Bumping versions

I found a typo in the latest release.
It should be `@FeignClient(url = "http://localhost:8080")`

.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 +1,33 @@
+# 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: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        java: ["17"]
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up JDK ${{ matrix.java }}
+        uses: actions/setup-java@v2
+        with:
+          distribution: 'zulu'
+          java-version: ${{ matrix.java }}
+          cache: 'maven'
+      - name: Build with Maven
+        run: ./mvnw clean install -B -U -P sonar
+      - uses: codecov/codecov-action@v1
+        with:
+          fail_ci_if_error: true

.gitignore

@@ -20,5 +20,4 @@ _site/
 *.swo
 .vscode/
 .flattened-pom.xml
-.sdkmanrc
 

.sdkmanrc

@@ -0,0 +1,3 @@
+# Enable auto-env through the sdkman_auto_env config
+# Add key=value pairs of SDKs to use below
+java=17.0.1-tem

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=main&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"]
 
@@ -40,7 +40,8 @@ and binding to the Spring Environment and other Spring programming model idioms.
 
 == Building
 
-:jdkversion: 1.8
+
+:jdkversion: 17
 
 === Basic Compile and Test
 
@@ -66,23 +67,9 @@ 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
-is one. There should be a "script" and maybe "install" command. Also
-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 (i.e. Redis) for testing generally
+require that a local instance of [Docker](https://www.docker.com/get-started) is installed and running.
 
-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
 
@@ -316,3 +303,58 @@ 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.
+
+=== Duplicate Finder
+
+Spring Cloud Build brings along the  `basepom:duplicate-finder-maven-plugin`, that enables flagging duplicate and conflicting classes and resources on the java classpath.
+
+==== Duplicate Finder configuration
+
+Duplicate finder is *enabled by default* and will run in the `verify` phase of your Maven build, but it will only take effect in your project if you add the `duplicate-finder-maven-plugin` to the `build` section of the projecst's `pom.xml`.
+
+.pom.xml
+[source,xml]
+----
+<build>
+    <plugins>
+        <plugin>
+            <groupId>org.basepom.maven</groupId>
+            <artifactId>duplicate-finder-maven-plugin</artifactId>
+        </plugin>
+    </plugins>
+</build>
+----
+
+For other properties, we have set defaults as listed in the https://github.com/basepom/duplicate-finder-maven-plugin/wiki[plugin documentation].
+
+You can easily override them but setting the value of the selected property prefixed with `duplicate-finder-maven-plugin`. For example, set `duplicate-finder-maven-plugin.skip` to `true` in order to skip duplicates check in your build.
+
+If you need to add `ignoredClassPatterns` or `ignoredResourcePatterns` to your setup, make sure to add them in the plugin configuration section of your project:
+
+[source,xml]
+----
+<build>
+    <plugins>
+        <plugin>
+            <groupId>org.basepom.maven</groupId>
+            <artifactId>duplicate-finder-maven-plugin</artifactId>
+            <configuration>
+                <ignoredClassPatterns>
+                    <ignoredClassPattern>org.joda.time.base.BaseDateTime</ignoredClassPattern>
+                    <ignoredClassPattern>.*module-info</ignoredClassPattern>
+                </ignoredClassPatterns>
+                <ignoredResourcePatterns>
+                    <ignoredResourcePattern>changelog.txt</ignoredResourcePattern>
+                </ignoredResourcePatterns>
+            </configuration>
+        </plugin>
+    </plugins>
+</build>
+
+
+----
+
+
+== 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>3.0.0</version>
+		<version>4.0.0-SNAPSHOT</version>
 	</parent>
 	<artifactId>spring-cloud-openfeign-docs</artifactId>
 	<packaging>jar</packaging>
@@ -17,6 +17,8 @@
 		<main.basedir>${basedir}/..</main.basedir>
 		<configprops.inclusionPattern>feign.*</configprops.inclusionPattern>
 		<upload-docs-zip.phase>deploy</upload-docs-zip.phase>
+		<!-- Don't upload docs jar to central / repo.spring.io -->
+		<maven-deploy-plugin-default.phase>none</maven-deploy-plugin-default.phase>
 	</properties>
 	<dependencies>
 		<dependency>

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=main&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/_configprops.adoc

@@ -1,25 +1,37 @@
 |===
 |Name | Default | Description
 
-|feign.circuitbreaker.enabled | `false` | If true, an OpenFeign client will be wrapped with a Spring Cloud CircuitBreaker circuit breaker.
-|feign.client.config |  | 
-|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-config | `default` | 
-|feign.client.default-to-properties | `true` | 
-|feign.compression.request.enabled | `false` | Enables the request sent by Feign to be compressed.
-|feign.compression.request.mime-types | `[text/xml, application/xml, application/json]` | The list of supported mime types.
-|feign.compression.request.min-request-size | `2048` | The minimum threshold content size.
-|feign.compression.response.enabled | `false` | Enables the response from Feign to be compressed.
-|feign.compression.response.useGzipDecoder | `false` | Enables the default gzip decoder to be used.
-|feign.httpclient.connection-timeout | `2000` | 
-|feign.httpclient.connection-timer-repeat | `3000` | 
-|feign.httpclient.disable-ssl-validation | `false` | 
-|feign.httpclient.enabled | `true` | Enables the use of the Apache HTTP Client by Feign.
-|feign.httpclient.follow-redirects | `true` | 
-|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.okhttp.enabled | `false` | Enables the use of the OK HTTP Client by Feign.
+|spring.cloud.openfeign.autoconfiguration.jackson.enabled | `false` | If true, PageJacksonModule and SortJacksonModule bean will be provided for Jackson page decoding.
+|spring.cloud.openfeign.circuitbreaker.enabled | `false` | If true, an OpenFeign client will be wrapped with a Spring Cloud CircuitBreaker circuit breaker.
+|spring.cloud.openfeign.circuitbreaker.group.enabled | `false` | If true, an OpenFeign client will be wrapped with a Spring Cloud CircuitBreaker circuit breaker with with group.
+|spring.cloud.openfeign.client.config |  | 
+|spring.cloud.openfeign.client.decode-slash | `true` | Feign clients do not encode slash `/` characters by default. To change this behavior, set the `decodeSlash` to `false`.
+|spring.cloud.openfeign.client.default-config | `default` | 
+|spring.cloud.openfeign.client.default-to-properties | `true` | 
+|spring.cloud.openfeign.client.refresh-enabled | `false` | Enables options value refresh capability for Feign.
+|spring.cloud.openfeign.compression.request.enabled | `false` | Enables the request sent by Feign to be compressed.
+|spring.cloud.openfeign.compression.request.mime-types | `[text/xml, application/xml, application/json]` | The list of supported mime types.
+|spring.cloud.openfeign.compression.request.min-request-size | `2048` | The minimum threshold content size.
+|spring.cloud.openfeign.compression.response.enabled | `false` | Enables the response from Feign to be compressed.
+|spring.cloud.openfeign.encoder.charset-from-content-type | `false` | Indicates whether the charset should be derived from the {@code Content-Type} header.
+|spring.cloud.openfeign.httpclient.connection-timeout | `2000` | 
+|spring.cloud.openfeign.httpclient.connection-timer-repeat | `3000` | 
+|spring.cloud.openfeign.httpclient.disable-ssl-validation | `false` | 
+|spring.cloud.openfeign.httpclient.enabled | `true` | Enables the use of the Apache HTTP Client by Feign.
+|spring.cloud.openfeign.httpclient.follow-redirects | `true` | 
+|spring.cloud.openfeign.httpclient.hc5.enabled | `false` | Enables the use of the Apache HTTP Client 5 by Feign.
+|spring.cloud.openfeign.httpclient.hc5.pool-concurrency-policy |  | Pool concurrency policies.
+|spring.cloud.openfeign.httpclient.hc5.pool-reuse-policy |  | Pool connection re-use policies.
+|spring.cloud.openfeign.httpclient.hc5.socket-timeout | `5` | Default value for socket timeout.
+|spring.cloud.openfeign.httpclient.hc5.socket-timeout-unit |  | Default value for socket timeout unit.
+|spring.cloud.openfeign.httpclient.max-connections | `200` | 
+|spring.cloud.openfeign.httpclient.max-connections-per-route | `50` | 
+|spring.cloud.openfeign.httpclient.ok-http.read-timeout | `60s` | {@link OkHttpClient} read timeout; defaults to 60 seconds.
+|spring.cloud.openfeign.httpclient.time-to-live | `900` | 
+|spring.cloud.openfeign.httpclient.time-to-live-unit |  | 
+|spring.cloud.openfeign.metrics.enabled | `true` | Enables metrics capability for Feign.
+|spring.cloud.openfeign.oauth2.enabled | `false` | Enables feign interceptor for managing oauth2 access token.
+|spring.cloud.openfeign.oauth2.load-balanced | `false` | Enables load balancing for oauth2 access token provider.
+|spring.cloud.openfeign.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 [[ "${CURRENT_BRANCH}" == "master" ]] ; then
-        echo -e "Current branch is master - will copy the current docs only to the root folder"
+    if [[ "${CURRENT_BRANCH}" == "main" ]] ; then
+        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

docs/src/main/asciidoc/index.adoc

@@ -1 +0,0 @@
-spring-cloud-openfeign.adoc

docs/src/main/asciidoc/index.adoc

@@ -0,0 +1 @@
+include::spring-cloud-openfeign.adoc[]

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 Eureka, as well as Spring Cloud LoadBalancer to provide a load-balanced http client when using Feign.
+Spring Cloud integrates 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
@@ -32,9 +32,9 @@ Example spring boot app
 @EnableFeignClients
 public class Application {
 
-    public static void main(String[] args) {
-        SpringApplication.run(Application.class, args);
-    }
+	public static void main(String[] args) {
+		SpringApplication.run(Application.class, args);
+	}
 
 }
 ----
@@ -44,32 +44,40 @@ public class Application {
 ----
 @FeignClient("stores")
 public interface StoreClient {
-    @RequestMapping(method = RequestMethod.GET, value = "/stores")
-    List<Store> getStores();
+	@RequestMapping(method = RequestMethod.GET, value = "/stores")
+	List<Store> getStores();
 
-    @RequestMapping(method = RequestMethod.GET, value = "/stores")
-    Page<Store> getStores(Pageable pageable);
+	@RequestMapping(method = RequestMethod.GET, value = "/stores")
+	Page<Store> getStores(Pageable pageable);
 
-    @RequestMapping(method = RequestMethod.POST, value = "/stores/{storeId}", consumes = "application/json")
-    Store update(@PathVariable("storeId") Long storeId, Store store);
+	@RequestMapping(method = RequestMethod.POST, value = "/stores/{storeId}", consumes = "application/json")
+	Store update(@PathVariable("storeId") Long storeId, Store store);
+
+	@RequestMapping(method = RequestMethod.DELETE, value = "/stores/{storeId:\\d+}")
+	void delete(@PathVariable Long storeId);
 }
 ----
 
-In the `@FeignClient` annotation the String value ("stores" above) is an arbitrary client name, which is used to create a https://github.com/spring-cloud/spring-cloud-commons/blob/master/spring-cloud-loadbalancer/src/main/java/org/springframework/cloud/loadbalancer/blocking/client/BlockingLoadBalancerClient.java[Spring Cloud LoadBalancer client].
+In the `@FeignClient` annotation the String value ("stores" above) is an arbitrary client name, which is used to create a https://github.com/spring-cloud/spring-cloud-commons/blob/main/spring-cloud-loadbalancer/src/main/java/org/springframework/cloud/loadbalancer/blocking/client/BlockingLoadBalancerClient.java[Spring Cloud LoadBalancer client].
 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
 for the "stores" service. If your application is a Eureka client then
 it will resolve the service in the Eureka service registry. If you
-don't want to use Eureka, you can simply configure a list of servers
-in your external configuration using https://cloud.spring.io/spring-cloud-static/spring-cloud-commons/current/reference/html/#simplediscoveryclient[`SimpleDiscoveryClient`].
+don't want to use Eureka, you can configure a list of servers
+in your external configuration using https://docs.spring.io/spring-cloud-commons/docs/current/reference/html/#simplediscoveryclient[`SimpleDiscoveryClient`].
 
 Spring Cloud OpenFeign supports all the features available for the blocking mode of Spring Cloud LoadBalancer. You can read more about them in the https://docs.spring.io/spring-cloud-commons/docs/current/reference/html/#spring-cloud-loadbalancer[project documentation].
 
+TIP: To use `@EnableFeignClients` annotation on `@Configuration`-annotated-classes, make sure to specify where the clients are located, for example:
+`@EnableFeignClients(basePackages = "com.example.clients")`
+or list them explicitly:
+`@EnableFeignClients(clients = InventoryServiceFeignClient.class)`
+
 [[spring-cloud-feign-overriding-defaults]]
 === Overriding Feign Defaults
 
@@ -84,7 +92,7 @@ Spring Cloud lets you take full control of the feign client by declaring additio
 ----
 @FeignClient(name = "stores", configuration = FooConfiguration.class)
 public interface StoreClient {
-    //..
+	//..
 }
 ----
 
@@ -104,7 +112,7 @@ Placeholders are supported in the `name` and `url` attributes.
 ----
 @FeignClient(name = "${feign.name}", url = "${feign.url}")
 public interface StoreClient {
-    //..
+	//..
 }
 ----
 
@@ -113,15 +121,17 @@ Spring Cloud OpenFeign provides the following beans by default for feign (`BeanT
 * `Decoder` feignDecoder: `ResponseEntityDecoder` (which wraps a `SpringDecoder`)
 * `Encoder` feignEncoder: `SpringEncoder`
 * `Logger` feignLogger: `Slf4jLogger`
+* `MicrometerCapability` micrometerCapability: If `feign-micrometer` is on the classpath and `MeterRegistry` is available
+* `CachingCapability` cachingCapability: If `@EnableCaching` annotation is used. Can be disabled via `spring.cloud.openfeign.cache.enabled`.
 * `Contract` feignContract: `SpringMvcContract`
 * `Feign.Builder` feignBuilder: `FeignCircuitBreaker.Builder`
-* `Client` feignClient: 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.
+* `Client` feignClient: If Spring Cloud LoadBalancer is on the classpath, `FeignBlockingLoadBalancerClient` is used.
+If none of them is on the classpath, the default feign client is used.
 
 NOTE: `spring-cloud-starter-openfeign` supports `spring-cloud-starter-loadbalancer`. However, as is an optional dependency, you need to make sure it been added to your project if you want to use it.
 
-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.
-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.
+The OkHttpClient and ApacheHttpClient and ApacheHC5 feign clients can be used by setting `spring.cloud.openfeign.okhttp.enabled` or `spring.cloud.openfeign.httpclient.enabled` or `spring.cloud.openfeign.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 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:
 
@@ -132,6 +142,7 @@ Spring Cloud OpenFeign _does not_ provide the following beans by default for fei
 * `Collection<RequestInterceptor>`
 * `SetterFactory`
 * `QueryMapEncoder`
+* `Capability` (`MicrometerCapability` and `CachingCapability` are provided by default)
 
 A bean of `Retryer.NEVER_RETRY` with the type `Retryer` is created by default, which will disable retrying.
 Notice this retrying behavior is different from the Feign default one, where it will automatically retry IOExceptions,
@@ -143,15 +154,15 @@ Creating a bean of one of those type and placing it in a `@FeignClient` configur
 ----
 @Configuration
 public class FooConfiguration {
-    @Bean
-    public Contract feignContract() {
-        return new feign.Contract.Default();
-    }
+	@Bean
+	public Contract feignContract() {
+		return new feign.Contract.Default();
+	}
 
-    @Bean
-    public BasicAuthRequestInterceptor basicAuthRequestInterceptor() {
-        return new BasicAuthRequestInterceptor("user", "password");
-    }
+	@Bean
+	public BasicAuthRequestInterceptor basicAuthRequestInterceptor() {
+		return new BasicAuthRequestInterceptor("user", "password");
+	}
 }
 ----
 
@@ -162,49 +173,58 @@ This replaces the `SpringMvcContract` with `feign.Contract.Default` and adds a `
 application.yml
 [source,yaml]
 ----
-feign:
-  client:
-    config:
-      feignName:
-        connectTimeout: 5000
-        readTimeout: 5000
-        loggerLevel: full
-        errorDecoder: com.example.SimpleErrorDecoder
-        retryer: com.example.SimpleRetryer
-       defaultQueryParameters:
-          query: queryValue
-        defaultRequestHeaders:
-          header: headerValue
-        requestInterceptors:
-          - com.example.FooRequestInterceptor
-          - com.example.BarRequestInterceptor
-        decode404: false
-        encoder: com.example.SimpleEncoder
-        decoder: com.example.SimpleDecoder
-        contract: com.example.SimpleContract
+spring:
+	cloud:
+		openfeign:
+			client:
+				config:
+					feignName:
+						connectTimeout: 5000
+						readTimeout: 5000
+						loggerLevel: full
+						errorDecoder: com.example.SimpleErrorDecoder
+						retryer: com.example.SimpleRetryer
+						defaultQueryParameters:
+							query: queryValue
+						defaultRequestHeaders:
+							header: headerValue
+						requestInterceptors:
+							- com.example.FooRequestInterceptor
+							- com.example.BarRequestInterceptor
+						decode404: false
+						encoder: com.example.SimpleEncoder
+						decoder: com.example.SimpleDecoder
+						contract: com.example.SimpleContract
+						capabilities:
+							- com.example.FooCapability
+							- com.example.BarCapability
+						queryMapEncoder: com.example.SimpleQueryMapEncoder
+						metrics.enabled: false
 ----
 
 Default configurations can be specified in the `@EnableFeignClients` attribute `defaultConfiguration` in a similar manner as described above. The difference is that this configuration will apply to _all_ feign clients.
 
-If you prefer using configuration properties to configured all `@FeignClient`, you can create configuration properties with `default` feign name.
+If you prefer using configuration properties to configure 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`.
+You can use `spring.cloud.openfeign.client.config.feignName.defaultQueryParameters` and `spring.cloud.openfeign.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]
 ----
-feign:
-  client:
-    config:
-      default:
-        connectTimeout: 5000
-        readTimeout: 5000
-        loggerLevel: basic
+spring:
+	cloud:
+		openfeign:
+			client:
+				config:
+					default:
+						connectTimeout: 5000
+						readTimeout: 5000
+						loggerLevel: basic
 ----
 
 If we create both `@Configuration` bean and configuration properties, configuration properties will win.
 It will override `@Configuration` values. But if you want to change the priority to `@Configuration`,
-you can change `feign.client.default-to-properties` to `false`.
+you can change `spring.cloud.openfeign.client.default-to-properties` to `false`.
 
 If we want to create multiple feign clients with the same name or url
 so that they would point to the same server but each with a different custom configuration then
@@ -215,7 +235,7 @@ collision of these configuration beans.
 ----
 @FeignClient(contextId = "fooClient", name = "stores", configuration = FooConfiguration.class)
 public interface FooClient {
-    //..
+	//..
 }
 ----
 
@@ -223,7 +243,7 @@ public interface FooClient {
 ----
 @FeignClient(contextId = "barClient", name = "stores", configuration = BarConfiguration.class)
 public interface BarClient {
-    //..
+	//..
 }
 ----
 
@@ -250,7 +270,13 @@ 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`.
+TIP: By default, Feign clients do not encode slash `/` characters. You can change this behaviour, by setting the value of `spring.cloud.openfeign.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 `spring.cloud.openfeign.encoder.charset-from-content-type` to `true`.
 
 [[timeout-handling]]
 === Timeout Handling
@@ -279,12 +305,13 @@ class FooController {
 
 	private FooClient adminClient;
 
-    	@Autowired
-	public FooController(Decoder decoder, Encoder encoder, Client client, Contract contract) {
+	@Autowired
+	public FooController(Client client, Encoder encoder, Decoder decoder, Contract contract, MicrometerCapability micrometerCapability) {
 		this.fooClient = Feign.builder().client(client)
 				.encoder(encoder)
 				.decoder(decoder)
 				.contract(contract)
+				.addCapability(micrometerCapability)
 				.requestInterceptor(new BasicAuthRequestInterceptor("user", "user"))
 				.target(FooClient.class, "https://PROD-SVC");
 
@@ -292,9 +319,10 @@ class FooController {
 				.encoder(encoder)
 				.decoder(decoder)
 				.contract(contract)
+				.addCapability(micrometerCapability)
 				.requestInterceptor(new BasicAuthRequestInterceptor("admin", "admin"))
 				.target(FooClient.class, "https://PROD-SVC");
-    }
+	}
 }
 ----
 
@@ -313,7 +341,7 @@ You can do this by overriding calling `inheritParentContext(false)` on the `Buil
 [[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.
+If Spring Cloud CircuitBreaker is on the classpath and `spring.cloud.openfeign.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.:
 
@@ -321,7 +349,7 @@ To disable Spring Cloud CircuitBreaker support on a per-client basis create a va
 ----
 @Configuration
 public class FooConfiguration {
-    	@Bean
+	@Bean
 	@Scope("prototype")
 	public Feign.Builder feignBuilder() {
 		return Feign.builder();
@@ -329,23 +357,138 @@ public class FooConfiguration {
 }
 ----
 
-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`.
+The circuit breaker name follows this pattern `<feignClientClassName>#<calledMethod>(<parameterTypes>)`. When calling a `@FeignClient` with `FooClient` interface and the called interface method that has no parameters is `bar` then the circuit breaker name will be `FooClient#bar()`.
+
+NOTE: As of 2020.0.2, the circuit breaker name pattern has changed from `<feignClientName>_<calledMethod>`.
+Using `CircuitBreakerNameResolver` introduced in 2020.0.4, circuit breaker names can retain the old pattern.
+
+Providing a bean of `CircuitBreakerNameResolver`, you can change the circuit breaker name pattern.
+[source,java,indent=0]
+----
+@Configuration
+public class FooConfiguration {
+	@Bean
+	public CircuitBreakerNameResolver circuitBreakerNameResolver() {
+		return (String feignClientName, Target<?> target, Method method) -> feignClientName + "_" + method.getName();
+	}
+}
+----
+
+To enable Spring Cloud CircuitBreaker group set the `spring.cloud.openfeign.circuitbreaker.group.enabled` property to `true` (by default `false`).
+
+[[spring-clou-feign-circuitbreaker-configurationproperties]]
+=== Configuring CircuitBreakers With Configuration Properties
+
+You can configure CircuitBreakers via configuration properties.
+
+For example, if you had this Feign client
+
+[source,java,indent=0]
+----
+@FeignClient(url = "http://localhost:8080")
+public interface DemoClient {
+
+    @GetMapping("demo")
+    String getDemo();
+}
+----
+
+You could configure it using configuration properties by doing the following
+
+[source,yaml,indent=0]
+----
+feign:
+  circuitbreaker:
+    enabled: true
+    alphanumeric-ids:
+      enabled: true
+resilience4j:
+  circuitbreaker:
+    instances:
+      DemoClientgetDemo:
+        minimumNumberOfCalls: 69
+  timelimiter:
+    instances:
+      DemoClientgetDemo:
+        timeoutDuration: 10s
+----
+
+NOTE: If you want to switch back to the circuit breaker names used prior to Spring Cloud
+2022.0.0 you can set `spring.cloud.openfeign.circuitbreaker.alphanumeric-ids.enabled` to `false`.
 
