Update SNAPSHOT to 4.3.2

Use own connectionprovider and loopresources for WebClient

.github/CONTRIBUTING.md

@@ -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/main/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/modules/ROOT/partials/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

.github/dco.yml

@@ -0,0 +1,2 @@
+require:
+  members: false

.github/dependabot.yml

@@ -0,0 +1,69 @@
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    target-branch: "4.1.x" # oldest OSS supported branch
+    schedule:
+      interval: "weekly"
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    target-branch: "4.2.x"
+    schedule:
+      interval: "weekly"
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    target-branch: "main"
+    schedule:
+      interval: "weekly"
+  - package-ecosystem: maven
+    directory: /
+    schedule:
+      interval: daily
+    target-branch: 4.1.x
+    ignore:
+      # only upgrade patch versions for maintenance branch
+      - dependency-name: "*"
+        update-types:
+          - version-update:semver-major
+          - version-update:semver-minor
+  - package-ecosystem: maven
+    directory: /
+    schedule:
+      interval: daily
+    target-branch: 4.2.x
+    ignore:
+      # only upgrade patch versions for maintenance branch
+      - dependency-name: "*"
+        update-types:
+          - version-update:semver-major
+          - version-update:semver-minor
+  - package-ecosystem: maven
+    directory: /
+    schedule:
+      interval: daily
+    target-branch: main
+    ignore:
+      # only upgrade by minor or patch
+      - dependency-name: "*"
+        update-types:
+          - version-update:semver-major
+  - package-ecosystem: npm
+    target-branch: docs-build
+    directory: /
+    schedule:
+      interval: weekly
+  - package-ecosystem: npm
+    target-branch: main
+    directory: /docs
+    schedule:
+      interval: weekly
+  - package-ecosystem: npm
+    target-branch: 4.1.x
+    directory: /docs
+    schedule:
+      interval: weekly
+  - package-ecosystem: npm
+    target-branch: 4.2.x
+    directory: /docs
+    schedule:
+      interval: weekly

.github/workflows/ci.yaml

@@ -0,0 +1,32 @@
+name: Spring Cloud Netflix CI Job
+
+on:
+  push:
+    branches:
+      - 4.3.x
+
+  # Scheduled builds run daily at midnight UTC
+  schedule:
+    - cron: '0 0 * * *'
+
+  # Manual trigger with optional branch override
+  workflow_dispatch:
+    inputs:
+      branches:
+        description: "Which branch should be built (can be a comma-separated list of branches)"
+        required: true
+        default: '4.3.x'
+        type: string
+
+jobs:
+  deploy:
+    uses: spring-cloud/spring-cloud-github-actions/.github/workflows/deploy.yml@main
+    with:
+      branches: ${{ inputs.branches }}
+    secrets:
+      ARTIFACTORY_USERNAME: ${{ secrets.ARTIFACTORY_USERNAME }}
+      ARTIFACTORY_PASSWORD: ${{ secrets.ARTIFACTORY_PASSWORD }}
+      COMMERCIAL_ARTIFACTORY_USERNAME: ${{ secrets.COMMERCIAL_ARTIFACTORY_USERNAME }}
+      COMMERCIAL_ARTIFACTORY_PASSWORD: ${{ secrets.COMMERCIAL_ARTIFACTORY_PASSWORD }}
+      DOCKERHUB_USERNAME: ${{ secrets.DOCKERHUB_USERNAME }}
+      DOCKERHUB_TOKEN: ${{ secrets.DOCKERHUB_TOKEN }}

.github/workflows/deploy-docs.yml

@@ -0,0 +1,32 @@
+name: Deploy Docs
+on:
+  push:
+    branches-ignore: [ gh-pages ]
+    tags: '**'
+  repository_dispatch:
+    types: request-build-reference # legacy
+  #schedule:
+  #- cron: '0 10 * * *' # Once per day at 10am UTC
+  workflow_dispatch:
+permissions:
+  actions: write
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    # if: github.repository_owner == 'spring-cloud'
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+        with:
+          ref: docs-build
+          fetch-depth: 1
+      - name: Dispatch (partial build)
+        if: github.ref_type == 'branch'
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: gh workflow run deploy-docs.yml -r $(git rev-parse --abbrev-ref HEAD) -f build-refname=${{ github.ref_name }}
+      - name: Dispatch (full build)
+        if: github.ref_type == 'tag'
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: gh workflow run deploy-docs.yml -r $(git rev-parse --abbrev-ref HEAD)

.github/workflows/maven.yml

@@ -4,10 +4,8 @@
 name: Build
 
 on:
-  push:
-    branches: [ 4.0.x ]
   pull_request:
-    branches: [ 4.0.x ]
+    branches: [ main, 4.3.x, 4.2.x ]
 
 jobs:
   build:
@@ -19,15 +17,15 @@ jobs:
         java: ["17"]
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Set up JDK ${{ matrix.java }}
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@v5
         with:
-          distribution: 'zulu'
+          distribution: 'temurin'
           java-version: ${{ matrix.java }}
           cache: 'maven'
       - name: Build with Maven
         run: ./mvnw clean install -B -U -P sonar
-      - uses: codecov/codecov-action@v3
+      - uses: codecov/codecov-action@v6
         with:
           fail_ci_if_error: false

.gitignore

@@ -1,3 +1,6 @@
+/application.yml
+/application.properties
+asciidoctor.css
 *~
 #*
 *#
@@ -5,6 +8,7 @@
 .classpath
 .project
 .settings/
+.settings
 .springBeans
 target/
 bin/
@@ -18,5 +22,16 @@ _site/
 .shelf
 *.swp
 *.swo
+/spring-cloud-release-tools*.jar
+antrun
 .vscode/
 .flattened-pom.xml
+node
+node_modules
+build
+_configprops.adoc
+_spans.adoc
+_metrics.adoc
+_conventions.adoc
+/package.json
+package-lock.json

.mvn/maven.config

@@ -1 +1,2 @@
--DaltSnapshotDeploymentRepository=repo.spring.io::default::https://repo.spring.io/libs-snapshot-local -P spring
+-DaltSnapshotDeploymentRepository=repo.spring.io::default::https://repo.spring.io/libs-snapshot-local
+-P spring

.mvn/wrapper/MavenWrapperDownloader.java

@@ -1,107 +0,0 @@
-/*
-Licensed to the Apache Software Foundation (ASF) under one
-or more contributor license agreements.  See the NOTICE file
-distributed with this work for additional information
-regarding copyright ownership.  The ASF licenses this file
-to you 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.
-*/
-
-import java.util.Properties;
-
-public class MavenWrapperDownloader {
-
-    /**
-     * Default URL to download the maven-wrapper.jar from, if no 'downloadUrl' is provided.
-     */
-    private static final String DEFAULT_DOWNLOAD_URL =
-            "https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.4.0/maven-wrapper-0.4.0.jar";
-
-    /**
-     * Path to the maven-wrapper.properties file, which might contain a downloadUrl property to
-     * use instead of the default one.
-     */
-    private static final String MAVEN_WRAPPER_PROPERTIES_PATH =
-            ".mvn/wrapper/maven-wrapper.properties";
-
-    /**
-     * Path where the maven-wrapper.jar will be saved to.
-     */
-    private static final String MAVEN_WRAPPER_JAR_PATH =
-            ".mvn/wrapper/maven-wrapper.jar";
-
-    /**
-     * Name of the property which should be used to override the default download url for the wrapper.
-     */
-    private static final String PROPERTY_NAME_WRAPPER_URL = "wrapperUrl";
-
-    public static void main(String args[]) {
-        System.out.println("- Downloader started");
-        File baseDirectory = new File(args[0]);
-        System.out.println("- Using base directory: " + baseDirectory.getAbsolutePath());
-
-        // If the maven-wrapper.properties exists, read it and check if it contains a custom
-        // wrapperUrl parameter.
-        File mavenWrapperPropertyFile = new File(baseDirectory, MAVEN_WRAPPER_PROPERTIES_PATH);
-        String url = DEFAULT_DOWNLOAD_URL;
-        if(mavenWrapperPropertyFile.exists()) {
-            FileInputStream mavenWrapperPropertyFileInputStream = null;
-            try {
-                mavenWrapperPropertyFileInputStream = new FileInputStream(mavenWrapperPropertyFile);
-                Properties mavenWrapperProperties = new Properties();
-                mavenWrapperProperties.load(mavenWrapperPropertyFileInputStream);
-                url = mavenWrapperProperties.getProperty(PROPERTY_NAME_WRAPPER_URL, url);
-            } catch (IOException e) {
-                System.out.println("- ERROR loading '" + MAVEN_WRAPPER_PROPERTIES_PATH + "'");
-            } finally {
-                try {
-                    if(mavenWrapperPropertyFileInputStream != null) {
-                        mavenWrapperPropertyFileInputStream.close();
-                    }
-                } catch (IOException e) {
-                    // Ignore ...
-                }
-            }
-        }
-        System.out.println("- Downloading from: : " + url);
-
-        File outputFile = new File(baseDirectory.getAbsolutePath(), MAVEN_WRAPPER_JAR_PATH);
-        if(!outputFile.getParentFile().exists()) {
-            if(!outputFile.getParentFile().mkdirs()) {
-                System.out.println(
-                        "- ERROR creating output direcrory '" + outputFile.getParentFile().getAbsolutePath() + "'");
-            }
-        }
-        System.out.println("- Downloading to: " + outputFile.getAbsolutePath());
-        try {
-            downloadFileFromURL(url, outputFile);
-            System.out.println("Done");
-            System.exit(0);
-        } catch (Throwable e) {
-            System.out.println("- Error downloading");
-            e.printStackTrace();
-            System.exit(1);
-        }
-    }
-
-    private static void downloadFileFromURL(String urlString, File destination) throws Exception {
-        URL website = new URL(urlString);
-        ReadableByteChannel rbc;
-        rbc = Channels.newChannel(website.openStream());
-        FileOutputStream fos = new FileOutputStream(destination);
-        fos.getChannel().transferFrom(rbc, 0, Long.MAX_VALUE);
-        fos.close();
-        rbc.close();
-    }
-
-}

.mvn/wrapper/maven-wrapper.properties

@@ -1 +1,18 @@
-distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.5.2/apache-maven-3.5.2-bin.zip
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you 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
+#
+#   http://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.
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.9.4/apache-maven-3.9.4-bin.zip
+wrapperUrl=https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.2.0/maven-wrapper-3.2.0.jar

README.adoc

@@ -5,55 +5,20 @@ Edit the files in the src/main/asciidoc/ directory instead.
 ////
 
 
-:doctype: book
-:idprefix:
-:idseparator: -
-:toc: left
-:toclevels: 4
-:tabsize: 4
-:numbered:
-:sectanchors:
-:sectnums:
-:icons: font
-:hide-uri-scheme:
-:docinfo: shared,private
 
-:sc-ext: java
-:project-full-name: Spring Cloud Netflix
+image::https://github.com/spring-cloud/spring-cloud-netflix/actions/workflows/maven.yml/badge.svg?branch=main&style=svg["Build",link="https://github.com/spring-cloud/spring-cloud-netflix/actions/workflows/maven.yml"]
 
-image::https://github.com/spring-cloud/spring-cloud-netflix/actions/workflows/maven.yml/badge.svg?branch=4.0.x&style=svg["Build",link="https://github.com/spring-cloud/spring-cloud-netflix/actions/workflows/maven.yml"]
-
-image:https://codecov.io/gh/spring-cloud/spring-cloud-netflix/branch/4.0.x/graph/badge.svg["Codecov", link="https://app.codecov.io/gh/spring-cloud/spring-cloud-netflix/tree/4.0.x"]
-
-:doctype: book
-:idprefix:
-:idseparator: -
-:toc: left
-:toclevels: 4
-:tabsize: 4
-:numbered:
-:sectanchors:
-:sectnums:
-:icons: font
-:hide-uri-scheme:
-:docinfo: shared,private
-
-:sc-ext: java
-:project-full-name: Spring Cloud Netflix
-
-This project provides Netflix OSS integrations for Spring Boot apps through autoconfiguration
-and binding to the Spring Environment and other Spring programming model idioms. With a few
-simple annotations you can quickly enable and configure the common patterns inside your
-application and build large distributed systems with battle-tested Netflix components. The
-patterns provided include Service Discovery (Eureka).
+image:https://codecov.io/gh/spring-cloud/spring-cloud-netflix/branch/main/graph/badge.svg["Codecov", link="https://app.codecov.io/gh/spring-cloud/spring-cloud-netflix/tree/main"]
 
 
+[[features]]
 == Features
 
 * Service Discovery: Eureka instances can be registered and clients can discover the instances using Spring-managed beans
 * Service Discovery: an embedded Eureka server can be created with declarative Java configuration
 
 
+[[building]]
 == Building
 
 :jdkversion: 17
@@ -84,7 +49,7 @@ build succeed, please raise a ticket to get the settings added to
 source control.
 
 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.
+require that a local instance of https://www.docker.com/get-started[Docker] is installed and running.
 
 [[documentation]]
 == Documentation
@@ -103,7 +68,7 @@ a modified file in the correct place. Just commit it and push the change.
 [[working-with-the-code]]
 == Working with the code
 If you don't have an IDE preference we would recommend that you use
-https://www.springsource.com/developer/sts[Spring Tools Suite] or
+https://spring.io/tools[Spring Tools Suite] or
 https://eclipse.org[Eclipse] when working with the code. We use the
 https://eclipse.org/m2e/[m2eclipse] eclipse plugin for maven support. Other IDEs and tools
 should also work without issue as long as they use Maven 3.3.3 or better.
@@ -146,10 +111,12 @@ from the `file` menu.
 NOTE:  To build the module `spring-cloud-netflix-hystrix-contract` along with the entire Netflix project run the
 `build.sh` script in the `scripts` directory.
 
+[[contributing]]
 == Contributing
 
 NOTE: Spring Cloud is released under the non-restrictive Apache 2.0 license. If you would like to contribute to this section of the documentation or if you find an error, please find the source code and issue trackers in the project at {github-project}[github].
 
+[[license]]
 == License
 
 The project license file is available https://raw.githubusercontent.com/spring-cloud/spring-cloud-netflix/main/LICENSE.txt[here].

docs/antora-playbook.yml

@@ -0,0 +1,33 @@
+antora:
+  extensions:
+    - require: '@springio/antora-extensions'
+      root_component_name: 'cloud-netflix'
+site:
+  title: Spring Cloud Netflix
+  url: https://docs.spring.io/spring-cloud-netflix/reference/
+content:
+  sources:
+    - url: ./..
+      branches: HEAD
+      start_path: docs
+      worktrees: true
+asciidoc:
+  attributes:
+    page-stackoverflow-url: https://stackoverflow.com/tags/spring-cloud
+    page-pagination: ''
+    hide-uri-scheme: '@'
+    tabs-sync-option: '@'
+    chomp: 'all'
+  extensions:
+    - '@asciidoctor/tabs'
+    - '@springio/asciidoctor-extensions'
+  sourcemap: true
+urls:
+  latest_version_segment: ''
+runtime:
+  log:
+    failure_level: warn
+    format: pretty
+ui:
+  bundle:
+    url: https://github.com/spring-io/antora-ui-spring/releases/download/v0.4.15/ui-bundle.zip

docs/antora.yml

@@ -0,0 +1,12 @@
+name: cloud-netflix
+version: true
+title: Spring Cloud Netflix
+nav:
+  - modules/ROOT/nav.adoc
+ext:
+  collector:
+    run:
+      command: ./mvnw --no-transfer-progress -B process-resources -Pdocs -pl docs -Dantora-maven-plugin.phase=none -Dgenerate-docs.phase=none -Dgenerate-readme.phase=none -Dgenerate-cloud-resources.phase=none -Dmaven-dependency-plugin-for-docs.phase=none -Dmaven-dependency-plugin-for-docs-classes.phase=none -DskipTests -DdisableConfigurationProperties
+      local: true
+    scan:
+      dir: ./target/classes/antora-resources/

docs/modules/ROOT/nav.adoc

@@ -0,0 +1,5 @@
+* xref:index.adoc[Introduction]
+* xref:spring-cloud-netflix.adoc[]
+* xref:appendix.adoc[]
+** xref:configprops.adoc[]
+

docs/modules/ROOT/pages/_attributes.adoc

@@ -1,8 +1,6 @@
 :doctype: book
 :idprefix:
 :idseparator: -
-:toc: left
-:toclevels: 4
 :tabsize: 4
 :numbered:
 :sectanchors:
@@ -12,4 +10,4 @@
 :docinfo: shared,private
 
 :sc-ext: java
-:project-full-name: Spring Cloud Netflix
+:project-full-name: Spring Cloud Netflix

docs/modules/ROOT/pages/appendix.adoc

@@ -1,14 +1,13 @@
 :numbered!:
 [appendix]
 [[common-application-properties]]
-== Common application properties
+= Common application properties
+:page-section-summary-toc: 1
 
-include::_attributes.adoc[]
 
 Various properties can be specified inside your `application.properties` file, inside your `application.yml` file, or as command line switches.
-This appendix provides a list of common {project-full-name} properties and references to the underlying classes that consume them.
+This appendix provides a list of common Spring Cloud Netflix properties and references to the underlying classes that consume them.
 
 NOTE: Property contributions can come from additional jar files on your classpath, so you should not consider this an exhaustive list.
 Also, you can define your own properties.
 
-include::_configprops.adoc[]

docs/modules/ROOT/pages/configprops.adoc

@@ -0,0 +1,6 @@
+[[configuration-properties]]
+= Configuration Properties
+
+Below you can find a list of configuration properties.
+
+include::partial$_configprops.adoc[]

docs/modules/ROOT/pages/index.adoc

@@ -0,0 +1 @@
+include::intro.adoc[]

docs/modules/ROOT/pages/intro.adoc

@@ -1,4 +1,5 @@
-include::_attributes.adoc[]
+[[introduction]]
+= Spring Cloud Netflix
 
 This project provides Netflix OSS integrations for Spring Boot apps through autoconfiguration
 and binding to the Spring Environment and other Spring programming model idioms. With a few

docs/modules/ROOT/pages/spring-cloud-netflix.adoc

@@ -1,20 +1,5 @@
-include::_attributes.adoc[]
-
-
-:github-tag: main
-:github-repo: spring-cloud/spring-cloud-netflix
-:github-raw: https://raw.github.com/{github-repo}/{github-tag}
-:github-code: https://github.com/{github-repo}/tree/{github-tag}
-:all: {asterisk}{asterisk}
-:nofooter:
-:branch: main
-
-= Spring Cloud Netflix
-
-*{spring-cloud-version}*
-
-include::intro.adoc[]
-
+[[features]]
+= Spring Cloud Netflix Features
 
 == Service Discovery: Eureka Clients
 
@@ -50,8 +35,9 @@ public class Application {
     }
 
     public static void main(String[] args) {
-        new SpringApplicationBuilder(Application.class).web(true).run(args);
-    }
+		SpringApplication.run(CustomerServiceTestApplication.class, args);
+	}
+
 
 }
 ----
@@ -112,19 +98,39 @@ NOTE: Because of a limitation in Eureka, it is not possible to support per-serve
 
 If you want to customize the RestTemplate used by the Eureka HTTP Client you may want to create a bean of `EurekaClientHttpRequestFactorySupplier` and provide your own logic for generating a `ClientHttpRequestFactory` instance.
 
-All default timeout-related properties for RestTemplate used by the Eureka HTTP Client are set to 3 minutes (in keeping with Apache HC5 default `RequestConfig` and `SocketConfig`). Therefore, to specify the timeout values, you must specify the value directly with the properties in `eureka.client.rest-template-timeout`. (All timeout properties are in milliseconds.)
+All default timeout-related properties for RestTemplate and RestClient used by the Eureka HTTP Client are set to 3 minutes (in keeping with Apache HC5 default `RequestConfig` and `SocketConfig`). Therefore, to specify the timeout values, you must specify the value directly with the properties in `eureka.client.rest-template-timeout` or `eureka.client.restclient.timeout`. All timeout properties are in milliseconds.
 
 .application.yml
 [source,yaml]
 ----
 eureka:
   client:
+    restclient:
+      timeout:
+        connect-timeout: 5000
+        connect-request-timeout: 8000
+        socket-timeout: 10000
     rest-template-timeout:
       connect-timeout: 5000
       connect-request-timeout: 8000
       socket-timeout: 10000
 ----
 
+You can also customise the `RequestConfig` for the underlying Apache HttpClient 5 by creating a bean of type `EurekaClientHttpRequestFactorySupplier.RequestConfigCustomizer`:
+
+[source,java,indent=0]
+----
+@Configuration
+public class RestClientConfiguration {
+
+	@Bean
+	EurekaClientHttpRequestFactorySupplier.RequestConfigCustomizer requestConfigCustomizer() {
+		return builder -> builder.setProtocolUpgradeEnabled(false);
+	}
+
+}
+----
+
 === Status Page and Health Indicator
 
 The status page and health indicators for a Eureka instance default to `/info` and `/health` respectively, which are the default locations of useful endpoints in a Spring Boot Actuator application.
@@ -282,32 +288,46 @@ Do not use the `EurekaClient` in a `@PostConstruct` method or in a `@Scheduled`
 It is initialized in a `SmartLifecycle` (with `phase=0`), so the earliest you can rely on it being available is in another `SmartLifecycle` with a higher phase.
 ====
 
-==== EurekaClient with Jersey
+==== Underlying HTTP clients
+
+`EurekaClient` uses either `RestClient`, `RestTemplate`, `WebClient` or `JerseyClient` under the hood. In order to use the `EurekaClient`, you need to have one of the supported HTTP clients on your classpath.
+
+To use `RestTemplate` or `RestClient`, add `spring-boot-starter-web` to your dependencies. To use `WebClient`, add `spring-boot-starter-webflux` to your dependencies. If both `spring-boot-starter-web`
+and `spring-boot-starter-webflux` are included in the dependencies and the `eureka.client.webclient.enabled` flag is set to `true`,
+then `WebClient` will be used. If that's not the case and `eureka.client.restclient.enabled` is set to `true`, `RestClient` will be used. Otherwise, `RestTemplate` will be used.
+
+NOTE: For any of those client implementations, if there's a builder bean available, it will be used to create the underlying client.
+
+NOTE: We're planning on changing the default client to `RestClient` with the next major release.
 
-By default, EurekaClient uses Spring's `RestTemplate` for HTTP communication.
 If you wish to use Jersey instead, you need to add the Jersey dependencies to your classpath.
 The following example shows the dependencies you need to add:
 
+[source,xml]
 ----
-<dependency>
-    <groupId>com.sun.jersey</groupId>
-    <artifactId>jersey-client</artifactId>
-</dependency>
-<dependency>
-    <groupId>com.sun.jersey</groupId>
-    <artifactId>jersey-core</artifactId>
-</dependency>
-<dependency>
-    <groupId>com.sun.jersey.contribs</groupId>
-    <artifactId>jersey-apache-client4</artifactId>
-</dependency>
+<dependencies>
+    <dependency>
+        <groupId>com.sun.jersey</groupId>
+        <artifactId>jersey-client</artifactId>
+    </dependency>
+    <dependency>
+        <groupId>com.sun.jersey</groupId>
+        <artifactId>jersey-core</artifactId>
+    </dependency>
+    <dependency>
+        <groupId>com.sun.jersey.contribs</groupId>
+        <artifactId>jersey-apache-client4</artifactId>
+    </dependency>
+</dependencies>
 ----
 
+If you have `JerseyClient` on the classpath but do not wish to use it in your `EuerekaClient`, make sure to set `eureka.client.jersey.enabled` to `false`.
+
 === Alternatives to the Native Netflix EurekaClient
 
 You need not use the raw Netflix `EurekaClient`.
 Also, it is usually more convenient to use it behind a wrapper of some sort.
-Spring Cloud has support for <<spring-cloud-feign, Feign>> (a REST client builder) and https://docs.spring.io/spring-cloud-commons/docs/current/reference/html/#spring-cloud-loadbalancer[Spring Cloud LoadBalancer] through the logical Eureka service identifiers (VIPs) instead of physical URLs.
+Spring Cloud has support for <<spring-cloud-feign, Feign>> (a REST client builder) and https://docs.spring.io/spring-cloud-commons/reference/4.1/spring-cloud-commons/loadbalancer.html[Spring Cloud LoadBalancer] through the logical Eureka service identifiers (VIPs) instead of physical URLs.
 
 You can also use the `org.springframework.cloud.client.discovery.DiscoveryClient`, which provides a simple API (not specific to Netflix) for discovery clients, as shown in the following example:
 
@@ -383,7 +403,9 @@ We take `eureka.client.availabilityZones`, which is a map from region name to a
 
 Spring Cloud Netflix Eureka Client integration supports Spring AOT transformations and native images, however, only with refresh mode disabled.
 
-WARNING: If you want to run Eureka Client in AOT or native image modes, make sure to set `spring.cloud.refresh.enabled` to `false`
+WARNING: If you want to run Eureka Client in AOT or native image modes, make sure to set `spring.cloud.refresh.enabled` to `false`.
+
+NOTE:  Given the AOT and native image closed-world assumption, using random port with Eureka clients is not supported for ahead of time compilation or native images.
 
 [[spring-cloud-eureka-server]]
 == Service Discovery: Eureka Server
@@ -418,8 +440,9 @@ The following example shows a minimal Eureka server:
 public class Application {
 
     public static void main(String[] args) {
-        new SpringApplicationBuilder(Application.class).web(true).run(args);
-    }
+		SpringApplication.run(CustomerServiceTestApplication.class, args);
+	}
+
 
 }
 ----
@@ -528,7 +551,7 @@ the registrations amongst themselves.
 If the peers are physically separated (inside a data center or between multiple data centers), then the system can, in principle, survive "`split-brain`" type failures.
 You can add multiple peers to a system, and as long as they are all
 directly connected to each other, they will synchronize
-the registrations amongst themselves. 
+the registrations amongst themselves.
 
 .application.yml (Three Peer Aware Eureka Servers)
 ----
@@ -536,7 +559,7 @@ eureka:
   client:
     serviceUrl:
       defaultZone: https://peer1/eureka/,http://peer2/eureka/,http://peer3/eureka/
-      
+
 ---
 spring:
   profiles: peer1
@@ -569,7 +592,7 @@ Set `eureka.instance.preferIpAddress` to `true` and, when the application regist
 ====
 If the hostname cannot be determined by Java, then the IP address is sent to Eureka.
 Only explict way of setting the hostname is by setting `eureka.instance.hostname` property.
-You can set your hostname at the run-time by using an environment variable -- for example, `eureka.instance.hostname=${HOST_NAME}`.
+You can set your hostname at the run-time by using an environment variable -- for example, `eureka.instance.hostname=$\{HOST_NAME}`.
 ====
 
 === Securing The Eureka Server
@@ -578,7 +601,7 @@ You can secure your Eureka server simply by adding Spring Security to your
 server's classpath via `spring-boot-starter-security`.  By default, when Spring Security is on the classpath it will require that
 a valid CSRF token be sent with every request to the app.  Eureka clients will not generally possess a valid
 cross site request forgery (CSRF) token you will need to disable this requirement for the `/eureka/**` endpoints.
-For example: 
+For example:
 
 [source,java,indent=0]
 ----
@@ -613,6 +636,17 @@ when running a Eureka server you must include these dependencies in your POM or
 
 Spring Cloud Netflix Eureka Server does not support Spring AOT transformations or native images.
 
