-		RibbonLoadBalancerContext lbContext = new RibbonLoadBalancerContext(this.lb,
+		RibbonLoadBalancerContext lbContext = new RibbonLoadBalancerContext(lb, config);
-				this.config);
 		SpringClientFactory clientFactory = mock(SpringClientFactory.class);
 		IClientConfig config = mock(IClientConfig.class);
 		doReturn(1).when(config).get(eq(CommonClientConfigKey.MaxAutoRetries), anyInt());
@@ -243,9 +243,9 @@ public class RetryableFeignLoadBalancerTests {
 				anyInt());
 		doReturn(true).when(config)
 				.get(eq(CommonClientConfigKey.OkToRetryOnAllOperations), eq(false));
-		doReturn(this.defaultConnectTimeout).when(config)
+		doReturn(defaultConnectTimeout).when(config)
 				.get(eq(CommonClientConfigKey.ConnectTimeout));
-		doReturn(this.defaultReadTimeout).when(config)
+		doReturn(defaultReadTimeout).when(config)
 				.get(eq(CommonClientConfigKey.ReadTimeout));
 		doReturn("404").when(config).getPropertyAsString(
 				eq(RibbonLoadBalancedRetryPolicy.RETRYABLE_STATUS_CODES), eq(""));
@@ -270,8 +270,9 @@ public class RetryableFeignLoadBalancerTests {
 				.headers(new HashMap<>()).build();
 		doReturn(fourOFourResponse).doReturn(response).when(client)
 				.execute(any(Request.class), any(Request.Options.class));
-		RetryableFeignLoadBalancer feignLb = new RetryableFeignLoadBalancer(this.lb,
+		when(config.get(eq(FollowRedirects), any())).thenReturn(true);
-				config, this.inspector, loadBalancedRetryFactory);
+		RetryableFeignLoadBalancer feignLb = new RetryableFeignLoadBalancer(lb, config,
+				inspector, loadBalancedRetryFactory);
 		FeignLoadBalancer.RibbonResponse ribbonResponse = feignLb.execute(request, null);
 		assertThat(ribbonResponse.toResponse().status()).isEqualTo(200);
 		verify(client, times(2)).execute(any(Request.class), any(Request.Options.class));
@@ -281,11 +282,10 @@ public class RetryableFeignLoadBalancerTests {
 	@Test
 	public void executeRetryOnStatusCodeWithEmptyBody() throws Exception {
 		int retriesNextServer = 0;
-		when(this.config.get(MaxAutoRetriesNextServer,
+		when(config.get(MaxAutoRetriesNextServer, DEFAULT_MAX_AUTO_RETRIES_NEXT_SERVER))
-				DEFAULT_MAX_AUTO_RETRIES_NEXT_SERVER)).thenReturn(retriesNextServer);
+				.thenReturn(retriesNextServer);
-		doReturn(new Server("foo", 80)).when(this.lb).chooseServer(any());
+		doReturn(new Server("foo", 80)).when(lb).chooseServer(any());
-		RibbonLoadBalancerContext lbContext = new RibbonLoadBalancerContext(this.lb,
+		RibbonLoadBalancerContext lbContext = new RibbonLoadBalancerContext(lb, config);
-				this.config);
 		SpringClientFactory clientFactory = mock(SpringClientFactory.class);
 		IClientConfig config = mock(IClientConfig.class);
 		doReturn(1).when(config).get(eq(CommonClientConfigKey.MaxAutoRetries), anyInt());
@@ -293,9 +293,9 @@ public class RetryableFeignLoadBalancerTests {
 				.get(eq(CommonClientConfigKey.MaxAutoRetriesNextServer), anyInt());
 		doReturn(true).when(config)
 				.get(eq(CommonClientConfigKey.OkToRetryOnAllOperations), eq(false));
-		doReturn(this.defaultConnectTimeout).when(config)
+		doReturn(defaultConnectTimeout).when(config)
 				.get(eq(CommonClientConfigKey.ConnectTimeout));
-		doReturn(this.defaultReadTimeout).when(config)
+		doReturn(defaultReadTimeout).when(config)
 				.get(eq(CommonClientConfigKey.ReadTimeout));
 		doReturn("404").when(config).getPropertyAsString(
 				eq(RibbonLoadBalancedRetryPolicy.RETRYABLE_STATUS_CODES), eq(""));
@@ -320,8 +320,9 @@ public class RetryableFeignLoadBalancerTests {
 				.headers(new HashMap<>()).build();
 		doReturn(fourOFourResponse).doReturn(response).when(client)
 				.execute(any(Request.class), any(Request.Options.class));
-		RetryableFeignLoadBalancer feignLb = new RetryableFeignLoadBalancer(this.lb,
+		when(config.get(eq(FollowRedirects), any())).thenReturn(true);
-				config, this.inspector, loadBalancedRetryFactory);
+		RetryableFeignLoadBalancer feignLb = new RetryableFeignLoadBalancer(lb, config,
+				inspector, loadBalancedRetryFactory);
 		FeignLoadBalancer.RibbonResponse ribbonResponse = feignLb.execute(request, null);
 		assertThat(ribbonResponse.toResponse().status()).isEqualTo(404);
 		assertThat(ribbonResponse.toResponse().body().length())
@@ -332,8 +333,7 @@ public class RetryableFeignLoadBalancerTests {
 
 	@Test
 	public void getRequestSpecificRetryHandler() throws Exception {
-		RibbonLoadBalancerContext lbContext = new RibbonLoadBalancerContext(this.lb,
+		RibbonLoadBalancerContext lbContext = new RibbonLoadBalancerContext(lb, config);
-				this.config);
 		SpringClientFactory clientFactory = mock(SpringClientFactory.class);
 		doReturn(lbContext).when(clientFactory).getLoadBalancerContext(any(String.class));
 		RibbonLoadBalancedRetryFactory loadBalancedRetryFactory = new RibbonLoadBalancedRetryFactory(
@@ -347,10 +347,10 @@ public class RetryableFeignLoadBalancerTests {
 				.headers(new HashMap<>()).build();
 		doReturn(response).when(client).execute(any(Request.class),
 				any(Request.Options.class));
-		RetryableFeignLoadBalancer feignLb = new RetryableFeignLoadBalancer(this.lb,
+		RetryableFeignLoadBalancer feignLb = new RetryableFeignLoadBalancer(lb, config,
-				this.config, this.inspector, loadBalancedRetryFactory);
+				inspector, loadBalancedRetryFactory);
 		RequestSpecificRetryHandler retryHandler = feignLb
-				.getRequestSpecificRetryHandler(request, this.config);
+				.getRequestSpecificRetryHandler(request, config);
 		assertThat(retryHandler.getMaxRetriesOnNextServer()).isEqualTo(1);
 		assertThat(retryHandler.getMaxRetriesOnSameServer()).isEqualTo(1);
 
@@ -358,8 +358,7 @@ public class RetryableFeignLoadBalancerTests {
 
 	@Test
 	public void choose() throws Exception {
-		RibbonLoadBalancerContext lbContext = new RibbonLoadBalancerContext(this.lb,
+		RibbonLoadBalancerContext lbContext = new RibbonLoadBalancerContext(lb, config);
-				this.config);
 		SpringClientFactory clientFactory = mock(SpringClientFactory.class);
 		doReturn(lbContext).when(clientFactory).getLoadBalancerContext(any(String.class));
 		RibbonLoadBalancedRetryFactory loadBalancedRetryFactory = new RibbonLoadBalancedRetryFactory(
@@ -367,8 +366,6 @@ public class RetryableFeignLoadBalancerTests {
 		Request feignRequest = Request.create(GET, "https://foo", new HashMap<>(),
 				new byte[] {}, UTF_8, null);
 		Client client = mock(Client.class);
-		FeignLoadBalancer.RibbonRequest request = new FeignLoadBalancer.RibbonRequest(
-				client, feignRequest, new URI("https://foo"));
 		Response response = Response.builder().request(feignRequest).status(200)
 				.headers(new HashMap<>()).build();
 		doReturn(response).when(client).execute(any(Request.class),
@@ -405,7 +402,7 @@ public class RetryableFeignLoadBalancerTests {
 					public List<Server> getAllServers() {
 						return null;
 					}
-				}, this.config, this.inspector, loadBalancedRetryFactory);
+				}, config, inspector, loadBalancedRetryFactory);
 		ServiceInstance serviceInstance = feignLb.choose("foo");
 		assertThat(serviceInstance.getHost()).isEqualTo("foo");
 		assertThat(serviceInstance.getPort()).isEqualTo(80);
@@ -414,8 +411,7 @@ public class RetryableFeignLoadBalancerTests {
 