 [[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 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.
+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/CirciutBreakerTests.java[tags=client_with_fallback, indent=0]
+@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";
+		}
+
+	}
 ----
 
 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/CirciutBreakerTests.java[tags=client_with_fallback_factory, indent=0]
+@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";
+		}
+
+	}
 ----
 
 === Feign and `@Primary`
@@ -371,8 +514,8 @@ This allows grouping common operations into convenient base interfaces.
 ----
 public interface UserService {
 
-    @RequestMapping(method = RequestMethod.GET, value ="/users/{id}")
-    User getUser(@PathVariable("id") long id);
+	@RequestMapping(method = RequestMethod.GET, value ="/users/{id}")
+	User getUser(@PathVariable("id") long id);
 }
 ----
 
@@ -396,10 +539,7 @@ public interface UserClient extends UserService {
 }
 ----
 
-NOTE: It is generally not advisable to share an interface between a
-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).
+WARNING: `@FeignClient` interfaces should not be shared between server and client and annotating `@FeignClient` interfaces with `@RequestMapping` on class level is no longer supported.
 
 === Feign request/response compression
 
@@ -408,29 +548,21 @@ Feign requests. You can do this by enabling one of the properties:
 
 [source,java]
 ----
-feign.compression.request.enabled=true
-feign.compression.response.enabled=true
+spring.cloud.openfeign.compression.request.enabled=true
+spring.cloud.openfeign.compression.response.enabled=true
 ----
 
 Feign request compression gives you settings similar to what you may set for your web server:
 
 [source,java]
 ----
-feign.compression.request.enabled=true
-feign.compression.request.mime-types=text/xml,application/xml,application/json
-feign.compression.request.min-request-size=2048
+spring.cloud.openfeign.compression.request.enabled=true
+spring.cloud.openfeign.compression.request.mime-types=text/xml,application/xml,application/json
+spring.cloud.openfeign.compression.request.min-request-size=2048
 ----
 
 These properties allow you to be selective about the compressed media types and minimum request threshold length.
 
-For http clients except OkHttpClient, default gzip decoder can be enabled to decode gzip response in UTF-8 encoding:
-
-[source,java]
-----
-feign.compression.response.enabled=true
-feign.compression.response.useGzipDecoder=true
-----
-
 === Feign logging
 
 A logger is created for each Feign client created. By default the name of the logger is the full class name of the interface used to create the Feign client. Feign logging only responds to the `DEBUG` level.
@@ -455,13 +587,82 @@ For example, the following would set the `Logger.Level` to `FULL`:
 ----
 @Configuration
 public class FooConfiguration {
-    @Bean
-    Logger.Level feignLoggerLevel() {
-        return Logger.Level.FULL;
-    }
+	@Bean
+	Logger.Level feignLoggerLevel() {
+		return Logger.Level.FULL;
+	}
 }
 ----
 
+=== Feign Capability support
+
+The Feign capabilities expose core Feign components so that these components can be modified. For example, the capabilities can take the `Client`, _decorate_ it, and give the decorated instance back to Feign.
+The support for metrics libraries is a good real-life example for this. See <<feign-metrics>>.
+
+Creating one or more `Capability` beans and placing them in a `@FeignClient` configuration lets you register them and modify the behavior of the involved client.
+
+[source,java,indent=0]
+----
+@Configuration
+public class FooConfiguration {
+	@Bean
+	Capability customCapability() {
+		return new CustomCapability();
+	}
+}
+----
+
+=== Feign metrics
+
+If all of the following conditions are true, a `MicrometerCapability` bean is created and registered so that your Feign client publishes metrics to Micrometer:
+
+* `feign-micrometer` is on the classpath
+* A `MeterRegistry` bean is available
+* feign metrics properties are set to `true` (by default)
+	- `spring.cloud.openfeign.metrics.enabled=true` (for all clients)
+	- `spring.cloud.openfeign.client.config.feignName.metrics.enabled=true` (for a single client)
+
+NOTE: If your application already uses Micrometer, enabling metrics is as simple as putting `feign-micrometer` onto your classpath.
+
+You can also disable the feature by either:
+
+* excluding `feign-micrometer` from your classpath
+* setting one of the feign metrics properties to `false`
+	- `spring.cloud.openfeign.metrics.enabled=false`
+	- `spring.cloud.openfeign.client.config.feignName.metrics.enabled=false`
+
+NOTE: `spring.cloud.openfeign.metrics.enabled=false` disables metrics support for *all* Feign clients regardless of the value of the client-level flags: `spring.cloud.openfeign.client.config.feignName.metrics.enabled`.
+If you want to enable or disable merics per client, don't set `spring.cloud.openfeign.metrics.enabled` and use `spring.cloud.openfeign.client.config.feignName.metrics.enabled`.
+
+You can also customize the `MicrometerCapability` by registering your own bean:
+
+[source,java,indent=0]
+----
+@Configuration
+public class FooConfiguration {
+	@Bean
+	public MicrometerCapability micrometerCapability(MeterRegistry meterRegistry) {
+		return new MicrometerCapability(meterRegistry);
+	}
+}
+----
+
+=== Feign Caching
+
+If `@EnableCaching` annotation is used, a `CachingCapability` bean is created and registered so that your Feign client recognizes `@Cache*` annotations on its interface:
+
+[source,java,indent=0]
+----
+public interface DemoClient {
+
+	@GetMapping("/demo/{filterParam}")
+    @Cacheable(cacheNames = "demo-cache", key = "#keyParam")
+	String demoEndpoint(String keyParam, @PathVariable String filterParam);
+}
+----
+
+You can also disable the feature via property `spring.cloud.openfeign.cache.enabled=false`.
+
 === Feign @QueryMap support
 
 The OpenFeign `@QueryMap` annotation provides support for POJOs to be used as
@@ -477,10 +678,10 @@ For example, the `Params` class defines parameters `param1` and `param2`:
 ----
 // Params.java
 public class Params {
-    private String param1;
-    private String param2;
+	private String param1;
+	private String param2;
 
-    // [Getters and setters omitted for brevity]
+	// [Getters and setters omitted for brevity]
 }
 ----
 
@@ -491,8 +692,8 @@ The following feign client uses the `Params` class by using the `@SpringQueryMap
 @FeignClient("demo")
 public interface DemoTemplate {
 
-    @GetMapping(path = "/demo")
-    String demoEndpoint(@SpringQueryMap Params params);
+	@GetMapping(path = "/demo")
+	String demoEndpoint(@SpringQueryMap Params params);
 }
 ----
 
@@ -513,8 +714,8 @@ and deserialize HATEOAS representation models: https://docs.spring.io/spring-hat
 @FeignClient("demo")
 public interface DemoTemplate {
 
-    @GetMapping(path = "/stores")
-    CollectionModel<Store> getStores();
+	@GetMapping(path = "/stores")
+	CollectionModel<Store> getStores();
 }
 ----
 
@@ -543,32 +744,33 @@ Note that both variable name and the path segment placeholder are called `matrix
 @FeignClient("demo")
 public interface DemoTemplate {
 
-    @GetMapping(path = "/stores")
-    CollectionModel<Store> getStores();
+	@GetMapping(path = "/stores")
+	CollectionModel<Store> getStores();
 }
 ----
 
 === Feign `CollectionFormat` support
-We support `feign.CollectionFormat` by providing the `@CollectionFormat` annotation. You can annotate a Feign client method with it by passing the desired `feign.CollectionFormat` as annotation value.
+We support `feign.CollectionFormat` by providing the `@CollectionFormat` annotation.
+You can annotate a Feign client method (or the whole class to affect all methods) with it by passing the desired `feign.CollectionFormat` as annotation value.
 
 In the following example, the `CSV` format is used instead of the default `EXPLODED` to process the method.
 
 [source,java,indent=0]
 ----
 @FeignClient(name = "demo")
-	protected interface PageableFeignClient {
+protected interface PageableFeignClient {
 
-		@CollectionFormat(feign.CollectionFormat.CSV)
-		@GetMapping(path = "/page")
-		ResponseEntity performRequest(Pageable page);
+    @CollectionFormat(feign.CollectionFormat.CSV)
+    @GetMapping(path = "/page")
+    ResponseEntity performRequest(Pageable page);
 
-	}
+}
 ----
 
 TIP: Set the `CSV` format while sending `Pageable` as a query parameter in order for it to be encoded correctly.
 
 === Reactive Support
-As the https://github.com/OpenFeign/feign[OpenFeign project] does not currently support reactive clients, such as https://docs.spring.io/spring/docs/current/javadoc-api/org/springframework/web/reactive/function/client/WebClient.html[Spring WebClient], neither does Spring Cloud OpenFeign. We will add support for it here as soon as it becomes available in the core project.
+As the https://github.com/OpenFeign/feign[OpenFeign project] does not currently support reactive clients, such as https://docs.spring.io/spring/docs/current/javadoc-api/org/springframework/web/reactive/function/client/WebClient.html[Spring WebClient], neither does Spring Cloud OpenFeign.We will add support for it here as soon as it becomes available in the core project.
 
 Until that is done, we recommend using https://github.com/Playtika/feign-reactive[feign-reactive] for Spring WebClient support.
 
@@ -580,9 +782,66 @@ To work around this problem you can use an `ObjectProvider` when autowiring your
 [source,java,indent=0]
 ----
 @Autowired
-ObjectProvider<TestFeginClient> testFeginClient;
+ObjectProvider<TestFeignClient> testFeignClient;
 ----
 
+=== 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]
+----
+spring.cloud.openfeign.autoconfiguration.jackson.enabled=true
+----
+
+=== Spring `@RefreshScope` Support
+If Feign client refresh is enabled, each feign client is created with `feign.Request.Options` as a refresh-scoped bean. This means properties such as `connectTimeout` and `readTimeout` can be refreshed against any Feign client instance through `POST /actuator/refresh`.
+
+By default, refresh behavior in Feign clients is disabled. Use the following property to enable refresh behavior:
+[source,java]
+----
+spring.cloud.openfeign.client.refresh-enabled=true
+----
+TIP: DO NOT annotate the `@FeignClient` interface with the `@RefreshScope` annotation.
+
+=== OAuth2 Support
+OAuth2 support can be enabled by setting following flag:
+----
+spring.cloud.openfeign.oauth2.enabled=true
+----
+When the flag is set to true, and the oauth2 client context resource details are present, a bean of class `OAuth2FeignRequestInterceptor` is created. Before each request, the interceptor resolves the required access token and includes it as a header.
+Sometimes, when load balancing is enabled for Feign clients, you may want to use load balancing for fetching access tokens, too. To do so, you should ensure that the load balancer is on the classpath (spring-cloud-starter-loadbalancer) and explicitly enable load balancing for OAuth2FeignRequestInterceptor by setting the following flag:
+----
+spring.cloud.openfeign.oauth2.load-balanced=true
+----
+
+=== Transform the load-balanced HTTP request
+
+You can use the selected `ServiceInstance` to transform the load-balanced HTTP Request.
+
+For `Request`, you need to implement and define `LoadBalancerFeignRequestTransformer`, as follows:
+
+[source,java,indent=0]
+----
+	@Bean
+	public LoadBalancerFeignRequestTransformer transformer() {
+		return new LoadBalancerFeignRequestTransformer() {
+
+			@Override
+			public Request transformRequest(Request request, ServiceInstance instance) {
+				Map<String, Collection<String>> headers = new HashMap<>(request.headers());
+				headers.put("X-ServiceId", Collections.singletonList(instance.getServiceId()));
+				headers.put("X-InstanceId", Collections.singletonList(instance.getInstanceId()));
+				return Request.create(request.httpMethod(), request.url(), headers, request.body(), request.charset(),
+						request.requestTemplate());
+			}
+		};
+	}
+----
+
+If multiple transformers are defined, they are applied in the order in which beans are defined.
+Alternatively, you can use `LoadBalancerFeignRequestTransformer.DEFAULT_ORDER` to specify the order.
+
 == 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>3.0.0</version>
+	<version>4.0.0-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>3.0.0</version>
+		<version>4.0.0-SNAPSHOT</version>
 		<relativePath/>
 	</parent>
 	<scm>
@@ -26,7 +26,7 @@
 	<properties>
 		<main.basedir>${basedir}</main.basedir>
 		<jackson.version>2.11.3</jackson.version>
-		<spring-cloud-commons.version>3.0.0</spring-cloud-commons.version>
+		<spring-cloud-commons.version>4.0.0-SNAPSHOT</spring-cloud-commons.version>
 
 		<!-- Plugin versions -->
 		<maven-eclipse-plugin.version>2.10</maven-eclipse-plugin.version>
@@ -64,13 +64,6 @@
 					</additionalConfig>
 				</configuration>
 			</plugin>
-			<plugin>
-				<artifactId>maven-compiler-plugin</artifactId>
-				<configuration>
-					<source>1.8</source>
-					<target>1.8</target>
-				</configuration>
-			</plugin>
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-checkstyle-plugin</artifactId>
@@ -79,6 +72,15 @@
 				<groupId>io.spring.javaformat</groupId>
 				<artifactId>spring-javaformat-maven-plugin</artifactId>
 			</plugin>
+			<plugin>
+				<groupId>org.basepom.maven</groupId>
+				<artifactId>duplicate-finder-maven-plugin</artifactId>
+				<configuration>
+					<ignoredResourcePatterns>
+						<ignoredResourcePattern>mozilla/public-suffix-list.txt</ignoredResourcePattern>
+					</ignoredResourcePatterns>
+				</configuration>
+			</plugin>
 		</plugins>
 	</build>
 
@@ -133,7 +135,7 @@
 				<repository>
 					<id>spring-snapshots</id>
 					<name>Spring Snapshots</name>
-					<url>https://repo.spring.io/libs-snapshot-local</url>
+					<url>https://repo.spring.io/snapshot</url>
 					<snapshots>
 						<enabled>true</enabled>
 					</snapshots>
@@ -144,7 +146,7 @@
 				<repository>
 					<id>spring-milestones</id>
 					<name>Spring Milestones</name>
-					<url>https://repo.spring.io/libs-milestone-local</url>
+					<url>https://repo.spring.io/milestone</url>
 					<snapshots>
 						<enabled>false</enabled>
 					</snapshots>
@@ -162,7 +164,7 @@
 				<pluginRepository>
 					<id>spring-snapshots</id>
 					<name>Spring Snapshots</name>
-					<url>https://repo.spring.io/libs-snapshot-local</url>
+					<url>https://repo.spring.io/snapshot</url>
 					<snapshots>
 						<enabled>true</enabled>
 					</snapshots>
@@ -173,7 +175,7 @@
 				<pluginRepository>
 					<id>spring-milestones</id>
 					<name>Spring Milestones</name>
-					<url>https://repo.spring.io/libs-milestone-local</url>
+					<url>https://repo.spring.io/milestone</url>
 					<snapshots>
 						<enabled>false</enabled>
 					</snapshots>
@@ -181,7 +183,7 @@
 				<pluginRepository>
 					<id>spring-releases</id>
 					<name>Spring Releases</name>
-					<url>https://repo.spring.io/libs-release-local</url>
+					<url>https://repo.spring.io/release</url>
 					<snapshots>
 						<enabled>false</enabled>
 					</snapshots>

spring-cloud-openfeign-core/pom.xml

@@ -6,7 +6,7 @@
 	<parent>
 		<groupId>org.springframework.cloud</groupId>
 		<artifactId>spring-cloud-openfeign</artifactId>
-		<version>3.0.0</version>
+		<version>4.0.0-SNAPSHOT</version>
 		<relativePath>..</relativePath> <!-- lookup parent from repository -->
 	</parent>
 	<artifactId>spring-cloud-openfeign-core</artifactId>
@@ -61,15 +61,16 @@
 			<artifactId>reactor-core</artifactId>
 			<optional>true</optional>
 		</dependency>
-		<dependency>
-			<groupId>io.reactivex</groupId>
-			<artifactId>rxjava-reactive-streams</artifactId>
-			<optional>true</optional>
-		</dependency>
 		<dependency>
 			<groupId>org.springframework.retry</groupId>
 			<artifactId>spring-retry</artifactId>
 			<optional>true</optional>
+			<exclusions>
+				<exclusion>
+					<groupId>javax.annotation</groupId>
+					<artifactId>javax.annotation-api</artifactId>
+				</exclusion>
+			</exclusions>
 		</dependency>
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
@@ -93,12 +94,24 @@
 		<dependency>
 			<groupId>io.github.openfeign.form</groupId>
 			<artifactId>feign-form-spring</artifactId>
+			<exclusions>
+<!--				Vulnerable in 3.8.0-->
+				<exclusion>
+					<groupId>commons-io</groupId>
+					<artifactId>commons-io</artifactId>
+				</exclusion>
+			</exclusions>
 		</dependency>
 		<dependency>
 			<groupId>io.github.openfeign</groupId>
 			<artifactId>feign-slf4j</artifactId>
 			<optional>true</optional>
 		</dependency>
+		<dependency>
+			<groupId>io.github.openfeign</groupId>
+			<artifactId>feign-micrometer</artifactId>
+			<optional>true</optional>
+		</dependency>
 		<dependency>
 			<groupId>io.github.openfeign</groupId>
 			<artifactId>feign-httpclient</artifactId>
@@ -106,12 +119,12 @@
 		</dependency>
 		<dependency>
 			<groupId>io.github.openfeign</groupId>
-			<artifactId>feign-okhttp</artifactId>
+			<artifactId>feign-hc5</artifactId>
 			<optional>true</optional>
 		</dependency>
 		<dependency>
-			<groupId>io.reactivex</groupId>
-			<artifactId>rxjava</artifactId>
+			<groupId>io.github.openfeign</groupId>
+			<artifactId>feign-okhttp</artifactId>
 			<optional>true</optional>
 		</dependency>
 		<dependency>
@@ -123,6 +136,20 @@
 			<groupId>org.springframework.security.oauth.boot</groupId>
 			<artifactId>spring-security-oauth2-autoconfigure</artifactId>
 			<optional>true</optional>
+			<exclusions>
+				<exclusion>
+					<groupId>javax.xml.bind</groupId>
+					<artifactId>jaxb-api</artifactId>
+				</exclusion>
+				<exclusion>
+					<groupId>javax.activation</groupId>
+					<artifactId>javax.activation-api</artifactId>
+				</exclusion>
+				<exclusion>
+					<groupId>com.sun.activation</groupId>
+					<artifactId>jakarta.activation</artifactId>
+				</exclusion>
+			</exclusions>
 		</dependency>
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
@@ -139,11 +166,6 @@
 			<artifactId>spring-boot-starter-test</artifactId>
 			<scope>test</scope>
 		</dependency>
-		<dependency>
-			<groupId>org.junit.vintage</groupId>
-			<artifactId>junit-vintage-engine</artifactId>
-			<scope>test</scope>
-		</dependency>
 		<dependency>
 			<groupId>org.springframework.cloud</groupId>
 			<artifactId>spring-cloud-test-support</artifactId>
@@ -173,13 +195,13 @@
 		<dependency>
 			<groupId>com.google.protobuf</groupId>
 			<artifactId>protobuf-java</artifactId>
-			<version>3.14.0</version>
+			<version>3.19.3</version>
 			<scope>test</scope>
 		</dependency>
 		<dependency>
 			<groupId>io.vavr</groupId>
 			<artifactId>vavr</artifactId>
-			<version>0.10.3</version>
+			<version>0.10.4</version>
 			<scope>test</scope>
 		</dependency>
 		<dependency>
@@ -187,6 +209,12 @@
 			<artifactId>spring-cloud-loadbalancer</artifactId>
 			<optional>true</optional>
 		</dependency>
+		<dependency>
+			<groupId>commons-io</groupId>
+			<artifactId>commons-io</artifactId>
+			<version>2.11.0</version>
+			<scope>test</scope>
+		</dependency>
 	</dependencies>
 	<profiles>
 		<profile>

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2022 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.