+=== Metrics
+
+`EurekaInstanceMonitor` listens to events related to Eureka instance registration and creates/updates `Gauge`s for Eureka instance information in Micrometer's `MeterRegistry`. By default, this behavior is disabled. If you want to enable it, you need to set `eureka.server.metrics.enabled` to `true`.
+
+By default, the `Gauge`s are named `eureka.server.instances` and have the following tags:
+
+- `application`: application name
+- `status`: instance status (`UP`, `DOWN`, `STARTING`, `OUT_OF_SERVICE`, `UNKNOWN`, see: `com.netflix.appinfo.InstanceInfo.InstanceStatus`)
+
+You can add additional tags by injecting your own implementation of `EurekaInstanceTagsProvider`.
+
 == Configuration properties
 
 To see the list of all Spring Cloud Netflix related configuration properties please check link:appendix.html[the Appendix page].

docs/modules/ROOT/partials/_configprops.adoc

@@ -0,0 +1,266 @@
+|===
+|Name | Default | Description
+
+|eureka.client.allow-redirects | `+++false+++` | Indicates whether server can redirect a client request to a backup server/cluster. If set to false, the server will handle the request directly, If set to true, it may send HTTP redirect to the client, with a new server location.
+|eureka.client.availability-zones |  | Gets the list of availability zones (used in AWS data centers) for the region in which this instance resides. The changes are effective at runtime at the next registry fetch cycle as specified by registryFetchIntervalSeconds.
+|eureka.client.backup-registry-impl |  | Gets the name of the implementation which implements BackupRegistry to fetch the registry information as a fallback option for only the first time when the eureka client starts. This may be needed for applications which needs additional resiliency for registry information without which it cannot operate.
+|eureka.client.cache-refresh-executor-exponential-back-off-bound | `+++10+++` | Cache refresh executor exponential back off related property. It is a maximum multiplier value for retry delay, in case where a sequence of timeouts occurred.
+|eureka.client.cache-refresh-executor-thread-pool-size | `+++2+++` | The thread pool size for the cacheRefreshExecutor to initialise with.
+|eureka.client.client-data-accept |  | EurekaAccept name for client data accept.
+|eureka.client.decoder-name |  | This is a transient config and once the latest codecs are stable, can be removed (as there will only be one).
+|eureka.client.disable-delta | `+++false+++` | Indicates whether the eureka client should disable fetching of delta and should rather resort to getting the full registry information. Note that the delta fetches can reduce the traffic tremendously, because the rate of change with the eureka server is normally much lower than the rate of fetches. The changes are effective at runtime at the next registry fetch cycle as specified by registryFetchIntervalSeconds
+|eureka.client.dollar-replacement | `+++_-+++` | Get a replacement string for Dollar sign <code>$</code> during serializing/deserializing information in eureka server.
+|eureka.client.enabled | `+++true+++` | Flag to indicate that the Eureka client is enabled.
+|eureka.client.encoder-name |  | This is a transient config and once the latest codecs are stable, can be removed (as there will only be one).
+|eureka.client.escape-char-replacement | `+++__+++` | Get a replacement string for underscore sign <code>_</code> during serializing/ deserializing information in eureka server.
+|eureka.client.eureka-connection-idle-timeout-seconds | `+++30+++` | Indicates how much time (in seconds) that the HTTP connections to eureka server can stay idle before it can be closed. In the AWS environment, it is recommended that the values is 30 seconds or less, since the firewall cleans up the connection information after a few mins leaving the connection hanging in limbo.
+|eureka.client.eureka-server-connect-timeout-seconds | `+++5+++` | Indicates how long to wait (in seconds) before a connection to eureka server needs to timeout. Note that the connections in the client are pooled by {@link HttpClient} and this setting affects the actual connection creation and also the wait time to get the connection from the pool.
+|eureka.client.eureka-server-d-n-s-name |  | Gets the DNS name to be queried to get the list of eureka servers.This information is not required if the contract returns the service urls by implementing serviceUrls. The DNS mechanism is used when useDnsForFetchingServiceUrls is set to true and the eureka client expects the DNS to configured a certain way so that it can fetch changing eureka servers dynamically. The changes are effective at runtime.
+|eureka.client.eureka-server-port |  | Gets the port to be used to construct the service url to contact eureka server when the list of eureka servers come from the DNS.This information is not required if the contract returns the service urls eurekaServerServiceUrls(String). The DNS mechanism is used when useDnsForFetchingServiceUrls is set to true and the eureka client expects the DNS to configured a certain way so that it can fetch changing eureka servers dynamically. The changes are effective at runtime.
+|eureka.client.eureka-server-read-timeout-seconds | `+++8+++` | Indicates how long to wait (in seconds) before a read from eureka server needs to timeout.
+|eureka.client.eureka-server-total-connections | `+++200+++` | Gets the total number of connections that is allowed from eureka client to all eureka servers.
+|eureka.client.eureka-server-total-connections-per-host | `+++50+++` | Gets the total number of connections that is allowed from eureka client to a eureka server host.
+|eureka.client.eureka-server-u-r-l-context |  | Gets the URL context to be used to construct the service url to contact eureka server when the list of eureka servers come from the DNS. This information is not required if the contract returns the service urls from eurekaServerServiceUrls. The DNS mechanism is used when useDnsForFetchingServiceUrls is set to true and the eureka client expects the DNS to configured a certain way so that it can fetch changing eureka servers dynamically. The changes are effective at runtime.
+|eureka.client.eureka-service-url-poll-interval-seconds | `+++300+++` | Indicates how often(in seconds) to poll for changes to eureka server information. Eureka servers could be added or removed and this setting controls how soon the eureka clients should know about it.
+|eureka.client.fetch-registry | `+++true+++` | Indicates whether this client should fetch eureka registry information from eureka server.
+|eureka.client.fetch-remote-regions-registry |  | Comma separated list of regions for which the eureka registry information will be fetched. It is mandatory to define the availability zones for each of these regions as returned by availabilityZones. Failing to do so, will result in failure of discovery client startup.
+|eureka.client.filter-only-up-instances | `+++true+++` | Indicates whether to get the applications after filtering the applications for instances with only InstanceStatus UP states.
+|eureka.client.g-zip-content | `+++true+++` | Indicates whether the content fetched from eureka server has to be compressed whenever it is supported by the server. The registry information from the eureka server is compressed for optimum network traffic.
+|eureka.client.healthcheck.enabled | `+++true+++` | Enables the Eureka health check handler.
+|eureka.client.heartbeat-executor-exponential-back-off-bound | `+++10+++` | Heartbeat executor exponential back off related property. It is a maximum multiplier value for retry delay, in case where a sequence of timeouts occurred.
+|eureka.client.heartbeat-executor-thread-pool-size | `+++2+++` | The thread pool size for the heartbeatExecutor to initialise with.
+|eureka.client.initial-instance-info-replication-interval-seconds | `+++40+++` | Indicates how long initially (in seconds) to replicate instance info to the eureka server.
+|eureka.client.instance-info-replication-interval-seconds | `+++30+++` | Indicates how often(in seconds) to replicate instance changes to be replicated to the eureka server.
+|eureka.client.jersey.enabled | `+++true+++` | Enables the use of JerseyClient for Eureka HTTP Client.
+|eureka.client.log-delta-diff | `+++false+++` | Indicates whether to log differences between the eureka server and the eureka client in terms of registry information. Eureka client tries to retrieve only delta changes from eureka server to minimize network traffic. After receiving the deltas, eureka client reconciles the information from the server to verify it has not missed out some information. Reconciliation failures could happen when the client has had network issues communicating to server.If the reconciliation fails, eureka client gets the full registry information. While getting the full registry information, the eureka client can log the differences between the client and the server and this setting controls that. The changes are effective at runtime at the next registry fetch cycle as specified by registryFetchIntervalSecondsr
+|eureka.client.on-demand-update-status-change | `+++true+++` | If set to true, local status updates via ApplicationInfoManager will trigger on-demand (but rate limited) register/updates to remote eureka servers.
+|eureka.client.order | `+++0+++` | Order of the discovery client used by `CompositeDiscoveryClient` for sorting available clients.
+|eureka.client.prefer-same-zone-eureka | `+++true+++` | Indicates whether or not this instance should try to use the eureka server in the same zone for latency and/or other reason. Ideally eureka clients are configured to talk to servers in the same zone The changes are effective at runtime at the next registry fetch cycle as specified by registryFetchIntervalSeconds
+|eureka.client.property-resolver |  | 
+|eureka.client.proxy-host |  | Gets the proxy host to eureka server if any.
+|eureka.client.proxy-password |  | Gets the proxy password if any.
+|eureka.client.proxy-port |  | Gets the proxy port to eureka server if any.
+|eureka.client.proxy-user-name |  | Gets the proxy user name if any.
+|eureka.client.refresh.enable | `+++true+++` | Determines whether the EurekaClient instance can be refreshed or not(If disabled none of the Eureka client properties will be refreshable).
+|eureka.client.region | `+++us-east-1+++` | Gets the region (used in AWS datacenters) where this instance resides.
+|eureka.client.register-with-eureka | `+++true+++` | Indicates whether or not this instance should register its information with eureka server for discovery by others. In some cases, you do not want your instances to be discovered whereas you just want do discover other instances.
+|eureka.client.registry-fetch-interval-seconds | `+++30+++` | Indicates how often(in seconds) to fetch the registry information from the eureka server.
+|eureka.client.registry-refresh-single-vip-address |  | Indicates whether the client is only interested in the registry information for a single VIP.
+|eureka.client.rest-template-timeout.connect-request-timeout | `+++180000+++` | 
+|eureka.client.rest-template-timeout.connect-timeout | `+++180000+++` | Default values are set to 180000, in keeping with {@link RequestConfig} and {@link SocketConfig} defaults.
+|eureka.client.rest-template-timeout.socket-timeout | `+++180000+++` | 
+|eureka.client.restclient.enabled | `+++false+++` | Enables the use of RestClient for Eureka HTTP Client.
+|eureka.client.restclient.timeout.connect-request-timeout | `+++180000+++` | 
+|eureka.client.restclient.timeout.connect-timeout | `+++180000+++` | Default values are set to 180000, in keeping with {@link RequestConfig} and {@link SocketConfig} defaults.
+|eureka.client.restclient.timeout.socket-timeout | `+++180000+++` | 
+|eureka.client.service-url |  | Map of availability zone to list of fully qualified URLs to communicate with eureka server. Each value can be a single URL or a comma separated list of alternative locations. Typically the eureka server URLs carry protocol,host,port,context and version information if any. Example: https://ec2-256-156-243-129.compute-1.amazonaws.com:7001/eureka/ The changes are effective at runtime at the next service url refresh cycle as specified by eurekaServiceUrlPollIntervalSeconds.
+|eureka.client.should-enforce-registration-at-init | `+++false+++` | Indicates whether the client should enforce registration during initialization. Defaults to false.
+|eureka.client.should-unregister-on-shutdown | `+++true+++` | Indicates whether the client should explicitly unregister itself from the remote server on client shutdown.
+|eureka.client.tls.enabled |  | 
+|eureka.client.tls.key-password |  | 
+|eureka.client.tls.key-store |  | 
+|eureka.client.tls.key-store-password |  | 
+|eureka.client.tls.key-store-type |  | 
+|eureka.client.tls.trust-store |  | 
+|eureka.client.tls.trust-store-password |  | 
+|eureka.client.tls.trust-store-type |  | 
+|eureka.client.use-dns-for-fetching-service-urls | `+++false+++` | Indicates whether the eureka client should use the DNS mechanism to fetch a list of eureka servers to talk to. When the DNS name is updated to have additional servers, that information is used immediately after the eureka client polls for that information as specified in eurekaServiceUrlPollIntervalSeconds. Alternatively, the service urls can be returned serviceUrls, but the users should implement their own mechanism to return the updated list in case of changes. The changes are effective at runtime.
+|eureka.client.webclient.enabled | `+++false+++` | Enables the use of WebClient for Eureka HTTP Client.
+|eureka.dashboard.enabled | `+++true+++` | Flag to enable the Eureka dashboard. Default true.
+|eureka.dashboard.path | `+++/+++` | The path to the Eureka dashboard (relative to the servlet path). Defaults to "/".
+|eureka.datacenter | `+++default+++` | Eureka datacenter. Defaults to "default".
+|eureka.environment | `+++test+++` | Eureka environment. Defaults to "test".
+|eureka.instance.a-s-g-name |  | Gets the AWS autoscaling group name associated with this instance. This information is specifically used in an AWS environment to automatically put an instance out of service after the instance is launched and it has been disabled for traffic..
+|eureka.instance.app-group-name |  | Get the name of the application group to be registered with eureka.
+|eureka.instance.appname | `+++unknown+++` | Get the name of the application to be registered with eureka.
+|eureka.instance.async-client-initialization | `+++false+++` | If true the EurekaClient will be initialized asynchronously when the InstanceRegistry bean is created.
+|eureka.instance.data-center-info |  | Returns the data center this instance is deployed. This information is used to get some AWS specific instance information if the instance is deployed in AWS.
+|eureka.instance.default-address-resolution-order | `+++[]+++` | 
+|eureka.instance.environment |  | 
+|eureka.instance.health-check-url |  | Gets the absolute health check page URL for this instance. The users can provide the healthCheckUrlPath if the health check page resides in the same instance talking to eureka, else in the cases where the instance is a proxy for some other server, users can provide the full URL. If the full URL is provided it takes precedence. <p> It is normally used for making educated decisions based on the health of the instance - for example, it can be used to determine whether to proceed deployments to an entire farm or stop the deployments without causing further damage. The full URL should follow the format http://${eureka.hostname}:7001/ where the value ${eureka.hostname} is replaced at runtime.
+|eureka.instance.health-check-url-path |  | Gets the relative health check URL path for this instance. The health check page URL is then constructed out of the hostname and the type of communication - secure or unsecure as specified in securePort and nonSecurePort. It is normally used for making educated decisions based on the health of the instance - for example, it can be used to determine whether to proceed deployments to an entire farm or stop the deployments without causing further damage.
+|eureka.instance.home-page-url |  | Gets the absolute home page URL for this instance. The users can provide the homePageUrlPath if the home page resides in the same instance talking to eureka, else in the cases where the instance is a proxy for some other server, users can provide the full URL. If the full URL is provided it takes precedence. It is normally used for informational purposes for other services to use it as a landing page. The full URL should follow the format http://${eureka.hostname}:7001/ where the value ${eureka.hostname} is replaced at runtime.
+|eureka.instance.home-page-url-path | `+++/+++` | Gets the relative home page URL Path for this instance. The home page URL is then constructed out of the hostName and the type of communication - secure or unsecure. It is normally used for informational purposes for other services to use it as a landing page.
+|eureka.instance.hostname |  | The hostname if it can be determined at configuration time (otherwise it will be guessed from OS primitives).
+|eureka.instance.initial-status | `+++up+++` | Initial status to register with remote Eureka server.
+|eureka.instance.instance-enabled-onit | `+++false+++` | Indicates whether the instance should be enabled for taking traffic as soon as it is registered with eureka. Sometimes the application might need to do some pre-processing before it is ready to take traffic.
+|eureka.instance.instance-id |  | Get the unique Id (within the scope of the appName) of this instance to be registered with eureka.
+|eureka.instance.ip-address |  | Get the IPAdress of the instance. This information is for academic purposes only as the communication from other instances primarily happen using the information supplied in {@link #getHostName(boolean)}.
+|eureka.instance.lease-expiration-duration-in-seconds | `+++90+++` | Indicates the time in seconds that the eureka server waits since it received the last heartbeat before it can remove this instance from its view and there by disallowing traffic to this instance. Setting this value too long could mean that the traffic could be routed to the instance even though the instance is not alive. Setting this value too small could mean, the instance may be taken out of traffic because of temporary network glitches.This value to be set to atleast higher than the value specified in leaseRenewalIntervalInSeconds.
+|eureka.instance.lease-renewal-interval-in-seconds | `+++30+++` | Indicates how often (in seconds) the eureka client needs to send heartbeats to eureka server to indicate that it is still alive. If the heartbeats are not received for the period specified in leaseExpirationDurationInSeconds, eureka server will remove the instance from its view, there by disallowing traffic to this instance. Note that the instance could still not take traffic if it implements HealthCheckCallback and then decides to make itself unavailable.
+|eureka.instance.metadata-map |  | Gets the metadata name/value pairs associated with this instance. This information is sent to eureka server and can be used by other instances.
+|eureka.instance.metadata-map.weight | `+++1+++` | The weight of service instance for weighted load balancing.
+|eureka.instance.namespace | `+++eureka+++` | Get the namespace used to find properties. Ignored in Spring Cloud.
+|eureka.instance.non-secure-port | `+++80+++` | Get the non-secure port on which the instance should receive traffic.
+|eureka.instance.non-secure-port-enabled | `+++true+++` | Indicates whether the non-secure port should be enabled for traffic or not.
+|eureka.instance.prefer-ip-address | `+++false+++` | Flag to say that, when guessing a hostname, the IP address of the server should be used in preference to the hostname reported by the OS.
+|eureka.instance.registry.default-open-for-traffic-count | `+++1+++` | Value used in determining when leases are cancelled, default to 1 for standalone. Should be set to 0 for peer replicated eurekas
+|eureka.instance.registry.expected-number-of-clients-sending-renews | `+++1+++` | 
+|eureka.instance.secure-health-check-url |  | Gets the absolute secure health check page URL for this instance. The users can provide the secureHealthCheckUrl if the health check page resides in the same instance talking to eureka, else in the cases where the instance is a proxy for some other server, users can provide the full URL. If the full URL is provided it takes precedence. <p> It is normally used for making educated decisions based on the health of the instance - for example, it can be used to determine whether to proceed deployments to an entire farm or stop the deployments without causing further damage. The full URL should follow the format http://${eureka.hostname}:7001/ where the value ${eureka.hostname} is replaced at runtime.
+|eureka.instance.secure-port | `+++443+++` | Get the Secure port on which the instance should receive traffic.
+|eureka.instance.secure-port-enabled | `+++false+++` | Indicates whether the secure port should be enabled for traffic or not.
+|eureka.instance.secure-virtual-host-name | `+++unknown+++` | Gets the secure virtual host name defined for this instance. This is typically the way other instance would find this instance by using the secure virtual host name.Think of this as similar to the fully qualified domain name, that the users of your services will need to find this instance.
+|eureka.instance.status-page-url |  | Gets the absolute status page URL path for this instance. The users can provide the statusPageUrlPath if the status page resides in the same instance talking to eureka, else in the cases where the instance is a proxy for some other server, users can provide the full URL. If the full URL is provided it takes precedence. It is normally used for informational purposes for other services to find about the status of this instance. Users can provide a simple HTML indicating what is the current status of the instance.
+|eureka.instance.status-page-url-path |  | Gets the relative status page URL path for this instance. The status page URL is then constructed out of the hostName and the type of communication - secure or unsecure as specified in securePort and nonSecurePort. It is normally used for informational purposes for other services to find about the status of this instance. Users can provide a simple HTML indicating what is the current status of the instance.
+|eureka.instance.virtual-host-name | `+++unknown+++` | Gets the virtual host name defined for this instance. This is typically the way other instance would find this instance by using the virtual host name.Think of this as similar to the fully qualified domain name, that the users of your services will need to find this instance.
+|eureka.server.a-s-g-cache-expiry-timeout-ms | `+++600000+++` | 
+|eureka.server.a-s-g-query-timeout-ms | `+++300+++` | 
+|eureka.server.a-s-g-update-interval-ms | `+++300000+++` | 
+|eureka.server.a-w-s-access-id |  | 
+|eureka.server.a-w-s-secret-key |  | 
+|eureka.server.batch-replication | `+++false+++` | 
+|eureka.server.binding-strategy | `+++eip+++` | 
+|eureka.server.delta-retention-timer-interval-in-ms | `+++30000+++` | 
+|eureka.server.disable-delta | `+++false+++` | 
+|eureka.server.disable-delta-for-remote-regions | `+++false+++` | 
+|eureka.server.disable-transparent-fallback-to-other-region | `+++false+++` | 
+|eureka.server.e-i-p-bind-rebind-retries | `+++3+++` | 
+|eureka.server.e-i-p-binding-retry-interval-ms | `+++300000+++` | 
+|eureka.server.e-i-p-binding-retry-interval-ms-when-unbound | `+++60000+++` | 
+|eureka.server.enable-replicated-request-compression | `+++false+++` | 
+|eureka.server.enable-self-preservation | `+++true+++` | 
+|eureka.server.eviction-interval-timer-in-ms |  | 
+|eureka.server.expected-client-renewal-interval-seconds | `+++30+++` | 
+|eureka.server.g-zip-content-from-remote-region | `+++true+++` | 
+|eureka.server.initial-capacity-of-response-cache | `+++1000+++` | 
+|eureka.server.json-codec-name |  | 
+|eureka.server.list-auto-scaling-groups-role-name | `+++ListAutoScalingGroups+++` | 
+|eureka.server.log-identity-headers | `+++true+++` | 
+|eureka.server.max-elements-in-peer-replication-pool | `+++10000+++` | 
+|eureka.server.max-elements-in-status-replication-pool | `+++10000+++` | 
+|eureka.server.max-idle-thread-age-in-minutes-for-peer-replication | `+++15+++` | 
+|eureka.server.max-idle-thread-in-minutes-age-for-status-replication | `+++10+++` | 
+|eureka.server.max-threads-for-peer-replication | `+++20+++` | 
+|eureka.server.max-threads-for-status-replication | `+++1+++` | 
+|eureka.server.max-time-for-replication | `+++30000+++` | 
+|eureka.server.metrics.enabled | `+++false+++` | Indicates whether the metrics should be enabled for eureka instances.
+|eureka.server.min-available-instances-for-peer-replication | `+++-1+++` | 
+|eureka.server.min-threads-for-peer-replication | `+++5+++` | 
+|eureka.server.min-threads-for-status-replication | `+++1+++` | 
+|eureka.server.my-url |  | 
+|eureka.server.number-of-replication-retries | `+++5+++` | 
+|eureka.server.peer-eureka-nodes-update-interval-ms | `+++600000+++` | 
+|eureka.server.peer-eureka-status-refresh-time-interval-ms |  | 
+|eureka.server.peer-node-connect-timeout-ms | `+++200+++` | 
+|eureka.server.peer-node-connection-idle-timeout-seconds | `+++30+++` | 
+|eureka.server.peer-node-read-timeout-ms | `+++200+++` | 
+|eureka.server.peer-node-total-connections | `+++1000+++` | 
+|eureka.server.peer-node-total-connections-per-host | `+++500+++` | 
+|eureka.server.prime-aws-replica-connections | `+++true+++` | 
+|eureka.server.property-resolver |  | 
+|eureka.server.rate-limiter-burst-size | `+++10+++` | 
+|eureka.server.rate-limiter-enabled | `+++false+++` | 
+|eureka.server.rate-limiter-full-fetch-average-rate | `+++100+++` | 
+|eureka.server.rate-limiter-privileged-clients |  | 
+|eureka.server.rate-limiter-registry-fetch-average-rate | `+++500+++` | 
+|eureka.server.rate-limiter-throttle-standard-clients | `+++false+++` | 
+|eureka.server.registry-sync-retries | `+++0+++` | 
+|eureka.server.registry-sync-retry-wait-ms |  | 
+|eureka.server.remote-region-app-whitelist |  | 
+|eureka.server.remote-region-connect-timeout-ms | `+++1000+++` | 
+|eureka.server.remote-region-connection-idle-timeout-seconds | `+++30+++` | 
+|eureka.server.remote-region-fetch-thread-pool-size | `+++20+++` | 
+|eureka.server.remote-region-read-timeout-ms | `+++1000+++` | 
+|eureka.server.remote-region-registry-fetch-interval | `+++30+++` | 
+|eureka.server.remote-region-total-connections | `+++1000+++` | 
+|eureka.server.remote-region-total-connections-per-host | `+++500+++` | 
+|eureka.server.remote-region-trust-store |  | 
+|eureka.server.remote-region-trust-store-password | `+++changeit+++` | 
+|eureka.server.remote-region-urls |  | 
+|eureka.server.remote-region-urls-with-name |  | 
+|eureka.server.renewal-percent-threshold | `+++0.85+++` | 
+|eureka.server.renewal-threshold-update-interval-ms | `+++900000+++` | 
+|eureka.server.response-cache-auto-expiration-in-seconds | `+++180+++` | 
+|eureka.server.response-cache-update-interval-ms | `+++30000+++` | 
+|eureka.server.retention-time-in-m-s-in-delta-queue | `+++180000+++` | 
+|eureka.server.route53-bind-rebind-retries | `+++3+++` | 
+|eureka.server.route53-binding-retry-interval-ms | `+++300000+++` | 
+|eureka.server.route53-domain-t-t-l | `+++30+++` | 
+|eureka.server.sync-when-timestamp-differs | `+++true+++` | 
+|eureka.server.use-read-only-response-cache | `+++true+++` | 
+|eureka.server.wait-time-in-ms-when-sync-empty | `+++300000+++` | 
+|eureka.server.xml-codec-name |  | 
+|spring.cloud.compatibility-verifier.compatible-boot-versions | `+++3.5.x+++` | Default accepted versions for the Spring Boot dependency. You can set {@code x} for the patch version if you don't want to specify a concrete value. Example: {@code 3.5.x}
+|spring.cloud.compatibility-verifier.enabled | `+++false+++` | Enables creation of Spring Cloud compatibility verification.
+|spring.cloud.config.allow-override | `+++true+++` | Flag to indicate that {@link #isOverrideSystemProperties() systemPropertiesOverride} can be used. Set to false to prevent users from changing the default accidentally. Default true.
+|spring.cloud.config.initialize-on-context-refresh | `+++false+++` | Flag to initialize bootstrap configuration on context refresh event. Default false.
+|spring.cloud.config.override-none | `+++false+++` | Flag to indicate that when {@link #setAllowOverride(boolean) allowOverride} is true, external properties should take lowest priority and should not override any existing property sources (including local config files). Default false. This will only have an effect when using config first bootstrap.
+|spring.cloud.config.override-system-properties | `+++true+++` | Flag to indicate that the external properties should override system properties. Default true.
+|spring.cloud.decrypt-environment-post-processor.enabled | `+++true+++` | Enable the DecryptEnvironmentPostProcessor.
+|spring.cloud.discovery.client.composite-indicator.enabled | `+++true+++` | Enables discovery client composite health indicator.
+|spring.cloud.discovery.client.health-indicator.enabled | `+++true+++` | 
+|spring.cloud.discovery.client.health-indicator.include-description | `+++false+++` | 
+|spring.cloud.discovery.client.health-indicator.use-services-query | `+++true+++` | Whether or not the indicator should use {@link DiscoveryClient#getServices} to check its health. When set to {@code false} the indicator instead uses the lighter {@link DiscoveryClient#probe()}. This can be helpful in large deployments where the number of services returned makes the operation unnecessarily heavy.
+|spring.cloud.discovery.client.simple.instances |  | 
+|spring.cloud.discovery.client.simple.local.host |  | 
+|spring.cloud.discovery.client.simple.local.instance-id |  | 
+|spring.cloud.discovery.client.simple.local.metadata |  | 
+|spring.cloud.discovery.client.simple.local.port | `+++0+++` | 
+|spring.cloud.discovery.client.simple.local.secure | `+++false+++` | 
+|spring.cloud.discovery.client.simple.local.service-id |  | 
+|spring.cloud.discovery.client.simple.local.uri |  | 
+|spring.cloud.discovery.client.simple.order |  | 
+|spring.cloud.discovery.enabled | `+++true+++` | Enables discovery client health indicators.
+|spring.cloud.features.enabled | `+++true+++` | Enables the features endpoint.
+|spring.cloud.httpclientfactories.apache.enabled | `+++true+++` | Enables creation of Apache Http Client factory beans.
+|spring.cloud.httpclientfactories.ok.enabled | `+++true+++` | Enables creation of OK Http Client factory beans.
+|spring.cloud.hypermedia.refresh.fixed-delay | `+++5000+++` | 
+|spring.cloud.hypermedia.refresh.initial-delay | `+++10000+++` | 
+|spring.cloud.inetutils.default-hostname | `+++localhost+++` | The default hostname. Used in case of errors.
+|spring.cloud.inetutils.default-ip-address | `+++127.0.0.1+++` | The default IP address. Used in case of errors.
+|spring.cloud.inetutils.ignored-interfaces |  | List of Java regular expressions for network interfaces that will be ignored.
+|spring.cloud.inetutils.preferred-networks |  | List of Java regular expressions for network addresses that will be preferred.
+|spring.cloud.inetutils.timeout-seconds | `+++1+++` | Timeout, in seconds, for calculating hostname.
+|spring.cloud.inetutils.use-only-site-local-interfaces | `+++false+++` | Whether to use only interfaces with site local addresses. See {@link InetAddress#isSiteLocalAddress()} for more details.
+|spring.cloud.loadbalancer.cache.caffeine.spec |  | The spec to use to create caches. See CaffeineSpec for more details on the spec format.
+|spring.cloud.loadbalancer.cache.capacity | `+++256+++` | Initial cache capacity expressed as int.
+|spring.cloud.loadbalancer.cache.enabled | `+++true+++` | Enables Spring Cloud LoadBalancer caching mechanism.
+|spring.cloud.loadbalancer.cache.ttl | `+++35s+++` | Time To Live - time counted from writing of the record, after which cache entries are expired, expressed as a {@link Duration}. The property {@link String} has to be in keeping with the appropriate syntax as specified in Spring Boot <code>StringToDurationConverter</code>. @see <a href= "https://github.com/spring-projects/spring-boot/blob/master/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/convert/StringToDurationConverter.java">StringToDurationConverter.java</a>
+|spring.cloud.loadbalancer.call-get-with-request-on-delegates | `+++true+++` | If this flag is set to {@code true}, {@code ServiceInstanceListSupplier#get(Request request)} method will be implemented to call {@code delegate.get(request)} in classes assignable from {@code DelegatingServiceInstanceListSupplier} that don't already implement that method, with the exclusion of {@code CachingServiceInstanceListSupplier} and {@code HealthCheckServiceInstanceListSupplier}, which should be placed in the instance supplier hierarchy directly after the supplier performing instance retrieval over the network, before any request-based filtering is done, {@code true} by default.
+|spring.cloud.loadbalancer.clients |  | 
+|spring.cloud.loadbalancer.configurations | `+++default+++` | Enables a predefined LoadBalancer configuration.
+|spring.cloud.loadbalancer.eager-load.clients |  | Names of the clients.
+|spring.cloud.loadbalancer.enabled | `+++true+++` | Enables Spring Cloud LoadBalancer.
+|spring.cloud.loadbalancer.eureka.approximate-zone-from-hostname | `+++false+++` | Used to determine whether we should try to get the `zone` value from host name.
+|spring.cloud.loadbalancer.health-check.initial-delay | `+++0+++` | Initial delay value for the HealthCheck scheduler.
+|spring.cloud.loadbalancer.health-check.interval | `+++25s+++` | Interval for rerunning the HealthCheck scheduler.
+|spring.cloud.loadbalancer.health-check.path |  | Path at which the health-check request should be made. Can be set up per `serviceId`. A `default` value can be set up as well. If none is set up, `/actuator/health` will be used.
+|spring.cloud.loadbalancer.health-check.port |  | Path at which the health-check request should be made. If none is set, the port under which the requested service is available at the service instance.
+|spring.cloud.loadbalancer.health-check.refetch-instances | `+++false+++` | Indicates whether the instances should be refetched by the `HealthCheckServiceInstanceListSupplier`. This can be used if the instances can be updated and the underlying delegate does not provide an ongoing flux.
+|spring.cloud.loadbalancer.health-check.refetch-instances-interval | `+++25s+++` | Interval for refetching available service instances.
+|spring.cloud.loadbalancer.health-check.repeat-health-check | `+++true+++` | Indicates whether health checks should keep repeating. It might be useful to set it to `false` if periodically refetching the instances, as every refetch will also trigger a healthcheck.
+|spring.cloud.loadbalancer.health-check.update-results-list | `+++true+++` | Indicates whether the {@code healthCheckFlux} should emit on each alive {@link ServiceInstance} that has been retrieved. If set to {@code false}, the entire alive instances sequence is first collected into a list and only then emitted.
+|spring.cloud.loadbalancer.hint |  | Allows setting the value of <code>hint</code> that is passed on to the LoadBalancer request and can subsequently be used in {@link ReactiveLoadBalancer} implementations.
+|spring.cloud.loadbalancer.hint-header-name | `+++X-SC-LB-Hint+++` | Allows setting the name of the header used for passing the hint for hint-based service instance filtering.
+|spring.cloud.loadbalancer.retry.avoid-previous-instance | `+++true+++` | Enables wrapping ServiceInstanceListSupplier beans with `RetryAwareServiceInstanceListSupplier` if Spring-Retry is in the classpath.
+|spring.cloud.loadbalancer.retry.backoff.enabled | `+++false+++` | Indicates whether Reactor Retry backoffs should be applied.
+|spring.cloud.loadbalancer.retry.backoff.jitter | `+++0.5+++` | Used to set `RetryBackoffSpec.jitter`.
+|spring.cloud.loadbalancer.retry.backoff.max-backoff | `+++Long.MAX ms+++` | Used to set `RetryBackoffSpec.maxBackoff`.
+|spring.cloud.loadbalancer.retry.backoff.min-backoff | `+++5 ms+++` | Used to set `RetryBackoffSpec#minBackoff`.
+|spring.cloud.loadbalancer.retry.enabled | `+++true+++` | Enables LoadBalancer retries.
+|spring.cloud.loadbalancer.retry.max-retries-on-next-service-instance | `+++1+++` | Number of retries to be executed on the next `ServiceInstance`. A `ServiceInstance` is chosen before each retry call.
+|spring.cloud.loadbalancer.retry.max-retries-on-same-service-instance | `+++0+++` | Number of retries to be executed on the same `ServiceInstance`.
+|spring.cloud.loadbalancer.retry.retry-on-all-exceptions | `+++false+++` | Indicates retries should be attempted for all exceptions, not only those specified in `retryableExceptions`.
+|spring.cloud.loadbalancer.retry.retry-on-all-operations | `+++false+++` | Indicates retries should be attempted on operations other than `HttpMethod.GET`.
+|spring.cloud.loadbalancer.retry.retryable-exceptions | `+++{}+++` | A `Set` of `Throwable` classes that should trigger a retry.
+|spring.cloud.loadbalancer.retry.retryable-status-codes | `+++{}+++` | A `Set` of status codes that should trigger a retry.
+|spring.cloud.loadbalancer.service-discovery.timeout |  | String representation of Duration of the timeout for calls to service discovery.
+|spring.cloud.loadbalancer.stats.include-path | `+++true+++` | Indicates whether the {@code path} should be added to {@code uri} tag in metrics. When {@link RestTemplate} is used to execute load-balanced requests with high cardinality paths, setting it to {@code false} is recommended.
+|spring.cloud.loadbalancer.stats.micrometer.enabled | `+++false+++` | Enables Spring Cloud LoadBalancer Micrometer stats.
+|spring.cloud.loadbalancer.sticky-session.add-service-instance-cookie | `+++false+++` | Indicates whether a cookie with the newly selected instance should be added by LoadBalancer.
+|spring.cloud.loadbalancer.sticky-session.instance-id-cookie-name | `+++sc-lb-instance-id+++` | The name of the cookie holding the preferred instance id.
+|spring.cloud.loadbalancer.subset.instance-id |  | Instance id of deterministic subsetting. If not set, {@link IdUtils#getDefaultInstanceId(PropertyResolver)} will be used.
+|spring.cloud.loadbalancer.subset.size | `+++100+++` | Max subset size of deterministic subsetting.
+|spring.cloud.loadbalancer.x-forwarded.enabled | `+++false+++` | To Enable X-Forwarded Headers.
+|spring.cloud.loadbalancer.zone |  | Spring Cloud LoadBalancer zone.
+|spring.cloud.refresh.additional-property-sources-to-retain |  | Additional property sources to retain during a refresh. Typically only system property sources are retained. This property allows property sources, such as property sources created by EnvironmentPostProcessors to be retained as well.
+|spring.cloud.refresh.enabled | `+++true+++` | Enables autoconfiguration for the refresh scope and associated features.
+|spring.cloud.refresh.extra-refreshable | `+++true+++` | Additional bean names or class names for beans to post process into refresh scope.
+|spring.cloud.refresh.never-refreshable | `+++true+++` | Comma separated list of bean names or class names for beans to never be refreshed or rebound.
+|spring.cloud.refresh.on-restart.enabled | `+++true+++` | Enable refreshing context on start.
+|spring.cloud.service-registry.auto-registration.enabled | `+++true+++` | Whether service auto-registration is enabled. Defaults to true.
+|spring.cloud.service-registry.auto-registration.fail-fast | `+++false+++` | Whether startup fails if there is no AutoServiceRegistration. Defaults to false.
+|spring.cloud.service-registry.auto-registration.register-management | `+++true+++` | Whether to register the management as a service. Defaults to true.
+|spring.cloud.util.enabled | `+++true+++` | Enables creation of Spring Cloud utility beans.
+
+|===