 	@Test
 	public void retryListenerTest() throws Exception {
-		RibbonLoadBalancerContext lbContext = new RibbonLoadBalancerContext(this.lb,
+		RibbonLoadBalancerContext lbContext = new RibbonLoadBalancerContext(lb, config);
-				this.config);
 		SpringClientFactory clientFactory = mock(SpringClientFactory.class);
 		IClientConfig config = mock(IClientConfig.class);
 		doReturn(1).when(config).get(eq(CommonClientConfigKey.MaxAutoRetries), anyInt());
@@ -423,14 +419,15 @@ public class RetryableFeignLoadBalancerTests {
 				anyInt());
 		doReturn(true).when(config)
 				.get(eq(CommonClientConfigKey.OkToRetryOnAllOperations), eq(false));
-		doReturn(this.defaultConnectTimeout).when(config)
+		doReturn(defaultConnectTimeout).when(config)
 				.get(eq(CommonClientConfigKey.ConnectTimeout));
-		doReturn(this.defaultReadTimeout).when(config)
+		doReturn(defaultReadTimeout).when(config)
 				.get(eq(CommonClientConfigKey.ReadTimeout));
 		doReturn("").when(config).getPropertyAsString(
 				eq(RibbonLoadBalancedRetryPolicy.RETRYABLE_STATUS_CODES), eq(""));
 		doReturn(config).when(clientFactory).getClientConfig(eq("default"));
 		doReturn(lbContext).when(clientFactory).getLoadBalancerContext(any(String.class));
+		when(config.get(eq(FollowRedirects), any())).thenReturn(true);
 		MyBackOffPolicy backOffPolicy = new MyBackOffPolicy();
 		MyRetryListener myRetryListener = new MyRetryListener();
 		RibbonLoadBalancedRetryFactory loadBalancedRetryFactory = new RibbonLoadBalancedRetryFactory(
@@ -455,8 +452,8 @@ public class RetryableFeignLoadBalancerTests {
 		doThrow(new IOException("boom")).doReturn(response).when(client)
 				.execute(any(Request.class), any(Request.Options.class));
 
-		RetryableFeignLoadBalancer feignLb = new RetryableFeignLoadBalancer(this.lb,
+		RetryableFeignLoadBalancer feignLb = new RetryableFeignLoadBalancer(lb, config,
-				config, this.inspector, loadBalancedRetryFactory);
+				inspector, loadBalancedRetryFactory);
 		FeignLoadBalancer.RibbonResponse ribbonResponse = feignLb.execute(request, null);
 		assertThat(ribbonResponse.toResponse().status()).isEqualTo(200);
 		verify(client, times(2)).execute(any(Request.class), any(Request.Options.class));
@@ -466,8 +463,7 @@ public class RetryableFeignLoadBalancerTests {
 
 	@Test(expected = TerminatedRetryException.class)
 	public void retryListenerTestNoRetry() throws Exception {
-		RibbonLoadBalancerContext lbContext = new RibbonLoadBalancerContext(this.lb,
+		RibbonLoadBalancerContext lbContext = new RibbonLoadBalancerContext(lb, config);
-				this.config);
 		SpringClientFactory clientFactory = mock(SpringClientFactory.class);
 		IClientConfig config = mock(IClientConfig.class);
 		doReturn(1).when(config).get(eq(CommonClientConfigKey.MaxAutoRetries), anyInt());
@@ -475,14 +471,15 @@ public class RetryableFeignLoadBalancerTests {
 				anyInt());
 		doReturn(true).when(config)
 				.get(eq(CommonClientConfigKey.OkToRetryOnAllOperations), eq(false));
-		doReturn(this.defaultConnectTimeout).when(config)
+		doReturn(defaultConnectTimeout).when(config)
 				.get(eq(CommonClientConfigKey.ConnectTimeout));
-		doReturn(this.defaultReadTimeout).when(config)
+		doReturn(defaultReadTimeout).when(config)
 				.get(eq(CommonClientConfigKey.ReadTimeout));
 		doReturn("").when(config).getPropertyAsString(
 				eq(RibbonLoadBalancedRetryPolicy.RETRYABLE_STATUS_CODES), eq(""));
 		doReturn(config).when(clientFactory).getClientConfig(eq("default"));
 		doReturn(lbContext).when(clientFactory).getLoadBalancerContext(any(String.class));
+		when(config.get(eq(FollowRedirects), any())).thenReturn(true);
 		MyBackOffPolicy backOffPolicy = new MyBackOffPolicy();
 		MyRetryListenerNotRetry myRetryListenerNotRetry = new MyRetryListenerNotRetry();
 		RibbonLoadBalancedRetryFactory loadBalancedRetryFactory = new RibbonLoadBalancedRetryFactory(
@@ -502,15 +499,14 @@ public class RetryableFeignLoadBalancerTests {
 		Client client = mock(Client.class);
 		FeignLoadBalancer.RibbonRequest request = new FeignLoadBalancer.RibbonRequest(
 				client, feignRequest, new URI("https://listener"));
-		RetryableFeignLoadBalancer feignLb = new RetryableFeignLoadBalancer(this.lb,
+		RetryableFeignLoadBalancer feignLb = new RetryableFeignLoadBalancer(lb, config,
-				config, this.inspector, loadBalancedRetryFactory);
+				inspector, loadBalancedRetryFactory);
-		FeignLoadBalancer.RibbonResponse ribbonResponse = feignLb.execute(request, null);
+		feignLb.execute(request, null);
 	}
 
 	@Test
 	public void retryWithDefaultConstructorTest() throws Exception {
-		RibbonLoadBalancerContext lbContext = new RibbonLoadBalancerContext(this.lb,
+		RibbonLoadBalancerContext lbContext = new RibbonLoadBalancerContext(lb, config);
-				this.config);
 		SpringClientFactory clientFactory = mock(SpringClientFactory.class);
 		IClientConfig config = mock(IClientConfig.class);
 		doReturn(1).when(config).get(eq(CommonClientConfigKey.MaxAutoRetries), anyInt());
@@ -518,14 +514,15 @@ public class RetryableFeignLoadBalancerTests {
 				anyInt());
 		doReturn(true).when(config)
 				.get(eq(CommonClientConfigKey.OkToRetryOnAllOperations), eq(false));
-		doReturn(this.defaultConnectTimeout).when(config)
+		doReturn(defaultConnectTimeout).when(config)
 				.get(eq(CommonClientConfigKey.ConnectTimeout));
-		doReturn(this.defaultReadTimeout).when(config)
+		doReturn(defaultReadTimeout).when(config)
 				.get(eq(CommonClientConfigKey.ReadTimeout));
 		doReturn("").when(config).getPropertyAsString(
 				eq(RibbonLoadBalancedRetryPolicy.RETRYABLE_STATUS_CODES), eq(""));
 		doReturn(config).when(clientFactory).getClientConfig(eq("default"));
 		doReturn(lbContext).when(clientFactory).getLoadBalancerContext(any(String.class));
+		when(config.get(eq(FollowRedirects), any())).thenReturn(true);
 		MyBackOffPolicy backOffPolicy = new MyBackOffPolicy();
 		RibbonLoadBalancedRetryFactory loadBalancedRetryPolicyFactory = new RibbonLoadBalancedRetryFactory(
 				clientFactory) {
@@ -543,8 +540,8 @@ public class RetryableFeignLoadBalancerTests {
 				.headers(new HashMap<>()).build();
 		doThrow(new IOException("boom")).doReturn(response).when(client)
 				.execute(any(Request.class), any(Request.Options.class));
-		RetryableFeignLoadBalancer feignLb = new RetryableFeignLoadBalancer(this.lb,
+		RetryableFeignLoadBalancer feignLb = new RetryableFeignLoadBalancer(lb, config,
-				config, this.inspector, loadBalancedRetryPolicyFactory);
+				inspector, loadBalancedRetryPolicyFactory);
 		FeignLoadBalancer.RibbonResponse ribbonResponse = feignLb.execute(request, null);
 		assertThat(ribbonResponse.toResponse().status()).isEqualTo(200);
 		verify(client, times(2)).execute(any(Request.class), any(Request.Options.class));
@@ -553,8 +550,7 @@ public class RetryableFeignLoadBalancerTests {
 
 	@Test
 	public void executeRetryFail() throws Exception {
-		RibbonLoadBalancerContext lbContext = new RibbonLoadBalancerContext(this.lb,
+		RibbonLoadBalancerContext lbContext = new RibbonLoadBalancerContext(lb, config);
-				this.config);
 		lbContext.setRetryHandler(new DefaultLoadBalancerRetryHandler(1, 0, true));
 		SpringClientFactory clientFactory = mock(SpringClientFactory.class);
 		IClientConfig config = mock(IClientConfig.class);
@@ -563,14 +559,15 @@ public class RetryableFeignLoadBalancerTests {
 				anyInt());
 		doReturn(true).when(config)
 				.get(eq(CommonClientConfigKey.OkToRetryOnAllOperations), eq(false));
-		doReturn(this.defaultConnectTimeout).when(config)
+		doReturn(defaultConnectTimeout).when(config)
 				.get(eq(CommonClientConfigKey.ConnectTimeout));
-		doReturn(this.defaultReadTimeout).when(config)
+		doReturn(defaultReadTimeout).when(config)
 				.get(eq(CommonClientConfigKey.ReadTimeout));
 		doReturn("404").when(config).getPropertyAsString(
 				eq(RibbonLoadBalancedRetryPolicy.RETRYABLE_STATUS_CODES), eq(""));
 		doReturn(config).when(clientFactory).getClientConfig(eq("default"));
 		doReturn(lbContext).when(clientFactory).getLoadBalancerContext(any(String.class));
+		when(config.get(eq(FollowRedirects), any())).thenReturn(true);
 		MyBackOffPolicy backOffPolicy = new MyBackOffPolicy();
 		RibbonLoadBalancedRetryFactory loadBalancedRetryFactory = new RibbonLoadBalancedRetryFactory(
 				clientFactory) {
@@ -598,28 +595,28 @@ public class RetryableFeignLoadBalancerTests {
 					}
 