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

@@ -0,0 +1,42 @@
+/*
+ * Copyright 2013-2022 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.Capability;
+import feign.InvocationHandlerFactory;
+
+import org.springframework.cache.interceptor.CacheInterceptor;
+
+/**
+ * Allows Spring's @Cache* annotations to be declared on the feign client's methods.
+ *
+ * @author Sam Kruglov
+ */
+public class CachingCapability implements Capability {
+
+	private final CacheInterceptor cacheInterceptor;
+
+	public CachingCapability(CacheInterceptor cacheInterceptor) {
+		this.cacheInterceptor = cacheInterceptor;
+	}
+
+	@Override
+	public InvocationHandlerFactory enrich(InvocationHandlerFactory invocationHandlerFactory) {
+		return new FeignCachingInvocationHandlerFactory(invocationHandlerFactory, cacheInterceptor);
+	}
+
+}

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

@@ -0,0 +1,34 @@
+/*
+ * Copyright 2013-2022 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.Method;
+
+import feign.Target;
+
+/**
+ * Used to resolve a circuitbreaker name which will be used in
+ * {@link org.springframework.cloud.client.circuitbreaker.CircuitBreakerFactory}.
+ *
+ * @author Kwangyong Kim
+ * @since 2020.0.4
+ */
+public interface CircuitBreakerNameResolver {
+
+	String resolveCircuitBreakerName(String feignClientName, Target<?> target, Method method);
+
+}

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2022 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.
@@ -25,9 +25,10 @@ import java.lang.annotation.Target;
  * Indicates which collection format should be used while processing the annotated method.
  *
  * @author Olga Maciaszek-Sharma
+ * @author Sam Kruglov
  * @see feign.CollectionFormat
  */
-@Target(ElementType.METHOD)
+@Target({ ElementType.METHOD, ElementType.TYPE })
 @Retention(RetentionPolicy.RUNTIME)
 public @interface CollectionFormat {
 

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-2020 the original author or authors.
+ * Copyright 2016-2022 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.

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2022 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.

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2022 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.

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2022 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.

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 2013-2022 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.
@@ -17,19 +17,24 @@
 package org.springframework.cloud.openfeign;
 
 import java.io.IOException;
+import java.lang.reflect.Method;
+import java.time.Duration;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Timer;
 import java.util.TimerTask;
 import java.util.concurrent.TimeUnit;
 
-import javax.annotation.PreDestroy;
-
+import com.fasterxml.jackson.databind.Module;
+import feign.Capability;
 import feign.Client;
 import feign.Feign;
 import feign.RequestInterceptor;
+import feign.Target;
+import feign.hc5.ApacheHttp5Client;
 import feign.httpclient.ApacheHttpClient;
 import feign.okhttp.OkHttpClient;
+import jakarta.annotation.PreDestroy;
 import okhttp3.ConnectionPool;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
@@ -40,36 +45,56 @@ import org.apache.http.conn.HttpClientConnectionManager;
 import org.apache.http.impl.client.CloseableHttpClient;
 
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Value;
 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.boot.context.properties.EnableConfigurationProperties;
+import org.springframework.cache.interceptor.CacheInterceptor;
 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.client.loadbalancer.LoadBalancerInterceptor;
+import org.springframework.cloud.client.loadbalancer.RetryLoadBalancerInterceptor;
 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.security.OAuth2FeignRequestInterceptor;
-import org.springframework.cloud.openfeign.support.DefaultGzipDecoderConfiguration;
+import org.springframework.cloud.openfeign.security.OAuth2FeignRequestInterceptorConfigurer;
+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;
 import org.springframework.security.oauth2.client.OAuth2ClientContext;
 import org.springframework.security.oauth2.client.resource.OAuth2ProtectedResourceDetails;
 
+import static org.springframework.cloud.openfeign.security.OAuth2FeignRequestInterceptorBuilder.buildWithConfigurers;
+
 /**
  * @author Spencer Gibb
  * @author Julien Roy
+ * @author Grzegorz Poznachowski
+ * @author Nikita Konev
+ * @author Tim Peeters
+ * @author Olga Maciaszek-Sharma
+ * @author Nguyen Ky Thanh
+ * @author Andrii Bohutskyi
+ * @author Kwangyong Kim
+ * @author Sam Kruglov
+ * @author Wojciech Mąka
  */
 @Configuration(proxyBeanMethods = false)
 @ConditionalOnClass(Feign.class)
-@EnableConfigurationProperties({ FeignClientProperties.class, FeignHttpClientProperties.class })
-@Import(DefaultGzipDecoderConfiguration.class)
+@EnableConfigurationProperties({ FeignClientProperties.class, FeignHttpClientProperties.class,
+		FeignEncoderProperties.class })
 public class FeignAutoConfiguration {
 
 	private static final Log LOG = LogFactory.getLog(FeignAutoConfiguration.class);
@@ -89,6 +114,32 @@ public class FeignAutoConfiguration {
 		return context;
 	}
 
+	@Bean
+	@ConditionalOnProperty(value = "spring.cloud.openfeign.cache.enabled", matchIfMissing = true)
+	@ConditionalOnBean(CacheInterceptor.class)
+	public Capability cachingCapability(CacheInterceptor cacheInterceptor) {
+		return new CachingCapability(cacheInterceptor);
+	}
+
+	@Configuration(proxyBeanMethods = false)
+	@ConditionalOnClass({ Module.class, Page.class, Sort.class })
+	@ConditionalOnProperty(value = "spring.cloud.openfeign.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(FeignCircuitBreakerDisabledConditions.class)
 	protected static class DefaultFeignTargeterConfiguration {
@@ -103,7 +154,7 @@ public class FeignAutoConfiguration {
 
 	@Configuration(proxyBeanMethods = false)
 	@ConditionalOnClass(CircuitBreaker.class)
-	@ConditionalOnProperty("feign.circuitbreaker.enabled")
+	@ConditionalOnProperty(value = "spring.cloud.openfeign.circuitbreaker.enabled", havingValue = "true")
 	protected static class CircuitBreakerPresentFeignTargeterConfiguration {
 
 		@Bean
@@ -112,23 +163,61 @@ public class FeignAutoConfiguration {
 			return new DefaultTargeter();
 		}
 
+		@Bean
+		@ConditionalOnMissingBean(CircuitBreakerNameResolver.class)
+		@ConditionalOnProperty(value = "spring.cloud.openfeign.circuitbreaker.alphanumeric-ids.enabled",
+				havingValue = "false")
+		public CircuitBreakerNameResolver circuitBreakerNameResolver() {
+			return new DefaultCircuitBreakerNameResolver();
+		}
+
+		@Bean
+		@ConditionalOnMissingBean(CircuitBreakerNameResolver.class)
+		@ConditionalOnProperty(value = "spring.cloud.openfeign.circuitbreaker.alphanumeric-ids.enabled",
+				havingValue = "true", matchIfMissing = true)
+		public CircuitBreakerNameResolver alphanumericCircuitBreakerNameResolver() {
+			return new AlphanumericCircuitBreakerNameResolver();
+		}
+
 		@Bean
 		@ConditionalOnMissingBean
 		@ConditionalOnBean(CircuitBreakerFactory.class)
-		public Targeter circuitBreakerFeignTargeter(CircuitBreakerFactory circuitBreakerFactory) {
-			return new FeignCircuitBreakerTargeter(circuitBreakerFactory);
+		public Targeter circuitBreakerFeignTargeter(CircuitBreakerFactory circuitBreakerFactory,
+				@Value("${spring.cloud.openfeign.circuitbreaker.group.enabled:false}") boolean circuitBreakerGroupEnabled,
+				CircuitBreakerNameResolver circuitBreakerNameResolver) {
+			return new FeignCircuitBreakerTargeter(circuitBreakerFactory, circuitBreakerGroupEnabled,
+					circuitBreakerNameResolver);
+		}
+
+		static class DefaultCircuitBreakerNameResolver implements CircuitBreakerNameResolver {
+
+			@Override
+			public String resolveCircuitBreakerName(String feignClientName, Target<?> target, Method method) {
+				return Feign.configKey(target.type(), method);
+			}
+
+		}
+
+		static class AlphanumericCircuitBreakerNameResolver extends DefaultCircuitBreakerNameResolver {
+
+			@Override
+			public String resolveCircuitBreakerName(String feignClientName, Target<?> target, Method method) {
+				return super.resolveCircuitBreakerName(feignClientName, target, method).replaceAll("[^a-zA-Z0-9]", "");
+			}
+
 		}
 
 	}
 
 	// the following configuration is for alternate feign clients if
 	// SC loadbalancer is not on the class path.
-	// see corresponding configurations in FeignRibbonClientAutoConfiguration
+	// see corresponding configurations in FeignLoadBalancerAutoConfiguration
 	// for load-balanced clients.
 	@Configuration(proxyBeanMethods = false)
 	@ConditionalOnClass(ApacheHttpClient.class)
 	@ConditionalOnMissingBean(CloseableHttpClient.class)
-	@ConditionalOnProperty(value = "feign.httpclient.enabled", matchIfMissing = true)
+	@ConditionalOnProperty(value = "spring.cloud.openfeign.httpclient.enabled", matchIfMissing = true)
+	@Conditional(HttpClient5DisabledConditions.class)
 	protected static class HttpClientFeignConfiguration {
 
 		private final Timer connectionManagerTimer = new Timer(
@@ -195,7 +284,7 @@ public class FeignAutoConfiguration {
 	@Configuration(proxyBeanMethods = false)
 	@ConditionalOnClass(OkHttpClient.class)
 	@ConditionalOnMissingBean(okhttp3.OkHttpClient.class)
-	@ConditionalOnProperty("feign.okhttp.enabled")
+	@ConditionalOnProperty("spring.cloud.openfeign.okhttp.enabled")
 	protected static class OkHttpFeignConfiguration {
 
 		private okhttp3.OkHttpClient okHttpClient;
@@ -204,8 +293,8 @@ public class FeignAutoConfiguration {
 		@ConditionalOnMissingBean(ConnectionPool.class)
 		public ConnectionPool httpClientConnectionPool(FeignHttpClientProperties httpClientProperties,
 				OkHttpClientConnectionPoolFactory connectionPoolFactory) {
-			Integer maxTotalConnections = httpClientProperties.getMaxConnections();
-			Long timeToLive = httpClientProperties.getTimeToLive();
+			int maxTotalConnections = httpClientProperties.getMaxConnections();
+			long timeToLive = httpClientProperties.getTimeToLive();
 			TimeUnit ttlUnit = httpClientProperties.getTimeToLiveUnit();
 			return connectionPoolFactory.create(maxTotalConnections, timeToLive, ttlUnit);
 		}
@@ -213,12 +302,13 @@ public class FeignAutoConfiguration {
 		@Bean
 		public okhttp3.OkHttpClient client(OkHttpClientFactory httpClientFactory, ConnectionPool connectionPool,
 				FeignHttpClientProperties httpClientProperties) {
-			Boolean followRedirects = httpClientProperties.isFollowRedirects();
-			Integer connectTimeout = httpClientProperties.getConnectionTimeout();
-			Boolean disableSslValidation = httpClientProperties.isDisableSslValidation();
+			boolean followRedirects = httpClientProperties.isFollowRedirects();
+			int connectTimeout = httpClientProperties.getConnectionTimeout();
+			boolean disableSslValidation = httpClientProperties.isDisableSslValidation();
+			Duration readTimeout = httpClientProperties.getOkHttp().getReadTimeout();
 			this.okHttpClient = httpClientFactory.createBuilder(disableSslValidation)
 					.connectTimeout(connectTimeout, TimeUnit.MILLISECONDS).followRedirects(followRedirects)
-					.connectionPool(connectionPool).build();
+					.readTimeout(readTimeout).connectionPool(connectionPool).build();
 			return this.okHttpClient;
 		}
 
@@ -238,17 +328,51 @@ public class FeignAutoConfiguration {
 
 	}
 
+	@Configuration(proxyBeanMethods = false)
+	@ConditionalOnClass(ApacheHttp5Client.class)
+	@ConditionalOnMissingBean(org.apache.hc.client5.http.impl.classic.CloseableHttpClient.class)
+	@ConditionalOnProperty(value = "spring.cloud.openfeign.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);
+		}
+
+	}
+
 	@Configuration(proxyBeanMethods = false)
 	@ConditionalOnClass(OAuth2ClientContext.class)
-	@ConditionalOnProperty("feign.oauth2.enabled")
+	@ConditionalOnProperty("spring.cloud.openfeign.oauth2.enabled")
+	@Deprecated // spring-security-oauth2 reached EOL
 	protected static class Oauth2FeignConfiguration {
 
+		@ConditionalOnBean({ RetryLoadBalancerInterceptor.class, OAuth2ClientContext.class,
+				OAuth2ProtectedResourceDetails.class })
+		@ConditionalOnProperty(value = "spring.cloud.openfeign.oauth2.load-balanced", havingValue = "true")
+		@Bean
+		public OAuth2FeignRequestInterceptorConfigurer retryLoadBalancerInterceptorInjectingConfigurer(
+				final RetryLoadBalancerInterceptor loadBalancerInterceptor) {
+			return builder -> builder.withAccessTokenProviderInterceptors(loadBalancerInterceptor);
+		}
+
+		@ConditionalOnBean({ LoadBalancerInterceptor.class, OAuth2ClientContext.class,
+				OAuth2ProtectedResourceDetails.class })
+		@ConditionalOnProperty(value = "spring.cloud.openfeign.oauth2.load-balanced", havingValue = "true")
+		@Bean
+		public OAuth2FeignRequestInterceptorConfigurer loadBalancerInterceptorInjectingConfigurer(
+				final LoadBalancerInterceptor loadBalancerInterceptor) {
+			return builder -> builder.withAccessTokenProviderInterceptors(loadBalancerInterceptor);
+		}
+
 		@Bean
 		@ConditionalOnMissingBean(OAuth2FeignRequestInterceptor.class)
 		@ConditionalOnBean({ OAuth2ClientContext.class, OAuth2ProtectedResourceDetails.class })
 		public RequestInterceptor oauth2FeignRequestInterceptor(OAuth2ClientContext oAuth2ClientContext,
-				OAuth2ProtectedResourceDetails resource) {
-			return new OAuth2FeignRequestInterceptor(oAuth2ClientContext, resource);
+				OAuth2ProtectedResourceDetails resource, List<OAuth2FeignRequestInterceptorConfigurer> configurers) {
+			return buildWithConfigurers(oAuth2ClientContext, resource, configurers);
 		}
 
 	}

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2022 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.

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

@@ -0,0 +1,82 @@
+/*
+ * Copyright 2013-2022 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.AccessibleObject;
+import java.lang.reflect.InvocationHandler;
+import java.lang.reflect.Method;
+import java.util.Map;
+import java.util.Optional;
+
+import feign.InvocationHandlerFactory;
+import feign.Target;
+import org.aopalliance.intercept.MethodInvocation;
+
+import org.springframework.cache.interceptor.CacheInterceptor;
+
+/**
+ * Allows Spring's @Cache* annotations to be declared on the feign client's methods.
+ *
+ * @author Sam Kruglov
+ */
+public class FeignCachingInvocationHandlerFactory implements InvocationHandlerFactory {
+
+	private final InvocationHandlerFactory delegateFactory;
+
+	private final CacheInterceptor cacheInterceptor;
+
+	public FeignCachingInvocationHandlerFactory(InvocationHandlerFactory delegateFactory,
+			CacheInterceptor cacheInterceptor) {
+		this.delegateFactory = delegateFactory;
+		this.cacheInterceptor = cacheInterceptor;
+	}
+
+	@Override
+	public InvocationHandler create(Target target, Map<Method, MethodHandler> dispatch) {
+		final InvocationHandler delegateHandler = delegateFactory.create(target, dispatch);
+		return (proxy, method, argsNullable) -> {
+			Object[] args = Optional.ofNullable(argsNullable).orElseGet(() -> new Object[0]);
+			return cacheInterceptor.invoke(new MethodInvocation() {
+				@Override
+				public Method getMethod() {
+					return method;
+				}
+
+				@Override
+				public Object[] getArguments() {
+					return args;
+				}
+
+				@Override
+				public Object proceed() throws Throwable {
+					return delegateHandler.invoke(proxy, method, args);
+				}
+
+				@Override
+				public Object getThis() {
+					return target;
+				}
+
+				@Override
+				public AccessibleObject getStaticPart() {
+					return method;
+				}
+			});
+		};
+	}
+
+}

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2022 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.
@@ -16,12 +16,7 @@
 
 package org.springframework.cloud.openfeign;
 
-import java.lang.reflect.InvocationHandler;
-import java.lang.reflect.Method;
-import java.util.Map;
-
 import feign.Feign;
-import feign.InvocationHandlerFactory;
 import feign.Target;
 
 import org.springframework.cloud.client.circuitbreaker.CircuitBreaker;
@@ -31,6 +26,8 @@ import org.springframework.cloud.client.circuitbreaker.CircuitBreakerFactory;
  * Allows Feign interfaces to work with {@link CircuitBreaker}.
  *
  * @author Marcin Grzejszczak
+ * @author Andrii Bohutskyi
+ * @author Kwangyong Kim
  * @since 3.0.0
  */
 public final class FeignCircuitBreaker {
@@ -55,6 +52,10 @@ public final class FeignCircuitBreaker {
 
 		private String feignClientName;
 
+		private boolean circuitBreakerGroupEnabled;
+
+		private CircuitBreakerNameResolver circuitBreakerNameResolver;
+
 		Builder circuitBreakerFactory(CircuitBreakerFactory circuitBreakerFactory) {
 			this.circuitBreakerFactory = circuitBreakerFactory;
 			return this;
@@ -65,6 +66,16 @@ public final class FeignCircuitBreaker {
 			return this;
 		}
 
+		Builder circuitBreakerGroupEnabled(boolean circuitBreakerGroupEnabled) {
+			this.circuitBreakerGroupEnabled = circuitBreakerGroupEnabled;
+			return this;
+		}
+
+		Builder circuitBreakerNameResolver(CircuitBreakerNameResolver circuitBreakerNameResolver) {
+			this.circuitBreakerNameResolver = circuitBreakerNameResolver;
+			return this;
+		}
+
 		public <T> T target(Target<T> target, T fallback) {
 			return build(fallback != null ? new FallbackFactory.Default<T>(fallback) : null).newInstance(target);
 		}
@@ -73,14 +84,15 @@ public final class FeignCircuitBreaker {
 			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(new InvocationHandlerFactory() {
-				@Override
-				public InvocationHandler create(Target target, Map<Method, MethodHandler> dispatch) {
-					return new FeignCircuitBreakerInvocationHandler(circuitBreakerFactory, feignClientName, target,
-							dispatch, nullableFallbackFactory);
-				}
-			});
+			super.invocationHandlerFactory((target, dispatch) -> new FeignCircuitBreakerInvocationHandler(
+					circuitBreakerFactory, feignClientName, target, dispatch, nullableFallbackFactory,
+					circuitBreakerGroupEnabled, circuitBreakerNameResolver));
 			return super.build();
 		}
 

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2022 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.
@@ -31,7 +31,8 @@ class FeignCircuitBreakerDisabledConditions extends AnyNestedCondition {
 
 	}
 
-	@ConditionalOnProperty(value = "feign.circuitbreaker.enabled", havingValue = "false", matchIfMissing = true)
+	@ConditionalOnProperty(value = "spring.cloud.openfeign.circuitbreaker.enabled", havingValue = "false",
+			matchIfMissing = true)
 	static class CircuitBreakerDisabled {
 
 	}

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2022 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;
 
 import java.lang.reflect.InvocationHandler;
+import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
 import java.lang.reflect.Proxy;
 import java.util.LinkedHashMap;
@@ -29,6 +30,9 @@ import feign.Target;
 
 import org.springframework.cloud.client.circuitbreaker.CircuitBreaker;
 import org.springframework.cloud.client.circuitbreaker.CircuitBreakerFactory;
+import org.springframework.cloud.client.circuitbreaker.NoFallbackAvailableException;
+import org.springframework.web.context.request.RequestAttributes;
+import org.springframework.web.context.request.RequestContextHolder;
 
 import static feign.Util.checkNotNull;
 
@@ -46,14 +50,21 @@ class FeignCircuitBreakerInvocationHandler implements InvocationHandler {
 
 	private final Map<Method, Method> fallbackMethodMap;
 
+	private final boolean circuitBreakerGroupEnabled;
+
+	private final CircuitBreakerNameResolver circuitBreakerNameResolver;
+
 	FeignCircuitBreakerInvocationHandler(CircuitBreakerFactory factory, String feignClientName, Target<?> target,
-			Map<Method, InvocationHandlerFactory.MethodHandler> dispatch, FallbackFactory<?> nullableFallbackFactory) {
+			Map<Method, InvocationHandlerFactory.MethodHandler> dispatch, FallbackFactory<?> nullableFallbackFactory,
+			boolean circuitBreakerGroupEnabled, CircuitBreakerNameResolver circuitBreakerNameResolver) {
 		this.factory = factory;
 		this.feignClientName = feignClientName;
 		this.target = checkNotNull(target, "target");
 		this.dispatch = checkNotNull(dispatch, "dispatch");
 		this.fallbackMethodMap = toFallbackMethod(dispatch);
 		this.nullableFallbackFactory = nullableFallbackFactory;
+		this.circuitBreakerGroupEnabled = circuitBreakerGroupEnabled;
+		this.circuitBreakerNameResolver = circuitBreakerNameResolver;
 	}
 