docs/package.json

@@ -0,0 +1,10 @@
+{
+  "dependencies": {
+    "antora": "3.2.0-alpha.11",
+    "@antora/atlas-extension": "1.0.0-alpha.5",
+    "@antora/collector-extension": "1.0.3",
+    "@asciidoctor/tabs": "1.0.0-beta.6",
+    "@springio/antora-extensions": "1.14.9",
+    "@springio/asciidoctor-extensions": "1.0.0-alpha.18"
+  }
+}

docs/pom.xml

@@ -1,66 +1,84 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-	 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+		 xmlns="http://maven.apache.org/POM/4.0.0"
+		 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>
+	<groupId>org.springframework.cloud</groupId>
+	<artifactId>spring-cloud-netflix-docs</artifactId>
 	<parent>
 		<groupId>org.springframework.cloud</groupId>
 		<artifactId>spring-cloud-netflix</artifactId>
-		<version>4.0.4-SNAPSHOT</version>
+		<version>4.3.2</version>
+		<relativePath>..</relativePath>
 	</parent>
-	<artifactId>spring-cloud-netflix-docs</artifactId>
 	<packaging>jar</packaging>
 	<name>Spring Cloud Netflix Docs</name>
-	<description>Spring Cloud Docs</description>
+	<description>Spring Cloud Netflix Docs</description>
 	<properties>
 		<docs.main>spring-cloud-netflix</docs.main>
 		<main.basedir>${basedir}/..</main.basedir>
-		<configprops.inclusionPattern>
-			.*.eureka.*
-		</configprops.inclusionPattern>
-		<upload-docs-zip.phase>deploy</upload-docs-zip.phase>
+		<configprops.inclusionPattern>eureka.*|spring.cloud.*</configprops.inclusionPattern>
 		<!-- Don't upload docs jar to central / repo.spring.io -->
 		<maven-deploy-plugin-default.phase>none</maven-deploy-plugin-default.phase>
 	</properties>
-	<dependencies>
-		<dependency>
-			<groupId>${project.groupId}</groupId>
-			<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
-		</dependency>
-		<dependency>
-			<groupId>${project.groupId}</groupId>
-			<artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
-		</dependency>
-	</dependencies>
 	<build>
 		<sourceDirectory>src/main/asciidoc</sourceDirectory>
 	</build>
 	<profiles>
+		<profile>
+			<id>enable-configuration-properties</id>
+			<activation>
+				<property>
+					<name>!disableConfigurationProperties</name>
+				</property>
+			</activation>
+			<dependencies>
+				<dependency>
+					<groupId>${project.groupId}</groupId>
+					<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
+				</dependency>
+				<dependency>
+					<groupId>${project.groupId}</groupId>
+					<artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
+				</dependency>
+			</dependencies>
+		</profile>
 		<profile>
 			<id>docs</id>
 			<build>
+				<resources>
+					<resource>
+						<directory>src/main/antora/resources/antora-resources</directory>
+						<filtering>true</filtering>
+					</resource>
+				</resources>
 				<plugins>
 					<plugin>
 						<groupId>pl.project13.maven</groupId>
 						<artifactId>git-commit-id-plugin</artifactId>
 					</plugin>
 					<plugin>
+						<groupId>org.apache.maven.plugins</groupId>
 						<artifactId>maven-dependency-plugin</artifactId>
 					</plugin>
-					<plugin>
-						<artifactId>maven-resources-plugin</artifactId>
-					</plugin>
 					<plugin>
 						<groupId>org.codehaus.mojo</groupId>
 						<artifactId>exec-maven-plugin</artifactId>
 					</plugin>
 					<plugin>
-						<groupId>org.asciidoctor</groupId>
-						<artifactId>asciidoctor-maven-plugin</artifactId>
+						<groupId>io.spring.maven.antora</groupId>
+						<artifactId>antora-component-version-maven-plugin</artifactId>
 					</plugin>
 					<plugin>
+						<groupId>org.antora</groupId>
+						<artifactId>antora-maven-plugin</artifactId>
+					</plugin>
+					<plugin>
+						<groupId>org.apache.maven.plugins</groupId>
 						<artifactId>maven-antrun-plugin</artifactId>
 					</plugin>
 					<plugin>
+						<groupId>org.apache.maven.plugins</groupId>
 						<artifactId>maven-deploy-plugin</artifactId>
 					</plugin>
 				</plugins>

docs/src/main/antora/resources/antora-resources/antora.yml

@@ -0,0 +1,20 @@
+version: @antora-component.version@
+prerelease: @antora-component.prerelease@
+
+asciidoc:
+  attributes:
+    attribute-missing: 'warn'
+    chomp: 'all'
+    project-root: @maven.multiModuleProjectDirectory@
+    github-repo: @docs.main@
+    github-raw: https://raw.githubusercontent.com/spring-cloud/@docs.main@/@github-tag@
+    github-code: https://github.com/spring-cloud/@docs.main@/tree/@github-tag@
+    github-issues: https://github.com/spring-cloud/@docs.main@/issues/
+    github-wiki: https://github.com/spring-cloud/@docs.main@/wiki
+    spring-cloud-version: @project.version@
+    github-tag: @github-tag@
+    version-type: @version-type@
+    docs-url: https://docs.spring.io/@docs.main@/docs/@project.version@
+    raw-docs-url: https://raw.githubusercontent.com/spring-cloud/@docs.main@/@github-tag@
+    project-version: @project.version@
+    project-name: @docs.main@

docs/src/main/asciidoc/README.adoc

@@ -1,17 +1,17 @@
-include::_attributes.adoc[]
 
-image::https://github.com/spring-cloud/spring-cloud-netflix/actions/workflows/maven.yml/badge.svg?branch=4.0.x&style=svg["Build",link="https://github.com/spring-cloud/spring-cloud-netflix/actions/workflows/maven.yml"]
+image::https://github.com/spring-cloud/spring-cloud-netflix/actions/workflows/maven.yml/badge.svg?branch=main&style=svg["Build",link="https://github.com/spring-cloud/spring-cloud-netflix/actions/workflows/maven.yml"]
 
-image:https://codecov.io/gh/spring-cloud/spring-cloud-netflix/branch/4.0.x/graph/badge.svg["Codecov", link="https://app.codecov.io/gh/spring-cloud/spring-cloud-netflix/tree/4.0.x"]
+image:https://codecov.io/gh/spring-cloud/spring-cloud-netflix/branch/main/graph/badge.svg["Codecov", link="https://app.codecov.io/gh/spring-cloud/spring-cloud-netflix/tree/main"]
 
-include::intro.adoc[]
 
+[[features]]
 == Features
 
 * Service Discovery: Eureka instances can be registered and clients can discover the instances using Spring-managed beans
 * Service Discovery: an embedded Eureka server can be created with declarative Java configuration
 
 
+[[building]]
 == Building
 
 include::https://raw.githubusercontent.com/spring-cloud/spring-cloud-build/main/docs/modules/ROOT/partials/building.adoc[]
@@ -19,10 +19,12 @@ include::https://raw.githubusercontent.com/spring-cloud/spring-cloud-build/main/
 NOTE:  To build the module `spring-cloud-netflix-hystrix-contract` along with the entire Netflix project run the
 `build.sh` script in the `scripts` directory.
 
+[[contributing]]
 == Contributing
 
 include::https://raw.githubusercontent.com/spring-cloud/spring-cloud-build/main/docs/modules/ROOT/partials/contributing-docs.adoc[]
 
+[[license]]
 == License
 
-The project license file is available https://raw.githubusercontent.com/spring-cloud/spring-cloud-netflix/main/LICENSE.txt[here].
+The project license file is available https://raw.githubusercontent.com/spring-cloud/spring-cloud-netflix/main/LICENSE.txt[here].

docs/src/main/asciidoc/_configprops.adoc

@@ -1,19 +0,0 @@
-|===
-|Name | Default | Description
-
-|eureka.client.eureka-connection-idle-timeout-seconds | `+++30+++` | Indicates how much time (in seconds) that the HTTP connections to eureka server can stay idle before it can be closed. In the AWS environment, it is recommended that the values is 30 seconds or less, since the firewall cleans up the connection information after a few mins leaving the connection hanging in limbo.
-|eureka.client.eureka-server-connect-timeout-seconds | `+++5+++` | Indicates how long to wait (in seconds) before a connection to eureka server needs to timeout. Note that the connections in the client are pooled by {@link HttpClient} and this setting affects the actual connection creation and also the wait time to get the connection from the pool.
-|eureka.client.eureka-server-d-n-s-name |  | Gets the DNS name to be queried to get the list of eureka servers.This information is not required if the contract returns the service urls by implementing serviceUrls. The DNS mechanism is used when useDnsForFetchingServiceUrls is set to true and the eureka client expects the DNS to configured a certain way so that it can fetch changing eureka servers dynamically. The changes are effective at runtime.
-|eureka.client.eureka-server-port |  | Gets the port to be used to construct the service url to contact eureka server when the list of eureka servers come from the DNS.This information is not required if the contract returns the service urls eurekaServerServiceUrls(String). The DNS mechanism is used when useDnsForFetchingServiceUrls is set to true and the eureka client expects the DNS to configured a certain way so that it can fetch changing eureka servers dynamically. The changes are effective at runtime.
-|eureka.client.eureka-server-read-timeout-seconds | `+++8+++` | Indicates how long to wait (in seconds) before a read from eureka server needs to timeout.
-|eureka.client.eureka-server-total-connections | `+++200+++` | Gets the total number of connections that is allowed from eureka client to all eureka servers.
-|eureka.client.eureka-server-total-connections-per-host | `+++50+++` | Gets the total number of connections that is allowed from eureka client to a eureka server host.
-|eureka.client.eureka-server-u-r-l-context |  | Gets the URL context to be used to construct the service url to contact eureka server when the list of eureka servers come from the DNS. This information is not required if the contract returns the service urls from eurekaServerServiceUrls. The DNS mechanism is used when useDnsForFetchingServiceUrls is set to true and the eureka client expects the DNS to configured a certain way so that it can fetch changing eureka servers dynamically. The changes are effective at runtime.
-|eureka.client.eureka-service-url-poll-interval-seconds | `+++0+++` | Indicates how often(in seconds) to poll for changes to eureka server information. Eureka servers could be added or removed and this setting controls how soon the eureka clients should know about it.
-|eureka.client.prefer-same-zone-eureka | `+++true+++` | Indicates whether or not this instance should try to use the eureka server in the same zone for latency and/or other reason. Ideally eureka clients are configured to talk to servers in the same zone The changes are effective at runtime at the next registry fetch cycle as specified by registryFetchIntervalSeconds
-|eureka.client.register-with-eureka | `+++true+++` | Indicates whether or not this instance should register its information with eureka server for discovery by others. In some cases, you do not want your instances to be discovered whereas you just want do discover other instances.
-|eureka.server.peer-eureka-nodes-update-interval-ms | `+++0+++` | 
-|eureka.server.peer-eureka-status-refresh-time-interval-ms | `+++0+++` | 
-|spring.cloud.loadbalancer.eureka.approximate-zone-from-hostname | `+++false+++` | Used to determine whether we should try to get the `zone` value from host name.
-
-|===

docs/src/main/asciidoc/index.adoc

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

mvnw

@@ -8,7 +8,7 @@
 # "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
+#    http://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
@@ -19,7 +19,7 @@
 # ----------------------------------------------------------------------------
 
 # ----------------------------------------------------------------------------
-# Maven2 Start Up Batch script
+# Apache Maven Wrapper startup batch script, version 3.2.0
 #
 # Required ENV vars:
 # ------------------
@@ -27,7 +27,6 @@
 #
 # Optional ENV vars
 # -----------------
-#   M2_HOME - location of maven2's installed home dir
 #   MAVEN_OPTS - parameters passed to the Java VM when running Maven
 #     e.g. to debug Maven itself, use
 #       set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
@@ -36,6 +35,10 @@
 
 if [ -z "$MAVEN_SKIP_RC" ] ; then
 
+  if [ -f /usr/local/etc/mavenrc ] ; then
+    . /usr/local/etc/mavenrc
+  fi
+
   if [ -f /etc/mavenrc ] ; then
     . /etc/mavenrc
   fi
@@ -50,7 +53,7 @@ fi
 cygwin=false;
 darwin=false;
 mingw=false
-case "`uname`" in
+case "$(uname)" in
   CYGWIN*) cygwin=true ;;
   MINGW*) mingw=true;;
   Darwin*) darwin=true
@@ -58,9 +61,9 @@ case "`uname`" in
     # See https://developer.apple.com/library/mac/qa/qa1170/_index.html
     if [ -z "$JAVA_HOME" ]; then
       if [ -x "/usr/libexec/java_home" ]; then
-        export JAVA_HOME="`/usr/libexec/java_home`"
+        JAVA_HOME="$(/usr/libexec/java_home)"; export JAVA_HOME
       else
-        export JAVA_HOME="/Library/Java/Home"
+        JAVA_HOME="/Library/Java/Home"; export JAVA_HOME
       fi
     fi
     ;;
@@ -68,69 +71,38 @@ esac
 
 if [ -z "$JAVA_HOME" ] ; then
   if [ -r /etc/gentoo-release ] ; then
-    JAVA_HOME=`java-config --jre-home`
+    JAVA_HOME=$(java-config --jre-home)
   fi
 fi
 
-if [ -z "$M2_HOME" ] ; then
-  ## resolve links - $0 may be a link to maven's home
-  PRG="$0"
-
-  # need this for relative symlinks
-  while [ -h "$PRG" ] ; do
-    ls=`ls -ld "$PRG"`
-    link=`expr "$ls" : '.*-> \(.*\)$'`
-    if expr "$link" : '/.*' > /dev/null; then
-      PRG="$link"
-    else
-      PRG="`dirname "$PRG"`/$link"
-    fi
-  done
-
-  saveddir=`pwd`
-
-  M2_HOME=`dirname "$PRG"`/..
-
-  # make it fully qualified
-  M2_HOME=`cd "$M2_HOME" && pwd`
-
-  cd "$saveddir"
-  # echo Using m2 at $M2_HOME
-fi
-
 # For Cygwin, ensure paths are in UNIX format before anything is touched
 if $cygwin ; then
-  [ -n "$M2_HOME" ] &&
-    M2_HOME=`cygpath --unix "$M2_HOME"`
   [ -n "$JAVA_HOME" ] &&
-    JAVA_HOME=`cygpath --unix "$JAVA_HOME"`
+    JAVA_HOME=$(cygpath --unix "$JAVA_HOME")
   [ -n "$CLASSPATH" ] &&
-    CLASSPATH=`cygpath --path --unix "$CLASSPATH"`
+    CLASSPATH=$(cygpath --path --unix "$CLASSPATH")
 fi
 
 # For Mingw, ensure paths are in UNIX format before anything is touched
 if $mingw ; then
-  [ -n "$M2_HOME" ] &&
-    M2_HOME="`(cd "$M2_HOME"; pwd)`"
-  [ -n "$JAVA_HOME" ] &&
-    JAVA_HOME="`(cd "$JAVA_HOME"; pwd)`"
-  # TODO classpath?
+  [ -n "$JAVA_HOME" ] && [ -d "$JAVA_HOME" ] &&
+    JAVA_HOME="$(cd "$JAVA_HOME" || (echo "cannot cd into $JAVA_HOME."; exit 1); pwd)"
 fi
 
 if [ -z "$JAVA_HOME" ]; then
-  javaExecutable="`which javac`"
-  if [ -n "$javaExecutable" ] && ! [ "`expr \"$javaExecutable\" : '\([^ ]*\)'`" = "no" ]; then
+  javaExecutable="$(which javac)"
+  if [ -n "$javaExecutable" ] && ! [ "$(expr "\"$javaExecutable\"" : '\([^ ]*\)')" = "no" ]; then
     # readlink(1) is not available as standard on Solaris 10.
-    readLink=`which readlink`
-    if [ ! `expr "$readLink" : '\([^ ]*\)'` = "no" ]; then
+    readLink=$(which readlink)
+    if [ ! "$(expr "$readLink" : '\([^ ]*\)')" = "no" ]; then
       if $darwin ; then
-        javaHome="`dirname \"$javaExecutable\"`"
-        javaExecutable="`cd \"$javaHome\" && pwd -P`/javac"
+        javaHome="$(dirname "\"$javaExecutable\"")"
+        javaExecutable="$(cd "\"$javaHome\"" && pwd -P)/javac"
       else
-        javaExecutable="`readlink -f \"$javaExecutable\"`"
+        javaExecutable="$(readlink -f "\"$javaExecutable\"")"
       fi
-      javaHome="`dirname \"$javaExecutable\"`"
-      javaHome=`expr "$javaHome" : '\(.*\)/bin'`
+      javaHome="$(dirname "\"$javaExecutable\"")"
+      javaHome=$(expr "$javaHome" : '\(.*\)/bin')
       JAVA_HOME="$javaHome"
       export JAVA_HOME
     fi
@@ -146,7 +118,7 @@ if [ -z "$JAVACMD" ] ; then
       JAVACMD="$JAVA_HOME/bin/java"
     fi
   else
-    JAVACMD="`which java`"
+    JAVACMD="$(\unset -f command 2>/dev/null; \command -v java)"
   fi
 fi
 
@@ -160,12 +132,9 @@ if [ -z "$JAVA_HOME" ] ; then
   echo "Warning: JAVA_HOME environment variable is not set."
 fi
 
-CLASSWORLDS_LAUNCHER=org.codehaus.plexus.classworlds.launcher.Launcher
-
 # traverses directory structure from process work directory to filesystem root
 # first directory with .mvn subdirectory is considered project base directory
 find_maven_basedir() {
-
   if [ -z "$1" ]
   then
     echo "Path not specified to find_maven_basedir"
@@ -181,76 +150,99 @@ find_maven_basedir() {
     fi
     # workaround for JBEAP-8937 (on Solaris 10/Sparc)
     if [ -d "${wdir}" ]; then
-      wdir=`cd "$wdir/.."; pwd`
+      wdir=$(cd "$wdir/.." || exit 1; pwd)
     fi
     # end of workaround
   done
-  echo "${basedir}"
+  printf '%s' "$(cd "$basedir" || exit 1; pwd)"
 }
 
 # concatenates all lines of a file
 concat_lines() {
   if [ -f "$1" ]; then
-    echo "$(tr -s '\n' ' ' < "$1")"
+    # Remove \r in case we run on Windows within Git Bash
+    # and check out the repository with auto CRLF management
+    # enabled. Otherwise, we may read lines that are delimited with
+    # \r\n and produce $'-Xarg\r' rather than -Xarg due to word
+    # splitting rules.
+    tr -s '\r\n' ' ' < "$1"
   fi
 }
 
-BASE_DIR=`find_maven_basedir "$(pwd)"`
+log() {
+  if [ "$MVNW_VERBOSE" = true ]; then
+    printf '%s\n' "$1"
+  fi
+}
+
+BASE_DIR=$(find_maven_basedir "$(dirname "$0")")
 if [ -z "$BASE_DIR" ]; then
   exit 1;
 fi
 
+MAVEN_PROJECTBASEDIR=${MAVEN_BASEDIR:-"$BASE_DIR"}; export MAVEN_PROJECTBASEDIR
+log "$MAVEN_PROJECTBASEDIR"
+
 ##########################################################################################
 # Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
 # This allows using the maven wrapper in projects that prohibit checking in binary data.
 ##########################################################################################
-if [ -r "$BASE_DIR/.mvn/wrapper/maven-wrapper.jar" ]; then
-    if [ "$MVNW_VERBOSE" = true ]; then
-      echo "Found .mvn/wrapper/maven-wrapper.jar"
-    fi
+wrapperJarPath="$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.jar"
+if [ -r "$wrapperJarPath" ]; then
+    log "Found $wrapperJarPath"
 else
-    if [ "$MVNW_VERBOSE" = true ]; then
-      echo "Couldn't find .mvn/wrapper/maven-wrapper.jar, downloading it ..."
+    log "Couldn't find $wrapperJarPath, downloading it ..."
+
+    if [ -n "$MVNW_REPOURL" ]; then
+      wrapperUrl="$MVNW_REPOURL/org/apache/maven/wrapper/maven-wrapper/3.2.0/maven-wrapper-3.2.0.jar"
+    else
+      wrapperUrl="https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.2.0/maven-wrapper-3.2.0.jar"
     fi
-    jarUrl="https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.4.0/maven-wrapper-0.4.0.jar"
-    while IFS="=" read key value; do
-      case "$key" in (wrapperUrl) jarUrl="$value"; break ;;
+    while IFS="=" read -r key value; do
+      # Remove '\r' from value to allow usage on windows as IFS does not consider '\r' as a separator ( considers space, tab, new line ('\n'), and custom '=' )
+      safeValue=$(echo "$value" | tr -d '\r')
+      case "$key" in (wrapperUrl) wrapperUrl="$safeValue"; break ;;
       esac
-    done < "$BASE_DIR/.mvn/wrapper/maven-wrapper.properties"
-    if [ "$MVNW_VERBOSE" = true ]; then
-      echo "Downloading from: $jarUrl"
+    done < "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.properties"
+    log "Downloading from: $wrapperUrl"
+
+    if $cygwin; then
+      wrapperJarPath=$(cygpath --path --windows "$wrapperJarPath")
     fi
-    wrapperJarPath="$BASE_DIR/.mvn/wrapper/maven-wrapper.jar"
 
     if command -v wget > /dev/null; then
-        if [ "$MVNW_VERBOSE" = true ]; then
-          echo "Found wget ... using wget"
+        log "Found wget ... using wget"
+        [ "$MVNW_VERBOSE" = true ] && QUIET="" || QUIET="--quiet"
+        if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
+            wget $QUIET "$wrapperUrl" -O "$wrapperJarPath" || rm -f "$wrapperJarPath"
+        else
+            wget $QUIET --http-user="$MVNW_USERNAME" --http-password="$MVNW_PASSWORD" "$wrapperUrl" -O "$wrapperJarPath" || rm -f "$wrapperJarPath"
         fi
-        wget "$jarUrl" -O "$wrapperJarPath"
     elif command -v curl > /dev/null; then
-        if [ "$MVNW_VERBOSE" = true ]; then
-          echo "Found curl ... using curl"
+        log "Found curl ... using curl"
+        [ "$MVNW_VERBOSE" = true ] && QUIET="" || QUIET="--silent"
+        if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
+            curl $QUIET -o "$wrapperJarPath" "$wrapperUrl" -f -L || rm -f "$wrapperJarPath"
+        else
+            curl $QUIET --user "$MVNW_USERNAME:$MVNW_PASSWORD" -o "$wrapperJarPath" "$wrapperUrl" -f -L || rm -f "$wrapperJarPath"
         fi
-        curl -o "$wrapperJarPath" "$jarUrl"
     else
-        if [ "$MVNW_VERBOSE" = true ]; then
-          echo "Falling back to using Java to download"
+        log "Falling back to using Java to download"
+        javaSource="$MAVEN_PROJECTBASEDIR/.mvn/wrapper/MavenWrapperDownloader.java"
+        javaClass="$MAVEN_PROJECTBASEDIR/.mvn/wrapper/MavenWrapperDownloader.class"
+        # For Cygwin, switch paths to Windows format before running javac
+        if $cygwin; then
+          javaSource=$(cygpath --path --windows "$javaSource")
+          javaClass=$(cygpath --path --windows "$javaClass")
         fi
-        javaClass="$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.java"
-        if [ -e "$javaClass" ]; then
-            if [ ! -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then
-                if [ "$MVNW_VERBOSE" = true ]; then
-                  echo " - Compiling MavenWrapperDownloader.java ..."
-                fi
-                # Compiling the Java class
-                ("$JAVA_HOME/bin/javac" "$javaClass")
+        if [ -e "$javaSource" ]; then
+            if [ ! -e "$javaClass" ]; then
+                log " - Compiling MavenWrapperDownloader.java ..."
+                ("$JAVA_HOME/bin/javac" "$javaSource")
             fi
-            if [ -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then
-                # Running the downloader
-                if [ "$MVNW_VERBOSE" = true ]; then
-                  echo " - Running MavenWrapperDownloader.java ..."
-                fi
-                ("$JAVA_HOME/bin/java" -cp .mvn/wrapper MavenWrapperDownloader "$MAVEN_PROJECTBASEDIR")
+            if [ -e "$javaClass" ]; then
+                log " - Running MavenWrapperDownloader.java ..."
+                ("$JAVA_HOME/bin/java" -cp .mvn/wrapper MavenWrapperDownloader "$wrapperUrl" "$wrapperJarPath") || rm -f "$wrapperJarPath"
             fi
         fi
     fi
@@ -259,48 +251,58 @@ fi
 # End of extension
 ##########################################################################################
 
-export MAVEN_PROJECTBASEDIR=${MAVEN_BASEDIR:-"$BASE_DIR"}
-if [ "$MVNW_VERBOSE" = true ]; then
-  echo $MAVEN_PROJECTBASEDIR
+# If specified, validate the SHA-256 sum of the Maven wrapper jar file
+wrapperSha256Sum=""
+while IFS="=" read -r key value; do
+  case "$key" in (wrapperSha256Sum) wrapperSha256Sum=$value; break ;;
+  esac
+done < "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.properties"
+if [ -n "$wrapperSha256Sum" ]; then
+  wrapperSha256Result=false
+  if command -v sha256sum > /dev/null; then
+    if echo "$wrapperSha256Sum  $wrapperJarPath" | sha256sum -c > /dev/null 2>&1; then
+      wrapperSha256Result=true
+    fi
+  elif command -v shasum > /dev/null; then
+    if echo "$wrapperSha256Sum  $wrapperJarPath" | shasum -a 256 -c > /dev/null 2>&1; then
+      wrapperSha256Result=true
+    fi
+  else
+    echo "Checksum validation was requested but neither 'sha256sum' or 'shasum' are available."
+    echo "Please install either command, or disable validation by removing 'wrapperSha256Sum' from your maven-wrapper.properties."
+    exit 1
+  fi
+  if [ $wrapperSha256Result = false ]; then
+    echo "Error: Failed to validate Maven wrapper SHA-256, your Maven wrapper might be compromised." >&2
+    echo "Investigate or delete $wrapperJarPath to attempt a clean download." >&2
+    echo "If you updated your Maven version, you need to update the specified wrapperSha256Sum property." >&2
+    exit 1
+  fi
 fi
+
 MAVEN_OPTS="$(concat_lines "$MAVEN_PROJECTBASEDIR/.mvn/jvm.config") $MAVEN_OPTS"
 