 					@Override
-					public InputStream asInputStream() throws IOException {
+					public InputStream asInputStream() {
 						return new ByteArrayInputStream("test".getBytes());
 					}
 
 					@Override
-					public Reader asReader() throws IOException {
+					public Reader asReader() {
 						return new InputStreamReader(asInputStream(), UTF_8);
 					}
 
 					@Override
-					public Reader asReader(Charset charset) throws IOException {
+					public Reader asReader(Charset charset) {
 						return new InputStreamReader(asInputStream(), charset);
 					}
 
 					@Override
-					public void close() throws IOException {
+					public void close() {
 					}
 				}).build();
 		doReturn(fourOFourResponse).when(client).execute(any(Request.class),
 				any(Request.Options.class));
-		RetryableFeignLoadBalancer feignLb = new RetryableFeignLoadBalancer(this.lb,
+		RetryableFeignLoadBalancer feignLb = new RetryableFeignLoadBalancer(lb, config,
-				config, this.inspector, loadBalancedRetryFactory);
+				inspector, loadBalancedRetryFactory);
 		FeignLoadBalancer.RibbonResponse ribbonResponse = feignLb.execute(request, null);
 		verify(client, times(2)).execute(any(Request.class), any(Request.Options.class));
 		assertThat(backOffPolicy.getCount()).isEqualTo(1);
@@ -629,7 +626,7 @@ public class RetryableFeignLoadBalancerTests {
 		assertThat(new String(buf, 0, read)).isEqualTo("test");
 	}
 
-	class MyBackOffPolicy implements BackOffPolicy {
+	static class MyBackOffPolicy implements BackOffPolicy {
 
 		private int count = 0;
 
@@ -641,16 +638,16 @@ public class RetryableFeignLoadBalancerTests {
 		@Override
 		public void backOff(BackOffContext backOffContext)
 				throws BackOffInterruptedException {
-			this.count++;
+			count++;
 		}
 
 		public int getCount() {
-			return this.count;
+			return count;
 		}
 
 	}
 
-	class MyRetryListener implements RetryListener {
+	static class MyRetryListener implements RetryListener {
 
 		private int onError = 0;
 
@@ -669,16 +666,16 @@ public class RetryableFeignLoadBalancerTests {
 		@Override
 		public <T, E extends Throwable> void onError(RetryContext context,
 				RetryCallback<T, E> callback, Throwable throwable) {
-			this.onError++;
+			onError++;
 		}
 
 		public int getOnError() {
-			return this.onError;
+			return onError;
 		}
 
 	}
 
-	class MyRetryListenerNotRetry implements RetryListener {
+	static class MyRetryListenerNotRetry implements RetryListener {
 
 		@Override
 		public <T, E extends Throwable> boolean open(RetryContext context,

spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/support/AbstractSpringMvcContractIntegrationTests.java

@@ -0,0 +1,116 @@
+/*
+ * Copyright 2013-2020 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.cloud.openfeign.support;
+
+import java.nio.charset.Charset;
+
+import feign.Response;
+import feign.codec.Decoder;
+import feign.codec.Encoder;
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeAll;
+
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.cloud.openfeign.EnableFeignClients;
+import org.springframework.cloud.openfeign.FeignClient;
+import org.springframework.cloud.openfeign.test.NoSecurityConfiguration;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Import;
+import org.springframework.http.HttpHeaders;
+import org.springframework.util.SocketUtils;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestHeader;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+/**
+ * Abstract class for the integration tests for {@link SpringMvcContract}.
+ *
+ * @author Ram Anaswara
+ */
+public class AbstractSpringMvcContractIntegrationTests {
+
+	@BeforeAll
+	public static void beforeClass() {
+		System.setProperty("server.port",
+				String.valueOf(SocketUtils.findAvailableTcpPort()));
+	}
+
+	@AfterAll
+	public static void afterClass() {
+		System.clearProperty("server.port");
+	}
+
+	protected String getUrlQueryParam(Response response) {
+		return response.request().requestTemplate().queries().get("url").stream()
+				.findFirst().orElseThrow(IllegalStateException::new);
+	}
+
+	@FeignClient(name = "test", url = "http://localhost:${server.port}/",
+			configuration = NoCodecsFeignConfiguration.class)
+	interface TestClient {
+
+		@PostMapping("/test")
+		Object sendMessage(@RequestBody String message,
+				@RequestHeader(HttpHeaders.CONTENT_TYPE) String acceptHeader);
+
+		@GetMapping("/get")
+		Object getMessage(@RequestParam String url);
+
+	}
+
+	@Configuration(proxyBeanMethods = false)
+	@EnableFeignClients(clients = TestClient.class)
+	@EnableAutoConfiguration
+	@RestController
+	@Import(NoSecurityConfiguration.class)
+	protected static class Config {
+
+		@PostMapping("/test")
+		Object sendMessage(@RequestBody String message,
+				@RequestHeader(HttpHeaders.CONTENT_TYPE) String acceptHeader) {
+			return message;
+		}
+
+		@GetMapping("/get")
+		Object getMessage(@RequestParam String url) {
+			return url;
+		}
+
+	}
+
+	// Avoid feign.codec.EncodeException - this feature works for users that override
+	// Encoder
+	protected static class NoCodecsFeignConfiguration {
+
+		@Bean
+		public Decoder decoder() {
+			return (response, type) -> response;
+		}
+
+		@Bean
+		public Encoder encoder() {
+			return (object, bodyType, request) -> request
+					.body(object.toString().getBytes(), Charset.defaultCharset());
+		}
+
+	}
+
+}

spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/support/FeignHttpClientPropertiesTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,6 +16,8 @@
 
 package org.springframework.cloud.openfeign.support;
 
+import java.util.concurrent.TimeUnit;
+
 import org.junit.After;
 import org.junit.Test;
 import org.junit.runner.RunWith;
@@ -23,6 +25,8 @@ import org.junit.runner.RunWith;
 import org.springframework.boot.autoconfigure.context.PropertyPlaceholderAutoConfiguration;
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
 import org.springframework.boot.test.util.TestPropertyValues;
+import org.springframework.cloud.openfeign.support.FeignHttpClientProperties.Hc5Properties.PoolConcurrencyPolicy;
+import org.springframework.cloud.openfeign.support.FeignHttpClientProperties.Hc5Properties.PoolReusePolicy;
 import org.springframework.context.annotation.AnnotationConfigApplicationContext;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
@@ -30,9 +34,12 @@ import org.springframework.test.annotation.DirtiesContext;
 import org.springframework.test.context.junit4.SpringRunner;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.springframework.cloud.openfeign.support.FeignHttpClientProperties.Hc5Properties.DEFAULT_SOCKET_TIMEOUT;
+import static org.springframework.cloud.openfeign.support.FeignHttpClientProperties.Hc5Properties.DEFAULT_SOCKET_TIMEOUT_UNIT;
 
 /**
  * @author Ryan Baxter
+ * @author Nguyen Ky Thanh
  */
 @RunWith(SpringRunner.class)
 @DirtiesContext
@@ -62,16 +69,32 @@ public class FeignHttpClientPropertiesTests {
 				.isEqualTo(FeignHttpClientProperties.DEFAULT_DISABLE_SSL_VALIDATION);
 		assertThat(getProperties().isFollowRedirects())
 				.isEqualTo(FeignHttpClientProperties.DEFAULT_FOLLOW_REDIRECTS);
+		assertThat(getProperties().getHc5().getPoolConcurrencyPolicy())
+				.isEqualTo(PoolConcurrencyPolicy.STRICT);
+		assertThat(getProperties().getHc5().getPoolReusePolicy())
+				.isEqualTo(PoolReusePolicy.FIFO);
+		assertThat(getProperties().getHc5().getSocketTimeout())
+				.isEqualTo(DEFAULT_SOCKET_TIMEOUT);
+		assertThat(getProperties().getHc5().getSocketTimeoutUnit())
+				.isEqualTo(DEFAULT_SOCKET_TIMEOUT_UNIT);
 	}
 
 	@Test
 	public void testCustomization() {
-		TestPropertyValues.of("feign.httpclient.maxConnections=2",
+		TestPropertyValues
-				"feign.httpclient.connectionTimeout=2",
+				.of("feign.httpclient.maxConnections=2",
-				"feign.httpclient.maxConnectionsPerRoute=2",
+						"feign.httpclient.connectionTimeout=2",
-				"feign.httpclient.timeToLive=2",
+						"feign.httpclient.maxConnectionsPerRoute=2",
-				"feign.httpclient.disableSslValidation=true",
+						"feign.httpclient.timeToLive=2",
-				"feign.httpclient.followRedirects=false").applyTo(this.context);
+						"feign.httpclient.disableSslValidation=true",
+						"feign.httpclient.followRedirects=false",
+						"feign.httpclient.disableSslValidation=true",
+						"feign.httpclient.followRedirects=false",
+						"feign.httpclient.hc5.poolConcurrencyPolicy=lax",
+						"feign.httpclient.hc5.poolReusePolicy=lifo",
+						"feign.httpclient.hc5.socketTimeout=200",
+						"feign.httpclient.hc5.socketTimeoutUnit=milliseconds")
+				.applyTo(this.context);
 		setupContext();
 		assertThat(getProperties().getMaxConnections()).isEqualTo(2);
 		assertThat(getProperties().getConnectionTimeout()).isEqualTo(2);
@@ -79,6 +102,13 @@ public class FeignHttpClientPropertiesTests {
 		assertThat(getProperties().getTimeToLive()).isEqualTo(2L);
 		assertThat(getProperties().isDisableSslValidation()).isTrue();
 		assertThat(getProperties().isFollowRedirects()).isFalse();
+		assertThat(getProperties().getHc5().getPoolConcurrencyPolicy())
+				.isEqualTo(PoolConcurrencyPolicy.LAX);
+		assertThat(getProperties().getHc5().getPoolReusePolicy())
+				.isEqualTo(PoolReusePolicy.LIFO);
+		assertThat(getProperties().getHc5().getSocketTimeout()).isEqualTo(200);
+		assertThat(getProperties().getHc5().getSocketTimeoutUnit())
+				.isEqualTo(TimeUnit.MILLISECONDS);
 	}
 
 	private void setupContext() {

spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/support/PageJacksonModuleTests.java