 	@Override
@@ -75,8 +86,10 @@ class FeignCircuitBreakerInvocationHandler implements InvocationHandler {
 		else if ("toString".equals(method.getName())) {
 			return toString();
 		}
-		String circuitName = this.feignClientName + "_" + method.getName();
-		CircuitBreaker circuitBreaker = this.factory.create(circuitName);
+
+		String circuitName = circuitBreakerNameResolver.resolveCircuitBreakerName(feignClientName, target, method);
+		CircuitBreaker circuitBreaker = circuitBreakerGroupEnabled ? factory.create(circuitName, feignClientName)
+				: factory.create(circuitName);
 		Supplier<Object> supplier = asSupplier(method, args);
 		if (this.nullableFallbackFactory != null) {
 			Function<Throwable, Object> fallbackFunction = throwable -> {
@@ -84,19 +97,35 @@ class FeignCircuitBreakerInvocationHandler implements InvocationHandler {
 				try {
 					return this.fallbackMethodMap.get(method).invoke(fallback, args);
 				}
-				catch (Exception e) {
-					throw new IllegalStateException(e);
+				catch (Exception exception) {
+					unwrapAndRethrow(exception);
 				}
+				return null;
 			};
 			return circuitBreaker.run(supplier, fallbackFunction);
 		}
 		return circuitBreaker.run(supplier);
 	}
 
+	private void unwrapAndRethrow(Exception exception) {
+		if (exception instanceof InvocationTargetException || exception instanceof NoFallbackAvailableException) {
+			Throwable underlyingException = exception.getCause();
+			if (underlyingException instanceof RuntimeException) {
+				throw (RuntimeException) underlyingException;
+			}
+			if (underlyingException != null) {
+				throw new IllegalStateException(underlyingException);
+			}
+			throw new IllegalStateException(exception);
+		}
+	}
+
 	private Supplier<Object> asSupplier(final Method method, final Object[] args) {
+		final RequestAttributes requestAttributes = RequestContextHolder.getRequestAttributes();
 		return () -> {
 			try {
-				return this.dispatch.get(method).invoke(args);
+				RequestContextHolder.setRequestAttributes(requestAttributes);
+				return dispatch.get(method).invoke(args);
 			}
 			catch (RuntimeException throwable) {
 				throw throwable;

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2022 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.
@@ -27,8 +27,15 @@ class FeignCircuitBreakerTargeter implements Targeter {
 
 	private final CircuitBreakerFactory circuitBreakerFactory;
 
-	FeignCircuitBreakerTargeter(CircuitBreakerFactory circuitBreakerFactory) {
+	private final boolean circuitBreakerGroupEnabled;
+
+	private final CircuitBreakerNameResolver circuitBreakerNameResolver;
+
+	FeignCircuitBreakerTargeter(CircuitBreakerFactory circuitBreakerFactory, boolean circuitBreakerGroupEnabled,
+			CircuitBreakerNameResolver circuitBreakerNameResolver) {
 		this.circuitBreakerFactory = circuitBreakerFactory;
+		this.circuitBreakerGroupEnabled = circuitBreakerGroupEnabled;
+		this.circuitBreakerNameResolver = circuitBreakerNameResolver;
 	}
 
 	@Override
@@ -81,7 +88,9 @@ class FeignCircuitBreakerTargeter implements Targeter {
 	}
 
 	private FeignCircuitBreaker.Builder builder(String feignClientName, FeignCircuitBreaker.Builder builder) {
-		return builder.circuitBreakerFactory(this.circuitBreakerFactory).feignClientName(feignClientName);
+		return builder.circuitBreakerFactory(circuitBreakerFactory).feignClientName(feignClientName)
+				.circuitBreakerGroupEnabled(circuitBreakerGroupEnabled)
+				.circuitBreakerNameResolver(circuitBreakerNameResolver);
 	}
 
 }

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 2013-2022 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)
@@ -65,9 +66,28 @@ 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).
 	 */

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2022 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 feign.Feign;
+
 import org.springframework.context.ApplicationContext;
 
 /**
@@ -26,6 +28,7 @@ import org.springframework.context.ApplicationContext;
  *
  * @author Sven Döring
  * @author Matt King
+ * @author Sam Kruglov
  */
 public class FeignClientBuilder {
 
@@ -76,6 +79,18 @@ 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 2013-2022 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.
@@ -17,11 +17,13 @@
 package org.springframework.cloud.openfeign;
 
 import java.util.ArrayList;
+import java.util.Collection;
 import java.util.List;
 import java.util.Map;
 import java.util.Objects;
 import java.util.concurrent.TimeUnit;
 
+import feign.Capability;
 import feign.Client;
 import feign.Contract;
 import feign.ExceptionPropagationPolicy;
@@ -35,14 +37,19 @@ 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.context.ApplicationContext;
 import org.springframework.context.ApplicationContextAware;
 import org.springframework.core.annotation.AnnotationAwareOrderComparator;
@@ -57,14 +64,23 @@ import org.springframework.util.StringUtils;
  * @author Matt King
  * @author Olga Maciaszek-Sharma
  * @author Ilia Ilinykh
+ * @author Marcin Grzejszczak
+ * @author Jonatan Ivanov
+ * @author Sam Kruglov
+ * @author Jasbir Singh
+ * @author Hyeonmin Park
+ * @author Felix Dittrich
  */
-public class FeignClientFactoryBean implements FactoryBean<Object>, InitializingBean, ApplicationContextAware {
+public class FeignClientFactoryBean
+		implements FactoryBean<Object>, InitializingBean, 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;
@@ -81,6 +97,8 @@ public class FeignClientFactoryBean implements FactoryBean<Object>, Initializing
 
 	private ApplicationContext applicationContext;
 
+	private BeanFactory beanFactory;
+
 	private Class<?> fallback = void.class;
 
 	private Class<?> fallbackFactory = void.class;
@@ -89,6 +107,12 @@ public class FeignClientFactoryBean implements FactoryBean<Object>, Initializing
 
 	private int connectTimeoutMillis = new Request.Options().connectTimeoutMillis();
 
+	private boolean followRedirects = new Request.Options().isFollowRedirects();
+
+	private boolean refreshableClient = false;
+
+	private final List<FeignBuilderCustomizer> additionalCustomizers = new ArrayList<>();
+
 	@Override
 	public void afterPropertiesSet() {
 		Assert.hasText(contextId, "Context id must be set");
@@ -109,7 +133,6 @@ public class FeignClientFactoryBean implements FactoryBean<Object>, Initializing
 		// @formatter:on
 
 		configureFeign(context, builder);
-		applyBuildCustomizers(context, builder);
 
 		return builder;
 	}
@@ -122,10 +145,12 @@ public class FeignClientFactoryBean implements FactoryBean<Object>, Initializing
 			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.getBean(FeignClientProperties.class);
+		FeignClientProperties properties = beanFactory != null ? beanFactory.getBean(FeignClientProperties.class)
+				: applicationContext.getBean(FeignClientProperties.class);
 
 		FeignClientConfigurer feignClientConfigurer = getOptional(context, FeignClientConfigurer.class);
 		setInheritParentContext(feignClientConfigurer.inheritParentConfiguration());
@@ -168,10 +193,15 @@ public class FeignClientFactoryBean implements FactoryBean<Object>, Initializing
 			}
 		}
 		Request.Options options = getInheritedAwareOptional(context, Request.Options.class);
+		if (options == null) {
+			options = getOptionsByName(context, contextId);
+		}
+
 		if (options != null) {
 			builder.options(options);
 			readTimeoutMillis = options.readTimeoutMillis();
 			connectTimeoutMillis = options.connectTimeoutMillis();
+			followRedirects = options.isFollowRedirects();
 		}
 		Map<String, RequestInterceptor> requestInterceptors = getInheritedAwareInstances(context,
 				RequestInterceptor.class);
@@ -192,6 +222,12 @@ public class FeignClientFactoryBean implements FactoryBean<Object>, Initializing
 		if (exceptionPropagationPolicy != null) {
 			builder.exceptionPropagationPolicy(exceptionPropagationPolicy);
 		}
+
+		Map<String, Capability> capabilities = getInheritedAwareInstances(context, Capability.class);
+		if (capabilities != null) {
+			capabilities.values().stream().sorted(AnnotationAwareOrderComparator.INSTANCE)
+					.forEach(builder::addCapability);
+		}
 	}
 
 	protected void configureUsingProperties(FeignClientProperties.FeignClientConfiguration config,
@@ -204,11 +240,15 @@ public class FeignClientFactoryBean implements FactoryBean<Object>, Initializing
 			builder.logLevel(config.getLoggerLevel());
 		}
 
-		connectTimeoutMillis = config.getConnectTimeout() != null ? config.getConnectTimeout() : connectTimeoutMillis;
-		readTimeoutMillis = config.getReadTimeout() != null ? config.getReadTimeout() : readTimeoutMillis;
+		if (!refreshableClient) {
+			connectTimeoutMillis = config.getConnectTimeout() != null ? 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));
+			builder.options(new Request.Options(connectTimeoutMillis, TimeUnit.MILLISECONDS, readTimeoutMillis,
+					TimeUnit.MILLISECONDS, followRedirects));
+		}
 
 		if (config.getRetryer() != null) {
 			Retryer retryer = getOrInstantiate(config.getRetryer());
@@ -238,13 +278,8 @@ public class FeignClientFactoryBean implements FactoryBean<Object>, Initializing
 			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()));
-		}
+		addDefaultRequestHeaders(config, builder);
+		addDefaultQueryParams(config, builder);
 
 		if (Objects.nonNull(config.getDecoder())) {
 			builder.decoder(getOrInstantiate(config.getDecoder()));
@@ -257,11 +292,48 @@ public class FeignClientFactoryBean implements FactoryBean<Object>, Initializing
 		if (Objects.nonNull(config.getExceptionPropagationPolicy())) {
 			builder.exceptionPropagationPolicy(config.getExceptionPropagationPolicy());
 		}
+
+		if (config.getCapabilities() != null) {
+			config.getCapabilities().stream().map(this::getOrInstantiate).forEach(builder::addCapability);
+		}
+
+		if (config.getQueryMapEncoder() != null) {
+			builder.queryMapEncoder(getOrInstantiate(config.getQueryMapEncoder()));
+		}
+	}
+
+	private void addDefaultQueryParams(FeignClientProperties.FeignClientConfiguration config, Feign.Builder builder) {
+		Map<String, Collection<String>> defaultQueryParameters = config.getDefaultQueryParameters();
+		if (Objects.nonNull(defaultQueryParameters)) {
+			builder.requestInterceptor(requestTemplate -> {
+				Map<String, Collection<String>> queries = requestTemplate.queries();
+				defaultQueryParameters.keySet().forEach(key -> {
+					if (!queries.containsKey(key)) {
+						requestTemplate.query(key, defaultQueryParameters.get(key));
+					}
+				});
+			});
+		}
+	}
+
+	private void addDefaultRequestHeaders(FeignClientProperties.FeignClientConfiguration config,
+			Feign.Builder builder) {
+		Map<String, Collection<String>> defaultRequestHeaders = config.getDefaultRequestHeaders();
+		if (Objects.nonNull(defaultRequestHeaders)) {
+			builder.requestInterceptor(requestTemplate -> {
+				Map<String, Collection<String>> headers = requestTemplate.headers();
+				defaultRequestHeaders.keySet().forEach(key -> {
+					if (!headers.containsKey(key)) {
+						requestTemplate.header(key, defaultRequestHeaders.get(key));
+					}
+				});
+			});
+		}
 	}
 
 	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);
@@ -302,6 +374,7 @@ public class FeignClientFactoryBean implements FactoryBean<Object>, Initializing
 		Client client = getOptional(context, Client.class);
 		if (client != null) {
 			builder.client(client);
+			applyBuildCustomizers(context, builder);
 			Targeter targeter = get(context, Targeter.class);
 			return targeter.target(this, builder, context, target);
 		}
@@ -310,6 +383,20 @@ public class FeignClientFactoryBean implements FactoryBean<Object>, Initializing
 				"No Feign Client for loadBalancing defined. Did you forget to include spring-cloud-starter-loadbalancer?");
 	}
 
+	/**
+	 * Meant to get Options bean from context with bean name.
+	 * @param context context of Feign client
+	 * @param contextId name of feign client
+	 * @return returns Options found in context
+	 */
+	protected Request.Options getOptionsByName(FeignContext context, String contextId) {
+		if (refreshableClient) {
+			return context.getInstance(contextId, Request.Options.class.getCanonicalName() + "-" + contextId,
+					Request.Options.class);
+		}
+		return null;
+	}
+
 	@Override
 	public Object getObject() {
 		return getTarget();
@@ -321,10 +408,15 @@ public class FeignClientFactoryBean implements FactoryBean<Object>, Initializing
 	 * 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;
 			}
@@ -345,13 +437,24 @@ public class FeignClientFactoryBean implements FactoryBean<Object>, Initializing
 				// 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);
 		}
+
+		applyBuildCustomizers(context, builder);
+
 		Targeter targeter = get(context, Targeter.class);
 		return (T) targeter.target(this, builder, context, new HardCodedTarget<>(type, name, url));
 	}
 
 	private String cleanPath() {
+		if (path == null) {
+			return "";
+		}
 		String path = this.path.trim();
 		if (StringUtils.hasLength(path)) {
 			if (!path.startsWith("/")) {
@@ -430,13 +533,18 @@ public class FeignClientFactoryBean implements FactoryBean<Object>, Initializing
 		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() {
@@ -455,6 +563,10 @@ public class FeignClientFactoryBean implements FactoryBean<Object>, Initializing
 		this.fallbackFactory = fallbackFactory;
 	}
 
+	public void setRefreshableClient(boolean refreshableClient) {
+		this.refreshableClient = refreshableClient;
+	}
+
 	@Override
 	public boolean equals(Object o) {
 		if (this == o) {
@@ -464,16 +576,21 @@ public class FeignClientFactoryBean implements FactoryBean<Object>, Initializing
 			return false;
 		}
 		FeignClientFactoryBean that = (FeignClientFactoryBean) o;
-		return Objects.equals(applicationContext, that.applicationContext) && decode404 == that.decode404
+		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(path, that.path) && 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)
+				&& Objects.equals(refreshableClient, that.refreshableClient);
 	}
 
 	@Override
 	public int hashCode() {
-		return Objects.hash(applicationContext, decode404, inheritParentContext, fallback, fallbackFactory, name, path,
-				type, url);
+		return Objects.hash(applicationContext, beanFactory, decode404, inheritParentContext, fallback, fallbackFactory,
+				name, path, type, url, readTimeoutMillis, connectTimeoutMillis, followRedirects, refreshableClient);
 	}
 
 	@Override
@@ -482,8 +599,16 @@ public class FeignClientFactoryBean implements FactoryBean<Object>, Initializing
 				.append(name).append("', ").append("url='").append(url).append("', ").append("path='").append(path)
 				.append("', ").append("decode404=").append(decode404).append(", ").append("inheritParentContext=")
 				.append(inheritParentContext).append(", ").append("applicationContext=").append(applicationContext)
-				.append(", ").append("fallback=").append(fallback).append(", ").append("fallbackFactory=")
-				.append(fallbackFactory).append("}").toString();
+				.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("refreshableClient=").append(refreshableClient).append("}").toString();
+	}
+
+	@Override
+	public void setBeanFactory(BeanFactory beanFactory) throws BeansException {
+		this.beanFactory = beanFactory;
 	}
 
 }

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

@@ -0,0 +1,52 @@
+/*
+ * Copyright 2021-2022 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.util.Map;
+
+import org.springframework.context.annotation.Condition;
+import org.springframework.context.annotation.ConditionContext;
+import org.springframework.core.type.AnnotatedTypeMetadata;
+
+/**
+ * @author Jonatan Ivanov
+ */
+class FeignClientMetricsEnabledCondition implements Condition {
+
+	@Override
+	public boolean matches(ConditionContext context, AnnotatedTypeMetadata metadata) {
+		FeignClientProperties feignClientProperties = context.getBeanFactory()
+				.getBeanProvider(FeignClientProperties.class).getIfAvailable();
+		if (feignClientProperties != null) {
+			Map<String, FeignClientProperties.FeignClientConfiguration> feignClientConfigMap = feignClientProperties
+					.getConfig();
+			if (feignClientConfigMap != null) {
+				FeignClientProperties.FeignClientConfiguration feignClientConfig = feignClientConfigMap
+						.get(context.getEnvironment().getProperty("spring.cloud.openfeign.client.name"));
+				if (feignClientConfig != null) {
+					FeignClientProperties.MetricsProperties metrics = feignClientConfig.getMetrics();
+					if (metrics != null && metrics.getEnabled() != null) {
+						return metrics.getEnabled();
+					}
+				}
+			}
+		}
+
+		return true;
+	}
+
+}

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 2013-2022 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 +22,11 @@ import java.util.List;
 import java.util.Map;
 import java.util.Objects;
 
+import feign.Capability;
 import feign.Contract;
 import feign.ExceptionPropagationPolicy;
 import feign.Logger;
+import feign.QueryMapEncoder;
 import feign.RequestInterceptor;
 import feign.Retryer;
 import feign.codec.Decoder;
@@ -37,8 +39,11 @@ import org.springframework.boot.context.properties.ConfigurationProperties;
  * @author Eko Kurniawan Khannedy
  * @author Ilia Ilinykh
  * @author Ram Anaswara
+ * @author Jonatan Ivanov
+ * @author Olga Maciaszek-Sharma
+ * @author Hyeonmin Park
  */
-@ConfigurationProperties("feign.client")
+@ConfigurationProperties("spring.cloud.openfeign.client")
 public class FeignClientProperties {
 
 	private boolean defaultToProperties = true;
@@ -134,6 +139,14 @@ public class FeignClientProperties {
 
 		private ExceptionPropagationPolicy exceptionPropagationPolicy;
 
+		private List<Class<Capability>> capabilities;
+
+		private Class<QueryMapEncoder> queryMapEncoder;
+
+		private MetricsProperties metrics;
+
+		private Boolean followRedirects;
+
 		public Logger.Level getLoggerLevel() {
 			return loggerLevel;
 		}
@@ -238,6 +251,38 @@ public class FeignClientProperties {
 			this.exceptionPropagationPolicy = exceptionPropagationPolicy;
 		}
 
+		public List<Class<Capability>> getCapabilities() {
+			return capabilities;
+		}
+
+		public void setCapabilities(List<Class<Capability>> capabilities) {
+			this.capabilities = capabilities;
+		}
+
+		public Class<QueryMapEncoder> getQueryMapEncoder() {
+			return queryMapEncoder;
+		}
+
+		public void setQueryMapEncoder(Class<QueryMapEncoder> queryMapEncoder) {
+			this.queryMapEncoder = queryMapEncoder;
+		}
+
+		public MetricsProperties getMetrics() {
+			return metrics;
+		}
+
+		public void setMetrics(MetricsProperties metrics) {
+			this.metrics = metrics;
+		}
+
+		public Boolean isFollowRedirects() {
+			return followRedirects;
+		}
+
+		public void setFollowRedirects(Boolean followRedirects) {
+			this.followRedirects = followRedirects;
+		}
+
 		@Override
 		public boolean equals(Object o) {
 			if (this == o) {
@@ -255,14 +300,52 @@ public class FeignClientProperties {
 					&& Objects.equals(decoder, that.decoder) && Objects.equals(contract, that.contract)
 					&& Objects.equals(exceptionPropagationPolicy, that.exceptionPropagationPolicy)
 					&& Objects.equals(defaultRequestHeaders, that.defaultRequestHeaders)
-					&& Objects.equals(defaultQueryParameters, that.defaultQueryParameters);
+					&& Objects.equals(defaultQueryParameters, that.defaultQueryParameters)
+					&& Objects.equals(capabilities, that.capabilities)
+					&& Objects.equals(queryMapEncoder, that.queryMapEncoder) && Objects.equals(metrics, that.metrics)
+					&& Objects.equals(followRedirects, that.followRedirects);
 		}
 
 		@Override
 		public int hashCode() {
 			return Objects.hash(loggerLevel, connectTimeout, readTimeout, retryer, errorDecoder, requestInterceptors,
 					decode404, encoder, decoder, contract, exceptionPropagationPolicy, defaultQueryParameters,
-					defaultRequestHeaders);
+					defaultRequestHeaders, capabilities, queryMapEncoder, metrics, followRedirects);
+		}
+
+	}
+
+	/**
+	 * Metrics configuration for Feign Client.
+	 */
+	public static class MetricsProperties {
+
+		private Boolean enabled = true;
+
+		public Boolean getEnabled() {
+			return enabled;
+		}
+
+		public void setEnabled(Boolean enabled) {
+			this.enabled = enabled;
+		}
+
+		@Override
+		public boolean equals(Object o) {
+			if (this == o) {
+				return true;
+			}
+			if (o == null || getClass() != o.getClass()) {
+				return false;
+			}
+
+			MetricsProperties that = (MetricsProperties) o;
+			return Objects.equals(enabled, that.enabled);
+		}
+
+		@Override
+		public int hashCode() {
+			return Objects.hash(enabled);
 		}
 
 	}

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2022 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.
@@ -25,7 +25,7 @@ import org.springframework.cloud.context.named.NamedContextFactory;
  * @author Dave Syer
  * @author Gregor Zurowski
  */
-class FeignClientSpecification implements NamedContextFactory.Specification {
+public class FeignClientSpecification implements NamedContextFactory.Specification {
 
 	private String name;
 
@@ -34,7 +34,7 @@ class FeignClientSpecification implements NamedContextFactory.Specification {
 	FeignClientSpecification() {
 	}
 
-	FeignClientSpecification(String name, Class<?>[] configuration) {
+	public FeignClientSpecification(String name, Class<?>[] configuration) {
 		this.name = name;
 		this.configuration = configuration;
 	}

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 2013-2022 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.
@@ -19,16 +19,18 @@ package org.springframework.cloud.openfeign;
 import java.util.ArrayList;
 import java.util.List;
 