 # For Cygwin, switch paths to Windows format before running java
 if $cygwin; then
-  [ -n "$M2_HOME" ] &&
-    M2_HOME=`cygpath --path --windows "$M2_HOME"`
   [ -n "$JAVA_HOME" ] &&
-    JAVA_HOME=`cygpath --path --windows "$JAVA_HOME"`
+    JAVA_HOME=$(cygpath --path --windows "$JAVA_HOME")
   [ -n "$CLASSPATH" ] &&
-    CLASSPATH=`cygpath --path --windows "$CLASSPATH"`
+    CLASSPATH=$(cygpath --path --windows "$CLASSPATH")
   [ -n "$MAVEN_PROJECTBASEDIR" ] &&
-    MAVEN_PROJECTBASEDIR=`cygpath --path --windows "$MAVEN_PROJECTBASEDIR"`
+    MAVEN_PROJECTBASEDIR=$(cygpath --path --windows "$MAVEN_PROJECTBASEDIR")
 fi
 
+# Provide a "standardized" way to retrieve the CLI args that will
+# work with both Windows and non-Windows executions.
+MAVEN_CMD_LINE_ARGS="$MAVEN_CONFIG $*"
+export MAVEN_CMD_LINE_ARGS
+
 WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
 
-echo "Running version check"
-VERSION=$( sed '\!<parent!,\!</parent!d' `dirname $0`/pom.xml | grep '<version' | head -1 | sed -e 's/.*<version>//' -e 's!</version>.*$!!' )
-echo "The found version is [${VERSION}]"
-
-if echo $VERSION | egrep -q 'M|RC'; then
-    echo Activating \"milestone\" profile for version=\"$VERSION\"
-    echo $MAVEN_CONFIG | grep -q milestone || MAVEN_CONFIG="$MAVEN_CONFIG -Pmilestone"
-else
-    echo Deactivating \"milestone\" profile for version=\"$VERSION\"
-    echo $MAVEN_CONFIG | grep -q milestone && MAVEN_CONFIG=$(echo $MAVEN_CONFIG | sed -e 's/-Pmilestone//')
-fi
-
-if echo $VERSION | egrep -q 'RELEASE'; then
-    echo Activating \"central\" profile for version=\"$VERSION\"
-    echo $MAVEN_CONFIG | grep -q milestone || MAVEN_CONFIG="$MAVEN_CONFIG -Pcentral"
-else
-    echo Deactivating \"central\" profile for version=\"$VERSION\"
-    echo $MAVEN_CONFIG | grep -q central && MAVEN_CONFIG=$(echo $MAVEN_CONFIG | sed -e 's/-Pcentral//')
-fi
-
+# shellcheck disable=SC2086 # safe args
 exec "$JAVACMD" \
   $MAVEN_OPTS \
+  $MAVEN_DEBUG_OPTS \
   -classpath "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.jar" \
-  "-Dmaven.home=${M2_HOME}" "-Dmaven.multiModuleProjectDirectory=${MAVEN_PROJECTBASEDIR}" \
+  "-Dmaven.multiModuleProjectDirectory=${MAVEN_PROJECTBASEDIR}" \
   ${WRAPPER_LAUNCHER} $MAVEN_CONFIG "$@"

mvnw.cmd

@@ -7,7 +7,7 @@
 @REM "License"); you may not use this file except in compliance
 @REM with the License.  You may obtain a copy of the License at
 @REM
-@REM    https://www.apache.org/licenses/LICENSE-2.0
+@REM    http://www.apache.org/licenses/LICENSE-2.0
 @REM
 @REM Unless required by applicable law or agreed to in writing,
 @REM software distributed under the License is distributed on an
@@ -18,15 +18,14 @@
 @REM ----------------------------------------------------------------------------
 
 @REM ----------------------------------------------------------------------------
-@REM Maven2 Start Up Batch script
+@REM Apache Maven Wrapper startup batch script, version 3.2.0
 @REM
 @REM Required ENV vars:
 @REM JAVA_HOME - location of a JDK home dir
 @REM
 @REM Optional ENV vars
-@REM M2_HOME - location of maven2's installed home dir
 @REM MAVEN_BATCH_ECHO - set to 'on' to enable the echoing of the batch commands
-@REM MAVEN_BATCH_PAUSE - set to 'on' to wait for a key stroke before ending
+@REM MAVEN_BATCH_PAUSE - set to 'on' to wait for a keystroke before ending
 @REM MAVEN_OPTS - parameters passed to the Java VM when running Maven
 @REM     e.g. to debug Maven itself, use
 @REM set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
@@ -37,7 +36,7 @@
 @echo off
 @REM set title of command window
 title %0
-@REM enable echoing my setting MAVEN_BATCH_ECHO to 'on'
+@REM enable echoing by setting MAVEN_BATCH_ECHO to 'on'
 @if "%MAVEN_BATCH_ECHO%" == "on"  echo %MAVEN_BATCH_ECHO%
 
 @REM set %HOME% to equivalent of $HOME
@@ -46,8 +45,8 @@ if "%HOME%" == "" (set "HOME=%HOMEDRIVE%%HOMEPATH%")
 @REM Execute a user defined script before this one
 if not "%MAVEN_SKIP_RC%" == "" goto skipRcPre
 @REM check for pre script, once with legacy .bat ending and once with .cmd ending
-if exist "%HOME%\mavenrc_pre.bat" call "%HOME%\mavenrc_pre.bat"
-if exist "%HOME%\mavenrc_pre.cmd" call "%HOME%\mavenrc_pre.cmd"
+if exist "%USERPROFILE%\mavenrc_pre.bat" call "%USERPROFILE%\mavenrc_pre.bat" %*
+if exist "%USERPROFILE%\mavenrc_pre.cmd" call "%USERPROFILE%\mavenrc_pre.cmd" %*
 :skipRcPre
 
 @setlocal
@@ -120,24 +119,69 @@ SET MAVEN_JAVA_EXE="%JAVA_HOME%\bin\java.exe"
 set WRAPPER_JAR="%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.jar"
 set WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
 
-set DOWNLOAD_URL="https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.4.0/maven-wrapper-0.4.0.jar"
-FOR /F "tokens=1,2 delims==" %%A IN (%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.properties) DO (
-	IF "%%A"=="wrapperUrl" SET DOWNLOAD_URL=%%B 
+set WRAPPER_URL="https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.2.0/maven-wrapper-3.2.0.jar"
+
+FOR /F "usebackq tokens=1,2 delims==" %%A IN ("%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.properties") DO (
+    IF "%%A"=="wrapperUrl" SET WRAPPER_URL=%%B
 )
 
 @REM Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
 @REM This allows using the maven wrapper in projects that prohibit checking in binary data.
 if exist %WRAPPER_JAR% (
-    echo Found %WRAPPER_JAR%
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Found %WRAPPER_JAR%
+    )
 ) else (
-    echo Couldn't find %WRAPPER_JAR%, downloading it ...
-	echo Downloading from: %DOWNLOAD_URL%
-    powershell -Command "(New-Object Net.WebClient).DownloadFile('%DOWNLOAD_URL%', '%WRAPPER_JAR%')"
-    echo Finished downloading %WRAPPER_JAR%
+    if not "%MVNW_REPOURL%" == "" (
+        SET WRAPPER_URL="%MVNW_REPOURL%/org/apache/maven/wrapper/maven-wrapper/3.2.0/maven-wrapper-3.2.0.jar"
+    )
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Couldn't find %WRAPPER_JAR%, downloading it ...
+        echo Downloading from: %WRAPPER_URL%
+    )
+
+    powershell -Command "&{"^
+		"$webclient = new-object System.Net.WebClient;"^
+		"if (-not ([string]::IsNullOrEmpty('%MVNW_USERNAME%') -and [string]::IsNullOrEmpty('%MVNW_PASSWORD%'))) {"^
+		"$webclient.Credentials = new-object System.Net.NetworkCredential('%MVNW_USERNAME%', '%MVNW_PASSWORD%');"^
+		"}"^
+		"[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; $webclient.DownloadFile('%WRAPPER_URL%', '%WRAPPER_JAR%')"^
+		"}"
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Finished downloading %WRAPPER_JAR%
+    )
 )
 @REM End of extension
 
-%MAVEN_JAVA_EXE% %JVM_CONFIG_MAVEN_PROPS% %MAVEN_OPTS% %MAVEN_DEBUG_OPTS% -classpath %WRAPPER_JAR% "-Dmaven.multiModuleProjectDirectory=%MAVEN_PROJECTBASEDIR%" %WRAPPER_LAUNCHER% %MAVEN_CONFIG% %*
+@REM If specified, validate the SHA-256 sum of the Maven wrapper jar file
+SET WRAPPER_SHA_256_SUM=""
+FOR /F "usebackq tokens=1,2 delims==" %%A IN ("%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.properties") DO (
+    IF "%%A"=="wrapperSha256Sum" SET WRAPPER_SHA_256_SUM=%%B
+)
+IF NOT %WRAPPER_SHA_256_SUM%=="" (
+    powershell -Command "&{"^
+       "$hash = (Get-FileHash \"%WRAPPER_JAR%\" -Algorithm SHA256).Hash.ToLower();"^
+       "If('%WRAPPER_SHA_256_SUM%' -ne $hash){"^
+       "  Write-Output 'Error: Failed to validate Maven wrapper SHA-256, your Maven wrapper might be compromised.';"^
+       "  Write-Output 'Investigate or delete %WRAPPER_JAR% to attempt a clean download.';"^
+       "  Write-Output 'If you updated your Maven version, you need to update the specified wrapperSha256Sum property.';"^
+       "  exit 1;"^
+       "}"^
+       "}"
+    if ERRORLEVEL 1 goto error
+)
+
+@REM Provide a "standardized" way to retrieve the CLI args that will
+@REM work with both Windows and non-Windows executions.
+set MAVEN_CMD_LINE_ARGS=%*
+
+%MAVEN_JAVA_EXE% ^
+  %JVM_CONFIG_MAVEN_PROPS% ^
+  %MAVEN_OPTS% ^
+  %MAVEN_DEBUG_OPTS% ^
+  -classpath %WRAPPER_JAR% ^
+  "-Dmaven.multiModuleProjectDirectory=%MAVEN_PROJECTBASEDIR%" ^
+  %WRAPPER_LAUNCHER% %MAVEN_CONFIG% %*
 if ERRORLEVEL 1 goto error
 goto end
 
@@ -147,15 +191,15 @@ set ERROR_CODE=1
 :end
 @endlocal & set ERROR_CODE=%ERROR_CODE%
 
-if not "%MAVEN_SKIP_RC%" == "" goto skipRcPost
+if not "%MAVEN_SKIP_RC%"=="" goto skipRcPost
 @REM check for post script, once with legacy .bat ending and once with .cmd ending
-if exist "%HOME%\mavenrc_post.bat" call "%HOME%\mavenrc_post.bat"
-if exist "%HOME%\mavenrc_post.cmd" call "%HOME%\mavenrc_post.cmd"
+if exist "%USERPROFILE%\mavenrc_post.bat" call "%USERPROFILE%\mavenrc_post.bat"
+if exist "%USERPROFILE%\mavenrc_post.cmd" call "%USERPROFILE%\mavenrc_post.cmd"
 :skipRcPost
 
 @REM pause the script if MAVEN_BATCH_PAUSE is set to 'on'
-if "%MAVEN_BATCH_PAUSE%" == "on" pause
+if "%MAVEN_BATCH_PAUSE%"=="on" pause
 
-if "%MAVEN_TERMINATE_CMD%" == "on" exit %ERROR_CODE%
+if "%MAVEN_TERMINATE_CMD%"=="on" exit %ERROR_CODE%
 
-exit /B %ERROR_CODE%
+cmd /C exit /B %ERROR_CODE%

pom.xml

@@ -3,14 +3,15 @@
 	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-netflix</artifactId>
-	<version>4.0.4-SNAPSHOT</version>
+	<version>4.3.2</version>
 	<packaging>pom</packaging>
 	<name>Spring Cloud Netflix</name>
 	<description>Spring Cloud Netflix</description>
+	<url>https://github.com/spring-cloud/spring-cloud-netflix</url>
 	<parent>
 		<groupId>org.springframework.cloud</groupId>
 		<artifactId>spring-cloud-build</artifactId>
-		<version>4.0.6-SNAPSHOT</version>
+		<version>4.3.3</version>
 		<relativePath />
 	</parent>
 	<scm>
@@ -19,11 +20,69 @@
 		<developerConnection>scm:git:ssh://git@github.com/spring-cloud/spring-cloud-netflix.git</developerConnection>
 		<tag>HEAD</tag>
 	</scm>
+	<licenses>
+		<license>
+			<name>Apache License, Version 2.0</name>
+			<url>https://www.apache.org/licenses/LICENSE-2.0</url>
+		</license>
+	</licenses>
+	<developers>
+		<developer>
+			<id>dsyer</id>
+			<name>Dave Syer</name>
+			<email>david.syer at broadcom.com</email>
+			<organization>Broadcom, Inc.</organization>
+			<organizationUrl>https://www.spring.io</organizationUrl>
+			<roles>
+				<role>lead</role>
+			</roles>
+		</developer>
+		<developer>
+			<id>sgibb</id>
+			<name>Spencer Gibb</name>
+			<email>spencer.gibb at broadcom.com</email>
+			<organization>Broadcom, Inc.</organization>
+			<organizationUrl>https://www.spring.io</organizationUrl>
+			<roles>
+				<role>lead</role>
+			</roles>
+		</developer>
+		<developer>
+			<id>mgrzejszczak</id>
+			<name>Marcin Grzejszczak</name>
+			<email>>marcin.grzejszczak at broadcom.com</email>
+			<organization>Broadcom, Inc.</organization>
+			<organizationUrl>https://www.spring.io</organizationUrl>
+			<roles>
+				<role>developer</role>
+			</roles>
+		</developer>
+		<developer>
+			<id>rbaxter</id>
+			<name>Ryan Baxter</name>
+			<email>ryan.baxter at broadcom.com</email>
+			<organization>Broadcom, Inc.</organization>
+			<organizationUrl>https://www.spring.io</organizationUrl>
+			<roles>
+				<role>developer</role>
+			</roles>
+		</developer>
+		<developer>
+			<id>omaciaszeksharma</id>
+			<name>Olga Maciaszek-Sharma</name>
+			<email>olga.maciaszek-sharma at broadcom.com</email>
+			<organization>Broadcom, Inc.</organization>
+			<organizationUrl>https://www.spring.io</organizationUrl>
+			<roles>
+				<role>developer</role>
+			</roles>
+		</developer>
+	</developers>
 	<properties>
 		<bintray.package>netflix</bintray.package>
-		<spring-cloud-commons.version>4.0.5-SNAPSHOT</spring-cloud-commons.version>
-		<spring-cloud-config.version>4.0.5-SNAPSHOT</spring-cloud-config.version>
-		<testcontainers.version>1.17.6</testcontainers.version>
+		<spring-cloud-commons.version>4.3.2</spring-cloud-commons.version>
+		<spring-cloud-config.version>4.3.2</spring-cloud-config.version>
+		<testcontainers.version>1.21.4</testcontainers.version>
 		<mockserverclient.version>5.15.0</mockserverclient.version>
 
 		<!-- Sonar -->
@@ -32,8 +91,6 @@
 		<sonar.jacoco.reportPath>${project.basedir}/../target/jacoco.exec</sonar.jacoco.reportPath>
 		<sonar.language>java</sonar.language>
 		<maven-resources-plugin.version>3.1.0</maven-resources-plugin.version>
-		<!-- FIXME: 4.0.0 -->
-		<duplicate-finder-maven-plugin.skip>true</duplicate-finder-maven-plugin.skip>
 	</properties>
 	<build>
 		<plugins>
@@ -132,6 +189,12 @@
 				<groupId>org.mock-server</groupId>
 				<artifactId>mockserver-client-java</artifactId>
 				<version>${mockserverclient.version}</version>
+				<exclusions>
+					<exclusion>
+						<groupId>commons-logging</groupId>
+						<artifactId>commons-logging</artifactId>
+					</exclusion>
+				</exclusions>
 			</dependency>
 		</dependencies>
 	</dependencyManagement>
@@ -153,13 +216,29 @@
 		<module>docs</module>
     </modules>
 	<profiles>
+		<profile>
+			<id>central</id>
+			<build>
+				<plugins>
+					<plugin>
+						<groupId>org.sonatype.central</groupId>
+						<artifactId>central-publishing-maven-plugin</artifactId>
+						<configuration>
+							<excludeArtifacts>
+								<artifact>spring-cloud-netflix-eureka-client-tls-tests</artifact>
+							</excludeArtifacts>
+						</configuration>
+					</plugin>
+				</plugins>
+			</build>
+		</profile>
 		<profile>
 			<id>spring</id>
 			<repositories>
 				<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>
@@ -170,7 +249,7 @@
 				<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>
@@ -188,7 +267,7 @@
 				<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>
@@ -199,7 +278,7 @@
 				<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>
@@ -207,7 +286,7 @@
 				<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-netflix-dependencies/pom.xml

@@ -5,16 +5,16 @@
 	<parent>
 		<artifactId>spring-cloud-dependencies-parent</artifactId>
 		<groupId>org.springframework.cloud</groupId>
-		<version>4.0.6-SNAPSHOT</version>
+		<version>4.3.3</version>
 		<relativePath/>
 	</parent>
 	<artifactId>spring-cloud-netflix-dependencies</artifactId>
-	<version>4.0.4-SNAPSHOT</version>
+	<version>4.3.2</version>
 	<packaging>pom</packaging>
 	<name>spring-cloud-netflix-dependencies</name>
 	<description>Spring Cloud Netflix Dependencies</description>
 	<properties>
-		<eureka.version>2.0.1</eureka.version>
+		<eureka.version>2.0.6</eureka.version>
 	</properties>
 	<dependencyManagement>
 		<dependencies>
@@ -43,6 +43,10 @@
 				<artifactId>eureka-client</artifactId>
 				<version>${eureka.version}</version>
 				<exclusions>
+					<exclusion>
+						<groupId>com.google.guava</groupId>
+						<artifactId>guava</artifactId>
+					</exclusion>
 					<exclusion>
 						<groupId>com.netflix.archaius</groupId>
 						<artifactId>archaius-core</artifactId>
@@ -51,10 +55,18 @@
 						<groupId>com.github.vlsi.compactmap</groupId>
 						<artifactId>compactmap</artifactId>
 					</exclusion>
+					<exclusion>
+						<groupId>jakarta.servlet</groupId>
+						<artifactId>jakarta.servlet-api</artifactId>
+					</exclusion>
 					<exclusion>
 						<groupId>javax.servlet</groupId>
 						<artifactId>servlet-api</artifactId>
 					</exclusion>
+					<exclusion>
+						<artifactId>commons-configuration</artifactId>
+						<groupId>commons-configuration</groupId>
+					</exclusion>
 					<exclusion>
 						<artifactId>commons-logging</artifactId>
 						<groupId>commons-logging</groupId>
@@ -82,6 +94,10 @@
 						<groupId>com.netflix.archaius</groupId>
 						<artifactId>archaius-core</artifactId>
 					</exclusion>
+					<exclusion>
+						<groupId>jakarta.servlet</groupId>
+						<artifactId>jakarta.servlet-api</artifactId>
+					</exclusion>
 					<exclusion>
 						<groupId>javax.servlet</groupId>
 						<artifactId>servlet-api</artifactId>
@@ -130,9 +146,12 @@
 						<groupId>aopalliance</groupId>
 						<artifactId>aopalliance</artifactId>
 					</exclusion>
+					<exclusion>
+						<groupId>commons-logging</groupId>
+						<artifactId>commons-logging</artifactId>
+					</exclusion>
 				</exclusions>
 			</dependency>
-			<!--			TODO: Move back to Eureka dependency when 1.10.17 released -->
 		</dependencies>
 	</dependencyManagement>
 	<profiles>
@@ -142,7 +161,7 @@
 				<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>
@@ -153,7 +172,7 @@
 				<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>
@@ -171,7 +190,7 @@
 				<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>
@@ -182,7 +201,7 @@
 				<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>

spring-cloud-netflix-eureka-client-tls-tests/pom.xml

@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>org.springframework.cloud</groupId>
 		<artifactId>spring-cloud-netflix</artifactId>
-		<version>4.0.4-SNAPSHOT</version>
+		<version>4.3.2</version>
 		<relativePath>..</relativePath> <!-- lookup parent from repository -->
 	</parent>
 	<artifactId>spring-cloud-netflix-eureka-client-tls-tests</artifactId>
@@ -92,16 +92,21 @@
 			<artifactId>spring-boot-starter-test</artifactId>
 			<scope>test</scope>
 		</dependency>
-		
 		<dependency>
-			<groupId>org.junit.vintage</groupId>
-			<artifactId>junit-vintage-engine</artifactId>
+			<groupId>org.junit.platform</groupId>
+			<artifactId>junit-platform-suite-api</artifactId>
 			<scope>test</scope>
 		</dependency>
+		<dependency>
+			<groupId>org.junit.platform</groupId>
+			<artifactId>junit-platform-suite-engine</artifactId>
+			<scope>test</scope>
+		</dependency>
+
 		<dependency>
 			<groupId>org.bouncycastle</groupId>
 			<artifactId>bcpkix-jdk15on</artifactId>
-			<version>1.68</version>
+			<version>1.70</version>
 			<scope>test</scope>
 		</dependency>
 	</dependencies>

spring-cloud-netflix-eureka-client-tls-tests/src/test/java/org/springframework/cloud/netflix/eureka/AppRunner.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2018-2022 the original author or authors.
+ * Copyright 2018-present 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.
@@ -48,14 +48,14 @@ public class AppRunner implements AutoCloseable {
 			SpringApplicationBuilder builder = new SpringApplicationBuilder(appClass);
 			builder.properties("spring.application.name=" + appClass.getName());
 			builder.properties("spring.jmx.enabled=false");
-			builder.properties(String.format("server.port=%d", availabeTcpPort()));
+			builder.properties(String.format("server.port=%d", availableTcpPort()));
 			builder.properties(props());
 
 			app = builder.build().run();
 		}
 	}
 
-	private int availabeTcpPort() {
+	private int availableTcpPort() {
 		return TestSocketUtils.findAvailableTcpPort();
 	}
 

spring-cloud-netflix-eureka-client-tls-tests/src/test/java/org/springframework/cloud/netflix/eureka/BaseCertTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2018-2022 the original author or authors.
+ * Copyright 2018-present 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.
@@ -25,17 +25,17 @@ import java.util.function.Supplier;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.junit.jupiter.api.AfterAll;
-import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.Test;
 
 import org.springframework.beans.factory.BeanCreationException;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
 
-abstract class BaseCertTest {
+abstract class BaseCertTests {
 
-	private static final Log log = LogFactory.getLog(BaseCertTest.class);
+	private static final Log log = LogFactory.getLog(BaseCertTests.class);
 
 	protected static final String KEY_STORE_PASSWORD = "test-key-store-password";
 
@@ -53,7 +53,7 @@ abstract class BaseCertTest {
 
 	protected static File wrongClientCert;
 
-	protected BaseCertTest() {
+	protected BaseCertTests() {
 	}
 
 	@SuppressWarnings("rawtypes")
@@ -155,15 +155,7 @@ abstract class BaseCertTest {
 		EurekaClientRunner client = createEurekaClient();
 		enableTlsClient(client);
 		client.setKeyStore(clientCert, WRONG_PASSWORD, WRONG_PASSWORD);
-		Assertions.assertThrows(BeanCreationException.class, client::start);
-	}
-
-	@Test
-	void nonExistKeyStoreCauseFailure() {
-		EurekaClientRunner client = createEurekaClient();
-		enableTlsClient(client);
-		client.setKeyStore(new File("nonExistFile"));
-		Assertions.assertThrows(BeanCreationException.class, client::start);
+		assertThatExceptionOfType(BeanCreationException.class).isThrownBy(client::start);
 	}
 
 	@Test

spring-cloud-netflix-eureka-client-tls-tests/src/test/java/org/springframework/cloud/netflix/eureka/EurekaClientRunner.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2018-2022 the original author or authors.
+ * Copyright 2018-present 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-netflix-eureka-client-tls-tests/src/test/java/org/springframework/cloud/netflix/eureka/EurekaClientSuite.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2018-2022 the original author or authors.
+ * Copyright 2018-present 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.
@@ -16,8 +16,8 @@
 
 package org.springframework.cloud.netflix.eureka;
 
-import org.junit.runner.RunWith;
-import org.junit.runners.Suite;
+import org.junit.platform.suite.api.SelectClasses;
+import org.junit.platform.suite.api.Suite;
 
 /**
  * We need to use a suite cause we need to first run all the Eureka Servers, then close
@@ -26,8 +26,8 @@ import org.junit.runners.Suite;
  * That means that when the new context starts we will fail cause the executor service is
  * already shutdown.
  */
-@RunWith(Suite.class)
-@Suite.SuiteClasses({ EurekaClientTest.class, RestTemplateEurekaClientTest.class })
+@SelectClasses({ EurekaClientTests.class, RestTemplateEurekaClientTests.class })
+@Suite
 public class EurekaClientSuite {
 
 }

spring-cloud-netflix-eureka-client-tls-tests/src/test/java/org/springframework/cloud/netflix/eureka/EurekaClientTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2018-2022 the original author or authors.
+ * Copyright 2018-present 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.
@@ -16,20 +16,25 @@
 
 package org.springframework.cloud.netflix.eureka;
 
+import java.util.Collections;
+
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.junit.jupiter.api.BeforeAll;
 
 import org.springframework.boot.SpringBootConfiguration;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.cloud.netflix.eureka.http.DefaultEurekaClientHttpRequestFactorySupplier;
 import org.springframework.cloud.netflix.eureka.http.RestTemplateDiscoveryClientOptionalArgs;
+import org.springframework.cloud.netflix.eureka.http.RestTemplateTransportClientFactories;
 import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
+import org.springframework.context.annotation.Bean;
 
 import static org.assertj.core.api.Assertions.assertThat;
 
-public class EurekaClientTest extends BaseCertTest {
+public class EurekaClientTests extends BaseCertTests {
 
-	private static final Log log = LogFactory.getLog(EurekaClientTest.class);
+	private static final Log LOG = LogFactory.getLog(EurekaClientTests.class);
 
 	static EurekaServerRunner server;
 
@@ -37,11 +42,11 @@ public class EurekaClientTest extends BaseCertTest {
 
 	@BeforeAll
 	public static void setupAll() {
-		server = startEurekaServer(EurekaClientTest.TestEurekaServer.class);
-		service = startService(server, EurekaClientTest.TestApp.class);
+		server = startEurekaServer(EurekaClientTests.TestEurekaServer.class);
+		service = startService(server, EurekaClientTests.TestApp.class);
 		assertThat(service.discoveryClientOptionalArgs()).isInstanceOf(RestTemplateDiscoveryClientOptionalArgs.class);
-		log.info("Successfully asserted that Jersey will be used");
-		waitForRegistration(() -> new EurekaClientTest().createEurekaClient());
+		LOG.info("Successfully asserted that Jersey will be used");
+		waitForRegistration(() -> new EurekaClientTests().createEurekaClient());
 	}
 
 	@Override
@@ -53,6 +58,18 @@ public class EurekaClientTest extends BaseCertTest {
 	@EnableAutoConfiguration
 	public static class TestApp {
 
+		@Bean
+		public RestTemplateTransportClientFactories forceRestTemplateTransportClientFactories(
+				RestTemplateDiscoveryClientOptionalArgs discoveryClientOptionalArgs) {
+			return new RestTemplateTransportClientFactories(discoveryClientOptionalArgs);
+		}
+
+		@Bean
+		public RestTemplateDiscoveryClientOptionalArgs discoveryClientOptionalArgs() {
+			return new RestTemplateDiscoveryClientOptionalArgs(new DefaultEurekaClientHttpRequestFactorySupplier(
+					new RestTemplateTimeoutProperties(), Collections.emptySet()));
+		}
+
 	}
 
 	@SpringBootConfiguration

spring-cloud-netflix-eureka-client-tls-tests/src/test/java/org/springframework/cloud/netflix/eureka/EurekaServerRunner.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2018-2022 the original author or authors.
+ * Copyright 2018-present 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-netflix-eureka-client-tls-tests/src/test/java/org/springframework/cloud/netflix/eureka/KeyAndCert.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2018-2022 the original author or authors.
+ * Copyright 2018-present 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-netflix-eureka-client-tls-tests/src/test/java/org/springframework/cloud/netflix/eureka/KeyTool.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2018-2022 the original author or authors.
+ * Copyright 2018-present 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-netflix-eureka-client-tls-tests/src/test/java/org/springframework/cloud/netflix/eureka/RestClientEurekaClientTests.java