@@ -19,14 +19,18 @@ package org.springframework.cloud.openfeign.support;
 import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import org.junit.jupiter.api.BeforeAll;
-import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.ValueSource;
 
 import org.springframework.data.domain.Page;
 
 import static org.assertj.core.api.Assertions.assertThat;
 
 /**
+ * Test for {@link PageJacksonModule}.
+ *
  * @author Ruben Vervaeke
+ * @author Olga Maciaszek-Sharma
  */
 public class PageJacksonModuleTests {
 
@@ -38,10 +42,13 @@ public class PageJacksonModuleTests {
 		objectMapper.registerModule(new PageJacksonModule());
 	}
 
-	@Test
+	@ParameterizedTest
-	public void deserializePage() throws JsonProcessingException {
+	@ValueSource(strings = { "totalElements", "total-elements", "total_elements",
+			"totalelements", "TotalElements" })
+	public void deserializePage(String totalElements) throws JsonProcessingException {
 		// Given
-		String pageJson = "{\"content\":[\"A name\"], \"number\":1, \"size\":2, \"totalElements\": 3}";
+		String pageJson = "{\"content\":[\"A name\"], \"number\":1, \"size\":2, \""
+				+ totalElements + "\": 3}";
 		// When
 		Page<?> result = objectMapper.readValue(pageJson, Page.class);
 		// Then

spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/support/SpringEncoderTests.java

@@ -36,9 +36,11 @@ import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.boot.test.context.SpringBootTest.WebEnvironment;
 import org.springframework.cloud.openfeign.FeignContext;
 import org.springframework.cloud.openfeign.encoding.HttpEncoding;
+import org.springframework.context.ApplicationContext;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.core.ParameterizedTypeReference;
+import org.springframework.core.io.Resource;
 import org.springframework.http.HttpInputMessage;
 import org.springframework.http.HttpOutputMessage;
 import org.springframework.http.MediaType;
@@ -47,6 +49,7 @@ import org.springframework.http.converter.GenericHttpMessageConverter;
 import org.springframework.http.converter.HttpMessageConverter;
 import org.springframework.http.converter.HttpMessageNotReadableException;
 import org.springframework.http.converter.HttpMessageNotWritableException;
+import org.springframework.http.converter.ResourceHttpMessageConverter;
 import org.springframework.mock.web.MockMultipartFile;
 import org.springframework.test.annotation.DirtiesContext;
 import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
@@ -57,13 +60,16 @@ import static org.assertj.core.api.Assertions.assertThat;
 import static org.springframework.http.HttpHeaders.ACCEPT;
 import static org.springframework.http.HttpHeaders.CONTENT_LENGTH;
 import static org.springframework.http.HttpHeaders.CONTENT_TYPE;
+import static org.springframework.http.MediaType.APPLICATION_FORM_URLENCODED_VALUE;
 import static org.springframework.http.MediaType.APPLICATION_OCTET_STREAM_VALUE;
 import static org.springframework.http.MediaType.MULTIPART_FORM_DATA_VALUE;
+import static org.springframework.http.MediaType.TEXT_PLAIN_VALUE;
 
 /**
  * @author Spencer Gibb
  * @author Olga Maciaszek-Sharma
  * @author Ahmad Mozafarnia
+ * @author Can Bezmen
  */
 @RunWith(SpringJUnit4ClassRunner.class)
 @SpringBootTest(classes = SpringEncoderTests.Application.class,
@@ -79,6 +85,9 @@ public class SpringEncoderTests {
 	@Qualifier("myHttpMessageConverter")
 	private HttpMessageConverter<?> myConverter;
 
+	@Autowired
+	private ApplicationContext applicationContext;
+
 	@Autowired
 	@Qualifier("myGenericHttpMessageConverter")
 	private GenericHttpMessageConverter<?> myGenericConverter;
@@ -185,6 +194,44 @@ public class SpringEncoderTests {
 				.as("Body content cannot be decoded").contains("hi");
 	}
 
+	@Test
+	public void testFromURLEncodedValue() {
+		Encoder encoder = context.getInstance("formUrlEncoded", Encoder.class);
+		assertThat(encoder).isNotNull();
+		RequestTemplate request = new RequestTemplate();
+		request.header(CONTENT_TYPE, APPLICATION_FORM_URLENCODED_VALUE);
+		String body = "test";
+		encoder.encode(body, String.class, request);
+		assertThat(new String(request.requestBody().asBytes()))
+				.as("Body content cannot be decoded").contains(body);
+	}
+
+	@Test
+	public void testNoCharsetForBinaryFiles() {
+		Encoder encoder = context.getInstance("test", Encoder.class);
+		assertThat(encoder).isNotNull();
+		RequestTemplate request = new RequestTemplate();
+		request.header(CONTENT_TYPE, APPLICATION_OCTET_STREAM_VALUE);
+		Resource resource = applicationContext.getResource("classpath:dummy.pdf");
+
+		encoder.encode(resource, Resource.class, request);
+
+		assertThat(request.requestBody().getEncoding()).isEmpty();
+	}
+
+	@Test
+	public void testUTF8CharsetForTextFiles() {
+		Encoder encoder = context.getInstance("test", Encoder.class);
+		assertThat(encoder).isNotNull();
+		RequestTemplate request = new RequestTemplate();
+		request.header(CONTENT_TYPE, TEXT_PLAIN_VALUE);
+		String test = "test";
+
+		encoder.encode(test, String.class, request);
+
+		assertThat(request.requestBody().getEncoding().get().name()).isEqualTo("UTF-8");
+	}
+
 	protected interface TestClient {
 
 	}
@@ -213,6 +260,11 @@ public class SpringEncoderTests {
 			return new MyHttpMessageConverter();
 		}
 
+		@Bean
+		ResourceHttpMessageConverter resourceHttpMessageConverter() {
+			return new ResourceHttpMessageConverter();
+		}
+
 		@Bean
 		GenericHttpMessageConverter<?> myGenericHttpMessageConverter() {
 			return new MyGenericHttpMessageConverter();

spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/support/SpringMvcContractIntegrationTests.java

@@ -16,101 +16,41 @@
 
 package org.springframework.cloud.openfeign.support;
 
-import java.nio.charset.Charset;
+import feign.Response;
-
-import feign.codec.Decoder;
-import feign.codec.Encoder;
-import org.junit.jupiter.api.AfterAll;
-import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.Test;
 
 import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
 import org.springframework.boot.test.context.SpringBootTest;
-import org.springframework.cloud.openfeign.EnableFeignClients;
-import org.springframework.cloud.openfeign.FeignClient;
-import org.springframework.cloud.openfeign.test.NoSecurityConfiguration;
-import org.springframework.context.annotation.Bean;
-import org.springframework.context.annotation.Configuration;
-import org.springframework.context.annotation.Import;
-import org.springframework.http.HttpHeaders;
-import org.springframework.util.SocketUtils;
-import org.springframework.web.bind.annotation.PostMapping;
-import org.springframework.web.bind.annotation.RequestBody;
-import org.springframework.web.bind.annotation.RequestHeader;
-import org.springframework.web.bind.annotation.RestController;
 
+import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.assertThatCode;
 
 /**
- * Integration tests for {@link SpringMvcContract}
+ * Integration tests for {@link SpringMvcContract}.
  *
  * @author Olga Maciaszek-Sharma
+ * @author Ram Anaswara
  */
-@SpringBootTest(classes = SpringMvcContractIntegrationTests.Config.class,
+@SpringBootTest(classes = AbstractSpringMvcContractIntegrationTests.Config.class,
 		webEnvironment = SpringBootTest.WebEnvironment.DEFINED_PORT)
-public class SpringMvcContractIntegrationTests {
+public class SpringMvcContractIntegrationTests
+		extends AbstractSpringMvcContractIntegrationTests {
 
 	@Autowired
 	private TestClient client;
 
-	@BeforeAll
-	public static void beforeClass() {
-		System.setProperty("server.port",
-				String.valueOf(SocketUtils.findAvailableTcpPort()));
-	}
-
-	@AfterAll
-	public static void afterClass() {
-		System.clearProperty("server.port");
-	}
-
 	@Test
 	public void shouldNotThrowInvalidMediaTypeExceptionWhenContentTypeTemplateUsed() {
 		assertThatCode(() -> client.sendMessage("test", "text/markdown"))
 				.doesNotThrowAnyException();
 	}
 