-import com.fasterxml.jackson.databind.Module;
 import feign.Contract;
 import feign.Feign;
 import feign.Logger;
+import feign.QueryMapEncoder;
 import feign.Retryer;
 import feign.codec.Decoder;
 import feign.codec.Encoder;
 import feign.form.MultipartFormContentProcessor;
 import feign.form.spring.SpringFormEncoder;
+import feign.micrometer.MicrometerCapability;
 import feign.optionals.OptionalDecoder;
+import io.micrometer.core.instrument.MeterRegistry;
 
 import org.springframework.beans.factory.ObjectFactory;
 import org.springframework.beans.factory.ObjectProvider;
@@ -44,10 +46,11 @@ 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.HttpMessageConverterCustomizer;
 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;
@@ -65,6 +68,10 @@ import static feign.form.ContentType.MULTIPART;
  * @author Dave Syer
  * @author Venil Noronha
  * @author Darren Foong
+ * @author Jonatan Ivanov
+ * @author Olga Maciaszek-Sharma
+ * @author Hyeonmin Park
+ * @author Yanming Zhou
  */
 @Configuration(proxyBeanMethods = false)
 public class FeignClientsConfiguration {
@@ -87,24 +94,30 @@ public class FeignClientsConfiguration {
 	@Autowired(required = false)
 	private FeignClientProperties feignClientProperties;
 
+	@Autowired(required = false)
+	private FeignEncoderProperties encoderProperties;
+
 	@Bean
 	@ConditionalOnMissingBean
-	public Decoder feignDecoder() {
-		return new OptionalDecoder(new ResponseEntityDecoder(new SpringDecoder(this.messageConverters)));
+	public Decoder feignDecoder(ObjectProvider<HttpMessageConverterCustomizer> customizers) {
+		return new OptionalDecoder(new ResponseEntityDecoder(new SpringDecoder(messageConverters, customizers)));
 	}
 
 	@Bean
 	@ConditionalOnMissingBean
 	@ConditionalOnMissingClass("org.springframework.data.domain.Pageable")
-	public Encoder feignEncoder(ObjectProvider<AbstractFormWriter> formWriterProvider) {
-		return springEncoder(formWriterProvider);
+	public Encoder feignEncoder(ObjectProvider<AbstractFormWriter> formWriterProvider,
+			ObjectProvider<HttpMessageConverterCustomizer> customizers) {
+		return springEncoder(formWriterProvider, encoderProperties, customizers);
 	}
 
 	@Bean
 	@ConditionalOnClass(name = "org.springframework.data.domain.Pageable")
 	@ConditionalOnMissingBean
-	public Encoder feignEncoderPageable(ObjectProvider<AbstractFormWriter> formWriterProvider) {
-		PageableSpringEncoder encoder = new PageableSpringEncoder(springEncoder(formWriterProvider));
+	public Encoder feignEncoderPageable(ObjectProvider<AbstractFormWriter> formWriterProvider,
+			ObjectProvider<HttpMessageConverterCustomizer> customizers) {
+		PageableSpringEncoder encoder = new PageableSpringEncoder(
+				springEncoder(formWriterProvider, encoderProperties, customizers));
 
 		if (springDataWebProperties != null) {
 			encoder.setPageParameter(springDataWebProperties.getPageable().getPageParameter());
@@ -114,17 +127,30 @@ public class FeignClientsConfiguration {
 		return encoder;
 	}
 
+	@Bean
+	@ConditionalOnClass(name = "org.springframework.data.domain.Pageable")
+	@ConditionalOnMissingBean
+	public QueryMapEncoder feignQueryMapEncoderPageable() {
+		PageableSpringQueryMapEncoder queryMapEncoder = new PageableSpringQueryMapEncoder();
+		if (springDataWebProperties != null) {
+			queryMapEncoder.setPageParameter(springDataWebProperties.getPageable().getPageParameter());
+			queryMapEncoder.setSizeParameter(springDataWebProperties.getPageable().getSizeParameter());
+			queryMapEncoder.setSortParameter(springDataWebProperties.getSort().getSortParameter());
+		}
+		return queryMapEncoder;
+	}
+
 	@Bean
 	@ConditionalOnMissingBean
 	public Contract feignContract(ConversionService feignConversionService) {
 		boolean decodeSlash = feignClientProperties == null || feignClientProperties.isDecodeSlash();
-		return new SpringMvcContract(this.parameterProcessors, feignConversionService, decodeSlash);
+		return new SpringMvcContract(parameterProcessors, feignConversionService, decodeSlash);
 	}
 
 	@Bean
 	public FormattingConversionService feignConversionService() {
 		FormattingConversionService conversionService = new DefaultFormattingConversionService();
-		for (FeignFormatterRegistrar feignFormatterRegistrar : this.feignFormatterRegistrars) {
+		for (FeignFormatterRegistrar feignFormatterRegistrar : feignFormatterRegistrars) {
 			feignFormatterRegistrar.registerFormatters(conversionService);
 		}
 		return conversionService;
@@ -139,19 +165,7 @@ public class FeignClientsConfiguration {
 	@Bean
 	@ConditionalOnMissingBean(FeignLoggerFactory.class)
 	public FeignLoggerFactory feignLoggerFactory() {
-		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();
+		return new DefaultFeignLoggerFactory(logger);
 	}
 
 	@Bean
@@ -161,14 +175,16 @@ public class FeignClientsConfiguration {
 		};
 	}
 
-	private Encoder springEncoder(ObjectProvider<AbstractFormWriter> formWriterProvider) {
+	private Encoder springEncoder(ObjectProvider<AbstractFormWriter> formWriterProvider,
+			FeignEncoderProperties encoderProperties, ObjectProvider<HttpMessageConverterCustomizer> customizers) {
 		AbstractFormWriter formWriter = formWriterProvider.getIfAvailable();
 
 		if (formWriter != null) {
-			return new SpringEncoder(new SpringPojoFormEncoder(formWriter), this.messageConverters);
+			return new SpringEncoder(new SpringPojoFormEncoder(formWriter), messageConverters, encoderProperties,
+					customizers);
 		}
 		else {
-			return new SpringEncoder(new SpringFormEncoder(), this.messageConverters);
+			return new SpringEncoder(new SpringFormEncoder(), messageConverters, encoderProperties, customizers);
 		}
 	}
 
@@ -198,7 +214,7 @@ public class FeignClientsConfiguration {
 
 	@Configuration(proxyBeanMethods = false)
 	@ConditionalOnClass(CircuitBreaker.class)
-	@ConditionalOnProperty("feign.circuitbreaker.enabled")
+	@ConditionalOnProperty("spring.cloud.openfeign.circuitbreaker.enabled")
 	protected static class CircuitBreakerPresentFeignBuilderConfiguration {
 
 		@Bean
@@ -218,4 +234,19 @@ public class FeignClientsConfiguration {
 
 	}
 
+	@Configuration(proxyBeanMethods = false)
+	@ConditionalOnBean(type = "io.micrometer.core.instrument.MeterRegistry")
+	@ConditionalOnClass(name = "feign.micrometer.MicrometerCapability")
+	@ConditionalOnProperty(name = "spring.cloud.openfeign.metrics.enabled", matchIfMissing = true)
+	@Conditional(FeignClientMetricsEnabledCondition.class)
+	protected static class MetricsConfiguration {
+
+		@Bean
+		@ConditionalOnMissingBean
+		public MicrometerCapability micrometerCapability(MeterRegistry meterRegistry) {
+			return new MicrometerCapability(meterRegistry);
+		}
+
+	}
+
 }

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 2013-2022 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.
@@ -20,16 +20,26 @@ 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 feign.Request;
+
+import org.springframework.aop.scope.ScopedProxyUtils;
 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;
@@ -45,6 +55,7 @@ import org.springframework.core.type.AnnotationMetadata;
 import org.springframework.core.type.filter.AnnotationTypeFilter;
 import org.springframework.util.Assert;
 import org.springframework.util.ClassUtils;
+import org.springframework.util.ObjectUtils;
 import org.springframework.util.StringUtils;
 
 /**
@@ -53,6 +64,9 @@ import org.springframework.util.StringUtils;
  * @author Venil Noronha
  * @author Gang Li
  * @author Michal Domagala
+ * @author Marcin Grzejszczak
+ * @author Olga Maciaszek-Sharma
+ * @author Jasbir Singh
  */
 class FeignClientsRegistrar implements ImportBeanDefinitionRegistrar, ResourceLoaderAware, EnvironmentAware {
 
@@ -156,7 +170,6 @@ class FeignClientsRegistrar implements ImportBeanDefinitionRegistrar, ResourceLo
 
 		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) {
 			ClassPathScanningCandidateComponentProvider scanner = getScanner();
@@ -194,36 +207,55 @@ class FeignClientsRegistrar implements ImportBeanDefinitionRegistrar, ResourceLo
 	private void registerFeignClient(BeanDefinitionRegistry registry, AnnotationMetadata annotationMetadata,
 			Map<String, Object> attributes) {
 		String className = annotationMetadata.getClassName();
-		BeanDefinitionBuilder definition = BeanDefinitionBuilder.genericBeanDefinition(FeignClientFactoryBean.class);
-		validate(attributes);
-		definition.addPropertyValue("url", getUrl(attributes));
-		definition.addPropertyValue("path", getPath(attributes));
+		Class clazz = ClassUtils.resolveClassName(className, null);
+		ConfigurableBeanFactory beanFactory = registry instanceof ConfigurableBeanFactory
+				? (ConfigurableBeanFactory) registry : null;
+		String contextId = getContextId(beanFactory, attributes);
 		String name = getName(attributes);
-		definition.addPropertyValue("name", name);
-		String contextId = getContextId(attributes);
-		definition.addPropertyValue("contextId", contextId);
-		definition.addPropertyValue("type", className);
-		definition.addPropertyValue("decode404", attributes.get("decode404"));
-		definition.addPropertyValue("fallback", attributes.get("fallback"));
-		definition.addPropertyValue("fallbackFactory", attributes.get("fallbackFactory"));
+		FeignClientFactoryBean factoryBean = new FeignClientFactoryBean();
+		factoryBean.setBeanFactory(beanFactory);
+		factoryBean.setName(name);
+		factoryBean.setContextId(contextId);
+		factoryBean.setType(clazz);
+		factoryBean.setRefreshableClient(isClientRefreshEnabled());
+		BeanDefinitionBuilder definition = BeanDefinitionBuilder.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);
-		if (StringUtils.hasText(qualifier)) {
-			alias = qualifier;
+		String[] qualifiers = getQualifiers(attributes);
+		if (ObjectUtils.isEmpty(qualifiers)) {
+			qualifiers = new String[] { contextId + "FeignClient" };
 		}
 
-		BeanDefinitionHolder holder = new BeanDefinitionHolder(beanDefinition, className, new String[] { alias });
+		BeanDefinitionHolder holder = new BeanDefinitionHolder(beanDefinition, className, qualifiers);
 		BeanDefinitionReaderUtils.registerBeanDefinition(holder, registry);
+
+		registerOptionsBeanDefinition(registry, contextId);
 	}
 
 	private void validate(Map<String, Object> attributes) {
@@ -235,6 +267,10 @@ class FeignClientsRegistrar implements ImportBeanDefinitionRegistrar, ResourceLo
 	}
 
 	/* 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");
@@ -242,34 +278,46 @@ class FeignClientsRegistrar implements ImportBeanDefinitionRegistrar, ResourceLo
 		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;
+			}
+			Object evaluateValue = resolver.evaluate(resolved, new BeanExpressionContext(beanFactory, null));
+			if (evaluateValue != null) {
+				return String.valueOf(evaluateValue);
+			}
+			return null;
 		}
 		return value;
 	}
 
-	private String getUrl(Map<String, Object> attributes) {
-		String url = resolve((String) attributes.get("url"));
+	private String getUrl(ConfigurableBeanFactory beanFactory, Map<String, Object> attributes) {
+		String url = resolve(beanFactory, (String) attributes.get("url"));
 		return getUrl(url);
 	}
 
-	private String getPath(Map<String, Object> attributes) {
-		String path = resolve((String) attributes.get("path"));
+	private String getPath(ConfigurableBeanFactory beanFactory, Map<String, Object> attributes) {
+		String path = resolve(beanFactory, (String) attributes.get("path"));
 		return getPath(path);
 	}
 
@@ -324,6 +372,18 @@ class FeignClientsRegistrar implements ImportBeanDefinitionRegistrar, ResourceLo
 		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;
@@ -359,4 +419,28 @@ class FeignClientsRegistrar implements ImportBeanDefinitionRegistrar, ResourceLo
 		this.environment = environment;
 	}
 
+	/**
+	 * This method is meant to create {@link Request.Options} beans definition with
+	 * refreshScope.
+	 * @param registry spring bean definition registry
+	 * @param contextId name of feign client
+	 */
+	private void registerOptionsBeanDefinition(BeanDefinitionRegistry registry, String contextId) {
+		if (isClientRefreshEnabled()) {
+			String beanName = Request.Options.class.getCanonicalName() + "-" + contextId;
+			BeanDefinitionBuilder definitionBuilder = BeanDefinitionBuilder
+					.genericBeanDefinition(OptionsFactoryBean.class);
+			definitionBuilder.setScope("refresh");
+			definitionBuilder.addPropertyValue("contextId", contextId);
+			BeanDefinitionHolder definitionHolder = new BeanDefinitionHolder(definitionBuilder.getBeanDefinition(),
+					beanName);
+			definitionHolder = ScopedProxyUtils.createScopedProxy(definitionHolder, registry, true);
+			BeanDefinitionReaderUtils.registerBeanDefinition(definitionHolder, registry);
+		}
+	}
+
+	private boolean isClientRefreshEnabled() {
+		return environment.getProperty("spring.cloud.openfeign.client.refresh-enabled", Boolean.class, false);
+	}
+
 }

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2022 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.
@@ -30,11 +30,12 @@ import org.springframework.lang.Nullable;
  * @author Spencer Gibb
  * @author Dave Syer
  * @author Matt King
+ * @author Jasbir Singh
  */
 public class FeignContext extends NamedContextFactory<FeignClientSpecification> {
 
 	public FeignContext() {
-		super(FeignClientsConfiguration.class, "feign", "feign.client.name");
+		super(FeignClientsConfiguration.class, "spring.cloud.openfeign", "spring.cloud.openfeign.client.name");
 	}
 
 	@Nullable
@@ -52,4 +53,8 @@ public class FeignContext extends NamedContextFactory<FeignClientSpecification>
 		return getContext(name).getBeansOfType(type);
 	}
 
+	public <T> T getInstance(String contextName, String beanName, Class<T> type) {
+		return getContext(contextName).getBean(beanName, type);
+	}
+
 }

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2020-2020 the original author or authors.
+ * Copyright 2020-2022 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.

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2022 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.

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-2020 the original author or authors.
+ * Copyright 2016-2022 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.

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

@@ -0,0 +1,43 @@
+/*
+ * Copyright 2013-2022 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 = "spring.cloud.openfeign.httpclient.hc5.enabled", havingValue = "false",
+			matchIfMissing = true)
+	static class HttpClient5Disabled {
+
+	}
+
+}

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

@@ -0,0 +1,86 @@
+/*
+ * Copyright 2013-2022 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.util.Objects;
+import java.util.concurrent.TimeUnit;
+
+import feign.Request;
+
+import org.springframework.beans.BeansException;
+import org.springframework.beans.factory.FactoryBean;
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.ApplicationContextAware;
+
+/**
+ * This factory bean is meant to create {@link Request.Options} instance as per the
+ * applicable configurations.
+ *
+ * @author Jasbir Singh
+ */
+public class OptionsFactoryBean implements FactoryBean<Request.Options>, ApplicationContextAware {
+
+	private ApplicationContext applicationContext;
+
+	private String contextId;
+
+	private Request.Options options;
+
+	@Override
+	public Class<?> getObjectType() {
+		return Request.Options.class;
+	}
+
+	@Override
+	public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
+		this.applicationContext = applicationContext;
+	}
+
+	@Override
+	public Request.Options getObject() throws Exception {
+		if (options != null) {
+			return options;
+		}
+
+		options = new Request.Options();
+		FeignClientProperties properties = applicationContext.getBean(FeignClientProperties.class);
+		options = createOptionsWithApplicableValues(properties.getConfig().get(properties.getDefaultConfig()), options);
+		options = createOptionsWithApplicableValues(properties.getConfig().get(contextId), options);
+		return options;
+	}
+
+	public void setContextId(String contextId) {
+		this.contextId = contextId;
+	}
+
+	private Request.Options createOptionsWithApplicableValues(
+			FeignClientProperties.FeignClientConfiguration clientConfiguration, Request.Options options) {
+		if (Objects.isNull(clientConfiguration)) {
+			return options;
+		}
+
+		int connectTimeoutMillis = Objects.nonNull(clientConfiguration.getConnectTimeout())
+				? clientConfiguration.getConnectTimeout() : options.connectTimeoutMillis();
+		int readTimeoutMillis = Objects.nonNull(clientConfiguration.getReadTimeout())
+				? clientConfiguration.getReadTimeout() : options.readTimeoutMillis();
+		boolean followRedirects = Objects.nonNull(clientConfiguration.isFollowRedirects())
+				? clientConfiguration.isFollowRedirects() : options.isFollowRedirects();
+		return new Request.Options(connectTimeoutMillis, TimeUnit.MILLISECONDS, readTimeoutMillis,
+				TimeUnit.MILLISECONDS, followRedirects);
+	}
+
+}

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2022 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.

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2022 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.

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

@@ -0,0 +1,67 @@
+/*
+ * Copyright 2013-2022 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.annotation;
+
+import java.lang.annotation.Annotation;
+import java.lang.reflect.Method;
+import java.util.Arrays;
+
+import feign.MethodMetadata;
+
+import org.springframework.cloud.openfeign.AnnotatedParameterProcessor;
+import org.springframework.http.HttpHeaders;
+import org.springframework.web.bind.annotation.CookieValue;
+
+import static feign.Util.checkState;
+import static feign.Util.emptyToNull;
+
+/**
+ * @{link CookieValue} annotation processor.
+ * @author Gong Yi
+ *
+ */
+public class CookieValueParameterProcessor implements AnnotatedParameterProcessor {
+
+	private static final Class<CookieValue> ANNOTATION = CookieValue.class;
+
+	@Override
+	public Class<? extends Annotation> getAnnotationType() {
+		return ANNOTATION;
+	}
+
+	@Override
+	public boolean processArgument(AnnotatedParameterContext context, Annotation annotation, Method method) {
+		int parameterIndex = context.getParameterIndex();
+		MethodMetadata data = context.getMethodMetadata();
+		CookieValue cookie = ANNOTATION.cast(annotation);
+		String name = cookie.value().trim();
+		checkState(emptyToNull(name) != null, "Cookie.name() was empty on parameter %s", parameterIndex);
+		context.setParameterName(name);
+		String cookieExpression = data.template().headers().getOrDefault(HttpHeaders.COOKIE, Arrays.asList("")).stream()
+				.findFirst().orElse("");
+		if (cookieExpression.length() == 0) {
+			cookieExpression = String.format("%s={%s}", name, name);
+		}
+		else {
+			cookieExpression += String.format("; %s={%s}", name, name);
+		}
+		data.template().removeHeader(HttpHeaders.COOKIE);
+		data.template().header(HttpHeaders.COOKIE, cookieExpression);
+		return true;
+	}
+
+}

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2022 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.
@@ -72,8 +72,8 @@ public class MatrixVariableParameterProcessor implements AnnotatedParameterProce
 	private String expandMap(Object object) {
 		Map<String, Object> paramMap = (Map) object;
 
-		return paramMap.keySet().stream().map(key -> ";" + key + "=" + paramMap.get(key).toString())
-				.collect(Collectors.joining());
+		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/annotation/PathVariableParameterProcessor.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2022 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.
@@ -34,6 +34,7 @@ import static feign.Util.emptyToNull;
  *
  * @author Jakub Narloch
  * @author Abhijit Sarkar
+ * @author Yanming Zhou
  * @see AnnotatedParameterProcessor
  */
 public class PathVariableParameterProcessor implements AnnotatedParameterProcessor {
@@ -54,7 +55,8 @@ public class PathVariableParameterProcessor implements AnnotatedParameterProcess
 
 		MethodMetadata data = context.getMethodMetadata();
 		String varName = '{' + name + '}';
-		if (!data.template().url().contains(varName) && !searchMapValues(data.template().queries(), varName)
+		String varNameRegex = ".*\\{" + name + "(:[^}]+)?\\}.*";
+		if (!data.template().url().matches(varNameRegex) && !searchMapValues(data.template().queries(), varName)
 				&& !searchMapValues(data.template().headers(), varName)) {
 			data.formParams().add(name);
 		}

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2022 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.

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2022 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.

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2022 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.

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2022 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.

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2019 the original author or authors.
+ * Copyright 2013-2022 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.