@@ -0,0 +1,106 @@
+/*
+ * Copyright 2018-present 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.netflix.eureka;
+
+import java.io.IOException;
+import java.security.GeneralSecurityException;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeAll;
+
+import org.springframework.boot.SpringBootConfiguration;
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.cloud.configuration.TlsProperties;
+import org.springframework.cloud.netflix.eureka.http.EurekaClientHttpRequestFactorySupplier;
+import org.springframework.cloud.netflix.eureka.http.RestClientDiscoveryClientOptionalArgs;
+import org.springframework.cloud.netflix.eureka.http.RestClientTransportClientFactories;
+import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
+import org.springframework.context.annotation.Bean;
+import org.springframework.web.client.RestClient;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.springframework.cloud.netflix.eureka.config.DiscoveryClientOptionalArgsConfiguration.setupTLS;
+
+/**
+ * Tests for verifying TLS setup with {@link RestClientTransportClientFactories}.
+ *
+ * @author Olga Maciaszek-Sharma
+ */
+public class RestClientEurekaClientTests extends BaseCertTests {
+
+	private static final Log LOG = LogFactory.getLog(RestClientEurekaClientTests.class);
+
+	private static EurekaServerRunner server;
+
+	private static EurekaClientRunner service;
+
+	@BeforeAll
+	public static void setupAll() {
+		server = startEurekaServer(TestEurekaServer.class);
+		service = startService(server, TestApp.class);
+		// Will use RestClient
+		assertThat(service.discoveryClientOptionalArgs()).isInstanceOf(RestClientDiscoveryClientOptionalArgs.class);
+		LOG.info("Successfully asserted that RestClient will be used");
+		waitForRegistration(() -> new RestClientEurekaClientTests().createEurekaClient());
+	}
+
+	@AfterAll
+	public static void tearDownAll() {
+		stopService(service);
+		stopEurekaServer(server);
+	}
+
+	@Override
+	EurekaClientRunner createEurekaClient() {
+		return new EurekaClientRunner(TestApp.class, server);
+	}
+
+	@SpringBootConfiguration
+	@EnableAutoConfiguration
+	public static class TestApp {
+
+		// Want to force reusing exactly the same bean as on production without excluding
+		// jersey from the classpath
+		@Bean
+		public RestClientDiscoveryClientOptionalArgs forceRestClientDiscoveryClientOptionalArgs(
+				TlsProperties tlsProperties,
+				EurekaClientHttpRequestFactorySupplier eurekaClientHttpRequestFactorySupplier)
+				throws GeneralSecurityException, IOException {
+			RestClientDiscoveryClientOptionalArgs result = new RestClientDiscoveryClientOptionalArgs(
+					eurekaClientHttpRequestFactorySupplier, RestClient::builder);
+			setupTLS(result, tlsProperties);
+			return result;
+		}
+
+		@Bean
+		public RestClientTransportClientFactories forceRestClientTransportClientFactories(
+				RestClientDiscoveryClientOptionalArgs discoveryClientOptionalArgs) {
+			return new RestClientTransportClientFactories(discoveryClientOptionalArgs);
+		}
+
+	}
+
+	@SpringBootConfiguration
+	@EnableAutoConfiguration
+	@EnableEurekaServer
+	public static class TestEurekaServer {
+
+	}
+
+}

spring-cloud-netflix-eureka-client-tls-tests/src/test/java/org/springframework/cloud/netflix/eureka/RestTemplateEurekaClientTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2018-2022 the original author or authors.
+ * Copyright 2018-present 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.
@@ -26,18 +26,21 @@ import org.junit.jupiter.api.BeforeAll;
 
 import org.springframework.boot.SpringBootConfiguration;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.boot.web.client.RestTemplateBuilder;
 import org.springframework.cloud.configuration.TlsProperties;
-import org.springframework.cloud.netflix.eureka.config.DiscoveryClientOptionalArgsConfiguration;
+import org.springframework.cloud.netflix.eureka.http.DefaultEurekaClientHttpRequestFactorySupplier;
 import org.springframework.cloud.netflix.eureka.http.EurekaClientHttpRequestFactorySupplier;
 import org.springframework.cloud.netflix.eureka.http.RestTemplateDiscoveryClientOptionalArgs;
+import org.springframework.cloud.netflix.eureka.http.RestTemplateTransportClientFactories;
 import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
 import org.springframework.context.annotation.Bean;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.springframework.cloud.netflix.eureka.config.DiscoveryClientOptionalArgsConfiguration.setupTLS;
 
-public class RestTemplateEurekaClientTest extends BaseCertTest {
+public class RestTemplateEurekaClientTests extends BaseCertTests {
 
-	private static final Log log = LogFactory.getLog(RestTemplateEurekaClientTest.class);
+	private static final Log log = LogFactory.getLog(RestTemplateEurekaClientTests.class);
 
 	private static EurekaServerRunner server;
 
@@ -45,12 +48,12 @@ public class RestTemplateEurekaClientTest extends BaseCertTest {
 
 	@BeforeAll
 	public static void setupAll() {
-		server = startEurekaServer(RestTemplateEurekaClientTest.RestTemplateTestEurekaServer.class);
-		service = startService(server, RestTemplateEurekaClientTest.RestTemplateTestApp.class);
+		server = startEurekaServer(TestEurekaServer.class);
+		service = startService(server, RestTemplateEurekaClientTests.RestTemplateTestApp.class);
 		// Will use RestTemplate
 		assertThat(service.discoveryClientOptionalArgs()).isInstanceOf(RestTemplateDiscoveryClientOptionalArgs.class);
 		log.info("Successfully asserted that RestTemplate will be used");
-		waitForRegistration(() -> new RestTemplateEurekaClientTest().createEurekaClient());
+		waitForRegistration(() -> new RestTemplateEurekaClientTests().createEurekaClient());
 	}
 
 	@AfterAll
@@ -68,15 +71,27 @@ public class RestTemplateEurekaClientTest extends BaseCertTest {
 	@EnableAutoConfiguration
 	public static class RestTemplateTestApp {
 
-		// Want to force reusing exactly the same bean as on production without excluding
-		// jersey from the classpath
 		@Bean
 		public RestTemplateDiscoveryClientOptionalArgs forceRestTemplateDiscoveryClientOptionalArgs(
-				TlsProperties tlsProperties, DiscoveryClientOptionalArgsConfiguration configuration,
+				TlsProperties tlsProperties,
 				EurekaClientHttpRequestFactorySupplier eurekaClientHttpRequestFactorySupplier)
 				throws GeneralSecurityException, IOException {
-			return configuration.restTemplateDiscoveryClientOptionalArgs(tlsProperties,
-					eurekaClientHttpRequestFactorySupplier);
+			RestTemplateDiscoveryClientOptionalArgs result = new RestTemplateDiscoveryClientOptionalArgs(
+					eurekaClientHttpRequestFactorySupplier, RestTemplateBuilder::new);
+			setupTLS(result, tlsProperties);
+			return result;
+		}
+
+		@Bean
+		public RestTemplateTransportClientFactories forceRestTemplateTransportClientFactories(
+				RestTemplateDiscoveryClientOptionalArgs discoveryClientOptionalArgs) {
+			return new RestTemplateTransportClientFactories(discoveryClientOptionalArgs);
+		}
+
+		@Bean
+		EurekaClientHttpRequestFactorySupplier defaultEurekaClientHttpRequestFactorySupplier(
+				RestTemplateTimeoutProperties restTemplateTimeoutProperties) {
+			return new DefaultEurekaClientHttpRequestFactorySupplier(restTemplateTimeoutProperties);
 		}
 
 	}
@@ -84,7 +99,7 @@ public class RestTemplateEurekaClientTest extends BaseCertTest {
 	@SpringBootConfiguration
 	@EnableAutoConfiguration
 	@EnableEurekaServer
-	public static class RestTemplateTestEurekaServer {
+	public static class TestEurekaServer {
 
 	}
 

spring-cloud-netflix-eureka-client/pom.xml

@@ -6,7 +6,7 @@
 	<parent>
 		<groupId>org.springframework.cloud</groupId>
 		<artifactId>spring-cloud-netflix</artifactId>
-		<version>4.0.4-SNAPSHOT</version>
+		<version>4.3.2</version>
 		<relativePath>..</relativePath> <!-- lookup parent from repository -->
 	</parent>
 	<artifactId>spring-cloud-netflix-eureka-client</artifactId>
@@ -82,11 +82,6 @@
 			<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>

spring-cloud-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/CloudEurekaClient.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2022 the original author or authors.
+ * Copyright 2013-present 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-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/CloudEurekaInstanceConfig.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2022 the original author or authors.
+ * Copyright 2013-present 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-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/CloudEurekaTransportConfig.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2022 the original author or authors.
+ * Copyright 2013-present 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.
@@ -193,20 +193,43 @@ public class CloudEurekaTransportConfig implements EurekaTransportConfig {
 	@Override
 	public String toString() {
 		return new StringBuilder("CloudEurekaTransportConfig{").append("sessionedClientReconnectIntervalSeconds=")
-				.append(sessionedClientReconnectIntervalSeconds).append(", ")
-				.append("retryableClientQuarantineRefreshPercentage=")
-				.append(retryableClientQuarantineRefreshPercentage).append(", ")
-				.append("bootstrapResolverRefreshIntervalSeconds=").append(bootstrapResolverRefreshIntervalSeconds)
-				.append(", ").append("applicationsResolverDataStalenessThresholdSeconds=")
-				.append(applicationsResolverDataStalenessThresholdSeconds).append(", ")
-				.append("asyncResolverRefreshIntervalMs=").append(asyncResolverRefreshIntervalMs).append(", ")
-				.append("asyncResolverWarmUpTimeoutMs=").append(asyncResolverWarmUpTimeoutMs).append(", ")
-				.append("asyncExecutorThreadPoolSize=").append(asyncExecutorThreadPoolSize).append(", ")
-				.append("readClusterVip='").append(readClusterVip).append("', ").append("writeClusterVip='")
-				.append(writeClusterVip).append("', ").append("bootstrapResolverForQuery=")
-				.append(bootstrapResolverForQuery).append(", ").append("bootstrapResolverStrategy='")
-				.append(bootstrapResolverStrategy).append("', ").append("applicationsResolverUseIp=")
-				.append(applicationsResolverUseIp).append(", ").append("}").toString();
+			.append(sessionedClientReconnectIntervalSeconds)
+			.append(", ")
+			.append("retryableClientQuarantineRefreshPercentage=")
+			.append(retryableClientQuarantineRefreshPercentage)
+			.append(", ")
+			.append("bootstrapResolverRefreshIntervalSeconds=")
+			.append(bootstrapResolverRefreshIntervalSeconds)
+			.append(", ")
+			.append("applicationsResolverDataStalenessThresholdSeconds=")
+			.append(applicationsResolverDataStalenessThresholdSeconds)
+			.append(", ")
+			.append("asyncResolverRefreshIntervalMs=")
+			.append(asyncResolverRefreshIntervalMs)
+			.append(", ")
+			.append("asyncResolverWarmUpTimeoutMs=")
+			.append(asyncResolverWarmUpTimeoutMs)
+			.append(", ")
+			.append("asyncExecutorThreadPoolSize=")
+			.append(asyncExecutorThreadPoolSize)
+			.append(", ")
+			.append("readClusterVip='")
+			.append(readClusterVip)
+			.append("', ")
+			.append("writeClusterVip='")
+			.append(writeClusterVip)
+			.append("', ")
+			.append("bootstrapResolverForQuery=")
+			.append(bootstrapResolverForQuery)
+			.append(", ")
+			.append("bootstrapResolverStrategy='")
+			.append(bootstrapResolverStrategy)
+			.append("', ")
+			.append("applicationsResolverUseIp=")
+			.append(applicationsResolverUseIp)
+			.append(", ")
+			.append("}")
+			.toString();
 	}
 
 }

spring-cloud-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/EurekaClientAutoConfiguration.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2022 the original author or authors.
+ * Copyright 2013-present 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.
@@ -103,6 +103,7 @@ import static org.springframework.cloud.commons.util.IdUtils.getDefaultInstanceI
  * @author Daniel Lavoie
  * @author Olga Maciaszek-Sharma
  * @author Tim Ysewyn
+ * @author Robert Bleyl
  */
 @Configuration(proxyBeanMethods = false)
 @EnableConfigurationProperties
@@ -224,8 +225,8 @@ public class EurekaClientAutoConfiguration {
 	}
 
 	@Bean
-	public EurekaServiceRegistry eurekaServiceRegistry() {
-		return new EurekaServiceRegistry();
+	public EurekaServiceRegistry eurekaServiceRegistry(EurekaInstanceConfigBean eurekaInstanceConfigBean) {
+		return new EurekaServiceRegistry(eurekaInstanceConfigBean);
 	}
 
 	// @Bean
@@ -257,7 +258,7 @@ public class EurekaClientAutoConfiguration {
 		@Autowired
 		private ApplicationContext context;
 
-		@Autowired
+		@Autowired(required = false)
 		private AbstractDiscoveryClientOptionalArgs<?> optionalArgs;
 
 		@Bean(destroyMethod = "shutdown")
@@ -280,8 +281,11 @@ public class EurekaClientAutoConfiguration {
 		public EurekaRegistration eurekaRegistration(EurekaClient eurekaClient,
 				CloudEurekaInstanceConfig instanceConfig, ApplicationInfoManager applicationInfoManager,
 				@Autowired(required = false) ObjectProvider<HealthCheckHandler> healthCheckHandler) {
-			return EurekaRegistration.builder(instanceConfig).with(applicationInfoManager).with(eurekaClient)
-					.with(healthCheckHandler).build();
+			return EurekaRegistration.builder(instanceConfig)
+				.with(applicationInfoManager)
+				.with(eurekaClient)
+				.with(healthCheckHandler)
+				.build();
 		}
 
 	}
@@ -293,7 +297,7 @@ public class EurekaClientAutoConfiguration {
 		@Autowired
 		private ApplicationContext context;
 
-		@Autowired
+		@Autowired(required = false)
 		private AbstractDiscoveryClientOptionalArgs<?> optionalArgs;
 
 		@Bean(destroyMethod = "shutdown")
@@ -307,7 +311,7 @@ public class EurekaClientAutoConfiguration {
 			// problem
 			// when shutdown is called on the CloudEurekaClient where the
 			// ApplicationInfoManager bean is
-			// requested but wont be allowed because we are shutting down. To avoid this
+			// requested but won't be allowed because we are shutting down. To avoid this
 			// we use the
 			// object directly.
 			ApplicationInfoManager appManager;
@@ -339,8 +343,11 @@ public class EurekaClientAutoConfiguration {
 		public EurekaRegistration eurekaRegistration(EurekaClient eurekaClient,
 				CloudEurekaInstanceConfig instanceConfig, ApplicationInfoManager applicationInfoManager,
 				@Autowired(required = false) ObjectProvider<HealthCheckHandler> healthCheckHandler) {
-			return EurekaRegistration.builder(instanceConfig).with(applicationInfoManager).with(eurekaClient)
-					.with(healthCheckHandler).build();
+			return EurekaRegistration.builder(instanceConfig)
+				.with(applicationInfoManager)
+				.with(eurekaClient)
+				.with(healthCheckHandler)
+				.build();
 		}
 
 	}
@@ -410,75 +417,30 @@ class EurekaClientHints implements RuntimeHintsRegistrar {
 		if (!ClassUtils.isPresent("com.netflix.discovery.DiscoveryClient", classLoader)) {
 			return;
 		}
-		hints.reflection().registerType(TypeReference.of(DiscoveryClient.class),
-				hint -> hint.withMembers(MemberCategory.DECLARED_FIELDS, MemberCategory.INTROSPECT_DECLARED_METHODS))
-				.registerType(TypeReference.of(EurekaEndpoint.class),
-						hint -> hint.withMembers(MemberCategory.INVOKE_DECLARED_METHODS))
-				.registerType(TypeReference.of(DefaultEndpoint.class),
-						hint -> hint.withMembers(MemberCategory.DECLARED_FIELDS, MemberCategory.INVOKE_DECLARED_METHODS,
-								MemberCategory.INVOKE_DECLARED_CONSTRUCTORS))
-				.registerType(TypeReference.of(EurekaHttpClientDecorator.class),
-						hint -> hint.withMembers(MemberCategory.DECLARED_FIELDS,
-								MemberCategory.INTROSPECT_DECLARED_METHODS))
-				.registerType(TypeReference.of(EurekaHttpResponse.class),
-						hint -> hint.withMembers(MemberCategory.DECLARED_FIELDS, MemberCategory.INVOKE_DECLARED_METHODS,
-								MemberCategory.INVOKE_DECLARED_CONSTRUCTORS))
-				.registerType(TypeReference.of(EurekaHttpClientDecorator.RequestExecutor.class),
-						hint -> hint.withMembers(MemberCategory.INVOKE_DECLARED_METHODS))
-				.registerType(TypeReference.of(ApplicationInfoManager.class),
-						hint -> hint.withMembers(MemberCategory.INTROSPECT_DECLARED_METHODS))
-				.registerType(TypeReference.of(InstanceInfo.class),
-						hint -> hint.withMembers(MemberCategory.INVOKE_DECLARED_METHODS, MemberCategory.DECLARED_FIELDS,
-								MemberCategory.INVOKE_DECLARED_CONSTRUCTORS))
-				.registerType(TypeReference.of(InstanceInfo.ActionType.class),
-						hint -> hint.withMembers(MemberCategory.INTROSPECT_DECLARED_METHODS,
-								MemberCategory.DECLARED_FIELDS))
-				.registerType(TypeReference.of(InstanceInfo.PortWrapper.class),
-						hint -> hint.withMembers(MemberCategory.INVOKE_DECLARED_METHODS,
-								MemberCategory.INVOKE_DECLARED_CONSTRUCTORS, MemberCategory.DECLARED_FIELDS))
-				.registerType(TypeReference.of(LeaseInfo.class),
-						hint -> hint.withMembers(MemberCategory.INVOKE_DECLARED_METHODS,
-								MemberCategory.INVOKE_DECLARED_CONSTRUCTORS, MemberCategory.DECLARED_FIELDS))
-				.registerType(TypeReference.of(MyDataCenterInfo.class),
-						hint -> hint.withMembers(MemberCategory.INVOKE_DECLARED_METHODS,
-								MemberCategory.INVOKE_DECLARED_CONSTRUCTORS, MemberCategory.DECLARED_FIELDS))
-				.registerType(TypeReference.of(DataCenterInfo.class),
-						hint -> hint.withMembers(MemberCategory.INVOKE_DECLARED_METHODS,
-								MemberCategory.INVOKE_DECLARED_CONSTRUCTORS, MemberCategory.DECLARED_FIELDS))
-				.registerType(TypeReference.of(DataCenterInfo.Name.class),
-						hint -> hint.withMembers(MemberCategory.INVOKE_DECLARED_METHODS,
-								MemberCategory.INVOKE_DECLARED_CONSTRUCTORS, MemberCategory.DECLARED_FIELDS))
-				.registerType(TypeReference.of(EurekaClient.class),
-						hint -> hint.withMembers(MemberCategory.INVOKE_PUBLIC_METHODS))
-				.registerType(TypeReference.of(TimedSupervisorTask.class),
-						hint -> hint.withMembers(MemberCategory.INTROSPECT_DECLARED_METHODS,
-								MemberCategory.DECLARED_FIELDS))
-				.registerType(TypeReference.of(DataCenterTypeInfoResolver.class),
-						hint -> hint.withMembers(MemberCategory.INVOKE_PUBLIC_CONSTRUCTORS))
-				.registerType(TypeReference.of(ApplicationsJacksonBuilder.class),
-						hint -> hint.withMembers(MemberCategory.INVOKE_DECLARED_METHODS,
-								MemberCategory.INVOKE_DECLARED_CONSTRUCTORS, MemberCategory.DECLARED_FIELDS))
-				.registerType(TypeReference.of(InstanceInfoJsonMixIn.class),
-						hint -> hint.withMembers(MemberCategory.INTROSPECT_DECLARED_METHODS,
-								MemberCategory.DECLARED_FIELDS))
-				.registerType(TypeReference.of(Application.class),
-						hint -> hint.withMembers(MemberCategory.INTROSPECT_DECLARED_METHODS,
-								MemberCategory.INVOKE_PUBLIC_CONSTRUCTORS, MemberCategory.DECLARED_FIELDS))
-				.registerType(TypeReference.of(Applications.class),
-						hint -> hint.withMembers(MemberCategory.INTROSPECT_DECLARED_METHODS,
-								MemberCategory.DECLARED_FIELDS))
-				.registerType(TypeReference.of(AsyncResolver.class),
-						hint -> hint.withMembers(MemberCategory.INTROSPECT_DECLARED_METHODS,
-								MemberCategory.DECLARED_FIELDS))
-				.registerType(TypeReference.of(RetryableEurekaHttpClient.class),
-						hint -> hint.withMembers(MemberCategory.INTROSPECT_DECLARED_METHODS,
-								MemberCategory.DECLARED_FIELDS))
-				.registerType(TypeReference.of(SessionedEurekaHttpClient.class),
-						hint -> hint.withMembers(MemberCategory.INTROSPECT_DECLARED_METHODS,
-								MemberCategory.DECLARED_FIELDS))
-				.registerType(TypeReference.of(EurekaServiceInstance.class),
-						hint -> hint.withMembers(MemberCategory.INVOKE_DECLARED_METHODS,
-								MemberCategory.INVOKE_DECLARED_CONSTRUCTORS, MemberCategory.DECLARED_FIELDS));
+		hints.reflection()
+			.registerTypes(TypeReference.listOf(ApplicationInfoManager.class),
+					hint -> hint.withMembers(MemberCategory.INTROSPECT_DECLARED_METHODS))
+			.registerTypes(
+					TypeReference.listOf(DiscoveryClient.class, EurekaHttpClientDecorator.class,
+							InstanceInfo.ActionType.class, InstanceInfoJsonMixIn.class, SessionedEurekaHttpClient.class,
+							RetryableEurekaHttpClient.class, AsyncResolver.class, Applications.class,
+							TimedSupervisorTask.class),
+					hint -> hint.withMembers(MemberCategory.DECLARED_FIELDS,
+							MemberCategory.INTROSPECT_DECLARED_METHODS))
+			.registerTypes(
+					TypeReference.listOf(EurekaEndpoint.class, EurekaHttpClientDecorator.RequestExecutor.class,
+							EurekaClient.class, DiscoveryClient.class),
+					hint -> hint.withMembers(MemberCategory.INVOKE_DECLARED_METHODS))
+			.registerTypes(TypeReference.listOf(DataCenterTypeInfoResolver.class),
+					hint -> hint.withMembers(MemberCategory.INVOKE_PUBLIC_CONSTRUCTORS))
+			.registerTypes(TypeReference.listOf(Application.class),
+					hint -> hint.withMembers(MemberCategory.DECLARED_FIELDS, MemberCategory.INTROSPECT_DECLARED_METHODS,
+							MemberCategory.INVOKE_PUBLIC_CONSTRUCTORS))
+			.registerTypes(TypeReference.listOf(DefaultEndpoint.class, EurekaHttpResponse.class, InstanceInfo.class,
+					InstanceInfo.PortWrapper.class, LeaseInfo.class, MyDataCenterInfo.class, DataCenterInfo.class,
+					DataCenterInfo.Name.class, ApplicationsJacksonBuilder.class, EurekaServiceInstance.class),
+					hint -> hint.withMembers(MemberCategory.DECLARED_FIELDS, MemberCategory.INVOKE_DECLARED_METHODS,
+							MemberCategory.INVOKE_DECLARED_CONSTRUCTORS));
 	}
 
 }

spring-cloud-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/EurekaClientConfigBean.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2022 the original author or authors.
+ * Copyright 2013-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -41,6 +41,7 @@ import static org.springframework.cloud.netflix.eureka.EurekaConstants.DEFAULT_P
  *
  * @author Dave Syer
  * @author Gregor Zurowski
+ * @author Mooyong Lee
  */
 @ConfigurationProperties(EurekaClientConfigBean.PREFIX)
 public class EurekaClientConfigBean implements EurekaClientConfig, Ordered {
@@ -60,8 +61,6 @@ public class EurekaClientConfigBean implements EurekaClientConfig, Ordered {
 	 */
 	public static final String DEFAULT_ZONE = "defaultZone";
 
-	private static final int MINUTES = 60;
-
 	@Autowired(required = false)
 	PropertyResolver propertyResolver;
 
@@ -96,7 +95,7 @@ public class EurekaClientConfigBean implements EurekaClientConfig, Ordered {
 	 * Eureka servers could be added or removed and this setting controls how soon the
 	 * eureka clients should know about it.
 	 */
-	private int eurekaServiceUrlPollIntervalSeconds = 5 * MINUTES;
+	private int eurekaServiceUrlPollIntervalSeconds = 300; // 5 * MINUTES
 
 	/**
 	 * Gets the proxy port to eureka server if any.
@@ -998,47 +997,147 @@ public class EurekaClientConfigBean implements EurekaClientConfig, Ordered {
 
 	@Override
 	public String toString() {
-		return new StringBuilder("EurekaClientConfigBean{").append("propertyResolver=").append(propertyResolver)
-				.append(", ").append("enabled=").append(enabled).append(", ").append("transport=").append(transport)
-				.append(", ").append("registryFetchIntervalSeconds=").append(registryFetchIntervalSeconds).append(", ")
-				.append("instanceInfoReplicationIntervalSeconds=").append(instanceInfoReplicationIntervalSeconds)
-				.append(", ").append("initialInstanceInfoReplicationIntervalSeconds=")
-				.append(initialInstanceInfoReplicationIntervalSeconds).append(", ")
-				.append("eurekaServiceUrlPollIntervalSeconds=").append(eurekaServiceUrlPollIntervalSeconds).append(", ")
-				.append("proxyPort='").append(proxyPort).append("', ").append("proxyHost='").append(proxyHost)
-				.append("', ").append("proxyUserName='").append(proxyUserName).append("', ").append("proxyPassword='")
-				.append(proxyPassword).append("', ").append("eurekaServerReadTimeoutSeconds=")
-				.append(eurekaServerReadTimeoutSeconds).append(", ").append("eurekaServerConnectTimeoutSeconds=")
-				.append(eurekaServerConnectTimeoutSeconds).append(", ").append("backupRegistryImpl='")
-				.append(backupRegistryImpl).append("', ").append("eurekaServerTotalConnections=")
-				.append(eurekaServerTotalConnections).append(", ").append("eurekaServerTotalConnectionsPerHost=")
-				.append(eurekaServerTotalConnectionsPerHost).append(", ").append("eurekaServerURLContext='")
-				.append(eurekaServerURLContext).append("', ").append("eurekaServerPort='").append(eurekaServerPort)
-				.append("', ").append("eurekaServerDNSName='").append(eurekaServerDNSName).append("', ")
-				.append("region='").append(region).append("', ").append("eurekaConnectionIdleTimeoutSeconds=")
-				.append(eurekaConnectionIdleTimeoutSeconds).append(", ").append("registryRefreshSingleVipAddress='")
-				.append(registryRefreshSingleVipAddress).append("', ").append("heartbeatExecutorThreadPoolSize=")
-				.append(heartbeatExecutorThreadPoolSize).append(", ")
-				.append("heartbeatExecutorExponentialBackOffBound=").append(heartbeatExecutorExponentialBackOffBound)
-				.append(", ").append("cacheRefreshExecutorThreadPoolSize=").append(cacheRefreshExecutorThreadPoolSize)
-				.append(", ").append("cacheRefreshExecutorExponentialBackOffBound=")
-				.append(cacheRefreshExecutorExponentialBackOffBound).append(", ").append("serviceUrl=")
-				.append(serviceUrl).append(", ").append("gZipContent=").append(gZipContent).append(", ")
-				.append("useDnsForFetchingServiceUrls=").append(useDnsForFetchingServiceUrls).append(", ")
-				.append("registerWithEureka=").append(registerWithEureka).append(", ").append("preferSameZoneEureka=")
-				.append(preferSameZoneEureka).append(", ").append("logDeltaDiff=").append(logDeltaDiff).append(", ")
-				.append("disableDelta=").append(disableDelta).append(", ").append("fetchRemoteRegionsRegistry='")
-				.append(fetchRemoteRegionsRegistry).append("', ").append("availabilityZones=").append(availabilityZones)
-				.append(", ").append("filterOnlyUpInstances=").append(filterOnlyUpInstances).append(", ")
-				.append("fetchRegistry=").append(fetchRegistry).append(", ").append("dollarReplacement='")
-				.append(dollarReplacement).append("', ").append("escapeCharReplacement='").append(escapeCharReplacement)
-				.append("', ").append("allowRedirects=").append(allowRedirects).append(", ")
-				.append("onDemandUpdateStatusChange=").append(onDemandUpdateStatusChange).append(", ")
-				.append("encoderName='").append(encoderName).append("', ").append("decoderName='").append(decoderName)
-				.append("', ").append("clientDataAccept='").append(clientDataAccept).append("', ")
-				.append("shouldUnregisterOnShutdown='").append(shouldUnregisterOnShutdown)
-				.append("shouldEnforceRegistrationAtInit='").append(shouldEnforceRegistrationAtInit).append("', ")
-				.append("order='").append(order).append("'}").toString();
+		return new StringBuilder("EurekaClientConfigBean{").append("propertyResolver=")
+			.append(propertyResolver)
+			.append(", ")
+			.append("enabled=")
+			.append(enabled)
+			.append(", ")
+			.append("transport=")
+			.append(transport)
+			.append(", ")
+			.append("registryFetchIntervalSeconds=")
+			.append(registryFetchIntervalSeconds)
+			.append(", ")
+			.append("instanceInfoReplicationIntervalSeconds=")
+			.append(instanceInfoReplicationIntervalSeconds)
+			.append(", ")
+			.append("initialInstanceInfoReplicationIntervalSeconds=")
+			.append(initialInstanceInfoReplicationIntervalSeconds)
+			.append(", ")
+			.append("eurekaServiceUrlPollIntervalSeconds=")
+			.append(eurekaServiceUrlPollIntervalSeconds)
+			.append(", ")
+			.append("proxyPort='")
+			.append(proxyPort)
+			.append("', ")
+			.append("proxyHost='")
+			.append(proxyHost)
+			.append("', ")
+			.append("proxyUserName='")
+			.append(proxyUserName)
+			.append("', ")
+			.append("proxyPassword='")
+			.append(proxyPassword)
+			.append("', ")
+			.append("eurekaServerReadTimeoutSeconds=")
+			.append(eurekaServerReadTimeoutSeconds)
+			.append(", ")
+			.append("eurekaServerConnectTimeoutSeconds=")
+			.append(eurekaServerConnectTimeoutSeconds)
+			.append(", ")
+			.append("backupRegistryImpl='")
+			.append(backupRegistryImpl)
+			.append("', ")
+			.append("eurekaServerTotalConnections=")
+			.append(eurekaServerTotalConnections)
+			.append(", ")
+			.append("eurekaServerTotalConnectionsPerHost=")
+			.append(eurekaServerTotalConnectionsPerHost)
+			.append(", ")
+			.append("eurekaServerURLContext='")
+			.append(eurekaServerURLContext)
+			.append("', ")
+			.append("eurekaServerPort='")
+			.append(eurekaServerPort)
+			.append("', ")
+			.append("eurekaServerDNSName='")
+			.append(eurekaServerDNSName)
+			.append("', ")
+			.append("region='")
+			.append(region)
+			.append("', ")
+			.append("eurekaConnectionIdleTimeoutSeconds=")
+			.append(eurekaConnectionIdleTimeoutSeconds)
+			.append(", ")
+			.append("registryRefreshSingleVipAddress='")
+			.append(registryRefreshSingleVipAddress)
+			.append("', ")
+			.append("heartbeatExecutorThreadPoolSize=")
+			.append(heartbeatExecutorThreadPoolSize)
+			.append(", ")
+			.append("heartbeatExecutorExponentialBackOffBound=")
+			.append(heartbeatExecutorExponentialBackOffBound)
+			.append(", ")
+			.append("cacheRefreshExecutorThreadPoolSize=")
+			.append(cacheRefreshExecutorThreadPoolSize)
+			.append(", ")
+			.append("cacheRefreshExecutorExponentialBackOffBound=")
+			.append(cacheRefreshExecutorExponentialBackOffBound)
+			.append(", ")
+			.append("serviceUrl=")
+			.append(serviceUrl)
+			.append(", ")
+			.append("gZipContent=")
+			.append(gZipContent)
+			.append(", ")
+			.append("useDnsForFetchingServiceUrls=")
+			.append(useDnsForFetchingServiceUrls)
+			.append(", ")
+			.append("registerWithEureka=")
+			.append(registerWithEureka)
+			.append(", ")
+			.append("preferSameZoneEureka=")
+			.append(preferSameZoneEureka)
+			.append(", ")
+			.append("logDeltaDiff=")
+			.append(logDeltaDiff)
+			.append(", ")
+			.append("disableDelta=")
+			.append(disableDelta)
+			.append(", ")
+			.append("fetchRemoteRegionsRegistry='")
+			.append(fetchRemoteRegionsRegistry)
+			.append("', ")
+			.append("availabilityZones=")
+			.append(availabilityZones)
+			.append(", ")
+			.append("filterOnlyUpInstances=")
+			.append(filterOnlyUpInstances)
+			.append(", ")
+			.append("fetchRegistry=")
+			.append(fetchRegistry)
+			.append(", ")
+			.append("dollarReplacement='")
+			.append(dollarReplacement)
+			.append("', ")
+			.append("escapeCharReplacement='")
+			.append(escapeCharReplacement)
+			.append("', ")
+			.append("allowRedirects=")
+			.append(allowRedirects)
+			.append(", ")
+			.append("onDemandUpdateStatusChange=")
+			.append(onDemandUpdateStatusChange)
+			.append(", ")
+			.append("encoderName='")
+			.append(encoderName)
+			.append("', ")
+			.append("decoderName='")
+			.append(decoderName)
+			.append("', ")
+			.append("clientDataAccept='")
+			.append(clientDataAccept)
+			.append("', ")
+			.append("shouldUnregisterOnShutdown='")
+			.append(shouldUnregisterOnShutdown)
+			.append("shouldEnforceRegistrationAtInit='")
+			.append(shouldEnforceRegistrationAtInit)
+			.append("', ")
+			.append("order='")
+			.append(order)
+			.append("'}")
+			.toString();
 	}
 