-	@FeignClient(name = "test", url = "http://localhost:${server.port}/",
+	@Test
-			configuration = NoCodecsFeignConfiguration.class)
+	public void feignClientShouldPreserveSlash() {
-	interface TestClient {
+		Response response = (Response) client.getMessage("https://www.google.com");
-
-		@PostMapping("/test")
-		Object sendMessage(@RequestBody String message,
-				@RequestHeader(HttpHeaders.CONTENT_TYPE) String acceptHeader);
-
-	}
-
-	@Configuration(proxyBeanMethods = false)
-	@EnableFeignClients(clients = TestClient.class)
-	@EnableAutoConfiguration
-	@RestController
-	@Import(NoSecurityConfiguration.class)
-	protected static class Config {
-
-		@PostMapping("/test")
-		Object sendMessage(@RequestBody String message,
-				@RequestHeader(HttpHeaders.CONTENT_TYPE) String acceptHeader) {
-			return message;
-		}
-
-	}
-
-	// avoid feign.codec.EncodeException - this feature works for users that override
-	// Encoder
-	protected static class NoCodecsFeignConfiguration {
-
-		@Bean
-		public Decoder decoder() {
-			return (response, type) -> response;
-		}
-
-		@Bean
-		public Encoder encoder() {
-			return (object, bodyType, request) -> request
-					.body(object.toString().getBytes(), Charset.defaultCharset());
-		}
 
+		String urlQueryParam = getUrlQueryParam(response);
+		assertThat(urlQueryParam).isEqualTo("https%3A//www.google.com");
 	}
 
 }

spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/support/SpringMvcContractSlashEncodingIntegrationTests.java

@@ -0,0 +1,49 @@
+/*
+ * Copyright 2013-2020 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.cloud.openfeign.support;
+
+import feign.Response;
+import org.junit.jupiter.api.Test;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Integration tests for {@link SpringMvcContract}.
+ *
+ * @author Ram Anaswara
+ */
+@SpringBootTest(classes = SpringMvcContractSlashEncodingIntegrationTests.Config.class,
+		webEnvironment = SpringBootTest.WebEnvironment.DEFINED_PORT,
+		properties = { "feign.client.decodeSlash=false" })
+public class SpringMvcContractSlashEncodingIntegrationTests
+		extends AbstractSpringMvcContractIntegrationTests {
+
+	@Autowired
+	private TestClient client;
+
+	@Test
+	public void feignClientShouldNotDecodeEncodedSlash() {
+		Response response = (Response) client.getMessage("https://www.google.com");
+
+		String urlQueryParam = getUrlQueryParam(response);
+		assertThat(urlQueryParam).isEqualTo("https%3A%2F%2Fwww.google.com");
+	}
+
+}

spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/support/SpringMvcContractTests.java

@@ -62,6 +62,7 @@ import static com.fasterxml.jackson.annotation.JsonAutoDetect.Visibility.ANY;
 import static com.fasterxml.jackson.annotation.JsonAutoDetect.Visibility.NONE;
 import static feign.CollectionFormat.SSV;
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatIllegalArgumentException;
 import static org.junit.Assume.assumeTrue;
 
 /**
@@ -118,11 +119,7 @@ public class SpringMvcContractTests {
 
 	@Before
 	public void setup() {
-		FormattingConversionServiceFactoryBean conversionServiceFactoryBean = new FormattingConversionServiceFactoryBean();
+		contract = new SpringMvcContract(Collections.emptyList(), getConversionService());
-		conversionServiceFactoryBean.afterPropertiesSet();
-		ConversionService conversionService = conversionServiceFactoryBean.getObject();
-
-		contract = new SpringMvcContract(Collections.emptyList(), conversionService);
 	}
 
 	@Test
@@ -136,6 +133,23 @@ public class SpringMvcContractTests {
 		assertThat(data.template().method()).isEqualTo("GET");
 		assertThat(data.template().headers().get("Accept").iterator().next())
 				.isEqualTo(MediaType.APPLICATION_JSON_VALUE);
+
+		assertThat(data.template().decodeSlash()).isTrue();
+	}
+
+	@Test
+	public void testProcessAnnotationOnMethod_Simple_SlashEncoded() throws Exception {
+		contract = new SpringMvcContract(Collections.emptyList(), getConversionService(),
+				false);
+
+		Method method = TestTemplate_Simple.class.getDeclaredMethod("getTest",
+				String.class);
+		MethodMetadata data = contract
+				.parseAndValidateMetadata(method.getDeclaringClass(), method);
+
+		assertThat(data.template().url()).isEqualTo("/test/{id}");
+
+		assertThat(data.template().decodeSlash()).isFalse();
 	}
 
 	@Test
@@ -169,18 +183,12 @@ public class SpringMvcContractTests {
 	}
 
 	@Test
-	public void testProcessAnnotations_Class_AnnotationsGetSpecificTest()
+	public void testProcessAnnotations_Class_Annotations_RequestMapping() {
-			throws Exception {
+		assertThatIllegalArgumentException().isThrownBy(() -> {
-		Method method = TestTemplate_Class_Annotations.class
+			Method method = TestTemplate_Class_RequestMapping.class
-				.getDeclaredMethod("getSpecificTest", String.class, String.class);
+					.getDeclaredMethod("getSpecificTest", String.class, String.class);
-		MethodMetadata data = contract
+			contract.parseAndValidateMetadata(method.getDeclaringClass(), method);
-				.parseAndValidateMetadata(method.getDeclaringClass(), method);
+		});
-
-		assertThat(data.template().url()).isEqualTo("/prepend/{classId}/test/{testId}");
-		assertThat(data.template().method()).isEqualTo("GET");
-
-		assertThat(data.indexToName().get(0).iterator().next()).isEqualTo("classId");
-		assertThat(data.indexToName().get(1).iterator().next()).isEqualTo("testId");
 	}
 
 	@Test
@@ -190,10 +198,12 @@ public class SpringMvcContractTests {
 		MethodMetadata data = contract
 				.parseAndValidateMetadata(method.getDeclaringClass(), method);
 
-		assertThat(data.template().url()).isEqualTo("/prepend/{classId}");
+		assertThat(data.template().url()).isEqualTo("/");
 		assertThat(data.template().method()).isEqualTo("GET");
 
 		assertThat(data.indexToName().get(0).iterator().next()).isEqualTo("classId");
+
+		assertThat(data.template().decodeSlash()).isTrue();
 	}
 
 	@Test
@@ -213,6 +223,9 @@ public class SpringMvcContractTests {
 
 		assertThat(data.indexToName().get(0).iterator().next())
 				.isEqualTo(data.indexToName().get(0).iterator().next());
+		assertThat(data.indexToName().get(0).iterator().next())
+				.isEqualTo(data.indexToName().get(0).iterator().next());
+		assertThat(data.template().decodeSlash()).isTrue();
 	}
 
 	@Test
@@ -250,8 +263,7 @@ public class SpringMvcContractTests {
 		MethodMetadata data = contract
 				.parseAndValidateMetadata(method.getDeclaringClass(), method);
 
-		assertThat(data.template().url())
+		assertThat(data.template().url()).isEqualTo("/test/{id}?amount=" + "{amount}");
-				.isEqualTo("/advanced/test/{id}?amount=" + "{amount}");
 		assertThat(data.template().method()).isEqualTo("PUT");
 		assertThat(data.template().headers().get("Accept").iterator().next())
 				.isEqualTo(MediaType.APPLICATION_JSON_VALUE);
@@ -286,8 +298,7 @@ public class SpringMvcContractTests {
 		MethodMetadata data = contract
 				.parseAndValidateMetadata(method.getDeclaringClass(), method);
 
-		assertThat(data.template().url())
+		assertThat(data.template().url()).isEqualTo("/test/{id}?amount=" + "{amount}");
-				.isEqualTo("/advanced/test/{id}?amount=" + "{amount}");
 		assertThat(data.template().method()).isEqualTo("PUT");
 		assertThat(data.template().headers().get("Accept").iterator().next())
 				.isEqualTo(MediaType.APPLICATION_JSON_VALUE);
@@ -311,8 +322,7 @@ public class SpringMvcContractTests {
 		MethodMetadata data = contract
 				.parseAndValidateMetadata(method.getDeclaringClass(), method);
 
-		assertThat(data.template().url())
+		assertThat(data.template().url()).isEqualTo("/test2?amount=" + "{amount}");
-				.isEqualTo("/advanced/test2?amount=" + "{amount}");
 		assertThat(data.template().method()).isEqualTo("PUT");
 		assertThat(data.template().headers().get("Accept").iterator().next())
 				.isEqualTo(MediaType.APPLICATION_JSON_VALUE);
@@ -374,7 +384,7 @@ public class SpringMvcContractTests {
 		MethodMetadata data = contract
 				.parseAndValidateMetadata(method.getDeclaringClass(), method);
 