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

@@ -0,0 +1,146 @@
+/*
+ * Copyright 2013-2022 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.net.ssl.SSLContext;
+import javax.net.ssl.TrustManager;
+import javax.net.ssl.X509TrustManager;
+
+import jakarta.annotation.PreDestroy;
+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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2022 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.
@@ -20,8 +20,7 @@ import java.io.IOException;
 import java.util.Timer;
 import java.util.TimerTask;
 
-import javax.annotation.PreDestroy;
-
+import jakarta.annotation.PreDestroy;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.apache.http.client.config.RequestConfig;
@@ -80,7 +79,7 @@ public class HttpClientFeignConfiguration {
 	}
 
 	@Bean
-	@ConditionalOnProperty(value = "feign.compression.response.enabled", havingValue = "true")
+	@ConditionalOnProperty(value = "spring.cloud.openfeign.compression.response.enabled", havingValue = "true")
 	public CloseableHttpClient customHttpClient(HttpClientConnectionManager httpClientConnectionManager,
 			FeignHttpClientProperties httpClientProperties) {
 		HttpClientBuilder builder = HttpClientBuilder.create().disableCookieManagement().useSystemProperties();
@@ -89,7 +88,8 @@ public class HttpClientFeignConfiguration {
 	}
 
 	@Bean
-	@ConditionalOnProperty(value = "feign.compression.response.enabled", havingValue = "false", matchIfMissing = true)
+	@ConditionalOnProperty(value = "spring.cloud.openfeign.compression.response.enabled", havingValue = "false",
+			matchIfMissing = true)
 	public CloseableHttpClient httpClient(ApacheHttpClientFactory httpClientFactory,
 			HttpClientConnectionManager httpClientConnectionManager, FeignHttpClientProperties httpClientProperties) {
 		this.httpClient = createClient(httpClientFactory.createBuilder(), httpClientConnectionManager,

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2022 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.
@@ -16,10 +16,10 @@
 
 package org.springframework.cloud.openfeign.clientconfig;
 
+import java.time.Duration;
 import java.util.concurrent.TimeUnit;
 
-import javax.annotation.PreDestroy;
-
+import jakarta.annotation.PreDestroy;
 import okhttp3.ConnectionPool;
 import okhttp3.OkHttpClient;
 
@@ -48,8 +48,8 @@ public class OkHttpFeignConfiguration {
 	@ConditionalOnMissingBean(ConnectionPool.class)
 	public ConnectionPool httpClientConnectionPool(FeignHttpClientProperties httpClientProperties,
 			OkHttpClientConnectionPoolFactory connectionPoolFactory) {
-		Integer maxTotalConnections = httpClientProperties.getMaxConnections();
-		Long timeToLive = httpClientProperties.getTimeToLive();
+		int maxTotalConnections = httpClientProperties.getMaxConnections();
+		long timeToLive = httpClientProperties.getTimeToLive();
 		TimeUnit ttlUnit = httpClientProperties.getTimeToLiveUnit();
 		return connectionPoolFactory.create(maxTotalConnections, timeToLive, ttlUnit);
 	}
@@ -57,11 +57,12 @@ public class OkHttpFeignConfiguration {
 	@Bean
 	public okhttp3.OkHttpClient client(OkHttpClientFactory httpClientFactory, ConnectionPool connectionPool,
 			FeignHttpClientProperties httpClientProperties) {
-		Boolean followRedirects = httpClientProperties.isFollowRedirects();
-		Integer connectTimeout = httpClientProperties.getConnectionTimeout();
+		boolean followRedirects = httpClientProperties.isFollowRedirects();
+		int connectTimeout = httpClientProperties.getConnectionTimeout();
+		Duration reaTimeout = httpClientProperties.getOkHttp().getReadTimeout();
 		this.okHttpClient = httpClientFactory.createBuilder(httpClientProperties.isDisableSslValidation())
 				.connectTimeout(connectTimeout, TimeUnit.MILLISECONDS).followRedirects(followRedirects)
-				.connectionPool(connectionPool).build();
+				.readTimeout(reaTimeout).connectionPool(connectionPool).build();
 		return this.okHttpClient;
 	}
 

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2022 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.

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2022 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.
@@ -39,7 +39,7 @@ import org.springframework.context.annotation.Configuration;
 @EnableConfigurationProperties(FeignClientEncodingProperties.class)
 @ConditionalOnClass(Feign.class)
 @ConditionalOnBean(Client.class)
-@ConditionalOnProperty(value = "feign.compression.response.enabled", matchIfMissing = false)
+@ConditionalOnProperty(value = "spring.cloud.openfeign.compression.response.enabled", matchIfMissing = false)
 // The OK HTTP client uses "transparent" compression.
 // If the accept-encoding header is present it disable transparent compression
 @ConditionalOnMissingBean(type = "okhttp3.OkHttpClient")

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2022 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.

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2022 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.
@@ -26,7 +26,7 @@ import org.springframework.boot.context.properties.ConfigurationProperties;
  *
  * @author Jakub Narloch
  */
-@ConfigurationProperties("feign.compression.request")
+@ConfigurationProperties("spring.cloud.openfeign.compression.request")
 public class FeignClientEncodingProperties {
 
 	/**

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2022 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.
@@ -39,7 +39,7 @@ import org.springframework.context.annotation.Configuration;
 // The OK HTTP client uses "transparent" compression.
 // If the content-encoding header is present it disable transparent compression
 @ConditionalOnMissingBean(type = "okhttp3.OkHttpClient")
-@ConditionalOnProperty("feign.compression.request.enabled")
+@ConditionalOnProperty("spring.cloud.openfeign.compression.request.enabled")
 @AutoConfigureAfter(FeignAutoConfiguration.class)
 public class FeignContentGzipEncodingAutoConfiguration {
 

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2022 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.
@@ -83,7 +83,7 @@ public class FeignContentGzipEncodingInterceptor extends BaseRequestInterceptor
 	}
 
 	/**
-	 * Returns whether the content mime types matches the configures mime types.
+	 * Returns whether the content mime types matches the configured mime types.
 	 * @param contentTypes the content types
 	 * @return true if any specified content type matches the request content types
 	 */

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2022 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.

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 2016-2022 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.
@@ -16,77 +16,34 @@
 
 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.cloud.openfeign.support.HttpMessageConverterCustomizer;
 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.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;
+import org.springframework.hateoas.config.HateoasConfiguration;
+import org.springframework.hateoas.config.WebConverters;
 
 /**
  * @author Hector Espert
+ * @author Olga Maciaszek-Sharma
  */
 @Configuration(proxyBeanMethods = false)
 @ConditionalOnWebApplication
-@ConditionalOnClass(RepresentationModel.class)
+@ConditionalOnClass(WebConverters.class)
 @AutoConfigureAfter({ JacksonAutoConfiguration.class, HttpMessageConvertersAutoConfiguration.class,
-		RepositoryRestMvcAutoConfiguration.class })
-@AutoConfigureBefore(HypermediaAutoConfiguration.class)
+		RepositoryRestMvcAutoConfiguration.class, HateoasConfiguration.class })
 public class FeignHalAutoConfiguration {
 
 	@Bean
-	@ConditionalOnMissingBean
-	public TypeConstrainedMappingJackson2HttpMessageConverter halJacksonHttpMessageConverter(
-			ObjectProvider<ObjectMapper> objectMapper, ObjectProvider<HalConfiguration> 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 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.setObjectMapper(mapper);
-		return converter;
+	@ConditionalOnBean(WebConverters.class)
+	HttpMessageConverterCustomizer webConvertersCustomizer(WebConverters webConverters) {
+		return new WebConvertersCustomizer(webConverters);
 	}
 
 }

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

@@ -0,0 +1,41 @@
+/*
+ * Copyright 2016-2022 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.hateoas;
+
+import java.util.List;
+
+import org.springframework.cloud.openfeign.support.HttpMessageConverterCustomizer;
+import org.springframework.hateoas.config.WebConverters;
+import org.springframework.http.converter.HttpMessageConverter;
+
+/**
+ * @author Olga Maciaszek-Sharma
+ */
+public class WebConvertersCustomizer implements HttpMessageConverterCustomizer {
+
+	private final WebConverters webConverters;
+
+	public WebConvertersCustomizer(WebConverters webConverters) {
+		this.webConverters = webConverters;
+	}
+
+	@Override
+	public void accept(List<HttpMessageConverter<?>> httpMessageConverters) {
+		webConverters.augmentClient(httpMessageConverters);
+	}
+
+}

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2022 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 org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
@@ -25,7 +27,7 @@ import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
 import org.springframework.cloud.client.loadbalancer.LoadBalancedRetryFactory;
 import org.springframework.cloud.client.loadbalancer.LoadBalancerClient;
-import org.springframework.cloud.client.loadbalancer.LoadBalancerProperties;
+import org.springframework.cloud.client.loadbalancer.LoadBalancerClientsProperties;
 import org.springframework.cloud.loadbalancer.support.LoadBalancerClientFactory;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Conditional;
@@ -36,19 +38,21 @@ import org.springframework.context.annotation.Configuration;
  * that uses {@link Client.Default} under the hood.
  *
  * @author Olga Maciaszek-Sharma
+ * @author changjin wei(魏昌进)
  * @since 2.2.0
  */
 @Configuration(proxyBeanMethods = false)
-@EnableConfigurationProperties(LoadBalancerProperties.class)
+@EnableConfigurationProperties(LoadBalancerClientsProperties.class)
 class DefaultFeignLoadBalancerConfiguration {
 
 	@Bean
 	@ConditionalOnMissingBean
 	@Conditional(OnRetryNotEnabledCondition.class)
-	public Client feignClient(LoadBalancerClient loadBalancerClient, LoadBalancerProperties properties,
-			LoadBalancerClientFactory loadBalancerClientFactory) {
-		return new FeignBlockingLoadBalancerClient(new Client.Default(null, null), loadBalancerClient, properties,
-				loadBalancerClientFactory);
+	public Client feignClient(LoadBalancerClient loadBalancerClient,
+			LoadBalancerClientFactory loadBalancerClientFactory,
+			List<LoadBalancerFeignRequestTransformer> transformers) {
+		return new FeignBlockingLoadBalancerClient(new Client.Default(null, null), loadBalancerClient,
+				loadBalancerClientFactory, transformers);
 	}
 
 	@Bean
@@ -58,10 +62,10 @@ class DefaultFeignLoadBalancerConfiguration {
 	@ConditionalOnProperty(value = "spring.cloud.loadbalancer.retry.enabled", havingValue = "true",
 			matchIfMissing = true)
 	public Client feignRetryClient(LoadBalancerClient loadBalancerClient,
-			LoadBalancedRetryFactory loadBalancedRetryFactory, LoadBalancerProperties properties,
-			LoadBalancerClientFactory loadBalancerClientFactory) {
+			LoadBalancedRetryFactory loadBalancedRetryFactory, LoadBalancerClientFactory loadBalancerClientFactory,
+			List<LoadBalancerFeignRequestTransformer> transformers) {
 		return new RetryableFeignBlockingLoadBalancerClient(new Client.Default(null, null), loadBalancerClient,
-				loadBalancedRetryFactory, properties, loadBalancerClientFactory);
+				loadBalancedRetryFactory, loadBalancerClientFactory, transformers);
 	}
 
 }

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2022 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 +19,8 @@ package org.springframework.cloud.openfeign.loadbalancer;
 import java.io.IOException;
 import java.net.URI;
 import java.nio.charset.StandardCharsets;
+import java.util.Collections;
+import java.util.List;
 import java.util.Set;
 
 import feign.Client;
@@ -49,6 +51,7 @@ import static org.springframework.cloud.openfeign.loadbalancer.LoadBalancerUtils
  * {@link ServiceInstance} to use while resolving the request host.
  *
  * @author Olga Maciaszek-Sharma
+ * @author changjin wei(魏昌进)
  * @since 2.2.0
  */
 @SuppressWarnings({ "unchecked", "rawtypes" })
@@ -60,16 +63,43 @@ public class FeignBlockingLoadBalancerClient implements Client {
 
 	private final LoadBalancerClient loadBalancerClient;
 
-	private final LoadBalancerProperties properties;
-
 	private final LoadBalancerClientFactory loadBalancerClientFactory;
 
+	private final List<LoadBalancerFeignRequestTransformer> transformers;
+
+	/**
+	 * @deprecated in favour of
+	 * {@link FeignBlockingLoadBalancerClient#FeignBlockingLoadBalancerClient(Client, LoadBalancerClient, LoadBalancerClientFactory, List)}
+	 */
+	@Deprecated
 	public FeignBlockingLoadBalancerClient(Client delegate, LoadBalancerClient loadBalancerClient,
 			LoadBalancerProperties properties, LoadBalancerClientFactory loadBalancerClientFactory) {
 		this.delegate = delegate;
 		this.loadBalancerClient = loadBalancerClient;
-		this.properties = properties;
 		this.loadBalancerClientFactory = loadBalancerClientFactory;
+		this.transformers = Collections.emptyList();
+	}
+
+	/**
+	 * @deprecated in favour of
+	 * {@link FeignBlockingLoadBalancerClient#FeignBlockingLoadBalancerClient(Client, LoadBalancerClient, LoadBalancerClientFactory, List)}
+	 */
+	@Deprecated
+	public FeignBlockingLoadBalancerClient(Client delegate, LoadBalancerClient loadBalancerClient,
+			LoadBalancerClientFactory loadBalancerClientFactory) {
+		this.delegate = delegate;
+		this.loadBalancerClient = loadBalancerClient;
+		this.loadBalancerClientFactory = loadBalancerClientFactory;
+		this.transformers = Collections.emptyList();
+	}
+
+	public FeignBlockingLoadBalancerClient(Client delegate, LoadBalancerClient loadBalancerClient,
+			LoadBalancerClientFactory loadBalancerClientFactory,
+			List<LoadBalancerFeignRequestTransformer> transformers) {
+		this.delegate = delegate;
+		this.loadBalancerClient = loadBalancerClient;
+		this.loadBalancerClientFactory = loadBalancerClientFactory;
+		this.transformers = transformers;
 	}
 
 	@Override
@@ -100,7 +130,7 @@ public class FeignBlockingLoadBalancerClient implements Client {
 					.body(message, StandardCharsets.UTF_8).build();
 		}
 		String reconstructedUrl = loadBalancerClient.reconstructURI(instance, originalUri).toString();
-		Request newRequest = buildRequest(request, reconstructedUrl);
+		Request newRequest = buildRequest(request, reconstructedUrl, instance);
 		return executeWithLoadBalancerLifecycleProcessing(delegate, options, newRequest, lbRequest, lbResponse,
 				supportedLifecycleProcessors);
 	}
@@ -110,12 +140,23 @@ public class FeignBlockingLoadBalancerClient implements Client {
 				request.charset(), request.requestTemplate());
 	}
 
+	protected Request buildRequest(Request request, String reconstructedUrl, ServiceInstance instance) {
+		Request newRequest = buildRequest(request, reconstructedUrl);
+		if (transformers != null) {
+			for (LoadBalancerFeignRequestTransformer transformer : transformers) {
+				newRequest = transformer.transformRequest(newRequest, instance);
+			}
+		}
+		return newRequest;
+	}
+
 	// Visible for Sleuth instrumentation
 	public Client getDelegate() {
 		return delegate;
 	}
 
 	private String getHint(String serviceId) {
+		LoadBalancerProperties properties = loadBalancerClientFactory.getProperties(serviceId);
 		String defaultHint = properties.getHint().getOrDefault("default", "default");
 		String hintPropertyValue = properties.getHint().get(serviceId);
 		return hintPropertyValue != null ? hintPropertyValue : defaultHint;

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 2013-2022 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 +19,14 @@ package org.springframework.cloud.openfeign.loadbalancer;
 import feign.Client;
 import feign.Feign;
 
+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.context.properties.EnableConfigurationProperties;
+import org.springframework.cloud.client.loadbalancer.LoadBalancerAutoConfiguration;
 import org.springframework.cloud.client.loadbalancer.LoadBalancerClient;
+import org.springframework.cloud.loadbalancer.config.BlockingLoadBalancerClientAutoConfiguration;
 import org.springframework.cloud.loadbalancer.support.LoadBalancerClientFactory;
 import org.springframework.cloud.openfeign.FeignAutoConfiguration;
 import org.springframework.cloud.openfeign.support.FeignHttpClientProperties;
@@ -35,18 +38,20 @@ import org.springframework.context.annotation.Import;
  * of {@link Client}.
  *
  * @author Olga Maciaszek-Sharma
+ * @author Nguyen Ky Thanh
  * @since 2.2.0
  */
 @ConditionalOnClass(Feign.class)
 @ConditionalOnBean({ LoadBalancerClient.class, LoadBalancerClientFactory.class })
 @AutoConfigureBefore(FeignAutoConfiguration.class)
+@AutoConfigureAfter({ BlockingLoadBalancerClientAutoConfiguration.class, LoadBalancerAutoConfiguration.class })
 @EnableConfigurationProperties(FeignHttpClientProperties.class)
 @Configuration(proxyBeanMethods = false)
 // Order is important here, last should be the default, first should be optional
 // see
 // https://github.com/spring-cloud/spring-cloud-netflix/issues/2086#issuecomment-316281653
 @Import({ HttpClientFeignLoadBalancerConfiguration.class, OkHttpFeignLoadBalancerConfiguration.class,
-		DefaultFeignLoadBalancerConfiguration.class })
+		HttpClient5FeignLoadBalancerConfiguration.class, DefaultFeignLoadBalancerConfiguration.class })
 public class FeignLoadBalancerAutoConfiguration {
 
 }

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

@@ -0,0 +1,80 @@
+/*
+ * Copyright 2013-2022 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.boot.context.properties.EnableConfigurationProperties;
+import org.springframework.cloud.client.loadbalancer.LoadBalancedRetryFactory;
+import org.springframework.cloud.client.loadbalancer.LoadBalancerClient;
+import org.springframework.cloud.client.loadbalancer.LoadBalancerClientsProperties;
+import org.springframework.cloud.loadbalancer.support.LoadBalancerClientFactory;
+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;
+
+/**
+ * Configuration instantiating a {@link LoadBalancerClient}-based {@link Client} object
+ * that uses {@link ApacheHttp5Client} under the hood.
+ *
+ * @author Nguyen Ky Thanh
+ * @author changjin wei(魏昌进)
+ */
+@Configuration(proxyBeanMethods = false)
+@ConditionalOnClass(ApacheHttp5Client.class)
+@ConditionalOnBean({ LoadBalancerClient.class, LoadBalancerClientFactory.class })
+@ConditionalOnProperty(value = "spring.cloud.openfeign.httpclient.hc5.enabled", havingValue = "true")
+@Import(HttpClient5FeignConfiguration.class)
+@EnableConfigurationProperties(LoadBalancerClientsProperties.class)
+class HttpClient5FeignLoadBalancerConfiguration {
+
+	@Bean
+	@ConditionalOnMissingBean
+	@Conditional(OnRetryNotEnabledCondition.class)
+	public Client feignClient(LoadBalancerClient loadBalancerClient, HttpClient httpClient5,
+			LoadBalancerClientFactory loadBalancerClientFactory,
+			List<LoadBalancerFeignRequestTransformer> transformers) {
+		Client delegate = new ApacheHttp5Client(httpClient5);
+		return new FeignBlockingLoadBalancerClient(delegate, loadBalancerClient, loadBalancerClientFactory,
+				transformers);
+	}
+
+	@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(LoadBalancerClient loadBalancerClient, HttpClient httpClient5,
+			LoadBalancedRetryFactory loadBalancedRetryFactory, LoadBalancerClientFactory loadBalancerClientFactory,
+			List<LoadBalancerFeignRequestTransformer> transformers) {
+		Client delegate = new ApacheHttp5Client(httpClient5);
+		return new RetryableFeignBlockingLoadBalancerClient(delegate, loadBalancerClient, loadBalancedRetryFactory,
+				loadBalancerClientFactory, transformers);
+	}
+
+}

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 2013-2022 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;
@@ -27,8 +29,9 @@ import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
 import org.springframework.cloud.client.loadbalancer.LoadBalancedRetryFactory;
 import org.springframework.cloud.client.loadbalancer.LoadBalancerClient;
-import org.springframework.cloud.client.loadbalancer.LoadBalancerProperties;
+import org.springframework.cloud.client.loadbalancer.LoadBalancerClientsProperties;
 import org.springframework.cloud.loadbalancer.support.LoadBalancerClientFactory;
+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;
@@ -40,23 +43,28 @@ import org.springframework.context.annotation.Import;
  * that uses {@link ApacheHttpClient} under the hood.
  *
  * @author Olga Maciaszek-Sharma
+ * @author Nguyen Ky Thanh
+ * @author changjin wei(魏昌进)
  * @since 2.2.0
  */
 @Configuration(proxyBeanMethods = false)
 @ConditionalOnClass(ApacheHttpClient.class)
 @ConditionalOnBean({ LoadBalancerClient.class, LoadBalancerClientFactory.class })
-@ConditionalOnProperty(value = "feign.httpclient.enabled", matchIfMissing = true)
+@ConditionalOnProperty(value = "spring.cloud.openfeign.httpclient.enabled", matchIfMissing = true)
+@Conditional(HttpClient5DisabledConditions.class)
 @Import(HttpClientFeignConfiguration.class)
-@EnableConfigurationProperties(LoadBalancerProperties.class)
+@EnableConfigurationProperties(LoadBalancerClientsProperties.class)
 class HttpClientFeignLoadBalancerConfiguration {
 
 	@Bean
 	@ConditionalOnMissingBean
 	@Conditional(OnRetryNotEnabledCondition.class)
 	public Client feignClient(LoadBalancerClient loadBalancerClient, HttpClient httpClient,
-			LoadBalancerProperties properties, LoadBalancerClientFactory loadBalancerClientFactory) {
+			LoadBalancerClientFactory loadBalancerClientFactory,
+			List<LoadBalancerFeignRequestTransformer> transformers) {
 		ApacheHttpClient delegate = new ApacheHttpClient(httpClient);
-		return new FeignBlockingLoadBalancerClient(delegate, loadBalancerClient, properties, loadBalancerClientFactory);
+		return new FeignBlockingLoadBalancerClient(delegate, loadBalancerClient, loadBalancerClientFactory,
+				transformers);
 	}
 