 }

spring-cloud-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/EurekaConstants.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2022 the original author or authors.
+ * Copyright 2013-present 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-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/EurekaDiscoveryClient.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2022 the original author or authors.
+ * Copyright 2013-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -19,6 +19,7 @@ package org.springframework.cloud.netflix.eureka;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
+import java.util.Locale;
 
 import com.netflix.appinfo.InstanceInfo;
 import com.netflix.discovery.EurekaClient;
@@ -35,6 +36,7 @@ import org.springframework.core.Ordered;
  *
  * @author Spencer Gibb
  * @author Tim Ysewyn
+ * @author Olga Maciaszek-Sharma
  */
 public class EurekaDiscoveryClient implements DiscoveryClient {
 
@@ -79,7 +81,7 @@ public class EurekaDiscoveryClient implements DiscoveryClient {
 			if (app.getInstances().isEmpty()) {
 				continue;
 			}
-			names.add(app.getName().toLowerCase());
+			names.add(app.getName().toLowerCase(Locale.ROOT));
 
 		}
 		return names;

spring-cloud-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/EurekaDiscoveryClientConfiguration.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2022 the original author or authors.
+ * Copyright 2013-present 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.
@@ -84,8 +84,9 @@ public class EurekaDiscoveryClientConfiguration {
 		private EurekaAutoServiceRegistration autoRegistration;
 
 		public void onApplicationEvent(RefreshScopeRefreshedEvent event) {
-			// This will force the creation of the EurkaClient bean if not already created
-			// to make sure the client will be reregistered after a refresh event
+			// This will force the creation of the EurekaClient bean if not already
+			// created
+			// to make sure the client will be re-registered after a refresh event
 			if (eurekaClient != null) {
 				eurekaClient.getApplications();
 			}

spring-cloud-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/EurekaHealthCheckHandler.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2022 the original author or authors.
+ * Copyright 2013-present 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-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/EurekaHealthIndicator.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2022 the original author or authors.
+ * Copyright 2013-present 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-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/EurekaInstanceConfigBean.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2022 the original author or authors.
+ * Copyright 2013-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -38,6 +38,7 @@ import org.springframework.util.StringUtils;
  * @author Spencer Gibb
  * @author Ryan Baxter
  * @author Gregor Zurowski
+ * @author Robert Bleyl
  */
 @ConfigurationProperties("eureka.instance")
 public class EurekaInstanceConfigBean implements CloudEurekaInstanceConfig, EnvironmentAware {
@@ -269,6 +270,12 @@ public class EurekaInstanceConfigBean implements CloudEurekaInstanceConfig, Envi
 	 */
 	private boolean preferIpAddress = false;
 
+	/**
+	 * If true the EurekaClient will be initialized asynchronously when the
+	 * InstanceRegistry bean is created.
+	 */
+	private boolean asyncClientInitialization;
+
 	/**
 	 * Initial status to register with remote Eureka server.
 	 */
@@ -547,6 +554,14 @@ public class EurekaInstanceConfigBean implements CloudEurekaInstanceConfig, Envi
 		this.preferIpAddress = preferIpAddress;
 	}
 
+	public boolean isAsyncClientInitialization() {
+		return asyncClientInitialization;
+	}
+
+	public void setAsyncClientInitialization(boolean asyncClientInitialization) {
+		this.asyncClientInitialization = asyncClientInitialization;
+	}
+
 	public InstanceStatus getInitialStatus() {
 		return initialStatus;
 	}
@@ -597,6 +612,7 @@ public class EurekaInstanceConfigBean implements CloudEurekaInstanceConfig, Envi
 				&& Objects.equals(namespace, that.namespace) && Objects.equals(hostname, that.hostname)
 				&& preferIpAddress == that.preferIpAddress && Objects.equals(initialStatus, that.initialStatus)
 				&& Arrays.equals(defaultAddressResolutionOrder, that.defaultAddressResolutionOrder)
+				&& asyncClientInitialization == that.asyncClientInitialization
 				&& Objects.equals(environment, that.environment);
 	}
 
@@ -607,34 +623,109 @@ public class EurekaInstanceConfigBean implements CloudEurekaInstanceConfig, Envi
 				leaseExpirationDurationInSeconds, virtualHostName, instanceId, secureVirtualHostName, aSGName,
 				metadataMap, dataCenterInfo, ipAddress, statusPageUrlPath, statusPageUrl, homePageUrlPath, homePageUrl,
 				healthCheckUrlPath, healthCheckUrl, secureHealthCheckUrl, namespace, hostname, preferIpAddress,
-				initialStatus, Arrays.hashCode(defaultAddressResolutionOrder), environment);
+				asyncClientInitialization, initialStatus, Arrays.hashCode(defaultAddressResolutionOrder), environment);
 	}
 
 	@Override
 	public String toString() {
-		return new StringBuilder("EurekaInstanceConfigBean{").append("hostInfo=").append(hostInfo).append(", ")
-				.append("inetUtils=").append(inetUtils).append(", ").append("appname='").append(appname).append("', ")
-				.append("appGroupName='").append(appGroupName).append("', ").append("instanceEnabledOnit=")
-				.append(instanceEnabledOnit).append(", ").append("nonSecurePort=").append(nonSecurePort).append(", ")
-				.append("securePort=").append(securePort).append(", ").append("nonSecurePortEnabled=")
-				.append(nonSecurePortEnabled).append(", ").append("securePortEnabled=").append(securePortEnabled)
-				.append(", ").append("leaseRenewalIntervalInSeconds=").append(leaseRenewalIntervalInSeconds)
-				.append(", ").append("leaseExpirationDurationInSeconds=").append(leaseExpirationDurationInSeconds)
-				.append(", ").append("virtualHostName='").append(virtualHostName).append("', ").append("instanceId='")
-				.append(instanceId).append("', ").append("secureVirtualHostName='").append(secureVirtualHostName)
-				.append("', ").append("aSGName='").append(aSGName).append("', ").append("metadataMap=")
-				.append(metadataMap).append(", ").append("dataCenterInfo=").append(dataCenterInfo).append(", ")
-				.append("ipAddress='").append(ipAddress).append("', ").append("statusPageUrlPath='")
-				.append(statusPageUrlPath).append("', ").append("statusPageUrl='").append(statusPageUrl).append("', ")
-				.append("homePageUrlPath='").append(homePageUrlPath).append("', ").append("homePageUrl='")
-				.append(homePageUrl).append("', ").append("healthCheckUrlPath='").append(healthCheckUrlPath)
-				.append("', ").append("healthCheckUrl='").append(healthCheckUrl).append("', ")
-				.append("secureHealthCheckUrl='").append(secureHealthCheckUrl).append("', ").append("namespace='")
-				.append(namespace).append("', ").append("hostname='").append(hostname).append("', ")
-				.append("preferIpAddress=").append(preferIpAddress).append(", ").append("initialStatus=")
-				.append(initialStatus).append(", ").append("defaultAddressResolutionOrder=")
-				.append(Arrays.toString(defaultAddressResolutionOrder)).append(", ").append("environment=")
-				.append(environment).append(", ").append("}").toString();
+		return new StringBuilder("EurekaInstanceConfigBean{").append("hostInfo=")
+			.append(hostInfo)
+			.append(", ")
+			.append("inetUtils=")
+			.append(inetUtils)
+			.append(", ")
+			.append("appname='")
+			.append(appname)
+			.append("', ")
+			.append("appGroupName='")
+			.append(appGroupName)
+			.append("', ")
+			.append("instanceEnabledOnit=")
+			.append(instanceEnabledOnit)
+			.append(", ")
+			.append("nonSecurePort=")
+			.append(nonSecurePort)
+			.append(", ")
+			.append("securePort=")
+			.append(securePort)
+			.append(", ")
+			.append("nonSecurePortEnabled=")
+			.append(nonSecurePortEnabled)
+			.append(", ")
+			.append("securePortEnabled=")
+			.append(securePortEnabled)
+			.append(", ")
+			.append("leaseRenewalIntervalInSeconds=")
+			.append(leaseRenewalIntervalInSeconds)
+			.append(", ")
+			.append("leaseExpirationDurationInSeconds=")
+			.append(leaseExpirationDurationInSeconds)
+			.append(", ")
+			.append("virtualHostName='")
+			.append(virtualHostName)
+			.append("', ")
+			.append("instanceId='")
+			.append(instanceId)
+			.append("', ")
+			.append("secureVirtualHostName='")
+			.append(secureVirtualHostName)
+			.append("', ")
+			.append("aSGName='")
+			.append(aSGName)
+			.append("', ")
+			.append("metadataMap=")
+			.append(metadataMap)
+			.append(", ")
+			.append("dataCenterInfo=")
+			.append(dataCenterInfo)
+			.append(", ")
+			.append("ipAddress='")
+			.append(ipAddress)
+			.append("', ")
+			.append("statusPageUrlPath='")
+			.append(statusPageUrlPath)
+			.append("', ")
+			.append("statusPageUrl='")
+			.append(statusPageUrl)
+			.append("', ")
+			.append("homePageUrlPath='")
+			.append(homePageUrlPath)
+			.append("', ")
+			.append("homePageUrl='")
+			.append(homePageUrl)
+			.append("', ")
+			.append("healthCheckUrlPath='")
+			.append(healthCheckUrlPath)
+			.append("', ")
+			.append("healthCheckUrl='")
+			.append(healthCheckUrl)
+			.append("', ")
+			.append("secureHealthCheckUrl='")
+			.append(secureHealthCheckUrl)
+			.append("', ")
+			.append("namespace='")
+			.append(namespace)
+			.append("', ")
+			.append("hostname='")
+			.append(hostname)
+			.append("', ")
+			.append("asyncClientInitialization=")
+			.append(asyncClientInitialization)
+			.append(", ")
+			.append("preferIpAddress=")
+			.append(preferIpAddress)
+			.append(", ")
+			.append("initialStatus=")
+			.append(initialStatus)
+			.append(", ")
+			.append("defaultAddressResolutionOrder=")
+			.append(Arrays.toString(defaultAddressResolutionOrder))
+			.append(", ")
+			.append("environment=")
+			.append(environment)
+			.append(", ")
+			.append("}")
+			.toString();
 	}
 
 }

spring-cloud-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/EurekaServiceInstance.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2022 the original author or authors.
+ * Copyright 2013-present 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-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/InstanceInfoFactory.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2022 the original author or authors.
+ * Copyright 2013-present 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.
@@ -35,8 +35,8 @@ public class InstanceInfoFactory {
 
 	public InstanceInfo create(EurekaInstanceConfig config) {
 		LeaseInfo.Builder leaseInfoBuilder = LeaseInfo.Builder.newBuilder()
-				.setRenewalIntervalInSecs(config.getLeaseRenewalIntervalInSeconds())
-				.setDurationInSecs(config.getLeaseExpirationDurationInSeconds());
+			.setRenewalIntervalInSecs(config.getLeaseRenewalIntervalInSeconds())
+			.setDurationInSecs(config.getLeaseExpirationDurationInSeconds());
 
 		// Builder the instance information to be registered with eureka
 		// server
@@ -46,19 +46,24 @@ public class InstanceInfoFactory {
 		if (!namespace.endsWith(".")) {
 			namespace = namespace + ".";
 		}
-		builder.setNamespace(namespace).setAppName(config.getAppname()).setInstanceId(config.getInstanceId())
-				.setAppGroupName(config.getAppGroupName()).setDataCenterInfo(config.getDataCenterInfo())
-				.setIPAddr(config.getIpAddress()).setHostName(config.getHostName(false))
-				.setPort(config.getNonSecurePort())
-				.enablePort(InstanceInfo.PortType.UNSECURE, config.isNonSecurePortEnabled())
-				.setSecurePort(config.getSecurePort())
-				.enablePort(InstanceInfo.PortType.SECURE, config.getSecurePortEnabled())
-				.setVIPAddress(config.getVirtualHostName()).setSecureVIPAddress(config.getSecureVirtualHostName())
-				.setHomePageUrl(config.getHomePageUrlPath(), config.getHomePageUrl())
-				.setStatusPageUrl(config.getStatusPageUrlPath(), config.getStatusPageUrl())
-				.setHealthCheckUrls(config.getHealthCheckUrlPath(), config.getHealthCheckUrl(),
-						config.getSecureHealthCheckUrl())
-				.setASGName(config.getASGName());
+		builder.setNamespace(namespace)
+			.setAppName(config.getAppname())
+			.setInstanceId(config.getInstanceId())
+			.setAppGroupName(config.getAppGroupName())
+			.setDataCenterInfo(config.getDataCenterInfo())
+			.setIPAddr(config.getIpAddress())
+			.setHostName(config.getHostName(false))
+			.setPort(config.getNonSecurePort())
+			.enablePort(InstanceInfo.PortType.UNSECURE, config.isNonSecurePortEnabled())
+			.setSecurePort(config.getSecurePort())
+			.enablePort(InstanceInfo.PortType.SECURE, config.getSecurePortEnabled())
+			.setVIPAddress(config.getVirtualHostName())
+			.setSecureVIPAddress(config.getSecureVirtualHostName())
+			.setHomePageUrl(config.getHomePageUrlPath(), config.getHomePageUrl())
+			.setStatusPageUrl(config.getStatusPageUrlPath(), config.getStatusPageUrl())
+			.setHealthCheckUrls(config.getHealthCheckUrlPath(), config.getHealthCheckUrl(),
+					config.getSecureHealthCheckUrl())
+			.setASGName(config.getASGName());
 
 		// Start off with the STARTING state to avoid traffic
 		if (!config.isInstanceEnabledOnit()) {

spring-cloud-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/RestClientTimeoutProperties.java

@@ -0,0 +1,37 @@
+/*
+ * Copyright 2013-present 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.netflix.eureka;
+
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.web.client.RestClient;
+
+/**
+ * A {@link RestClient}-specific {@link TimeoutProperties} implementation.
+ *
+ * @author Olga Maciaszek-Sharma
+ * @since 4.2.0
+ */
+@ConfigurationProperties("eureka.client.restclient.timeout")
+public class RestClientTimeoutProperties extends TimeoutProperties {
+
+	@Override
+	public String toString() {
+		return "RestClientTimeoutProperties{" + ", connectTimeout=" + connectTimeout + ", connectRequestTimeout="
+				+ connectRequestTimeout + ", socketTimeout=" + socketTimeout + '}';
+	}
+
+}

spring-cloud-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/RestTemplateTimeoutProperties.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2022 the original author or authors.
+ * Copyright 2013-present 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.
@@ -16,78 +16,23 @@
 
 package org.springframework.cloud.netflix.eureka;
 
-import java.util.Objects;
-
-import org.apache.hc.client5.http.config.RequestConfig;
-import org.apache.hc.core5.http.io.SocketConfig;
-
 import org.springframework.boot.context.properties.ConfigurationProperties;
-import org.springframework.cloud.netflix.eureka.http.RestTemplateEurekaHttpClient;
+import org.springframework.web.client.RestClient;
 import org.springframework.web.client.RestTemplate;
 
 /**
- * Properties for configuring timeouts used in {@link RestTemplate} required by
- * {@link RestTemplateEurekaHttpClient}.
+ * A {@link RestTemplate}-specific {@link TimeoutProperties} implementation.
  *
  * @author Jiwon Jeon
+ * @author Mooyong Lee
+ * @author Olga Maciaszek-Sharma
  * @since 3.1.6
+ * @deprecated {@link RestTemplate}-based implementation to be removed in favour of
+ * {@link RestClient}-based implementation.
  */
+@Deprecated(forRemoval = true)
 @ConfigurationProperties("eureka.client.rest-template-timeout")
-public class RestTemplateTimeoutProperties {
-
-	/**
-	 * Default values are set to 180000, in keeping with {@link RequestConfig} and
-	 * {@link SocketConfig} defaults.
-	 */
-	private int connectTimeout = 3 * 60 * 1000;
-
-	private int connectRequestTimeout = 3 * 60 * 1000;
-
-	private int socketTimeout = 3 * 60 * 1000;
-
-	public int getConnectTimeout() {
-		return connectTimeout;
-	}
-
-	public int getConnectRequestTimeout() {
-		return connectRequestTimeout;
-	}
-
-	public int getSocketTimeout() {
-		return socketTimeout;
-	}
-
-	public void setConnectTimeout(int connectTimeout) {
-		this.connectTimeout = connectTimeout;
-	}
-
-	public void setConnectRequestTimeout(int connectRequestTimeout) {
-		this.connectRequestTimeout = connectRequestTimeout;
-	}
-
-	public void setSocketTimeout(int socketTimeout) {
-		this.socketTimeout = socketTimeout;
-	}
-
-	@Override
-	public boolean equals(Object o) {
-		if (this == o) {
-			return true;
-		}
-		if (o == null || getClass() != o.getClass()) {
-			return false;
-		}
-
-		RestTemplateTimeoutProperties that = (RestTemplateTimeoutProperties) o;
-
-		return connectTimeout == that.connectTimeout && connectRequestTimeout == that.connectRequestTimeout
-				&& socketTimeout == that.socketTimeout;
-	}
-
-	@Override
-	public int hashCode() {
-		return Objects.hash(connectTimeout, connectRequestTimeout, socketTimeout);
-	}
+public class RestTemplateTimeoutProperties extends TimeoutProperties {
 
 	@Override
 	public String toString() {

spring-cloud-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/TimeoutProperties.java

@@ -0,0 +1,92 @@
+/*
+ * Copyright 2013-present 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.netflix.eureka;
+
+import java.util.Objects;
+
+import com.netflix.discovery.shared.transport.EurekaHttpClient;
+import org.apache.hc.client5.http.config.RequestConfig;
+import org.apache.hc.core5.http.io.SocketConfig;
+
+import org.springframework.web.client.RestTemplate;
+
+/**
+ * Properties for configuring timeouts used in {@link RestTemplate} required by
+ * {@link EurekaHttpClient}.
+ *
+ * @author Jiwon Jeon
+ * @author Mooyong Lee
+ * @author Olga Maciaszek-Sharma
+ * @since 4.2.0
+ */
+public abstract class TimeoutProperties {
+
+	/**
+	 * Default values are set to 180000, in keeping with {@link RequestConfig} and
+	 * {@link SocketConfig} defaults.
+	 */
+	protected int connectTimeout = 180000; // 3 * MINUTES
+
+	protected int connectRequestTimeout = 180000; // 3 * MINUTES
+
+	protected int socketTimeout = 180000; // 3 * MINUTES
+
+	public int getConnectTimeout() {
+		return connectTimeout;
+	}
+
+	public int getConnectRequestTimeout() {
+		return connectRequestTimeout;
+	}
+
+	public int getSocketTimeout() {
+		return socketTimeout;
+	}
+
+	public void setConnectTimeout(int connectTimeout) {
+		this.connectTimeout = connectTimeout;
+	}
+
+	public void setConnectRequestTimeout(int connectRequestTimeout) {
+		this.connectRequestTimeout = connectRequestTimeout;
+	}
+
+	public void setSocketTimeout(int socketTimeout) {
+		this.socketTimeout = socketTimeout;
+	}
+
+	@Override
+	public boolean equals(Object o) {
+		if (this == o) {
+			return true;
+		}
+		if (o == null || getClass() != o.getClass()) {
+			return false;
+		}
+
+		RestTemplateTimeoutProperties that = (RestTemplateTimeoutProperties) o;
+
+		return connectTimeout == that.connectTimeout && connectRequestTimeout == that.connectRequestTimeout
+				&& socketTimeout == that.socketTimeout;
+	}
+
+	@Override
+	public int hashCode() {
+		return Objects.hash(connectTimeout, connectRequestTimeout, socketTimeout);
+	}
+
+}

spring-cloud-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/config/DiscoveryClientOptionalArgsConfiguration.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2022 the original author or authors.
+ * Copyright 2017-present 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.
@@ -18,6 +18,7 @@ package org.springframework.cloud.netflix.eureka.config;
 
 import java.io.IOException;
 import java.security.GeneralSecurityException;
+import java.util.Set;
 
 import com.netflix.discovery.AbstractDiscoveryClientOptionalArgs;
 import com.netflix.discovery.shared.transport.jersey.TransportClientFactories;
@@ -25,7 +26,8 @@ import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 
 import org.springframework.beans.factory.ObjectProvider;
-import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.autoconfigure.condition.AllNestedConditions;
+import org.springframework.boot.autoconfigure.condition.AnyNestedCondition;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
@@ -34,24 +36,34 @@ import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.boot.autoconfigure.condition.SearchStrategy;
 import org.springframework.boot.context.properties.ConfigurationProperties;
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
+import org.springframework.boot.web.client.RestTemplateBuilder;
 import org.springframework.cloud.configuration.SSLContextFactory;
 import org.springframework.cloud.configuration.TlsProperties;
+import org.springframework.cloud.netflix.eureka.RestClientTimeoutProperties;
 import org.springframework.cloud.netflix.eureka.RestTemplateTimeoutProperties;
 import org.springframework.cloud.netflix.eureka.http.DefaultEurekaClientHttpRequestFactorySupplier;
 import org.springframework.cloud.netflix.eureka.http.EurekaClientHttpRequestFactorySupplier;
+import org.springframework.cloud.netflix.eureka.http.RestClientDiscoveryClientOptionalArgs;
+import org.springframework.cloud.netflix.eureka.http.RestClientTransportClientFactories;
 import org.springframework.cloud.netflix.eureka.http.RestTemplateDiscoveryClientOptionalArgs;
 import org.springframework.cloud.netflix.eureka.http.RestTemplateTransportClientFactories;
 import org.springframework.cloud.netflix.eureka.http.WebClientDiscoveryClientOptionalArgs;
 import org.springframework.cloud.netflix.eureka.http.WebClientTransportClientFactories;
 import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Conditional;
 import org.springframework.context.annotation.Configuration;
+import org.springframework.web.client.RestClient;
+import org.springframework.web.client.RestTemplate;
 import org.springframework.web.reactive.function.client.WebClient;
 
 /**
  * @author Daniel Lavoie
+ * @author Armin Krezovic
+ * @author Olga Maciaszek-Sharma
+ * @author Wonchul Heo
  */
 @Configuration(proxyBeanMethods = false)
-@EnableConfigurationProperties(RestTemplateTimeoutProperties.class)
+@EnableConfigurationProperties({ RestTemplateTimeoutProperties.class, RestClientTimeoutProperties.class })
 public class DiscoveryClientOptionalArgsConfiguration {
 
 	protected static final Log logger = LogFactory.getLog(DiscoveryClientOptionalArgsConfiguration.class);
@@ -62,42 +74,8 @@ public class DiscoveryClientOptionalArgsConfiguration {
 		return new TlsProperties();
 	}
 
-	@Bean
-	@ConditionalOnClass(name = "org.springframework.web.client.RestTemplate")
-	@ConditionalOnMissingClass("org.glassfish.jersey.client.JerseyClient")
-	@ConditionalOnMissingBean(value = { AbstractDiscoveryClientOptionalArgs.class }, search = SearchStrategy.CURRENT)
-	@ConditionalOnProperty(prefix = "eureka.client", name = "webclient.enabled", matchIfMissing = true,
-			havingValue = "false")
-	public RestTemplateDiscoveryClientOptionalArgs restTemplateDiscoveryClientOptionalArgs(TlsProperties tlsProperties,
-			EurekaClientHttpRequestFactorySupplier eurekaClientHttpRequestFactorySupplier)
-			throws GeneralSecurityException, IOException {
-		logger.info("Eureka HTTP Client uses RestTemplate.");
-		RestTemplateDiscoveryClientOptionalArgs result = new RestTemplateDiscoveryClientOptionalArgs(
-				eurekaClientHttpRequestFactorySupplier);
-		setupTLS(result, tlsProperties);
-		return result;
-	}
-
-	@Bean
-	@ConditionalOnClass(name = "org.springframework.web.client.RestTemplate")
-	@ConditionalOnMissingClass("org.glassfish.jersey.client.JerseyClient")
-	@ConditionalOnMissingBean(value = { TransportClientFactories.class }, search = SearchStrategy.CURRENT)
-	@ConditionalOnProperty(prefix = "eureka.client", name = "webclient.enabled", matchIfMissing = true,
-			havingValue = "false")
-	public RestTemplateTransportClientFactories restTemplateTransportClientFactories(
-			RestTemplateDiscoveryClientOptionalArgs optionalArgs) {
-		return new RestTemplateTransportClientFactories(optionalArgs);
-	}
-
-	@Bean
-	@ConditionalOnMissingBean
-	@ConditionalOnClass(name = "org.springframework.web.client.RestTemplate")
-	EurekaClientHttpRequestFactorySupplier defaultEurekaClientHttpRequestFactorySupplier(
-			RestTemplateTimeoutProperties restTemplateTimeoutProperties) {
-		return new DefaultEurekaClientHttpRequestFactorySupplier(restTemplateTimeoutProperties);
-	}
-
-	private static void setupTLS(AbstractDiscoveryClientOptionalArgs<?> args, TlsProperties properties)
+	// Visible for tests
+	public static void setupTLS(AbstractDiscoveryClientOptionalArgs<?> args, TlsProperties properties)
 			throws GeneralSecurityException, IOException {
 		if (properties.isEnabled()) {
 			SSLContextFactory factory = new SSLContextFactory(properties);
@@ -105,34 +83,79 @@ public class DiscoveryClientOptionalArgsConfiguration {
 		}
 	}
 
+	/**
+	 * @deprecated {@link RestTemplate}-based implementation to be removed in favour of
+	 * {@link RestClient}-based implementation.
+	 */
 	@Configuration(proxyBeanMethods = false)
-	@ConditionalOnClass(name = "org.glassfish.jersey.client.JerseyClient")
+	@Conditional(OnRestTemplatePresentAndEnabledCondition.class)
+	@Deprecated
+	static class RestTemplateConfiguration {
+
+		@Bean
+		@ConditionalOnMissingBean
+		EurekaClientHttpRequestFactorySupplier defaultEurekaClientHttpRequestFactorySupplier(
+				RestTemplateTimeoutProperties restTemplateTimeoutProperties,
+				Set<EurekaClientHttpRequestFactorySupplier.RequestConfigCustomizer> requestConfigCustomizers) {
+			return new DefaultEurekaClientHttpRequestFactorySupplier(restTemplateTimeoutProperties,
+					requestConfigCustomizers);
+		}
+
+		@Bean
+		@ConditionalOnMissingBean(value = { AbstractDiscoveryClientOptionalArgs.class },
+				search = SearchStrategy.CURRENT)
+		public RestTemplateDiscoveryClientOptionalArgs restTemplateDiscoveryClientOptionalArgs(
+				TlsProperties tlsProperties,
+				EurekaClientHttpRequestFactorySupplier eurekaClientHttpRequestFactorySupplier,
+				ObjectProvider<RestTemplateBuilder> restTemplateBuilders) throws GeneralSecurityException, IOException {
+			if (logger.isInfoEnabled()) {
+				logger.info("Eureka HTTP Client uses RestTemplate.");
+			}
+			RestTemplateDiscoveryClientOptionalArgs result = new RestTemplateDiscoveryClientOptionalArgs(
+					eurekaClientHttpRequestFactorySupplier, restTemplateBuilders::getIfAvailable);
+			setupTLS(result, tlsProperties);
+			return result;
+		}
+
+		@Bean
+		@ConditionalOnMissingBean(value = { TransportClientFactories.class }, search = SearchStrategy.CURRENT)
+		public RestTemplateTransportClientFactories restTemplateTransportClientFactories(
+				RestTemplateDiscoveryClientOptionalArgs optionalArgs) {
+			return new RestTemplateTransportClientFactories(optionalArgs);
+		}
+
+	}
+
+	@Configuration(proxyBeanMethods = false)
+	@Conditional(OnJerseyClientPresentAndEnabledCondition.class)
 	@ConditionalOnBean(value = AbstractDiscoveryClientOptionalArgs.class, search = SearchStrategy.CURRENT)
 	static class DiscoveryClientOptionalArgsTlsConfiguration {
 
 		DiscoveryClientOptionalArgsTlsConfiguration(TlsProperties tlsProperties,
 				AbstractDiscoveryClientOptionalArgs optionalArgs) throws GeneralSecurityException, IOException {
-			logger.info("Eureka HTTP Client uses Jersey");
+			if (logger.isInfoEnabled()) {
+				logger.info("Eureka HTTP Client uses Jersey");
+			}
 			setupTLS(optionalArgs, tlsProperties);
 		}
 
 	}
 
-	@ConditionalOnMissingClass("org.glassfish.jersey.client.JerseyClient")
+	@Configuration(proxyBeanMethods = false)
+	@Conditional(OnJerseyClientNotPresentOrNotEnabledCondition.class)
 	@ConditionalOnClass(name = "org.springframework.web.reactive.function.client.WebClient")
 	@ConditionalOnProperty(prefix = "eureka.client", name = "webclient.enabled", havingValue = "true")
 	protected static class WebClientConfiguration {
 