-		assertThat(data.template().url()).isEqualTo("/advanced");
+		assertThat(data.template().url()).isEqualTo("/");
 		assertThat(data.template().method()).isEqualTo("GET");
 		assertThat(data.template().headers().get("Accept").iterator().next())
 				.isEqualTo(MediaType.APPLICATION_JSON_VALUE);
@@ -390,6 +400,22 @@ public class SpringMvcContractTests {
 		assertThat(data.template().method()).isEqualTo("GET");
 		assertThat(data.template().headers().get("Accept").iterator().next())
 				.isEqualTo(MediaType.APPLICATION_JSON_VALUE);
+		assertThat(data.template().decodeSlash()).isTrue();
+	}
+
+	@Test
+	public void testProcessAnnotations_Advanced3_DecodeSlashFlagNotModified()
+			throws Exception {
+		contract = new SpringMvcContract(Collections.emptyList(), getConversionService(),
+				false);
+
+		Method method = TestTemplate_Simple.class.getDeclaredMethod("getTest");
+		MethodMetadata data = contract
+				.parseAndValidateMetadata(method.getDeclaringClass(), method);
+
+		assertThat(data.template().url()).isEqualTo("/");
+
+		assertThat(data.template().decodeSlash()).isTrue();
 	}
 
 	@Test
@@ -468,7 +494,7 @@ public class SpringMvcContractTests {
 				.parseAndValidateMetadata(method.getDeclaringClass(), method);
 
 		assertThat(data.template().url())
-				.isEqualTo("/advanced/testfallback/{id}?amount=" + "{amount}");
+				.isEqualTo("/testfallback/{id}?amount=" + "{amount}");
 		assertThat(data.template().method()).isEqualTo("PUT");
 		assertThat(data.template().headers().get("Accept").iterator().next())
 				.isEqualTo(MediaType.APPLICATION_JSON_VALUE);
@@ -608,6 +634,12 @@ public class SpringMvcContractTests {
 		assertThat(data.formParams()).contains("file", "id");
 	}
 
+	private ConversionService getConversionService() {
+		FormattingConversionServiceFactoryBean conversionServiceFactoryBean = new FormattingConversionServiceFactoryBean();
+		conversionServiceFactoryBean.afterPropertiesSet();
+		return conversionServiceFactoryBean.getObject();
+	}
+
 	public interface TestTemplate_Simple {
 
 		@RequestMapping(value = "/test/{id}", method = RequestMethod.GET,
@@ -631,6 +663,14 @@ public class SpringMvcContractTests {
 	}
 
 	@RequestMapping("/prepend/{classId}")
+	public interface TestTemplate_Class_RequestMapping {
+
+		@RequestMapping(value = "/test/{testId}", method = RequestMethod.GET)
+		TestObject getSpecificTest(@PathVariable("classId") String classId,
+				@PathVariable("testId") String testId);
+
+	}
+
 	public interface TestTemplate_Class_Annotations {
 
 		@RequestMapping(value = "/test/{testId}", method = RequestMethod.GET)
@@ -735,7 +775,6 @@ public class SpringMvcContractTests {
 	}
 
 	@JsonAutoDetect
-	@RequestMapping("/advanced")
 	public interface TestTemplate_Advanced {
 
 		@CollectionFormat(SSV)

spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/valid/FeignClientTests.java

@@ -17,7 +17,6 @@
 package org.springframework.cloud.openfeign.valid;
 
 import java.lang.reflect.InvocationHandler;
-import java.lang.reflect.Method;
 import java.lang.reflect.Proxy;
 import java.text.ParseException;
 import java.time.LocalDate;
@@ -49,7 +48,6 @@ import feign.Feign;
 import feign.Logger;
 import feign.RequestInterceptor;
 import feign.RequestTemplate;
-import feign.Target;
 import feign.codec.EncodeException;
 import feign.hystrix.FallbackFactory;
 import feign.hystrix.SetterFactory;
@@ -91,6 +89,7 @@ import org.springframework.http.ResponseEntity;
 import org.springframework.mock.web.MockMultipartFile;
 import org.springframework.test.annotation.DirtiesContext;
 import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RequestHeader;
 import org.springframework.web.bind.annotation.RequestMapping;
@@ -102,6 +101,7 @@ import org.springframework.web.multipart.MultipartFile;
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.hamcrest.core.IsInstanceOf.instanceOf;
+import static org.springframework.http.MediaType.APPLICATION_FORM_URLENCODED_VALUE;
 
 /**
  * @author Spencer Gibb
@@ -110,6 +110,7 @@ import static org.hamcrest.core.IsInstanceOf.instanceOf;
  * @author Halvdan Hoem Grelland
  * @author Aaron Whiteside
  * @author Darren Foong
+ * @author Can Bezmen
  */
 @RunWith(SpringJUnit4ClassRunner.class)
 @SpringBootTest(classes = FeignClientTests.Application.class,
@@ -178,23 +179,23 @@ public class FeignClientTests {
 
 	@Test
 	public void testClient() {
-		assertThat(this.testClient).as("testClient was null").isNotNull();
+		assertThat(testClient).as("testClient was null").isNotNull();
-		assertThat(Proxy.isProxyClass(this.testClient.getClass()))
+		assertThat(Proxy.isProxyClass(testClient.getClass()))
 				.as("testClient is not a java Proxy").isTrue();
-		InvocationHandler invocationHandler = Proxy.getInvocationHandler(this.testClient);
+		InvocationHandler invocationHandler = Proxy.getInvocationHandler(testClient);
 		assertThat(invocationHandler).as("invocationHandler was null").isNotNull();
 	}
 
 	@Test
 	public void testRequestMappingClassLevelPropertyReplacement() {
-		Hello hello = this.testClient.getHelloUsingPropertyPlaceHolder();
+		Hello hello = testClient.getHelloUsingPropertyPlaceHolder();
 		assertThat(hello).as("hello was null").isNotNull();
 		assertThat(hello).as("first hello didn't match").isEqualTo(new Hello(OI_TERRA_2));
 	}
 
 	@Test
 	public void testSimpleType() {
-		Hello hello = this.testClient.getHello();
+		Hello hello = testClient.getHello();
 		assertThat(hello).as("hello was null").isNotNull();
 		assertThat(hello).as("first hello didn't match")
 				.isEqualTo(new Hello(HELLO_WORLD_1));
@@ -202,20 +203,20 @@ public class FeignClientTests {
 
 	@Test
 	public void testOptional() {
-		Optional<Hello> hello = this.testClient.getOptionalHello();
+		Optional<Hello> hello = testClient.getOptionalHello();
 		assertThat(hello).isNotNull().isPresent().contains(new Hello(HELLO_WORLD_1));
 	}
 
 	@Test
 	public void testGenericType() {
-		List<Hello> hellos = this.testClient.getHellos();
+		List<Hello> hellos = testClient.getHellos();
 		assertThat(hellos).as("hellos was null").isNotNull();
 		assertThat(getHelloList()).as("hellos didn't match").isEqualTo(hellos);
 	}
 
 	@Test
 	public void testRequestInterceptors() {
-		List<String> headers = this.testClient.getHelloHeaders();
+		List<String> headers = testClient.getHelloHeaders();
 		assertThat(headers).as("headers was null").isNotNull();
 		assertThat(headers.contains("myheader1value"))
 				.as("headers didn't contain myheader1value").isTrue();
@@ -225,24 +226,23 @@ public class FeignClientTests {
 
 	@Test
 	public void testHeaderPlaceholders() {
-		String header = this.testClient.getHelloHeadersPlaceholders();
+		String header = testClient.getHelloHeadersPlaceholders();
 		assertThat(header).as("header was null").isNotNull();
 		assertThat(header).as("header was wrong").isEqualTo("myPlaceholderHeaderValue");
 	}
 
 	@Test
-	public void testFeignClientType() throws IllegalAccessException {
+	public void testFeignClientType() {
-		assertThat(this.feignClient).isInstanceOf(LoadBalancerFeignClient.class);
+		assertThat(feignClient).isInstanceOf(LoadBalancerFeignClient.class);
-		LoadBalancerFeignClient client = (LoadBalancerFeignClient) this.feignClient;
+		LoadBalancerFeignClient client = (LoadBalancerFeignClient) feignClient;
 		Client delegate = client.getDelegate();
 		assertThat(delegate).isInstanceOf(Client.Default.class);
 	}
 
 	@Test
 	public void testServiceId() {
-		assertThat(this.testClientServiceId).as("testClientServiceId was null")
+		assertThat(testClientServiceId).as("testClientServiceId was null").isNotNull();
-				.isNotNull();
+		final Hello hello = testClientServiceId.getHello();
-		final Hello hello = this.testClientServiceId.getHello();
 		assertThat(hello).as("The hello response was null").isNotNull();
 		assertThat(hello).as("first hello didn't match")
 				.isEqualTo(new Hello(HELLO_WORLD_1));
@@ -251,7 +251,7 @@ public class FeignClientTests {
 	@Test
 	public void testParams() {
 		List<String> list = Arrays.asList("a", "1", "test");
-		List<String> params = this.testClient.getParams(list);
+		List<String> params = testClient.getParams(list);
 		assertThat(params).as("params was null").isNotNull();
 		assertThat(params.size()).as("params size was wrong").isEqualTo(list.size());
 	}
@@ -260,14 +260,14 @@ public class FeignClientTests {
 	public void testFormattedParams() {
 		List<LocalDate> list = Arrays.asList(LocalDate.of(2001, 1, 1),
 				LocalDate.of(2018, 6, 10));
-		List<LocalDate> params = this.testClient.getFormattedParams(list);
+		List<LocalDate> params = testClient.getFormattedParams(list);
 		assertThat(params).as("params was null").isNotNull();
 		assertThat(params).as("params not converted correctly").isEqualTo(list);
 	}
 