 	@Bean
@@ -66,11 +74,11 @@ class HttpClientFeignLoadBalancerConfiguration {
 	@ConditionalOnProperty(value = "spring.cloud.loadbalancer.retry.enabled", havingValue = "true",
 			matchIfMissing = true)
 	public Client feignRetryClient(LoadBalancerClient loadBalancerClient, HttpClient httpClient,
-			LoadBalancedRetryFactory loadBalancedRetryFactory, LoadBalancerProperties properties,
-			LoadBalancerClientFactory loadBalancerClientFactory) {
+			LoadBalancedRetryFactory loadBalancedRetryFactory, LoadBalancerClientFactory loadBalancerClientFactory,
+			List<LoadBalancerFeignRequestTransformer> transformers) {
 		ApacheHttpClient delegate = new ApacheHttpClient(httpClient);
 		return new RetryableFeignBlockingLoadBalancerClient(delegate, loadBalancerClient, loadBalancedRetryFactory,
-				properties, loadBalancerClientFactory);
+				loadBalancerClientFactory, transformers);
 	}
 
 }

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

@@ -0,0 +1,47 @@
+/*
+ * Copyright 2013-2022 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 feign.Request;
+
+import org.springframework.cloud.client.ServiceInstance;
+import org.springframework.core.annotation.Order;
+
+/**
+ * Allows applications to transform the load-balanced {@link Request} given the chosen
+ * {@link org.springframework.cloud.client.ServiceInstance}.
+ *
+ * @author changjin wei(魏昌进)
+ */
+@Order(LoadBalancerFeignRequestTransformer.DEFAULT_ORDER)
+public interface LoadBalancerFeignRequestTransformer {
+
+	/**
+	 * Order for the {@link LoadBalancerFeignRequestTransformer}.
+	 */
+	int DEFAULT_ORDER = 0;
+
+	/**
+	 * Allows transforming load-balanced requests based on the provided
+	 * {@link ServiceInstance}.
+	 * @param request Original request.
+	 * @param instance ServiceInstance returned from LoadBalancer.
+	 * @return New request or original request
+	 */
+	Request transformRequest(Request request, ServiceInstance instance);
+
+}

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

@@ -0,0 +1,46 @@
+/*
+ * Copyright 2013-2022 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/LoadBalancerUtils.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2022 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.
@@ -33,7 +33,7 @@ import org.springframework.cloud.client.loadbalancer.RequestData;
 import org.springframework.cloud.client.loadbalancer.ResponseData;
 import org.springframework.http.HttpHeaders;
 import org.springframework.http.HttpMethod;
-import org.springframework.http.HttpStatus;
+import org.springframework.http.HttpStatusCode;
 
 /**
  * @author Olga Maciaszek-Sharma
@@ -73,7 +73,7 @@ final class LoadBalancerUtils {
 	static ResponseData buildResponseData(Response response) {
 		HttpHeaders responseHeaders = new HttpHeaders();
 		response.headers().forEach((key, value) -> responseHeaders.put(key, new ArrayList<>(value)));
-		return new ResponseData(HttpStatus.resolve(response.status()), responseHeaders, null,
+		return new ResponseData(HttpStatusCode.valueOf(response.status()), responseHeaders, null,
 				buildRequestData(response.request()));
 	}
 

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2022 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.okhttp.OkHttpClient;
 
@@ -26,7 +28,7 @@ import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
 import org.springframework.cloud.client.loadbalancer.LoadBalancedRetryFactory;
 import org.springframework.cloud.client.loadbalancer.LoadBalancerClient;
-import org.springframework.cloud.client.loadbalancer.LoadBalancerProperties;
+import org.springframework.cloud.client.loadbalancer.LoadBalancerClientsProperties;
 import org.springframework.cloud.loadbalancer.support.LoadBalancerClientFactory;
 import org.springframework.cloud.openfeign.clientconfig.OkHttpFeignConfiguration;
 import org.springframework.context.annotation.Bean;
@@ -39,23 +41,26 @@ import org.springframework.context.annotation.Import;
  * that uses {@link OkHttpClient} under the hood.
  *
  * @author Olga Maciaszek-Sharma
+ * @author changjin wei(魏昌进)
  * @since 2.2.0
  */
 @Configuration(proxyBeanMethods = false)
 @ConditionalOnClass(OkHttpClient.class)
-@ConditionalOnProperty("feign.okhttp.enabled")
+@ConditionalOnProperty("spring.cloud.openfeign.okhttp.enabled")
 @ConditionalOnBean({ LoadBalancerClient.class, LoadBalancerClientFactory.class })
 @Import(OkHttpFeignConfiguration.class)
-@EnableConfigurationProperties(LoadBalancerProperties.class)
+@EnableConfigurationProperties(LoadBalancerClientsProperties.class)
 class OkHttpFeignLoadBalancerConfiguration {
 
 	@Bean
 	@ConditionalOnMissingBean
 	@Conditional(OnRetryNotEnabledCondition.class)
 	public Client feignClient(okhttp3.OkHttpClient okHttpClient, LoadBalancerClient loadBalancerClient,
-			LoadBalancerProperties properties, LoadBalancerClientFactory loadBalancerClientFactory) {
+			LoadBalancerClientFactory loadBalancerClientFactory,
+			List<LoadBalancerFeignRequestTransformer> transformers) {
 		OkHttpClient delegate = new OkHttpClient(okHttpClient);
-		return new FeignBlockingLoadBalancerClient(delegate, loadBalancerClient, properties, loadBalancerClientFactory);
+		return new FeignBlockingLoadBalancerClient(delegate, loadBalancerClient, loadBalancerClientFactory,
+				transformers);
 	}
 
 	@Bean
@@ -65,11 +70,11 @@ class OkHttpFeignLoadBalancerConfiguration {
 	@ConditionalOnProperty(value = "spring.cloud.loadbalancer.retry.enabled", havingValue = "true",
 			matchIfMissing = true)
 	public Client feignRetryClient(LoadBalancerClient loadBalancerClient, okhttp3.OkHttpClient okHttpClient,
-			LoadBalancedRetryFactory loadBalancedRetryFactory, LoadBalancerProperties properties,
-			LoadBalancerClientFactory loadBalancerClientFactory) {
+			LoadBalancedRetryFactory loadBalancedRetryFactory, LoadBalancerClientFactory loadBalancerClientFactory,
+			List<LoadBalancerFeignRequestTransformer> transformers) {
 		OkHttpClient delegate = new OkHttpClient(okHttpClient);
 		return new RetryableFeignBlockingLoadBalancerClient(delegate, loadBalancerClient, loadBalancedRetryFactory,
-				properties, loadBalancerClientFactory);
+				loadBalancerClientFactory, transformers);
 	}
 
 }

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2022 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.

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2022 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.
@@ -20,6 +20,7 @@ import java.io.IOException;
 import java.net.URI;
 import java.util.ArrayList;
 import java.util.Collection;
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -46,7 +47,6 @@ import org.springframework.cloud.client.loadbalancer.LoadBalancerLifecycleValida
 import org.springframework.cloud.client.loadbalancer.LoadBalancerProperties;
 import org.springframework.cloud.client.loadbalancer.ResponseData;
 import org.springframework.cloud.client.loadbalancer.RetryableRequestContext;
-import org.springframework.cloud.client.loadbalancer.RetryableStatusCodeException;
 import org.springframework.cloud.loadbalancer.support.LoadBalancerClientFactory;
 import org.springframework.http.HttpHeaders;
 import org.springframework.http.HttpMethod;
@@ -57,6 +57,7 @@ import org.springframework.retry.backoff.NoBackOffPolicy;
 import org.springframework.retry.policy.NeverRetryPolicy;
 import org.springframework.retry.support.RetryTemplate;
 import org.springframework.util.Assert;
+import org.springframework.util.StreamUtils;
 
 import static org.springframework.cloud.openfeign.loadbalancer.LoadBalancerUtils.buildRequestData;
 
@@ -65,12 +66,13 @@ import static org.springframework.cloud.openfeign.loadbalancer.LoadBalancerUtils
  * load-balanced with Spring Cloud LoadBalancer.
  *
  * @author Olga Maciaszek-Sharma
+ * @author changjin wei(魏昌进)
  * @since 2.2.6
  */
 @SuppressWarnings({ "rawtypes", "unchecked" })
 public class RetryableFeignBlockingLoadBalancerClient implements Client {
 
-	private static final Log LOG = LogFactory.getLog(FeignBlockingLoadBalancerClient.class);
+	private static final Log LOG = LogFactory.getLog(RetryableFeignBlockingLoadBalancerClient.class);
 
 	private final Client delegate;
 
@@ -78,18 +80,47 @@ public class RetryableFeignBlockingLoadBalancerClient implements Client {
 
 	private final LoadBalancedRetryFactory loadBalancedRetryFactory;
 
-	private final LoadBalancerProperties properties;
-
 	private final LoadBalancerClientFactory loadBalancerClientFactory;
 
+	private final List<LoadBalancerFeignRequestTransformer> transformers;
+
+	/**
+	 * @deprecated in favour of
+	 * {@link RetryableFeignBlockingLoadBalancerClient#RetryableFeignBlockingLoadBalancerClient(Client, LoadBalancerClient, LoadBalancedRetryFactory, LoadBalancerClientFactory, List)}
+	 */
+	@Deprecated
 	public RetryableFeignBlockingLoadBalancerClient(Client delegate, LoadBalancerClient loadBalancerClient,
 			LoadBalancedRetryFactory loadBalancedRetryFactory, LoadBalancerProperties properties,
 			LoadBalancerClientFactory loadBalancerClientFactory) {
 		this.delegate = delegate;
 		this.loadBalancerClient = loadBalancerClient;
 		this.loadBalancedRetryFactory = loadBalancedRetryFactory;
-		this.properties = properties;
 		this.loadBalancerClientFactory = loadBalancerClientFactory;
+		this.transformers = Collections.emptyList();
+	}
+
+	/**
+	 * @deprecated in favour of
+	 * {@link RetryableFeignBlockingLoadBalancerClient#RetryableFeignBlockingLoadBalancerClient(Client, LoadBalancerClient, LoadBalancedRetryFactory, LoadBalancerClientFactory, List)}
+	 */
+	@Deprecated
+	public RetryableFeignBlockingLoadBalancerClient(Client delegate, LoadBalancerClient loadBalancerClient,
+			LoadBalancedRetryFactory loadBalancedRetryFactory, LoadBalancerClientFactory loadBalancerClientFactory) {
+		this.delegate = delegate;
+		this.loadBalancerClient = loadBalancerClient;
+		this.loadBalancedRetryFactory = loadBalancedRetryFactory;
+		this.loadBalancerClientFactory = loadBalancerClientFactory;
+		this.transformers = Collections.emptyList();
+	}
+
+	public RetryableFeignBlockingLoadBalancerClient(Client delegate, LoadBalancerClient loadBalancerClient,
+			LoadBalancedRetryFactory loadBalancedRetryFactory, LoadBalancerClientFactory loadBalancerClientFactory,
+			List<LoadBalancerFeignRequestTransformer> transformers) {
+		this.delegate = delegate;
+		this.loadBalancerClient = loadBalancerClient;
+		this.loadBalancedRetryFactory = loadBalancedRetryFactory;
+		this.loadBalancerClientFactory = loadBalancerClientFactory;
+		this.transformers = transformers;
 	}
 
 	@Override
@@ -148,7 +179,7 @@ public class RetryableFeignBlockingLoadBalancerClient implements Client {
 					}
 					String reconstructedUrl = loadBalancerClient.reconstructURI(retrievedServiceInstance, originalUri)
 							.toString();
-					feignRequest = buildRequest(request, reconstructedUrl);
+					feignRequest = buildRequest(request, reconstructedUrl, retrievedServiceInstance);
 				}
 			}
 			org.springframework.cloud.client.loadbalancer.Response<ServiceInstance> lbResponse = new DefaultResponse(
@@ -161,8 +192,11 @@ public class RetryableFeignBlockingLoadBalancerClient implements Client {
 				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 RetryableStatusCodeException(serviceId, responseStatus, response, URI.create(request.url()));
+				throw new LoadBalancerResponseStatusCodeException(serviceId, response, byteArray,
+						URI.create(request.url()));
 			}
 			return response;
 		}, new LoadBalancedRecoveryCallback<Response, Response>() {
@@ -178,6 +212,16 @@ public class RetryableFeignBlockingLoadBalancerClient implements Client {
 				request.charset(), request.requestTemplate());
 	}
 
+	protected Request buildRequest(Request request, String reconstructedUrl, ServiceInstance instance) {
+		Request newRequest = buildRequest(request, reconstructedUrl);
+		if (transformers != null) {
+			for (LoadBalancerFeignRequestTransformer transformer : transformers) {
+				newRequest = transformer.transformRequest(newRequest, instance);
+			}
+		}
+		return newRequest;
+	}
+
 	private RetryTemplate buildRetryTemplate(String serviceId, Request request, LoadBalancedRetryPolicy retryPolicy) {
 		RetryTemplate retryTemplate = new RetryTemplate();
 		BackOffPolicy backOffPolicy = this.loadBalancedRetryFactory.createBackOffPolicy(serviceId);
@@ -229,6 +273,7 @@ public class RetryableFeignBlockingLoadBalancerClient implements Client {
 	}
 
 	private String getHint(String serviceId) {
+		LoadBalancerProperties properties = loadBalancerClientFactory.getProperties(serviceId);
 		String defaultHint = properties.getHint().getOrDefault("default", "default");
 		String hintPropertyValue = properties.getHint().get(serviceId);
 		return hintPropertyValue != null ? hintPropertyValue : defaultHint;

spring-cloud-openfeign-core/src/main/java/org/springframework/cloud/openfeign/security/OAuth2FeignRequestInterceptor.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2015-2019 the original author or authors.
+ * Copyright 2015-2022 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.
@@ -43,6 +43,7 @@ import org.springframework.security.oauth2.common.OAuth2AccessToken;
  * @author Tim Ysewyn
  * @since 3.0.0
  */
+@Deprecated // spring-security-oauth2 reached EOL
 public class OAuth2FeignRequestInterceptor implements RequestInterceptor {
 
 	/**

spring-cloud-openfeign-core/src/main/java/org/springframework/cloud/openfeign/security/OAuth2FeignRequestInterceptorBuilder.java

@@ -0,0 +1,81 @@
+/*
+ * Copyright 2015-2022 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.security;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+import org.springframework.http.client.ClientHttpRequestInterceptor;
+import org.springframework.security.oauth2.client.OAuth2ClientContext;
+import org.springframework.security.oauth2.client.resource.OAuth2ProtectedResourceDetails;
+import org.springframework.security.oauth2.client.token.AccessTokenProvider;
+import org.springframework.security.oauth2.client.token.AccessTokenProviderChain;
+import org.springframework.security.oauth2.client.token.OAuth2AccessTokenSupport;
+import org.springframework.security.oauth2.client.token.grant.client.ClientCredentialsAccessTokenProvider;
+import org.springframework.security.oauth2.client.token.grant.code.AuthorizationCodeAccessTokenProvider;
+import org.springframework.security.oauth2.client.token.grant.implicit.ImplicitAccessTokenProvider;
+import org.springframework.security.oauth2.client.token.grant.password.ResourceOwnerPasswordAccessTokenProvider;
+
+/**
+ * Allows to customize pre-defined {@link OAuth2FeignRequestInterceptor} using configurer
+ * beans of class {@link OAuth2FeignRequestInterceptorConfigurer}. Each configurer
+ * instance can add {@link AccessTokenProvider} new {@link ClientHttpRequestInterceptor}
+ * instances.
+ *
+ * @author Wojciech Mąka
+ * @since 3.1.1
+ */
+public class OAuth2FeignRequestInterceptorBuilder {
+
+	private AccessTokenProvider accessTokenProvider;
+
+	private final List<ClientHttpRequestInterceptor> accessTokenProviderInterceptors = new ArrayList<>();
+
+	public OAuth2FeignRequestInterceptorBuilder() {
+		accessTokenProvider = new AccessTokenProviderChain(Arrays.<AccessTokenProvider>asList(
+				new AuthorizationCodeAccessTokenProvider(), new ImplicitAccessTokenProvider(),
+				new ResourceOwnerPasswordAccessTokenProvider(), new ClientCredentialsAccessTokenProvider()));
+	}
+
+	public OAuth2FeignRequestInterceptorBuilder withAccessTokenProviderInterceptors(
+			ClientHttpRequestInterceptor... interceptors) {
+		accessTokenProviderInterceptors.addAll(Arrays.asList(interceptors));
+		return this;
+	}
+
+	OAuth2FeignRequestInterceptor build(OAuth2ClientContext oAuth2ClientContext,
+			OAuth2ProtectedResourceDetails resource) {
+		if (OAuth2AccessTokenSupport.class.isAssignableFrom(accessTokenProvider.getClass())) {
+			((OAuth2AccessTokenSupport) accessTokenProvider).setInterceptors(accessTokenProviderInterceptors);
+		}
+		final OAuth2FeignRequestInterceptor feignRequestInterceptor = new OAuth2FeignRequestInterceptor(
+				oAuth2ClientContext, resource);
+		feignRequestInterceptor.setAccessTokenProvider(accessTokenProvider);
+		return feignRequestInterceptor;
+	}
+
+	public static OAuth2FeignRequestInterceptor buildWithConfigurers(OAuth2ClientContext oAuth2ClientContext,
+			OAuth2ProtectedResourceDetails resource, List<OAuth2FeignRequestInterceptorConfigurer> buildConfigurers) {
+		final OAuth2FeignRequestInterceptorBuilder builder = new OAuth2FeignRequestInterceptorBuilder();
+		for (OAuth2FeignRequestInterceptorConfigurer configurer : buildConfigurers) {
+			configurer.customize(builder);
+		}
+		return builder.build(oAuth2ClientContext, resource);
+	}
+
+}

spring-cloud-openfeign-core/src/main/java/org/springframework/cloud/openfeign/security/OAuth2FeignRequestInterceptorConfigurer.java

@@ -0,0 +1,35 @@
+/*
+ * Copyright 2015-2022 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.security;
+
+import org.springframework.security.oauth2.client.token.AccessTokenProvider;
+
+/**
+ * Interface for configurer beans working with
+ * {@link OAuth2FeignRequestInterceptorBuilder} in order to provide custom interceptors
+ * for {@link AccessTokenProvider} managed internally by
+ * {@link OAuth2FeignRequestInterceptor}.
+ *
+ * @author Wojciech Mąka
+ * @since 3.1.1
+ */
+@FunctionalInterface
+public interface OAuth2FeignRequestInterceptorConfigurer {
+
+	void customize(OAuth2FeignRequestInterceptorBuilder requestInterceptorBuilder);
+
+}

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2022 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.