-		@Autowired
-		private TlsProperties tlsProperties;
-
 		@Bean
 		@ConditionalOnMissingBean(
 				value = { AbstractDiscoveryClientOptionalArgs.class, RestTemplateDiscoveryClientOptionalArgs.class },
 				search = SearchStrategy.CURRENT)
-		public WebClientDiscoveryClientOptionalArgs webClientDiscoveryClientOptionalArgs(
+		public WebClientDiscoveryClientOptionalArgs webClientDiscoveryClientOptionalArgs(TlsProperties tlsProperties,
 				ObjectProvider<WebClient.Builder> builder) throws GeneralSecurityException, IOException {
-			logger.info("Eureka HTTP Client uses WebClient.");
+			if (logger.isInfoEnabled()) {
+				logger.info("Eureka HTTP Client uses WebClient.");
+			}
 			WebClientDiscoveryClientOptionalArgs result = new WebClientDiscoveryClientOptionalArgs(
 					builder::getIfAvailable);
 			setupTLS(result, tlsProperties);
@@ -148,9 +171,9 @@ public class DiscoveryClientOptionalArgsConfiguration {
 
 	}
 
-	@Configuration
-	@ConditionalOnMissingClass({ "org.glassfish.jersey.client.JerseyClient",
-			"org.springframework.web.reactive.function.client.WebClient" })
+	@Configuration(proxyBeanMethods = false)
+	@Conditional(OnJerseyClientNotPresentOrNotEnabledCondition.class)
+	@ConditionalOnMissingClass("org.springframework.web.reactive.function.client.WebClient")
 	@ConditionalOnProperty(prefix = "eureka.client", name = "webclient.enabled", havingValue = "true")
 	protected static class WebClientNotFoundConfiguration {
 
@@ -162,4 +185,143 @@ public class DiscoveryClientOptionalArgsConfiguration {
 
 	}
 
+	@Configuration(proxyBeanMethods = false)
+	@Conditional(OnRestClientPresentAndEnabledCondition.class)
+	protected static class RestClientConfiguration {
+
+		@Bean
+		@ConditionalOnMissingBean
+		EurekaClientHttpRequestFactorySupplier defaultEurekaClientHttpRequestFactorySupplier(
+				RestClientTimeoutProperties restClientTimeoutProperties,
+				Set<EurekaClientHttpRequestFactorySupplier.RequestConfigCustomizer> requestConfigCustomizers) {
+			return new DefaultEurekaClientHttpRequestFactorySupplier(restClientTimeoutProperties,
+					requestConfigCustomizers);
+		}
+
+		@Bean
+		@ConditionalOnMissingBean(value = { AbstractDiscoveryClientOptionalArgs.class },
+				search = SearchStrategy.CURRENT)
+		public RestClientDiscoveryClientOptionalArgs restClientDiscoveryClientOptionalArgs(TlsProperties tlsProperties,
+				EurekaClientHttpRequestFactorySupplier eurekaClientHttpRequestFactorySupplier,
+				ObjectProvider<RestClient.Builder> restClientBuilderProvider)
+				throws GeneralSecurityException, IOException {
+			if (logger.isInfoEnabled()) {
+				logger.info("Eureka HTTP Client uses RestClient.");
+			}
+			RestClientDiscoveryClientOptionalArgs result = new RestClientDiscoveryClientOptionalArgs(
+					eurekaClientHttpRequestFactorySupplier,
+					() -> restClientBuilderProvider.getIfAvailable(RestClient::builder));
+			setupTLS(result, tlsProperties);
+			return result;
+		}
+
+		@Bean
+		@ConditionalOnMissingBean(value = TransportClientFactories.class, search = SearchStrategy.CURRENT)
+		public RestClientTransportClientFactories restClientTransportClientFactories(
+				RestClientDiscoveryClientOptionalArgs args) {
+			return new RestClientTransportClientFactories(args);
+		}
+
+	}
+
+	static class OnJerseyClientPresentAndEnabledCondition extends AllNestedConditions {
+
+		OnJerseyClientPresentAndEnabledCondition() {
+			super(ConfigurationPhase.REGISTER_BEAN);
+		}
+
+		@ConditionalOnClass(name = "org.glassfish.jersey.client.JerseyClient")
+		static class OnJerseyClientPresent {
+
+		}
+
+		@ConditionalOnProperty(value = "eureka.client.jersey.enabled", matchIfMissing = true)
+		static class OnJerseyClientEnabled {
+
+		}
+
+	}
+
+	static class OnJerseyClientNotPresentOrNotEnabledCondition extends AnyNestedCondition {
+
+		OnJerseyClientNotPresentOrNotEnabledCondition() {
+			super(ConfigurationPhase.REGISTER_BEAN);
+		}
+
+		@ConditionalOnMissingClass("org.glassfish.jersey.client.JerseyClient")
+		static class OnJerseyClientMissing {
+
+		}
+
+		@ConditionalOnProperty(value = "eureka.client.jersey.enabled", havingValue = "false")
+		static class OnJerseyClientDisabled {
+
+		}
+
+	}
+
+	/**
+	 * @deprecated {@link RestTemplate}-based implementation to be removed in favour of
+	 * {@link RestClient}-based implementation.
+	 */
+	@Deprecated(forRemoval = true)
+	static class OnRestTemplatePresentAndEnabledCondition extends AllNestedConditions {
+
+		OnRestTemplatePresentAndEnabledCondition() {
+			super(ConfigurationPhase.REGISTER_BEAN);
+		}
+
+		@ConditionalOnClass(name = "org.springframework.web.client.RestTemplate")
+		static class OnRestTemplatePresent {
+
+		}
+
+		@Conditional(OnJerseyClientNotPresentOrNotEnabledCondition.class)
+		static class OnJerseyClientNotPresentOrNotEnabled {
+
+		}
+
+		@ConditionalOnProperty(prefix = "eureka.client", name = "webclient.enabled", matchIfMissing = true,
+				havingValue = "false")
+		static class OnWebClientDisabled {
+
+		}
+
+		@ConditionalOnProperty(prefix = "eureka.client", name = "restclient.enabled", havingValue = "false",
+				matchIfMissing = true)
+		static class OnRestClientDisabled {
+
+		}
+
+	}
+
+	static class OnRestClientPresentAndEnabledCondition extends AllNestedConditions {
+
+		OnRestClientPresentAndEnabledCondition() {
+			super(ConfigurationPhase.REGISTER_BEAN);
+		}
+
+		@ConditionalOnClass(name = "org.springframework.web.client.RestClient")
+		static class OnRestClientPresent {
+
+		}
+
+		@Conditional(OnJerseyClientNotPresentOrNotEnabledCondition.class)
+		static class OnJerseyClientNotPresentOrNotEnabled {
+
+		}
+
+		@ConditionalOnProperty(prefix = "eureka.client", name = "webclient.enabled", matchIfMissing = true,
+				havingValue = "false")
+		static class OnWebClientDisabled {
+
+		}
+
+		@ConditionalOnProperty(prefix = "eureka.client", name = "restclient.enabled", havingValue = "true")
+		static class OnRestClientEnabled {
+
+		}
+
+	}
+
 }

spring-cloud-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/config/EurekaClientConfigServerAutoConfiguration.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2022 the original author or authors.
+ * Copyright 2013-present 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-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/config/EurekaConfigServerBootstrapConfiguration.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2022 the original author or authors.
+ * Copyright 2013-present 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.netflix.eureka.config;
 
+import java.util.Set;
+
 import com.netflix.discovery.EurekaClientConfig;
 import com.netflix.discovery.shared.transport.EurekaHttpClient;
 
@@ -29,12 +31,17 @@ import org.springframework.boot.autoconfigure.condition.SearchStrategy;
 import org.springframework.boot.autoconfigure.http.codec.CodecsAutoConfiguration;
 import org.springframework.boot.autoconfigure.web.reactive.function.client.WebClientAutoConfiguration;
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
+import org.springframework.boot.web.client.RestTemplateBuilder;
 import org.springframework.cloud.config.client.ConfigServerInstanceProvider;
 import org.springframework.cloud.config.client.ConfigServicePropertySourceLocator;
 import org.springframework.cloud.configuration.TlsProperties;
 import org.springframework.cloud.netflix.eureka.EurekaClientConfigBean;
+import org.springframework.cloud.netflix.eureka.RestClientTimeoutProperties;
+import org.springframework.cloud.netflix.eureka.RestTemplateTimeoutProperties;
 import org.springframework.cloud.netflix.eureka.http.DefaultEurekaClientHttpRequestFactorySupplier;
 import org.springframework.cloud.netflix.eureka.http.EurekaClientHttpRequestFactorySupplier;
+import org.springframework.cloud.netflix.eureka.http.RestClientEurekaHttpClient;
+import org.springframework.cloud.netflix.eureka.http.RestClientTransportClientFactory;
 import org.springframework.cloud.netflix.eureka.http.RestTemplateEurekaHttpClient;
 import org.springframework.cloud.netflix.eureka.http.RestTemplateTransportClientFactory;
 import org.springframework.cloud.netflix.eureka.http.WebClientEurekaHttpClient;
@@ -44,18 +51,23 @@ import org.springframework.context.annotation.Conditional;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.core.env.Environment;
 import org.springframework.lang.Nullable;
+import org.springframework.web.client.RestClient;
+import org.springframework.web.client.RestTemplate;
 import org.springframework.web.reactive.function.client.WebClient;
 
 /**
- * Bootstrap configuration for config client that wants to lookup the config server via
+ * Bootstrap configuration for config client that wants to look the config server up via
  * discovery.
  *
  * @author Dave Syer
+ * @author Armin Krezovic
+ * @author Wonchul Heo
+ * @author Olga Maciaszek-Sharma
  */
 @ConditionalOnClass(ConfigServicePropertySourceLocator.class)
 @Conditional(EurekaConfigServerBootstrapConfiguration.EurekaConfigServerBootstrapCondition.class)
 @Configuration(proxyBeanMethods = false)
-@EnableConfigurationProperties
+@EnableConfigurationProperties({ RestTemplateTimeoutProperties.class, RestClientTimeoutProperties.class })
 public class EurekaConfigServerBootstrapConfiguration {
 
 	@Bean
@@ -64,30 +76,73 @@ public class EurekaConfigServerBootstrapConfiguration {
 		return new EurekaClientConfigBean();
 	}
 
-	@Bean
-	@ConditionalOnMissingBean(EurekaHttpClient.class)
-	@ConditionalOnProperty(prefix = "eureka.client", name = "webclient.enabled", matchIfMissing = true,
-			havingValue = "false")
-	public RestTemplateEurekaHttpClient configDiscoveryRestTemplateEurekaHttpClient(EurekaClientConfigBean config,
-			Environment env, @Nullable TlsProperties properties,
-			EurekaClientHttpRequestFactorySupplier eurekaClientHttpRequestFactorySupplier) {
-		return (RestTemplateEurekaHttpClient) new RestTemplateTransportClientFactory(properties,
-				eurekaClientHttpRequestFactorySupplier)
-						.newClient(HostnameBasedUrlRandomizer.randomEndpoint(config, env));
-	}
-
-	@Bean
-	@ConditionalOnMissingBean
-	EurekaClientHttpRequestFactorySupplier defaultEurekaClientHttpRequestFactorySupplier() {
-		return new DefaultEurekaClientHttpRequestFactorySupplier();
-	}
-
 	@Bean
 	public ConfigServerInstanceProvider.Function eurekaConfigServerInstanceProvider(EurekaHttpClient client,
 			EurekaClientConfig config) {
 		return new EurekaConfigServerInstanceProvider(client, config)::getInstances;
 	}
 
+	/**
+	 * @deprecated {@link RestTemplate}-based implementation to be removed in favour of
+	 * {@link RestClient}-based implementation.
+	 */
+	@Configuration(proxyBeanMethods = false)
+	@Conditional(RestTemplateConfiguration.OnRestTemplatePresentAndEnabledCondition.class)
+	@Deprecated
+	static class RestTemplateConfiguration {
+
+		@Bean
+		@ConditionalOnMissingBean(EurekaHttpClient.class)
+		public RestTemplateEurekaHttpClient configDiscoveryRestTemplateEurekaHttpClient(EurekaClientConfigBean config,
+				Environment env, @Nullable TlsProperties properties,
+				EurekaClientHttpRequestFactorySupplier eurekaClientHttpRequestFactorySupplier,
+				ObjectProvider<RestTemplateBuilder> restTemplateBuilders) {
+			return (RestTemplateEurekaHttpClient) new RestTemplateTransportClientFactory(properties,
+					eurekaClientHttpRequestFactorySupplier, restTemplateBuilders::getIfAvailable)
+				.newClient(HostnameBasedUrlRandomizer.randomEndpoint(config, env));
+		}
+
+		@Bean
+		@ConditionalOnMissingBean
+		EurekaClientHttpRequestFactorySupplier defaultEurekaClientHttpRequestFactorySupplier(
+				RestTemplateTimeoutProperties restTemplateTimeoutProperties,
+				Set<EurekaClientHttpRequestFactorySupplier.RequestConfigCustomizer> requestConfigCustomizers) {
+			return new DefaultEurekaClientHttpRequestFactorySupplier(restTemplateTimeoutProperties,
+					requestConfigCustomizers);
+		}
+
+		/**
+		 * @deprecated {@link RestTemplate}-based implementation to be removed in favour
+		 * of {@link RestClient}-based implementation.
+		 */
+		@Deprecated(forRemoval = true)
+		static class OnRestTemplatePresentAndEnabledCondition extends AllNestedConditions {
+
+			OnRestTemplatePresentAndEnabledCondition() {
+				super(ConfigurationPhase.REGISTER_BEAN);
+			}
+
+			@ConditionalOnClass(name = "org.springframework.web.client.RestTemplate")
+			static class OnRestTemplatePresent {
+
+			}
+
+			@ConditionalOnProperty(prefix = "eureka.client", name = "webclient.enabled", matchIfMissing = true,
+					havingValue = "false")
+			static class OnWebClientDisabled {
+
+			}
+
+			@ConditionalOnProperty(prefix = "eureka.client", name = "restclient.enabled", havingValue = "false",
+					matchIfMissing = true)
+			static class OnRestClientDisabled {
+
+			}
+
+		}
+
+	}
+
 	@Configuration(proxyBeanMethods = false)
 	@ConditionalOnClass(name = "org.springframework.web.reactive.function.client.WebClient")
 	@ConditionalOnProperty(prefix = "eureka.client", name = "webclient.enabled", havingValue = "true")
@@ -99,7 +154,58 @@ public class EurekaConfigServerBootstrapConfiguration {
 		public WebClientEurekaHttpClient configDiscoveryWebClientEurekaHttpClient(EurekaClientConfigBean config,
 				ObjectProvider<WebClient.Builder> builder, Environment env) {
 			return (WebClientEurekaHttpClient) new WebClientTransportClientFactory(builder::getIfAvailable)
-					.newClient(HostnameBasedUrlRandomizer.randomEndpoint(config, env));
+				.newClient(HostnameBasedUrlRandomizer.randomEndpoint(config, env));
+		}
+
+	}
+
+	@Configuration(proxyBeanMethods = false)
+	@Conditional(RestClientConfiguration.OnRestClientPresentAndEnabledCondition.class)
+	static class RestClientConfiguration {
+
+		@Bean
+		@ConditionalOnMissingBean(EurekaHttpClient.class)
+		public RestClientEurekaHttpClient configDiscoveryRestClientEurekaHttpClient(EurekaClientConfigBean config,
+				@Nullable TlsProperties properties,
+				EurekaClientHttpRequestFactorySupplier eurekaClientHttpRequestFactorySupplier,
+				ObjectProvider<RestClient.Builder> restClientBuilderProvider, Environment env) {
+			return (RestClientEurekaHttpClient) new RestClientTransportClientFactory(properties,
+					eurekaClientHttpRequestFactorySupplier,
+					() -> restClientBuilderProvider.getIfAvailable(RestClient::builder))
+				.newClient(HostnameBasedUrlRandomizer.randomEndpoint(config, env));
+		}
+
+		@Bean
+		@ConditionalOnMissingBean
+		EurekaClientHttpRequestFactorySupplier defaultEurekaClientHttpRequestFactorySupplier(
+				RestClientTimeoutProperties restClientTimeoutProperties,
+				Set<EurekaClientHttpRequestFactorySupplier.RequestConfigCustomizer> requestConfigCustomizers) {
+			return new DefaultEurekaClientHttpRequestFactorySupplier(restClientTimeoutProperties,
+					requestConfigCustomizers);
+		}
+
+		static class OnRestClientPresentAndEnabledCondition extends AllNestedConditions {
+
+			OnRestClientPresentAndEnabledCondition() {
+				super(ConfigurationPhase.REGISTER_BEAN);
+			}
+
+			@ConditionalOnClass(name = "org.springframework.web.client.RestClient")
+			static class OnRestClientPresentCondition {
+
+			}
+
+			@ConditionalOnProperty(prefix = "eureka.client", name = "webclient.enabled", matchIfMissing = true,
+					havingValue = "false")
+			static class OnWebClientDisabled {
+
+			}
+
+			@ConditionalOnProperty(prefix = "eureka.client", name = "restclient.enabled", havingValue = "true")
+			static class OnRestClientEnabled {
+
+			}
+
 		}
 
 	}

spring-cloud-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/config/EurekaConfigServerBootstrapper.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2022 the original author or authors.
+ * Copyright 2013-present 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.
@@ -17,24 +17,23 @@
 package org.springframework.cloud.netflix.eureka.config;
 
 import java.util.Collections;
-import java.util.List;
 
 import com.netflix.discovery.shared.transport.EurekaHttpClient;
-import org.apache.commons.logging.Log;
 
 import org.springframework.boot.BootstrapContext;
 import org.springframework.boot.BootstrapRegistry;
 import org.springframework.boot.BootstrapRegistryInitializer;
 import org.springframework.boot.context.properties.bind.BindHandler;
 import org.springframework.boot.context.properties.bind.Binder;
-import org.springframework.cloud.client.ServiceInstance;
 import org.springframework.cloud.config.client.ConfigClientProperties;
+import org.springframework.cloud.config.client.ConfigServerConfigDataLocationResolver.PropertyResolver;
 import org.springframework.cloud.config.client.ConfigServerInstanceProvider;
 import org.springframework.cloud.configuration.TlsProperties;
 import org.springframework.cloud.netflix.eureka.EurekaClientConfigBean;
+import org.springframework.cloud.netflix.eureka.RestClientTimeoutProperties;
 import org.springframework.cloud.netflix.eureka.http.DefaultEurekaClientHttpRequestFactorySupplier;
 import org.springframework.cloud.netflix.eureka.http.EurekaClientHttpRequestFactorySupplier;
-import org.springframework.cloud.netflix.eureka.http.RestTemplateTransportClientFactory;
+import org.springframework.cloud.netflix.eureka.http.RestClientTransportClientFactory;
 import org.springframework.util.ClassUtils;
 
 public class EurekaConfigServerBootstrapper implements BootstrapRegistryInitializer {
@@ -45,52 +44,40 @@ public class EurekaConfigServerBootstrapper implements BootstrapRegistryInitiali
 			return;
 		}
 
-		// It is important that we pass a lambda for the Function or else we will get a
-		// ClassNotFoundException when config is not on the classpath
-		registry.registerIfAbsent(ConfigServerInstanceProvider.Function.class, EurekaFunction::create);
-	}
-
-	private static Boolean getDiscoveryEnabled(Binder binder) {
-		return binder.bind(ConfigClientProperties.CONFIG_DISCOVERY_ENABLED, Boolean.class).orElse(false)
-				&& binder.bind("eureka.client.enabled", Boolean.class).orElse(true)
-				&& binder.bind("spring.cloud.discovery.enabled", Boolean.class).orElse(true);
-	}
-
-	final static class EurekaFunction implements ConfigServerInstanceProvider.Function {
-
-		private final BootstrapContext context;
-
-		static EurekaFunction create(BootstrapContext context) {
-			return new EurekaFunction(context);
-		}
-
-		private EurekaFunction(BootstrapContext context) {
-			this.context = context;
-		}
-
-		@Override
-		public List<ServiceInstance> apply(String serviceId, Binder binder, BindHandler bindHandler, Log log) {
-			if (binder == null || !getDiscoveryEnabled(binder)) {
-				return Collections.emptyList();
+		registry.registerIfAbsent(EurekaClientConfigBean.class, context -> {
+			if (!getDiscoveryEnabled(context)) {
+				return null;
 			}
+			PropertyResolver propertyResolver = getPropertyResolver(context);
+			return propertyResolver.resolveConfigurationProperties(EurekaClientConfigBean.PREFIX,
+					EurekaClientConfigBean.class, EurekaClientConfigBean::new);
+		});
 
-			EurekaClientConfigBean config = binder.bind(EurekaClientConfigBean.PREFIX, EurekaClientConfigBean.class)
-					.orElseGet(EurekaClientConfigBean::new);
-			EurekaHttpClient httpClient = new RestTemplateTransportClientFactory(
+		registry.registerIfAbsent(ConfigServerInstanceProvider.Function.class, context -> {
+			if (!getDiscoveryEnabled(context)) {
+				return (id) -> Collections.emptyList();
+			}
+			EurekaClientConfigBean config = context.get(EurekaClientConfigBean.class);
+			EurekaHttpClient httpClient = new RestClientTransportClientFactory(
 					context.getOrElse(TlsProperties.class, null),
 					context.getOrElse(EurekaClientHttpRequestFactorySupplier.class,
-							new DefaultEurekaClientHttpRequestFactorySupplier()))
-									.newClient(HostnameBasedUrlRandomizer.randomEndpoint(config, binder));
-			return new EurekaConfigServerInstanceProvider(httpClient, config).getInstances(serviceId);
-		}
+							new DefaultEurekaClientHttpRequestFactorySupplier(new RestClientTimeoutProperties(),
+									Collections.emptySet())))
+				.newClient(HostnameBasedUrlRandomizer.randomEndpoint(config, getPropertyResolver(context)));
+			return new EurekaConfigServerInstanceProvider(httpClient, config)::getInstances;
+		});
+	}
 
-		@Override
-		public List<ServiceInstance> apply(String serviceId) {
-			// This should never be called now but is here for backward
-			// compatibility
-			return apply(serviceId, null, null, null);
-		}
+	private static PropertyResolver getPropertyResolver(BootstrapContext context) {
+		return context.getOrElseSupply(PropertyResolver.class,
+				() -> new PropertyResolver(context.get(Binder.class), context.getOrElse(BindHandler.class, null)));
+	}
 
+	public static Boolean getDiscoveryEnabled(BootstrapContext bootstrapContext) {
+		PropertyResolver propertyResolver = getPropertyResolver(bootstrapContext);
+		return propertyResolver.get(ConfigClientProperties.CONFIG_DISCOVERY_ENABLED, Boolean.class, false)
+				&& propertyResolver.get("eureka.client.enabled", Boolean.class, true)
+				&& propertyResolver.get("spring.cloud.discovery.enabled", Boolean.class, true);
 	}
 
 }

spring-cloud-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/config/EurekaConfigServerInstanceProvider.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2022 the original author or authors.
+ * Copyright 2013-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -31,6 +31,9 @@ import org.springframework.cloud.client.ServiceInstance;
 import org.springframework.cloud.netflix.eureka.EurekaServiceInstance;
 import org.springframework.http.HttpStatus;
 
+/**
+ * @author Tang Xiong
+ */
 public class EurekaConfigServerInstanceProvider {
 
 	private final Log log;
@@ -53,7 +56,11 @@ public class EurekaConfigServerInstanceProvider {
 		if (log.isDebugEnabled()) {
 			log.debug("eurekaConfigServerInstanceProvider finding instances for " + serviceId);
 		}
-		EurekaHttpResponse<Applications> response = client.getApplications(config.getRegion());
+		String remoteRegionsStr = config.fetchRegistryForRemoteRegions();
+		String[] remoteRegions = remoteRegionsStr == null ? null : remoteRegionsStr.split(",");
+		EurekaHttpResponse<Applications> response = config.getRegistryRefreshSingleVipAddress() == null
+				? client.getApplications(remoteRegions)
+				: client.getVip(config.getRegistryRefreshSingleVipAddress(), remoteRegions);
 		List<ServiceInstance> instances = new ArrayList<>();
 		if (!isSuccessful(response) || response.getEntity() == null) {
 			return instances;

spring-cloud-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/config/EurekaTlsProperties.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2022 the original author or authors.
+ * Copyright 2017-present 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-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/config/HostnameBasedUrlRandomizer.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2022 the original author or authors.
+ * Copyright 2013-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -23,12 +23,15 @@ import com.netflix.discovery.endpoint.EndpointUtils;
 import com.netflix.discovery.shared.resolver.DefaultEndpoint;
 
 import org.springframework.boot.context.properties.bind.Binder;
+import org.springframework.cloud.config.client.ConfigServerConfigDataLocationResolver.PropertyResolver;
 import org.springframework.cloud.netflix.eureka.EurekaClientConfigBean;
 import org.springframework.core.env.Environment;
 import org.springframework.util.StringUtils;
 
 public final class HostnameBasedUrlRandomizer implements EndpointUtils.ServiceUrlRandomizer {
 
+	private static final String EUREKA_INSTANCE_HOSTNAME = "eureka.instance.hostname";
+
 	private final String hostname;
 
 	HostnameBasedUrlRandomizer(String hostname) {
@@ -64,12 +67,17 @@ public final class HostnameBasedUrlRandomizer implements EndpointUtils.ServiceUr
 	}
 
 	public static DefaultEndpoint randomEndpoint(EurekaClientConfig config, Environment env) {
-		String hostname = env.getProperty("eureka.instance.hostname");
+		String hostname = env.getProperty(EUREKA_INSTANCE_HOSTNAME);
 		return new DefaultEndpoint(getEurekaUrl(config, hostname));
 	}
 
 	public static DefaultEndpoint randomEndpoint(EurekaClientConfig config, Binder binder) {
-		String hostname = binder.bind("eureka.instance.hostname", String.class).orElseGet(() -> null);
+		String hostname = binder.bind(EUREKA_INSTANCE_HOSTNAME, String.class).orElseGet(() -> null);
+		return new DefaultEndpoint(getEurekaUrl(config, hostname));
+	}
+
+	public static DefaultEndpoint randomEndpoint(EurekaClientConfig config, PropertyResolver propertyResolver) {
+		String hostname = propertyResolver.get(EUREKA_INSTANCE_HOSTNAME, String.class, null);
 		return new DefaultEndpoint(getEurekaUrl(config, hostname));
 	}
 

spring-cloud-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/http/DefaultEurekaClientHttpRequestFactorySupplier.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2022 the original author or authors.
+ * Copyright 2013-present 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.
@@ -16,11 +16,14 @@
 
 package org.springframework.cloud.netflix.eureka.http;
 
+import java.util.Collections;
+import java.util.Set;
 import java.util.concurrent.TimeUnit;
 
 import javax.net.ssl.HostnameVerifier;
 import javax.net.ssl.SSLContext;
 
+import org.apache.hc.client5.http.config.ConnectionConfig;
 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.HttpClientBuilder;
@@ -32,6 +35,7 @@ import org.apache.hc.core5.http.io.SocketConfig;
 import org.apache.hc.core5.util.Timeout;
 
 import org.springframework.cloud.netflix.eureka.RestTemplateTimeoutProperties;
+import org.springframework.cloud.netflix.eureka.TimeoutProperties;
 import org.springframework.http.client.ClientHttpRequestFactory;
 import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
 import org.springframework.lang.Nullable;
@@ -47,31 +51,52 @@ import org.springframework.lang.Nullable;
  */
 public class DefaultEurekaClientHttpRequestFactorySupplier implements EurekaClientHttpRequestFactorySupplier {
 
-	private final RestTemplateTimeoutProperties restTemplateTimeoutProperties;
+	private final TimeoutProperties timeoutProperties;
+
+	// TODO: switch to final after removing deprecated interfaces
+	private Set<RequestConfigCustomizer> requestConfigCustomizers = Collections.emptySet();
 
 	/**
 	 * @deprecated in favour of
-	 * {@link DefaultEurekaClientHttpRequestFactorySupplier#DefaultEurekaClientHttpRequestFactorySupplier(RestTemplateTimeoutProperties)}
+	 * {@link DefaultEurekaClientHttpRequestFactorySupplier#DefaultEurekaClientHttpRequestFactorySupplier(TimeoutProperties, Set)}
 	 */
-	@Deprecated
+	@Deprecated(forRemoval = true)
 	public DefaultEurekaClientHttpRequestFactorySupplier() {
-		this.restTemplateTimeoutProperties = new RestTemplateTimeoutProperties();
+		this.timeoutProperties = new RestTemplateTimeoutProperties();
 	}
 
-	public DefaultEurekaClientHttpRequestFactorySupplier(RestTemplateTimeoutProperties restTemplateTimeoutProperties) {
-		this.restTemplateTimeoutProperties = restTemplateTimeoutProperties;
+	/**
+	 * @deprecated in favour of
+	 * {@link DefaultEurekaClientHttpRequestFactorySupplier#DefaultEurekaClientHttpRequestFactorySupplier(TimeoutProperties, Set)}
+	 */
+	@Deprecated(forRemoval = true)
+	public DefaultEurekaClientHttpRequestFactorySupplier(RestTemplateTimeoutProperties timeoutProperties) {
+		this.timeoutProperties = timeoutProperties;
+	}
+
+	/**
+	 * @deprecated in favour of
+	 * {@link DefaultEurekaClientHttpRequestFactorySupplier#DefaultEurekaClientHttpRequestFactorySupplier(TimeoutProperties, Set)}
+	 */
+	@Deprecated(forRemoval = true)
+	public DefaultEurekaClientHttpRequestFactorySupplier(TimeoutProperties timeoutProperties) {
+		this.timeoutProperties = timeoutProperties;
+	}
+
+	public DefaultEurekaClientHttpRequestFactorySupplier(TimeoutProperties timeoutProperties,
+			Set<RequestConfigCustomizer> requestConfigCustomizers) {
+		this.timeoutProperties = timeoutProperties;
+		this.requestConfigCustomizers = requestConfigCustomizers;
 	}
 