 	@Test
 	public void testHystrixCommand() throws NoSuchMethodException {
-		HystrixCommand<List<Hello>> command = this.testClient.getHellosHystrix();
+		HystrixCommand<List<Hello>> command = testClient.getHellosHystrix();
 		assertThat(command).as("command was null").isNotNull();
 		assertThat(command.getCommandGroup().name()).as(
 				"Hystrix command group name should match the name of the feign client")
@@ -284,7 +284,7 @@ public class FeignClientTests {
 
 	@Test
 	public void testSingle() {
-		Single<Hello> single = this.testClient.getHelloSingle();
+		Single<Hello> single = testClient.getHelloSingle();
 		assertThat(single).as("single was null").isNotNull();
 		Hello hello = single.toBlocking().value();
 		assertThat(hello).as("hello was null").isNotNull();
@@ -294,7 +294,7 @@ public class FeignClientTests {
 
 	@Test
 	public void testNoContentResponse() {
-		ResponseEntity<Void> response = this.testClient.noContent();
+		ResponseEntity<Void> response = testClient.noContent();
 		assertThat(response).as("response was null").isNotNull();
 		assertThat(response.getStatusCode()).as("status code was wrong")
 				.isEqualTo(HttpStatus.NO_CONTENT);
@@ -302,7 +302,7 @@ public class FeignClientTests {
 
 	@Test
 	public void testHeadResponse() {
-		ResponseEntity<Void> response = this.testClient.head();
+		ResponseEntity<Void> response = testClient.head();
 		assertThat(response).as("response was null").isNotNull();
 		assertThat(response.getStatusCode()).as("status code was wrong")
 				.isEqualTo(HttpStatus.OK);
@@ -310,7 +310,7 @@ public class FeignClientTests {
 
 	@Test
 	public void testHttpEntity() {
-		HttpEntity<Hello> entity = this.testClient.getHelloEntity();
+		HttpEntity<Hello> entity = testClient.getHelloEntity();
 		assertThat(entity).as("entity was null").isNotNull();
 		Hello hello = entity.getBody();
 		assertThat(hello).as("hello was null").isNotNull();
@@ -320,7 +320,7 @@ public class FeignClientTests {
 
 	@Test
 	public void testMoreComplexHeader() {
-		String response = this.testClient.moreComplexContentType("{\"value\":\"OK\"}");
+		String response = testClient.moreComplexContentType("{\"value\":\"OK\"}");
 		assertThat(response).as("response was null").isNotNull();
 		assertThat(response).as("didn't respond with {\"value\":\"OK\"}")
 				.isEqualTo("{\"value\":\"OK\"}");
@@ -328,7 +328,7 @@ public class FeignClientTests {
 
 	@Test
 	public void testDecodeNotFound() {
-		ResponseEntity<String> response = this.decodingTestClient.notFound();
+		ResponseEntity<String> response = decodingTestClient.notFound();
 		assertThat(response).as("response was null").isNotNull();
 		assertThat(response.getStatusCode()).as("status code was wrong")
 				.isEqualTo(HttpStatus.NOT_FOUND);
@@ -337,35 +337,35 @@ public class FeignClientTests {
 
 	@Test
 	public void testOptionalNotFound() {
-		Optional<String> s = this.decodingTestClient.optional();
+		Optional<String> s = decodingTestClient.optional();
 		assertThat(s).isNotPresent();
 	}
 
 	@Test
 	public void testConvertingExpander() {
-		assertThat(this.testClient.getToString(Arg.A)).isEqualTo(Arg.A.toString());
+		assertThat(testClient.getToString(Arg.A)).isEqualTo(Arg.A.toString());
-		assertThat(this.testClient.getToString(Arg.B)).isEqualTo(Arg.B.toString());
+		assertThat(testClient.getToString(Arg.B)).isEqualTo(Arg.B.toString());
 
-		assertThat(this.testClient.getToString(new OtherArg("foo"))).isEqualTo("bar");
+		assertThat(testClient.getToString(new OtherArg("foo"))).isEqualTo("bar");
 		List<OtherArg> args = new ArrayList<>();
 		args.add(new OtherArg("foo"));
 		args.add(new OtherArg("goo"));
 		List<String> expectedResult = new ArrayList<>();
 		expectedResult.add("bar");
 		expectedResult.add("goo");
-		assertThat(this.testClient.getToString(args)).isEqualTo(expectedResult);
+		assertThat(testClient.getToString(args)).isEqualTo(expectedResult);
 	}
 
 	@Test
 	public void testHystrixFallbackWorks() {
-		Hello hello = this.hystrixClient.fail();
+		Hello hello = hystrixClient.fail();
 		assertThat(hello).as("hello was null").isNotNull();
 		assertThat(hello.getMessage()).as("message was wrong").isEqualTo("fallback");
 	}
 
 	@Test
 	public void testHystrixFallbackSingle() {
-		Single<Hello> single = this.hystrixClient.failSingle();
+		Single<Hello> single = hystrixClient.failSingle();
 		assertThat(single).as("single was null").isNotNull();
 		Hello hello = single.toBlocking().value();
 		assertThat(hello).as("hello was null").isNotNull();
@@ -375,7 +375,7 @@ public class FeignClientTests {
 
 	@Test
 	public void testHystrixFallbackCommand() {
-		HystrixCommand<Hello> command = this.hystrixClient.failCommand();
+		HystrixCommand<Hello> command = hystrixClient.failCommand();
 		assertThat(command).as("command was null").isNotNull();
 		Hello hello = command.execute();
 		assertThat(hello).as("hello was null").isNotNull();
@@ -385,7 +385,7 @@ public class FeignClientTests {
 
 	@Test
 	public void testHystrixFallbackObservable() {
-		Observable<Hello> observable = this.hystrixClient.failObservable();
+		Observable<Hello> observable = hystrixClient.failObservable();
 		assertThat(observable).as("observable was null").isNotNull();
 		Hello hello = observable.toBlocking().first();
 		assertThat(hello).as("hello was null").isNotNull();
@@ -395,7 +395,7 @@ public class FeignClientTests {
 
 	@Test
 	public void testHystrixFallbackFuture() throws Exception {
-		Future<Hello> future = this.hystrixClient.failFuture();
+		Future<Hello> future = hystrixClient.failFuture();
 		assertThat(future).as("future was null").isNotNull();
 		Hello hello = future.get(1, TimeUnit.SECONDS);
 		assertThat(hello).as("hello was null").isNotNull();
@@ -405,7 +405,7 @@ public class FeignClientTests {
 
 	@Test
 	public void testHystrixClientWithFallBackFactory() throws Exception {
-		Hello hello = this.hystrixClientWithFallBackFactory.fail();
+		Hello hello = hystrixClientWithFallBackFactory.fail();
 		assertThat(hello).as("hello was null").isNotNull();
 		assertThat(hello.getMessage()).as("hello#message was null").isNotNull();
 		assertThat(hello.getMessage().contains("500")).as(
@@ -415,22 +415,29 @@ public class FeignClientTests {
 
 	@Test(expected = HystrixRuntimeException.class)
 	public void testInvalidTypeHystrixFallbackFactory() throws Exception {
-		this.invalidTypeHystrixClientWithFallBackFactory.fail();
+		invalidTypeHystrixClientWithFallBackFactory.fail();
 	}
 
 	@Test(expected = HystrixRuntimeException.class)
 	public void testNullHystrixFallbackFactory() throws Exception {
-		this.nullHystrixClientWithFallBackFactory.fail();
+		nullHystrixClientWithFallBackFactory.fail();
+	}
+
+	@Test
+	public void testFormURLEncoded() {
+		Hello hello = new Hello(HELLO_WORLD_1);
+		Hello response = testClient.postFormUrlEncoded(hello);
+		assertThat(response).isEqualTo(hello);
 	}
 
 	@Test
 	public void namedFeignClientWorks() {
-		assertThat(this.namedHystrixClient).as("namedHystrixClient was null").isNotNull();
+		assertThat(namedHystrixClient).as("namedHystrixClient was null").isNotNull();
 	}
 
 	@Test
 	public void testHystrixSetterFactory() {
-		HystrixCommand<List<Hello>> command = this.hystrixSetterFactoryClient
+		HystrixCommand<List<Hello>> command = hystrixSetterFactoryClient
 				.getHellosHystrix();
 		assertThat(command).as("command was null").isNotNull();
 		String setterPrefix = TestHystrixSetterFactoryClientConfig.SETTER_PREFIX;
@@ -449,13 +456,13 @@ public class FeignClientTests {
 
 	@Test
 	public void testSingleRequestPart() {
-		String response = this.multipartClient.singlePart("abc");
+		String response = multipartClient.singlePart("abc");
 		assertThat(response).isEqualTo("abc");
 	}
 
 	@Test
 	public void testSinglePojoRequestPart() {
-		String response = this.multipartClient.singlePojoPart(new Hello(HELLO_WORLD_1));
+		String response = multipartClient.singlePojoPart(new Hello(HELLO_WORLD_1));
 		assertThat(response).isEqualTo(HELLO_WORLD_1);
 	}
 