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

@@ -1,80 +0,0 @@
-/*
- * 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.io.BufferedReader;
-import java.io.IOException;
-import java.io.InputStreamReader;
-import java.lang.reflect.Type;
-import java.nio.charset.StandardCharsets;
-import java.util.Collection;
-import java.util.zip.GZIPInputStream;
-
-import feign.FeignException;
-import feign.Response;
-import feign.codec.Decoder;
-
-import org.springframework.cloud.openfeign.encoding.HttpEncoding;
-
-/**
- * When response is compressed as gzip, this decompresses and uses {@link SpringDecoder}
- * to decode.
- *
- * @author Jaesik Kim
- */
-public class DefaultGzipDecoder implements Decoder {
-
-	private Decoder decoder;
-
-	public DefaultGzipDecoder(Decoder decoder) {
-		this.decoder = decoder;
-	}
-
-	@Override
-	public Object decode(final Response response, Type type) throws IOException, FeignException {
-		Collection<String> encoding = response.headers().containsKey(HttpEncoding.CONTENT_ENCODING_HEADER)
-				? response.headers().get(HttpEncoding.CONTENT_ENCODING_HEADER) : null;
-
-		if (encoding != null) {
-			if (encoding.contains(HttpEncoding.GZIP_ENCODING)) {
-				String decompressedBody = decompress(response);
-				if (decompressedBody != null) {
-					Response decompressedResponse = response.toBuilder().body(decompressedBody.getBytes()).build();
-					return decoder.decode(decompressedResponse, type);
-				}
-			}
-		}
-		return decoder.decode(response, type);
-	}
-
-	private String decompress(Response response) throws IOException {
-		if (response.body() == null) {
-			return null;
-		}
-		try (GZIPInputStream gzipInputStream = new GZIPInputStream(response.body().asInputStream());
-				BufferedReader reader = new BufferedReader(
-						new InputStreamReader(gzipInputStream, StandardCharsets.UTF_8))) {
-			String outputString = "";
-			String line;
-			while ((line = reader.readLine()) != null) {
-				outputString += line;
-			}
-			return outputString;
-		}
-	}
-
-}

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

@@ -1,58 +0,0 @@
-/*
- * 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.codec.Decoder;
-import feign.optionals.OptionalDecoder;
-
-import org.springframework.beans.factory.ObjectFactory;
-import org.springframework.boot.autoconfigure.AutoConfigureAfter;
-import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
-import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
-import org.springframework.boot.autoconfigure.http.HttpMessageConverters;
-import org.springframework.cloud.openfeign.FeignAutoConfiguration;
-import org.springframework.context.annotation.Bean;
-import org.springframework.context.annotation.Configuration;
-
-/**
- * Configures Default Gzip Decoder.
- *
- * @author Jaesik Kim
- */
-@Configuration(proxyBeanMethods = false)
-@ConditionalOnProperty("feign.compression.response.enabled")
-// The OK HTTP client uses "transparent" compression.
-// If the accept-encoding header is present, it disables transparent compression
-@ConditionalOnMissingBean(type = "okhttp3.OkHttpClient")
-@AutoConfigureAfter(FeignAutoConfiguration.class)
-public class DefaultGzipDecoderConfiguration {
-
-	private ObjectFactory<HttpMessageConverters> messageConverters;
-
-	public DefaultGzipDecoderConfiguration(ObjectFactory<HttpMessageConverters> messageConverters) {
-		this.messageConverters = messageConverters;
-	}
-
-	@Bean
-	@ConditionalOnMissingBean
-	@ConditionalOnProperty("feign.compression.response.useGzipDecoder")
-	public Decoder defaultGzipDecoder() {
-		return new OptionalDecoder(
-				new ResponseEntityDecoder(new DefaultGzipDecoder(new SpringDecoder(messageConverters))));
-	}
-
-}

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

@@ -0,0 +1,54 @@
+/*
+ * Copyright 2013-2022 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.function.Consumer;
+
+import org.springframework.beans.BeansException;
+import org.springframework.beans.factory.ObjectProvider;
+
+/**
+ * @author Olga Maciaszek-Sharma
+ */
+class EmptyObjectProvider<T> implements ObjectProvider<T> {
+
+	@Override
+	public T getObject(Object... args) throws BeansException {
+		return null;
+	}
+
+	@Override
+	public T getIfAvailable() throws BeansException {
+		return null;
+	}
+
+	@Override
+	public T getIfUnique() throws BeansException {
+		return null;
+	}
+
+	@Override
+	public T getObject() throws BeansException {
+		return null;
+	}
+
+	@Override
+	public void forEach(Consumer action) {
+		// do nothing
+	}
+
+}

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

@@ -0,0 +1,44 @@
+/*
+ * Copyright 2013-2022 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("spring.cloud.openfeign.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 2013-2022 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.
@@ -16,14 +16,19 @@
 
 package org.springframework.cloud.openfeign.support;
 
+import java.time.Duration;
 import java.util.concurrent.TimeUnit;
 
+import feign.okhttp.OkHttpClient;
+
 import org.springframework.boot.context.properties.ConfigurationProperties;
 
 /**
  * @author Ryan Baxter
+ * @author Nguyen Ky Thanh
+ * @author Olga Maciaszek-Sharma
  */
-@ConfigurationProperties(prefix = "feign.httpclient")
+@ConfigurationProperties(prefix = "spring.cloud.openfeign.httpclient")
 public class FeignHttpClientProperties {
 
 	/**
@@ -82,8 +87,18 @@ public class FeignHttpClientProperties {
 
 	private int connectionTimerRepeat = DEFAULT_CONNECTION_TIMER_REPEAT;
 
+	/**
+	 * Apache HttpClient5 additional properties.
+	 */
+	private Hc5Properties hc5 = new Hc5Properties();
+
+	/**
+	 * Additional {@link OkHttpClient}-specific properties.
+	 */
+	private OkHttp okHttp = new OkHttp();
+
 	public int getConnectionTimerRepeat() {
-		return this.connectionTimerRepeat;
+		return connectionTimerRepeat;
 	}
 
 	public void setConnectionTimerRepeat(int connectionTimerRepeat) {
@@ -91,7 +106,7 @@ public class FeignHttpClientProperties {
 	}
 
 	public boolean isDisableSslValidation() {
-		return this.disableSslValidation;
+		return disableSslValidation;
 	}
 
 	public void setDisableSslValidation(boolean disableSslValidation) {
@@ -99,7 +114,7 @@ public class FeignHttpClientProperties {
 	}
 
 	public int getMaxConnections() {
-		return this.maxConnections;
+		return maxConnections;
 	}
 
 	public void setMaxConnections(int maxConnections) {
@@ -107,7 +122,7 @@ public class FeignHttpClientProperties {
 	}
 
 	public int getMaxConnectionsPerRoute() {
-		return this.maxConnectionsPerRoute;
+		return maxConnectionsPerRoute;
 	}
 
 	public void setMaxConnectionsPerRoute(int maxConnectionsPerRoute) {
@@ -115,7 +130,7 @@ public class FeignHttpClientProperties {
 	}
 
 	public long getTimeToLive() {
-		return this.timeToLive;
+		return timeToLive;
 	}
 
 	public void setTimeToLive(long timeToLive) {
@@ -123,7 +138,7 @@ public class FeignHttpClientProperties {
 	}
 
 	public TimeUnit getTimeToLiveUnit() {
-		return this.timeToLiveUnit;
+		return timeToLiveUnit;
 	}
 
 	public void setTimeToLiveUnit(TimeUnit timeToLiveUnit) {
@@ -131,7 +146,7 @@ public class FeignHttpClientProperties {
 	}
 
 	public boolean isFollowRedirects() {
-		return this.followRedirects;
+		return followRedirects;
 	}
 
 	public void setFollowRedirects(boolean followRedirects) {
@@ -139,11 +154,159 @@ public class FeignHttpClientProperties {
 	}
 
 	public int getConnectionTimeout() {
-		return this.connectionTimeout;
+		return connectionTimeout;
 	}
 
 	public void setConnectionTimeout(int connectionTimeout) {
 		this.connectionTimeout = connectionTimeout;
 	}
 
+	public Hc5Properties getHc5() {
+		return hc5;
+	}
+
+	public void setHc5(Hc5Properties hc5) {
+		this.hc5 = hc5;
+	}
+
+	public OkHttp getOkHttp() {
+		return okHttp;
+	}
+
+	public void setOkHttp(OkHttp okHttp) {
+		this.okHttp = okHttp;
+	}
+
+	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 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
+
+		}
+
+	}
+
+	/**
+	 * {@link OkHttpClient}-specific properties.
+	 */
+	public static class OkHttp {
+
+		/**
+		 * {@link OkHttpClient} read timeout; defaults to 60 seconds.
+		 */
+		private Duration readTimeout = Duration.ofSeconds(60);
+
+		public Duration getReadTimeout() {
+			return readTimeout;
+		}
+
+		public void setReadTimeout(Duration readTimeout) {
+			this.readTimeout = readTimeout;
+		}
+
+	}
+
 }

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2022 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.

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

@@ -0,0 +1,33 @@
+/*
+ * Copyright 2016-2022 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.List;
+import java.util.function.Consumer;
+
+import org.springframework.http.converter.HttpMessageConverter;
+
+/**
+ * Allows customising {@link HttpMessageConverter} objects passed via {@link Consumer}
+ * parameter.
+ *
+ * @author Olga Maciaszek-Sharma
+ * @since 3.1.0
+ */
+public interface HttpMessageConverterCustomizer extends Consumer<List<HttpMessageConverter<?>>> {
+
+}

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2022 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.

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2022 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.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.JsonIgnoreProperties;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.core.Version;
 import com.fasterxml.jackson.databind.Module;
@@ -36,6 +38,9 @@ import org.springframework.data.domain.Sort;
  * This Jackson module provides support to deserialize Spring {@link Page} objects.
  *
  * @author Pascal Büttiker
+ * @author Olga Maciaszek-Sharma
+ * @author Pedro Mendes
+ * @author Nikita Konev
  */
 public class PageJacksonModule extends Module {
 
@@ -55,6 +60,7 @@ public class PageJacksonModule extends Module {
 	}
 
 	@JsonDeserialize(as = SimplePageImpl.class)
+	@JsonIgnoreProperties(ignoreUnknown = true)
 	private interface PageMixIn {
 
 	}
@@ -64,17 +70,22 @@ public class PageJacksonModule extends Module {
 		private final Page<T> delegate;
 
 		SimplePageImpl(@JsonProperty("content") List<T> content, @JsonProperty("number") int number,
-				@JsonProperty("size") int size, @JsonProperty("totalElements") long totalElements,
+				@JsonProperty("size") int size, @JsonProperty("totalElements") @JsonAlias({ "total-elements",
+						"total_elements", "totalelements", "TotalElements" }) long totalElements,
 				@JsonProperty("sort") Sort sort) {
-			PageRequest pageRequest;
-			if (sort != null) {
-				pageRequest = PageRequest.of(number, size, sort);
+			if (size > 0) {
+				PageRequest pageRequest;
+				if (sort != null) {
+					pageRequest = PageRequest.of(number, size, sort);
+				}
+				else {
+					pageRequest = PageRequest.of(number, size);
+				}
+				delegate = new PageImpl<>(content, pageRequest, totalElements);
 			}
 			else {
-				pageRequest = PageRequest.of(number, size);
+				delegate = new PageImpl<>(content);
 			}
-			delegate = new PageImpl<>(content, pageRequest, totalElements);
-
 		}
 
 		@JsonProperty
@@ -173,6 +184,33 @@ public class PageJacksonModule extends Module {
 			return delegate.iterator();
 		}
 
+		@JsonIgnore
+		@Override
+		public Pageable getPageable() {
+			return delegate.getPageable();
+		}
+
+		@JsonIgnore
+		@Override
+		public boolean isEmpty() {
+			return delegate.isEmpty();
+		}
+
+		@Override
+		public int hashCode() {
+			return delegate.hashCode();
+		}
+
+		@Override
+		public boolean equals(Object obj) {
+			return delegate.equals(obj);
+		}
+
+		@Override
+		public String toString() {
+			return delegate.toString();
+		}
+
 	}
 
 }

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2022 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.
@@ -32,6 +32,7 @@ import org.springframework.data.domain.Sort;
  * Provides support for encoding spring Pageable via composition.
  *
  * @author Pascal Büttiker
+ * @author Yanming Zhou
  */
 public class PageableSpringEncoder implements Encoder {
 
@@ -82,8 +83,8 @@ public class PageableSpringEncoder implements Encoder {
 				Pageable pageable = (Pageable) object;
 
 				if (pageable.isPaged()) {
-					template.query(pageParameter, pageable.getPageNumber() + "");
-					template.query(sizeParameter, pageable.getPageSize() + "");
+					template.query(pageParameter, String.valueOf(pageable.getPageNumber()));
+					template.query(sizeParameter, String.valueOf(pageable.getPageSize()));
 				}
 
 				if (pageable.getSort() != null) {
@@ -116,7 +117,7 @@ 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 +1,108 @@
+/*
+ * Copyright 2013-2022 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
+ * @author Yanming Zhou
+ * @since 2.2.8
+ */
+public class PageableSpringQueryMapEncoder extends BeanQueryMapEncoder {
+
+	/**
+	 * Page index parameter name.
+	 */
+	private String pageParameter = "page";
+
+	/**
+	 * Page size parameter name.
+	 */
+	private String sizeParameter = "size";
+
+	/**
+	 * Sort parameter name.
+	 */
+	private String sortParameter = "sort";
+
+	public void setPageParameter(String pageParameter) {
+		this.pageParameter = pageParameter;
+	}
+
+	public void setSizeParameter(String sizeParameter) {
+		this.sizeParameter = sizeParameter;
+	}
+
+	public void setSortParameter(String sortParameter) {
+		this.sortParameter = sortParameter;
+	}
+
+	@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(pageParameter, pageable.getPageNumber());
+					queryMap.put(sizeParameter, 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(sortParameter, 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 2013-2022 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 {
 
@@ -80,7 +80,7 @@ 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/SortJacksonModule.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2022 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.

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2022 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.

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2022 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.
@@ -21,6 +21,7 @@ import java.io.InputStream;
 import java.lang.reflect.ParameterizedType;
 import java.lang.reflect.Type;
 import java.lang.reflect.WildcardType;
+import java.util.List;
 
 import feign.FeignException;
 import feign.Response;
@@ -28,31 +29,48 @@ import feign.codec.DecodeException;
 import feign.codec.Decoder;
 
 import org.springframework.beans.factory.ObjectFactory;
+import org.springframework.beans.factory.ObjectProvider;
 import org.springframework.boot.autoconfigure.http.HttpMessageConverters;
 import org.springframework.http.HttpHeaders;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.client.ClientHttpResponse;
+import org.springframework.http.converter.HttpMessageConverter;
 import org.springframework.web.client.HttpMessageConverterExtractor;
 
 import static org.springframework.cloud.openfeign.support.FeignUtils.getHttpHeaders;
 
 /**
  * @author Spencer Gibb
+ * @author Olga Maciaszek-Sharma
  */
 public class SpringDecoder implements Decoder {
 
-	private ObjectFactory<HttpMessageConverters> messageConverters;
+	private final ObjectFactory<HttpMessageConverters> messageConverters;
 
+	private final ObjectProvider<HttpMessageConverterCustomizer> customizers;
+
+	/**
+	 * @deprecated in favour of
+	 * {@link SpringDecoder#SpringDecoder(ObjectFactory, ObjectProvider)}
+	 */
+	@Deprecated
 	public SpringDecoder(ObjectFactory<HttpMessageConverters> messageConverters) {
+		this(messageConverters, new EmptyObjectProvider<>());
+	}
+
+	public SpringDecoder(ObjectFactory<HttpMessageConverters> messageConverters,
+			ObjectProvider<HttpMessageConverterCustomizer> customizers) {
 		this.messageConverters = messageConverters;
+		this.customizers = customizers;
 	}
 
 	@Override
 	public Object decode(final Response response, Type type) throws IOException, FeignException {
 		if (type instanceof Class || type instanceof ParameterizedType || type instanceof WildcardType) {
+			List<HttpMessageConverter<?>> converters = messageConverters.getObject().getConverters();
+			customizers.forEach(customizer -> customizer.accept(converters));
 			@SuppressWarnings({ "unchecked", "rawtypes" })
-			HttpMessageConverterExtractor<?> extractor = new HttpMessageConverterExtractor(type,
-					this.messageConverters.getObject().getConverters());
+			HttpMessageConverterExtractor<?> extractor = new HttpMessageConverterExtractor(type, converters);
 
 			return extractor.extractData(new FeignResponseAdapter(response));
 		}
@@ -70,23 +88,23 @@ public class SpringDecoder implements Decoder {
 
 		@Override
 		public HttpStatus getStatusCode() throws IOException {
-			return HttpStatus.valueOf(this.response.status());
+			return HttpStatus.valueOf(response.status());
 		}
 
 		@Override
 		public int getRawStatusCode() throws IOException {
-			return this.response.status();
+			return response.status();
 		}
 
 		@Override
 		public String getStatusText() throws IOException {
-			return this.response.reason();
+			return response.reason();
 		}
 
 		@Override
 		public void close() {
 			try {
-				this.response.body().close();
+				response.body().close();
 			}
 			catch (IOException ex) {
 				// Ignore exception on close...
@@ -95,12 +113,12 @@ public class SpringDecoder implements Decoder {
 
 		@Override
 		public InputStream getBody() throws IOException {
-			return this.response.body().asInputStream();
+			return response.body().asInputStream();
 		}
 
 		@Override
 		public HttpHeaders getHeaders() {
-			return getHttpHeaders(this.response.headers());
+			return getHttpHeaders(response.headers());
 		}
 
 	}

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 2013-2022 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 +22,12 @@ 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.List;
 import java.util.Objects;
+import java.util.stream.Stream;
 
-import feign.Request;
 import feign.RequestTemplate;
 import feign.codec.EncodeException;
 import feign.codec.Encoder;
@@ -34,6 +36,7 @@ import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 
 import org.springframework.beans.factory.ObjectFactory;
+import org.springframework.beans.factory.ObjectProvider;
 import org.springframework.boot.autoconfigure.http.HttpMessageConverters;
 import org.springframework.cloud.openfeign.encoding.HttpEncoding;
 import org.springframework.http.HttpHeaders;
@@ -48,6 +51,10 @@ 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 +62,10 @@ 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);
@@ -64,14 +74,39 @@ public class SpringEncoder implements Encoder {
 
 	private final ObjectFactory<HttpMessageConverters> messageConverters;
 
+	private final FeignEncoderProperties encoderProperties;
+
+	private final ObjectProvider<HttpMessageConverterCustomizer> customizers;
+
 	public SpringEncoder(ObjectFactory<HttpMessageConverters> messageConverters) {
-		this.springFormEncoder = new SpringFormEncoder();
-		this.messageConverters = messageConverters;
+		this(new SpringFormEncoder(), messageConverters);
 	}
 
+	/**
+	 * @deprecated in favour of
+	 * {@link SpringEncoder#SpringEncoder(SpringFormEncoder, ObjectFactory, FeignEncoderProperties, ObjectProvider)}
+	 */
+	@Deprecated
 	public SpringEncoder(SpringFormEncoder springFormEncoder, ObjectFactory<HttpMessageConverters> messageConverters) {
+		this(springFormEncoder, messageConverters, new FeignEncoderProperties());
+	}
+
+	/**
+	 * @deprecated in favour of
+	 * {@link SpringEncoder#SpringEncoder(SpringFormEncoder, ObjectFactory, FeignEncoderProperties, ObjectProvider)}
+	 */
+	@Deprecated
+	public SpringEncoder(SpringFormEncoder springFormEncoder, ObjectFactory<HttpMessageConverters> messageConverters,
+			FeignEncoderProperties encoderProperties) {
+		this(springFormEncoder, messageConverters, encoderProperties, new EmptyObjectProvider<>());
+	}
+
+	public SpringEncoder(SpringFormEncoder springFormEncoder, ObjectFactory<HttpMessageConverters> messageConverters,
+			FeignEncoderProperties encoderProperties, ObjectProvider<HttpMessageConverterCustomizer> customizers) {
 		this.springFormEncoder = springFormEncoder;
 		this.messageConverters = messageConverters;
+		this.encoderProperties = encoderProperties;
+		this.customizers = customizers;
 	}
 
 	@Override
@@ -86,8 +121,8 @@ public class SpringEncoder implements Encoder {
 				requestContentType = MediaType.valueOf(type);
 			}
 
-			if (Objects.equals(requestContentType, MediaType.MULTIPART_FORM_DATA)) {
-				this.springFormEncoder.encode(requestBody, bodyType, request);
+			if (isFormRelatedContentType(requestContentType)) {
+				springFormEncoder.encode(requestBody, bodyType, request);
 				return;
 			}
 			else {
@@ -96,54 +131,69 @@ public class SpringEncoder implements Encoder {
 							+ "should be specified as MediaType.MULTIPART_FORM_DATA_VALUE");
 				}
 			}
-
-			for (HttpMessageConverter messageConverter : this.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;
-					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);
+			encodeWithMessageConverter(requestBody, bodyType, request, requestContentType);
 		}
 	}
 
+	private void encodeWithMessageConverter(Object requestBody, Type bodyType, RequestTemplate request,
+			MediaType requestContentType) {
+		List<HttpMessageConverter<?>> converters = messageConverters.getObject().getConverters();
+		customizers.forEach(customizer -> customizer.accept(converters));
+		for (HttpMessageConverter messageConverter : converters) {
+			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 {
@@ -185,6 +235,26 @@ 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);
+	}
+
+	protected 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();
@@ -192,21 +262,21 @@ 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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2020 the original author or authors.
+ * Copyright 2013-2022 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.
@@ -35,9 +35,12 @@ 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;
+import org.springframework.cloud.openfeign.annotation.CookieValueParameterProcessor;
 import org.springframework.cloud.openfeign.annotation.MatrixVariableParameterProcessor;
 import org.springframework.cloud.openfeign.annotation.PathVariableParameterProcessor;
 import org.springframework.cloud.openfeign.annotation.QueryMapParameterProcessor;
@@ -79,9 +82,12 @@ import static org.springframework.core.annotation.AnnotatedElementUtils.findMerg
  * @author Artyom Romanenko
  * @author Darren Foong
  * @author Ram Anaswara
+ * @author Sam Kruglov
  */
 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";
@@ -169,47 +175,22 @@ public class SpringMvcContract extends Contract.BaseContract implements Resource
 
 	@Override
 	protected void processAnnotationOnClass(MethodMetadata data, Class<?> clz) {
-		if (clz.getInterfaces().length == 0) {
-			RequestMapping classAnnotation = findMergedAnnotation(clz, RequestMapping.class);
-			if (classAnnotation != null) {
-				// Prepend path from class annotation if specified
-				if (classAnnotation.value().length > 0) {
-					String pathValue = emptyToNull(classAnnotation.value()[0]);
-					pathValue = resolve(pathValue);
-					if (!pathValue.startsWith("/")) {
-						pathValue = "/" + pathValue;
-					}
-					data.template().uri(pathValue);
-					if (data.template().decodeSlash() != decodeSlash) {
-						data.template().decodeSlash(decodeSlash);
-					}
-				}
-			}
+		RequestMapping classAnnotation = findMergedAnnotation(clz, RequestMapping.class);
+		if (classAnnotation != null) {
+			LOG.error("Cannot process class: " + clz.getName()
+					+ ". @RequestMapping annotation is not allowed on @FeignClient interfaces.");
+			throw new IllegalArgumentException("@RequestMapping annotation not allowed on @FeignClient interfaces");
+		}
+		CollectionFormat collectionFormat = findMergedAnnotation(clz, CollectionFormat.class);
+		if (collectionFormat != null) {
+			data.template().collectionFormat(collectionFormat.value());
 		}
 	}
 
 	@Override
 	public MethodMetadata parseAndValidateMetadata(Class<?> targetType, Method method) {
 		processedMethods.put(Feign.configKey(targetType, method), method);
-		MethodMetadata md = 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;
+		return super.parseAndValidateMetadata(targetType, method);
 	}
 
 	@Override
@@ -360,6 +341,7 @@ public class SpringMvcContract extends Contract.BaseContract implements Resource
 		annotatedArgumentResolvers.add(new RequestHeaderParameterProcessor());
 		annotatedArgumentResolvers.add(new QueryMapParameterProcessor());
 		annotatedArgumentResolvers.add(new RequestPartParameterProcessor());
+		annotatedArgumentResolvers.add(new CookieValueParameterProcessor());
 
 		return annotatedArgumentResolvers;
 	}