@@ -463,7 +470,7 @@ public class FeignClientTests {
 	public void testMultipleRequestParts() {
 		MockMultipartFile file = new MockMultipartFile("file", "hello.bin", null,
 				"hello".getBytes());
-		String response = this.multipartClient.multipart("abc", "123", file);
+		String response = multipartClient.multipart("abc", "123", file);
 		assertThat(response).isEqualTo("abc123hello.bin");
 	}
 
@@ -473,8 +480,7 @@ public class FeignClientTests {
 		Hello pojo2 = new Hello(OI_TERRA_2);
 		MockMultipartFile file = new MockMultipartFile("file", "hello.bin", null,
 				"hello".getBytes());
-		String response = this.multipartClient.multipartPojo("abc", "123", pojo1, pojo2,
+		String response = multipartClient.multipartPojo("abc", "123", pojo1, pojo2, file);
-				file);
 		assertThat(response).isEqualTo("abc123hello world 1oi terra 2hello.bin");
 	}
 
@@ -483,10 +489,10 @@ public class FeignClientTests {
 		List<MultipartFile> multipartFiles = Arrays.asList(
 				new MockMultipartFile("file1", "hello1.bin", null, "hello".getBytes()),
 				new MockMultipartFile("file2", "hello2.bin", null, "hello".getBytes()));
-		String partNames = this.multipartClient
+		String partNames = multipartClient
 				.requestPartListOfMultipartFilesReturnsPartNames(multipartFiles);
 		assertThat(partNames).isEqualTo("files,files");
-		String fileNames = this.multipartClient
+		String fileNames = multipartClient
 				.requestPartListOfMultipartFilesReturnsFileNames(multipartFiles);
 		assertThat(fileNames).contains("hello1.bin", "hello2.bin");
 	}
@@ -499,9 +505,8 @@ public class FeignClientTests {
 				"hello".getBytes());
 		MockMultipartFile file2 = new MockMultipartFile("file2", "hello2.bin", null,
 				"hello".getBytes());
-		String response = this.multipartClient
+		String response = multipartClient.requestPartListOfPojosAndListOfMultipartFiles(
-				.requestPartListOfPojosAndListOfMultipartFiles(
+				Arrays.asList(pojo1, pojo2), Arrays.asList(file1, file2));
-						Arrays.asList(pojo1, pojo2), Arrays.asList(file1, file2));
 		assertThat(response).isEqualTo("hello world 1oi terra 2hello1.binhello2.bin");
 	}
 
@@ -510,7 +515,7 @@ public class FeignClientTests {
 		String partName = UUID.randomUUID().toString();
 		MockMultipartFile file1 = new MockMultipartFile(partName, "hello1.bin", null,
 				"hello".getBytes());
-		String response = this.multipartClient.requestBodySingleMultipartFile(file1);
+		String response = multipartClient.requestBodySingleMultipartFile(file1);
 		assertThat(response).isEqualTo(partName);
 	}
 
@@ -520,7 +525,7 @@ public class FeignClientTests {
 				"hello".getBytes());
 		MockMultipartFile file2 = new MockMultipartFile("file2", "hello2.bin", null,
 				"hello".getBytes());
-		String response = this.multipartClient
+		String response = multipartClient
 				.requestBodyListOfMultipartFiles(Arrays.asList(file1, file2));
 		assertThat(response).contains("file1", "file2");
 	}
@@ -535,7 +540,7 @@ public class FeignClientTests {
 		form.put("file1", file1);
 		form.put("file2", file2);
 		form.put("hello", "world");
-		String response = this.multipartClient.requestBodyMap(form);
+		String response = multipartClient.requestBodyMap(form);
 		assertThat(response).contains("file1", "file2", "hello");
 	}
 
@@ -544,7 +549,7 @@ public class FeignClientTests {
 		MockMultipartFile file = new MockMultipartFile("file1", "hello1.bin", null,
 				"hello".getBytes());
 		expected.expectCause(instanceOf(EncodeException.class));
-		this.multipartClient.invalid(file);
+		multipartClient.invalid(file);
 	}
 
 	protected enum Arg {
@@ -615,6 +620,10 @@ public class FeignClientTests {
 		@RequestMapping(method = RequestMethod.GET, path = "/tostring")
 		String getToString(@RequestParam("arg") Arg arg);
 
+		@PostMapping(path = "/form-urlencoded",
+				consumes = APPLICATION_FORM_URLENCODED_VALUE)
+		Hello postFormUrlEncoded(Hello hello);
+
 		@RequestMapping(method = RequestMethod.GET, path = "/tostring2")
 		String getToString(@RequestParam("arg") OtherArg arg);
 
@@ -776,7 +785,7 @@ public class FeignClientTests {
 
 		@Override
 		public String toString() {
-			return this.value;
+			return value;
 		}
 
 	}
@@ -810,13 +819,9 @@ public class FeignClientTests {
 
 		@Override
 		public HystrixClientWithFallBackFactory create(final Throwable cause) {
-			return new HystrixClientWithFallBackFactory() {
+			return () -> {
-				@Override
+				assertThat(cause).isNotNull().as("Cause was null");
-				public Hello fail() {
+				return new Hello("Hello from the fallback side: " + cause.getMessage());
-					assertThat(cause).isNotNull().as("Cause was null");
-					return new Hello(
-							"Hello from the fallback side: " + cause.getMessage());
-				}
 			};
 		}
 
@@ -876,18 +881,15 @@ public class FeignClientTests {
 
 		@Bean
 		public SetterFactory commandKeyIsRequestLineSetterFactory() {
-			return new SetterFactory() {
+			return (target, method) -> {
-				@Override
+				String groupKey = SETTER_PREFIX + target.name();
-				public HystrixCommand.Setter create(Target<?> target, Method method) {
+				RequestMapping requestMapping = method
-					String groupKey = SETTER_PREFIX + target.name();
+						.getAnnotation(RequestMapping.class);
-					RequestMapping requestMapping = method
+				String commandKey = SETTER_PREFIX + requestMapping.method()[0] + " "
-							.getAnnotation(RequestMapping.class);
+						+ requestMapping.path()[0];
-					String commandKey = SETTER_PREFIX + requestMapping.method()[0] + " "
+				return HystrixCommand.Setter
-							+ requestMapping.path()[0];
+						.withGroupKey(HystrixCommandGroupKey.Factory.asKey(groupKey))
-					return HystrixCommand.Setter
+						.andCommandKey(HystrixCommandKey.Factory.asKey(commandKey));
-							.withGroupKey(HystrixCommandGroupKey.Factory.asKey(groupKey))
-							.andCommandKey(HystrixCommandKey.Factory.asKey(commandKey));
-				}
 			};
 		}
 
@@ -1154,6 +1156,12 @@ public class FeignClientTests {
 			return result.toString();
 		}
 
+		@PostMapping(path = "/form-urlencoded",
+				consumes = APPLICATION_FORM_URLENCODED_VALUE)
+		Hello postFormUrlEncoded(Hello hello) {
+			return hello;
+		}
+
 	}
 
 	public static class Hello {
@@ -1168,7 +1176,7 @@ public class FeignClientTests {
 		}
 
 		public String getMessage() {
-			return this.message;
+			return message;
 		}
 
 		public void setMessage(String message) {
@@ -1184,12 +1192,12 @@ public class FeignClientTests {
 				return false;
 			}
 			Hello that = (Hello) o;
-			return Objects.equals(this.message, that.message);
+			return Objects.equals(message, that.message);
 		}
 
 		@Override
 		public int hashCode() {
-			return Objects.hash(this.message);
+			return Objects.hash(message);
 		}
 
 	}
@@ -1213,7 +1221,7 @@ public class FeignClientTests {
 
 		@Bean
 		public ServerList<Server> ribbonServerList() {
-			return new StaticServerList<>(new Server("localhost", this.port));
+			return new StaticServerList<>(new Server("localhost", port));
 		}
 
 	}

spring-cloud-openfeign-core/src/test/resources/feign-properties.properties

@@ -10,6 +10,10 @@ feign.client.config.default.retryer=org.springframework.cloud.openfeign.FeignCli
 feign.client.config.default.decode404=true
 feign.client.config.foo.requestInterceptors[0]=org.springframework.cloud.openfeign.FeignClientUsingPropertiesTests.FooRequestInterceptor
 feign.client.config.foo.requestInterceptors[1]=org.springframework.cloud.openfeign.FeignClientUsingPropertiesTests.BarRequestInterceptor
+feign.client.config.singleValue.defaultRequestHeaders[singleValueHeaders]=header
+feign.client.config.singleValue.defaultQueryParameters[singleValueParameters]=parameter
+feign.client.config.multipleValue.defaultRequestHeaders[multipleValueHeaders]=header1,header2
+feign.client.config.multipleValue.defaultQueryParameters[multipleValueParameters]=parameter1,parameter2
 feign.client.config.bar.connectTimeout=1000
 feign.client.config.bar.readTimeout=1000
 feign.client.config.form.encoder=org.springframework.cloud.openfeign.FeignClientUsingPropertiesTests.FormEncoder
@@ -18,3 +22,4 @@ feign.client.config.unwrap.readTimeout=1000
 feign.client.config.unwrap.exceptionPropagationPolicy=unwrap
 feign.client.config.readTimeout.readTimeout=1000
 feign.client.config.connectTimeout.connectTimeout=1000
+feign.client.config.default.followRedirects=false