 	@Override
 	public ClientHttpRequestFactory get(SSLContext sslContext, @Nullable HostnameVerifier hostnameVerifier) {
 		HttpClientBuilder httpClientBuilder = HttpClientBuilder.create();
-		if (sslContext != null || hostnameVerifier != null || restTemplateTimeoutProperties != null) {
-			httpClientBuilder.setConnectionManager(
-					buildConnectionManager(sslContext, hostnameVerifier, restTemplateTimeoutProperties));
-		}
-		if (restTemplateTimeoutProperties != null) {
-			httpClientBuilder.setDefaultRequestConfig(buildRequestConfig());
+		if (sslContext != null || hostnameVerifier != null || timeoutProperties != null) {
+			httpClientBuilder
+				.setConnectionManager(buildConnectionManager(sslContext, hostnameVerifier, timeoutProperties));
 		}
+		httpClientBuilder.setDefaultRequestConfig(buildRequestConfig());
 
 		CloseableHttpClient httpClient = httpClientBuilder.build();
 		HttpComponentsClientHttpRequestFactory requestFactory = new HttpComponentsClientHttpRequestFactory();
@@ -80,11 +105,11 @@ public class DefaultEurekaClientHttpRequestFactorySupplier implements EurekaClie
 	}
 
 	private HttpClientConnectionManager buildConnectionManager(SSLContext sslContext, HostnameVerifier hostnameVerifier,
-			RestTemplateTimeoutProperties restTemplateTimeoutProperties) {
+			TimeoutProperties timeoutProperties) {
 		PoolingHttpClientConnectionManagerBuilder connectionManagerBuilder = PoolingHttpClientConnectionManagerBuilder
-				.create();
+			.create();
 		SSLConnectionSocketFactoryBuilder sslConnectionSocketFactoryBuilder = SSLConnectionSocketFactoryBuilder
-				.create();
+			.create();
 		if (sslContext != null) {
 			sslConnectionSocketFactoryBuilder.setSslContext(sslContext);
 		}
@@ -92,20 +117,25 @@ public class DefaultEurekaClientHttpRequestFactorySupplier implements EurekaClie
 			sslConnectionSocketFactoryBuilder.setHostnameVerifier(hostnameVerifier);
 		}
 		connectionManagerBuilder.setSSLSocketFactory(sslConnectionSocketFactoryBuilder.build());
-		if (restTemplateTimeoutProperties != null) {
+		if (timeoutProperties != null) {
 			connectionManagerBuilder.setDefaultSocketConfig(SocketConfig.custom()
-					.setSoTimeout(Timeout.of(restTemplateTimeoutProperties.getSocketTimeout(), TimeUnit.MILLISECONDS))
-					.build());
+				.setSoTimeout(Timeout.of(timeoutProperties.getSocketTimeout(), TimeUnit.MILLISECONDS))
+				.build());
+			connectionManagerBuilder.setDefaultConnectionConfig(ConnectionConfig.custom()
+				.setConnectTimeout(Timeout.of(timeoutProperties.getConnectTimeout(), TimeUnit.MILLISECONDS))
+				.build());
 		}
 		return connectionManagerBuilder.build();
 	}
 
 	private RequestConfig buildRequestConfig() {
-		return RequestConfig.custom()
-				.setConnectTimeout(Timeout.of(restTemplateTimeoutProperties.getConnectTimeout(), TimeUnit.MILLISECONDS))
-				.setConnectionRequestTimeout(
-						Timeout.of(restTemplateTimeoutProperties.getConnectRequestTimeout(), TimeUnit.MILLISECONDS))
-				.build();
+		RequestConfig.Builder requestConfigBuilder = RequestConfig.custom();
+		if (timeoutProperties != null) {
+			requestConfigBuilder.setConnectionRequestTimeout(
+					Timeout.of(timeoutProperties.getConnectRequestTimeout(), TimeUnit.MILLISECONDS));
+		}
+		requestConfigCustomizers.forEach(customizer -> customizer.customize(requestConfigBuilder));
+		return requestConfigBuilder.build();
 	}
 
 }

spring-cloud-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/http/EurekaApplications.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2022 the original author or authors.
+ * Copyright 2017-present 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-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/http/EurekaClientHttpRequestFactorySupplier.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2022 the original author or authors.
+ * Copyright 2013-present 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.netflix.eureka.http;
 import javax.net.ssl.HostnameVerifier;
 import javax.net.ssl.SSLContext;
 
+import org.apache.hc.client5.http.config.RequestConfig;
+
 import org.springframework.http.client.ClientHttpRequestFactory;
 import org.springframework.lang.Nullable;
 
@@ -38,4 +40,17 @@ public interface EurekaClientHttpRequestFactorySupplier {
 	 */
 	ClientHttpRequestFactory get(SSLContext sslContext, @Nullable HostnameVerifier hostnameVerifier);
 
+	/**
+	 * Allows customising the {@link RequestConfig} of the underlying Apache HC5 instance.
+	 *
+	 * @author Olga Maciaszek-Sharma
+	 * @since 4.2.1
+	 */
+	@FunctionalInterface
+	interface RequestConfigCustomizer {
+
+		void customize(RequestConfig.Builder builder);
+
+	}
+
 }

spring-cloud-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/http/EurekaHttpClientUtils.java

@@ -0,0 +1,147 @@
+/*
+ * Copyright 2017-present 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.netflix.eureka.http;
+
+import java.net.URI;
+import java.net.URISyntaxException;
+import java.util.Optional;
+
+import javax.net.ssl.SSLContext;
+
+import com.fasterxml.jackson.databind.BeanDescription;
+import com.fasterxml.jackson.databind.DeserializationFeature;
+import com.fasterxml.jackson.databind.JsonSerializer;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.PropertyNamingStrategies;
+import com.fasterxml.jackson.databind.SerializationConfig;
+import com.fasterxml.jackson.databind.SerializationFeature;
+import com.fasterxml.jackson.databind.module.SimpleModule;
+import com.fasterxml.jackson.databind.ser.BeanSerializerModifier;
+import com.fasterxml.jackson.databind.ser.std.BeanSerializerBase;
+import com.netflix.appinfo.InstanceInfo;
+import com.netflix.discovery.converters.jackson.mixin.ApplicationsJsonMixIn;
+import com.netflix.discovery.converters.jackson.mixin.InstanceInfoJsonMixIn;
+import com.netflix.discovery.converters.jackson.serializer.InstanceInfoJsonBeanSerializer;
+import com.netflix.discovery.shared.Applications;
+import com.netflix.discovery.shared.transport.EurekaHttpClient;
+
+import org.springframework.cloud.configuration.SSLContextFactory;
+import org.springframework.cloud.configuration.TlsProperties;
+import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
+import org.springframework.lang.Nullable;
+
+/**
+ * Utility class for dealing with {@link EurekaHttpClient}.
+ *
+ * @author Daniel Lavoie
+ * @author Wonchul Heo
+ * @author Olga Maciaszek-Sharma
+ * @since 4.2.0
+ */
+final class EurekaHttpClientUtils {
+
+	private EurekaHttpClientUtils() {
+		throw new AssertionError("Must not instantiate constant utility class");
+	}
+
+	/**
+	 * Provides the serialization configurations required by the Eureka Server. JSON
+	 * content exchanged with eureka requires a root node matching the entity being
+	 * serialized or deserialized. Achieved with
+	 * {@link SerializationFeature#WRAP_ROOT_VALUE} and
+	 * {@link DeserializationFeature#UNWRAP_ROOT_VALUE}.
+	 * {@link PropertyNamingStrategies.SnakeCaseStrategy} is applied to the underlying
+	 * {@link ObjectMapper}.
+	 * @return a {@link MappingJackson2HttpMessageConverter} object
+	 */
+	static MappingJackson2HttpMessageConverter mappingJacksonHttpMessageConverter() {
+		final MappingJackson2HttpMessageConverter converter = new MappingJackson2HttpMessageConverter();
+		converter.setObjectMapper(objectMapper());
+		return converter;
+	}
+
+	/**
+	 * Provides the serialization configurations required by the Eureka Server. JSON
+	 * content exchanged with eureka requires a root node matching the entity being
+	 * serialized or deserialized. Achieved with
+	 * {@link SerializationFeature#WRAP_ROOT_VALUE} and
+	 * {@link DeserializationFeature#UNWRAP_ROOT_VALUE}.
+	 * {@link PropertyNamingStrategies.SnakeCaseStrategy} is applied to the underlying
+	 * {@link ObjectMapper}.
+	 * @return a {@link ObjectMapper} object
+	 */
+	static ObjectMapper objectMapper() {
+		final ObjectMapper objectMapper = new ObjectMapper();
+		objectMapper.setPropertyNamingStrategy(PropertyNamingStrategies.SNAKE_CASE);
+
+		final SimpleModule jsonModule = new SimpleModule();
+		jsonModule.setSerializerModifier(createJsonSerializerModifier());
+		objectMapper.registerModule(jsonModule);
+
+		objectMapper.configure(SerializationFeature.WRAP_ROOT_VALUE, true);
+		objectMapper.configure(DeserializationFeature.UNWRAP_ROOT_VALUE, true);
+		objectMapper.addMixIn(Applications.class, ApplicationsJsonMixIn.class);
+		objectMapper.addMixIn(InstanceInfo.class, InstanceInfoJsonMixIn.class);
+
+		return objectMapper;
+	}
+
+	private static BeanSerializerModifier createJsonSerializerModifier() {
+		return new BeanSerializerModifier() {
+			@Override
+			public JsonSerializer<?> modifySerializer(SerializationConfig config, BeanDescription beanDesc,
+					JsonSerializer<?> serializer) {
+				if (beanDesc.getBeanClass().isAssignableFrom(InstanceInfo.class)) {
+					return new InstanceInfoJsonBeanSerializer((BeanSerializerBase) serializer, false);
+				}
+				return serializer;
+			}
+		};
+	}
+
+	@Nullable
+	static UserInfo extractUserInfo(String serviceUrl) {
+		try {
+			final URI serviceURI = new URI(serviceUrl);
+			if (serviceURI.getUserInfo() != null) {
+				final String[] credentials = serviceURI.getUserInfo().split(":");
+				if (credentials.length == 2) {
+					return new UserInfo(credentials[0], credentials[1]);
+				}
+			}
+		}
+		catch (URISyntaxException ignore) {
+		}
+		return null;
+	}
+
+	static Optional<SSLContext> context(TlsProperties properties) {
+		if (properties == null || !properties.isEnabled()) {
+			return Optional.empty();
+		}
+		try {
+			return Optional.of(new SSLContextFactory(properties).createSSLContext());
+		}
+		catch (Exception e) {
+			throw new IllegalStateException(e);
+		}
+	}
+
+	record UserInfo(String username, String password) {
+	}
+
+}

spring-cloud-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/http/NotFoundHttpResponse.java

@@ -0,0 +1,67 @@
+/*
+ * Copyright 2017-present 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.netflix.eureka.http;
+
+import java.io.IOException;
+import java.io.InputStream;
+
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpStatusCode;
+import org.springframework.http.client.ClientHttpResponse;
+
+/**
+ * Response that ignores body, specifically for 404 errors.
+ *
+ * @author Spencer Gibb
+ * @author Wonchul Heo
+ * @since 4.2.0
+ */
+class NotFoundHttpResponse implements ClientHttpResponse {
+
+	private final ClientHttpResponse response;
+
+	NotFoundHttpResponse(ClientHttpResponse response) {
+		this.response = response;
+	}
+
+	@Override
+	public HttpStatusCode getStatusCode() throws IOException {
+		return response.getStatusCode();
+	}
+
+	@Override
+	public String getStatusText() throws IOException {
+		return response.getStatusText();
+	}
+
+	@Override
+	public void close() {
+		response.close();
+	}
+
+	@Override
+	public InputStream getBody() throws IOException {
+		// ignore body on 404 for heartbeat, see gh-4145
+		return null;
+	}
+
+	@Override
+	public HttpHeaders getHeaders() {
+		return response.getHeaders();
+	}
+
+}

spring-cloud-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/http/RestClientDiscoveryClientOptionalArgs.java

@@ -0,0 +1,55 @@
+/*
+ * Copyright 2017-present 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.netflix.eureka.http;
+
+import java.util.function.Supplier;
+
+import com.netflix.discovery.AbstractDiscoveryClientOptionalArgs;
+import jakarta.ws.rs.client.ClientRequestFilter;
+
+import org.springframework.web.client.RestClient;
+
+/**
+ * {@link RestClient} implementation of DiscoveryClientOptionalArgs that supports
+ * supplying {@link ClientRequestFilter}.
+ *
+ * @author Wonchul Heo
+ * @author Olga Maciaszek-Sharma
+ * @since 4.2.0
+ */
+public class RestClientDiscoveryClientOptionalArgs extends AbstractDiscoveryClientOptionalArgs<Void> {
+
+	private final EurekaClientHttpRequestFactorySupplier eurekaClientHttpRequestFactorySupplier;
+
+	private final Supplier<RestClient.Builder> restClientBuilderSupplier;
+
+	public RestClientDiscoveryClientOptionalArgs(
+			EurekaClientHttpRequestFactorySupplier eurekaClientHttpRequestFactorySupplier,
+			Supplier<RestClient.Builder> restClientBuilderSupplier) {
+		this.eurekaClientHttpRequestFactorySupplier = eurekaClientHttpRequestFactorySupplier;
+		this.restClientBuilderSupplier = restClientBuilderSupplier;
+	}
+
+	EurekaClientHttpRequestFactorySupplier getEurekaClientHttpRequestFactorySupplier() {
+		return eurekaClientHttpRequestFactorySupplier;
+	}
+
+	Supplier<RestClient.Builder> getRestClientBuilderSupplier() {
+		return restClientBuilderSupplier;
+	}
+
+}

spring-cloud-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/http/RestClientEurekaHttpClient.java

@@ -0,0 +1,238 @@
+/*
+ * Copyright 2017-present 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.netflix.eureka.http;
+
+import java.net.URI;
+import java.util.Map;
+import java.util.Optional;
+import java.util.function.Function;
+
+import com.netflix.appinfo.InstanceInfo;
+import com.netflix.appinfo.InstanceInfo.InstanceStatus;
+import com.netflix.discovery.shared.Application;
+import com.netflix.discovery.shared.Applications;
+import com.netflix.discovery.shared.transport.EurekaHttpClient;
+import com.netflix.discovery.shared.transport.EurekaHttpResponse;
+import com.netflix.discovery.shared.transport.EurekaHttpResponse.EurekaHttpResponseBuilder;
+import com.netflix.discovery.util.StringUtil;
+
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.MediaType;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.client.RestClient;
+import org.springframework.web.util.UriBuilder;
+
+import static com.netflix.discovery.shared.transport.EurekaHttpResponse.anEurekaHttpResponse;
+
+/**
+ * {@link RestClient} implementation of {@link EurekaHttpClient}.
+ *
+ * @author Wonchul Heo
+ * @since 4.2.0
+ */
+public class RestClientEurekaHttpClient implements EurekaHttpClient {
+
+	private final RestClient restClient;
+
+	public RestClientEurekaHttpClient(RestClient restClient) {
+		this.restClient = restClient;
+	}
+
+	@Override
+	public EurekaHttpResponse<Void> register(InstanceInfo info) {
+		final ResponseEntity<Void> response = restClient.post()
+			.uri(builder -> builder.pathSegment("apps", info.getAppName()).build())
+			.body(info)
+			.header(HttpHeaders.ACCEPT_ENCODING, "gzip")
+			.header(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE)
+			.retrieve()
+			.toBodilessEntity();
+		return eurekaHttpResponse(response);
+	}
+
+	@Override
+	public EurekaHttpResponse<Void> cancel(String appName, String id) {
+		final ResponseEntity<Void> response = restClient.delete()
+			.uri(builder -> builder.pathSegment("apps", appName, id).build())
+			.retrieve()
+			.toBodilessEntity();
+		return eurekaHttpResponse(response);
+	}
+
+	@Override
+	public EurekaHttpResponse<InstanceInfo> sendHeartBeat(String appName, String id, InstanceInfo info,
+			InstanceStatus overriddenStatus) {
+		final Function<UriBuilder, URI> uriFunction = builder -> builder.pathSegment("apps", appName, id)
+			.queryParam("status", info.getStatus().toString())
+			.queryParam("lastDirtyTimestamp", info.getLastDirtyTimestamp().toString())
+			.queryParamIfPresent("overriddenstatus", Optional.ofNullable(overriddenStatus).map(InstanceStatus::name))
+			.build();
+
+		final ResponseEntity<InstanceInfo> response = restClient.put()
+			.uri(uriFunction)
+			.header(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE)
+			.header(HttpHeaders.ACCEPT, MediaType.APPLICATION_JSON_VALUE)
+			.retrieve()
+			.toEntity(InstanceInfo.class);
+
+		final EurekaHttpResponseBuilder<InstanceInfo> builder = anEurekaHttpResponse(statusCodeValueOf(response),
+				InstanceInfo.class)
+			.headers(headersOf(response));
+
+		final InstanceInfo entity = response.getBody();
+		if (entity != null) {
+			builder.entity(entity);
+		}
+
+		return builder.build();
+	}
+
+	@Override
+	public EurekaHttpResponse<Void> statusUpdate(String appName, String id, InstanceStatus newStatus,
+			InstanceInfo info) {
+		final Function<UriBuilder, URI> uriFunction = builder -> builder.pathSegment("apps", appName, id, "status")
+			.queryParam("value", newStatus.name())
+			.queryParam("lastDirtyTimestamp", info.getLastDirtyTimestamp().toString())
+			.build();
+
+		final ResponseEntity<Void> response = restClient.put()
+			.uri(uriFunction)
+			.header(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE)
+			.retrieve()
+			.toBodilessEntity();
+		return eurekaHttpResponse(response);
+	}
+
+	@Override
+	public EurekaHttpResponse<Void> deleteStatusOverride(String appName, String id, InstanceInfo info) {
+		final Function<UriBuilder, URI> uriFunction = builder -> builder.pathSegment("apps", appName, id, "status")
+			.queryParam("lastDirtyTimestamp", info.getLastDirtyTimestamp().toString())
+			.build();
+
+		final ResponseEntity<Void> response = restClient.delete()
+			.uri(uriFunction)
+			.header(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE)
+			.retrieve()
+			.toBodilessEntity();
+		return eurekaHttpResponse(response);
+	}
+
+	@Override
+	public EurekaHttpResponse<Applications> getApplications(String... regions) {
+		return getApplicationsInternal("/apps/", regions);
+	}
+
+	@Override
+	public EurekaHttpResponse<Applications> getDelta(String... regions) {
+		return getApplicationsInternal("/apps/delta", regions);
+	}
+
+	@Override
+	public EurekaHttpResponse<Applications> getVip(String vipAddress, String... regions) {
+		return getApplicationsInternal("/vips/" + vipAddress, regions);
+	}
+
+	@Override
+	public EurekaHttpResponse<Applications> getSecureVip(String secureVipAddress, String... regions) {
+		return getApplicationsInternal("/svips/" + secureVipAddress, regions);
+	}
+
+	@Override
+	public EurekaHttpResponse<Application> getApplication(String appName) {
+
+		final ResponseEntity<Application> response = restClient.get()
+			.uri("/apps/" + appName)
+			.header(HttpHeaders.ACCEPT, MediaType.APPLICATION_JSON_VALUE)
+			.retrieve()
+			.toEntity(Application.class);
+
+		final int statusCode = statusCodeValueOf(response);
+		final Application body = response.getBody();
+
+		final Application application = statusCode == HttpStatus.OK.value() && body != null ? body : null;
+
+		return anEurekaHttpResponse(statusCode, application).headers(headersOf(response)).build();
+	}
+
+	@Override
+	public EurekaHttpResponse<InstanceInfo> getInstance(String appName, String id) {
+		return getInstanceInternal("/apps/" + appName + '/' + id);
+	}
+
+	@Override
+	public EurekaHttpResponse<InstanceInfo> getInstance(String id) {
+		return getInstanceInternal("/instances/" + id);
+	}
+
+	@Override
+	public void shutdown() {
+	}
+
+	public RestClient getRestClient() {
+		return restClient;
+	}
+
+	private EurekaHttpResponse<Applications> getApplicationsInternal(String urlPath, String[] regions) {
+		final Function<UriBuilder, URI> uriFunction = builder -> builder
+			.queryParamIfPresent("regions",
+					Optional.ofNullable(regions).filter(it -> it.length > 0).map(StringUtil::join))
+			.build();
+
+		final ResponseEntity<Applications> response = restClient.get()
+			.uri(urlPath, uriFunction)
+			.header(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE)
+			.header(HttpHeaders.ACCEPT, MediaType.APPLICATION_JSON_VALUE)
+			.retrieve()
+			.toEntity(Applications.class);
+
+		final int statusCode = statusCodeValueOf(response);
+		final Applications body = response.getBody();
+
+		return anEurekaHttpResponse(statusCode, statusCode == HttpStatus.OK.value() && body != null ? body : null)
+			.headers(headersOf(response))
+			.build();
+	}
+
+	private EurekaHttpResponse<InstanceInfo> getInstanceInternal(String urlPath) {
+		final ResponseEntity<InstanceInfo> response = restClient.get()
+			.uri(urlPath)
+			.header(HttpHeaders.ACCEPT, MediaType.APPLICATION_JSON_VALUE)
+			.retrieve()
+			.toEntity(InstanceInfo.class);
+
+		final int statusCode = statusCodeValueOf(response);
+		final InstanceInfo body = response.getBody();
+
+		return anEurekaHttpResponse(statusCode, statusCode == HttpStatus.OK.value() && body != null ? body : null)
+			.headers(headersOf(response))
+			.build();
+	}
+
+	private static Map<String, String> headersOf(ResponseEntity<?> response) {
+		return response.getHeaders().toSingleValueMap();
+	}
+
+	private static int statusCodeValueOf(ResponseEntity<?> response) {
+		return response.getStatusCode().value();
+	}
+
+	private static EurekaHttpResponse<Void> eurekaHttpResponse(ResponseEntity<?> response) {
+		return anEurekaHttpResponse(statusCodeValueOf(response)).headers(headersOf(response)).build();
+	}
+
+}

spring-cloud-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/http/RestClientTransportClientFactories.java

@@ -0,0 +1,58 @@
+/*
+ * Copyright 2017-present 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.netflix.eureka.http;
+
+import java.util.Collection;
+import java.util.Optional;
+
+import javax.net.ssl.HostnameVerifier;
+import javax.net.ssl.SSLContext;
+
+import com.netflix.appinfo.InstanceInfo;
+import com.netflix.discovery.EurekaClientConfig;
+import com.netflix.discovery.shared.transport.TransportClientFactory;
+import com.netflix.discovery.shared.transport.jersey.TransportClientFactories;
+
+/**
+ * @author Wonchul Heo
+ * @author Olga Maciaszek-Sharma
+ * @since 4.2.0
+ */
+public class RestClientTransportClientFactories implements TransportClientFactories<Void> {
+
+	private final RestClientDiscoveryClientOptionalArgs args;
+
+	public RestClientTransportClientFactories(RestClientDiscoveryClientOptionalArgs args) {
+		this.args = args;
+	}
+
+	@Override
+	public TransportClientFactory newTransportClientFactory(EurekaClientConfig clientConfig,
+			Collection<Void> additionalFilters, InstanceInfo myInstanceInfo) {
+		return new RestClientTransportClientFactory(args.getSSLContext(), args.getHostnameVerifier(),
+				args.getEurekaClientHttpRequestFactorySupplier(), args.getRestClientBuilderSupplier());
+	}
+
+	@Override
+	public TransportClientFactory newTransportClientFactory(final EurekaClientConfig clientConfig,
+			final Collection<Void> additionalFilters, final InstanceInfo myInstanceInfo,
+			final Optional<SSLContext> sslContext, final Optional<HostnameVerifier> hostnameVerifier) {
+		return new RestClientTransportClientFactory(args.getSSLContext(), args.getHostnameVerifier(),
+				args.getEurekaClientHttpRequestFactorySupplier(), args.getRestClientBuilderSupplier());
+	}
+
+}

spring-cloud-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/http/RestClientTransportClientFactory.java

@@ -0,0 +1,122 @@
+/*
+ * Copyright 2017-present 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.netflix.eureka.http;
+
+import java.util.Optional;
+import java.util.function.Supplier;
+
+import javax.net.ssl.HostnameVerifier;
+import javax.net.ssl.SSLContext;
+
+import com.netflix.discovery.shared.resolver.EurekaEndpoint;
+import com.netflix.discovery.shared.transport.EurekaHttpClient;
+import com.netflix.discovery.shared.transport.TransportClientFactory;
+
+import org.springframework.cloud.configuration.TlsProperties;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.HttpStatusCode;
+import org.springframework.http.client.ClientHttpRequestFactory;
+import org.springframework.http.client.ClientHttpResponse;
+import org.springframework.http.client.support.BasicAuthenticationInterceptor;
+import org.springframework.web.client.RestClient;
+import org.springframework.web.util.UriComponentsBuilder;
+
+import static org.springframework.cloud.netflix.eureka.http.EurekaHttpClientUtils.context;
+import static org.springframework.cloud.netflix.eureka.http.EurekaHttpClientUtils.extractUserInfo;
+import static org.springframework.cloud.netflix.eureka.http.EurekaHttpClientUtils.mappingJacksonHttpMessageConverter;
+
+/**
+ * Provides the custom {@link RestClient} required by the
+ * {@link RestClientEurekaHttpClient}. Relies on Jackson for serialization and
+ * deserialization.
+ *
+ * @author Wonchul Heo
+ * @author Olga Maciaszek-Sharma
+ * @since 4.2.0
+ */
+public class RestClientTransportClientFactory implements TransportClientFactory {
+
+	private final Optional<SSLContext> sslContext;
+
+	private final Optional<HostnameVerifier> hostnameVerifier;
+
+	private final EurekaClientHttpRequestFactorySupplier eurekaClientHttpRequestFactorySupplier;
+
+	private final Supplier<RestClient.Builder> builderSupplier;
+
+	public RestClientTransportClientFactory(Optional<SSLContext> sslContext,
+			Optional<HostnameVerifier> hostnameVerifier,
+			EurekaClientHttpRequestFactorySupplier eurekaClientHttpRequestFactorySupplier,
+			Supplier<RestClient.Builder> builderSupplier) {
+		this.sslContext = sslContext;
+		this.hostnameVerifier = hostnameVerifier;
+		this.eurekaClientHttpRequestFactorySupplier = eurekaClientHttpRequestFactorySupplier;
+		this.builderSupplier = builderSupplier;
+	}
+
+	public RestClientTransportClientFactory(TlsProperties tlsProperties,
+			EurekaClientHttpRequestFactorySupplier eurekaClientHttpRequestFactorySupplier,
+			Supplier<RestClient.Builder> builderSupplier) {
+		this(context(tlsProperties), Optional.empty(), eurekaClientHttpRequestFactorySupplier, builderSupplier);
+	}
+
+	public RestClientTransportClientFactory(TlsProperties tlsProperties,
+			EurekaClientHttpRequestFactorySupplier eurekaClientHttpRequestFactorySupplier) {
+		this(tlsProperties, eurekaClientHttpRequestFactorySupplier, RestClient::builder);
+	}
+
+	@Override
+	public EurekaHttpClient newClient(EurekaEndpoint endpoint) {
+		// we want a copy to modify. Don't change the original
+		final RestClient.Builder builder = builderSupplier.get().clone();
+
+		ClientHttpRequestFactory requestFactory = this.eurekaClientHttpRequestFactorySupplier
+			.get(this.sslContext.orElse(null), this.hostnameVerifier.orElse(null));
+
+		builder.requestFactory(requestFactory);
+		setUrl(builder, endpoint.getServiceUrl());
+		builder.messageConverters(converters -> converters.add(0, mappingJacksonHttpMessageConverter()));
+
+		builder.defaultStatusHandler(HttpStatusCode::isError, (req, res) -> {
+		});
+
+		builder.requestInterceptor((request, body, execution) -> {
+			final ClientHttpResponse response = execution.execute(request, body);
+			if (!response.getStatusCode().equals(HttpStatus.NOT_FOUND)) {
+				return response;
+			}
+			return new NotFoundHttpResponse(response);
+		});
+
+		return new RestClientEurekaHttpClient(builder.build());
+	}
+
+	@Override
+	public void shutdown() {
+	}
+
+	private static void setUrl(RestClient.Builder builder, String serviceUrl) {
+		final String url = UriComponentsBuilder.fromUriString(serviceUrl).userInfo(null).toUriString();
+
+		final EurekaHttpClientUtils.UserInfo userInfo = extractUserInfo(serviceUrl);
+		if (userInfo != null) {
+			builder.requestInterceptor(new BasicAuthenticationInterceptor(userInfo.username(), userInfo.password()));
+		}
+		builder.baseUrl(url);
+	}
+
+}

spring-cloud-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/http/RestTemplateDiscoveryClientOptionalArgs.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2022 the original author or authors.
+ * Copyright 2017-present 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.
@@ -16,18 +16,37 @@
 
 package org.springframework.cloud.netflix.eureka.http;
 
+import java.util.function.Supplier;
+
 import com.netflix.discovery.AbstractDiscoveryClientOptionalArgs;
 
+import org.springframework.boot.web.client.RestTemplateBuilder;
+import org.springframework.web.client.RestClient;
+import org.springframework.web.client.RestTemplate;
+
 /**
  * @author Daniel Lavoie
+ * @author Armin Krezovic
+ * @deprecated {@link RestTemplate}-based implementation to be removed in favour of
+ * {@link RestClient}-based implementation.
  */
+@Deprecated
 public class RestTemplateDiscoveryClientOptionalArgs extends AbstractDiscoveryClientOptionalArgs<Void> {
 
 	protected final EurekaClientHttpRequestFactorySupplier eurekaClientHttpRequestFactorySupplier;
 
+	protected final Supplier<RestTemplateBuilder> restTemplateBuilderSupplier;
+
 	public RestTemplateDiscoveryClientOptionalArgs(
 			EurekaClientHttpRequestFactorySupplier eurekaClientHttpRequestFactorySupplier) {
+		this(eurekaClientHttpRequestFactorySupplier, RestTemplateBuilder::new);
+	}
+
+	public RestTemplateDiscoveryClientOptionalArgs(
+			EurekaClientHttpRequestFactorySupplier eurekaClientHttpRequestFactorySupplier,
+			Supplier<RestTemplateBuilder> restTemplateBuilderSupplier) {
 		this.eurekaClientHttpRequestFactorySupplier = eurekaClientHttpRequestFactorySupplier;
+		this.restTemplateBuilderSupplier = restTemplateBuilderSupplier;
 	}
 
 }

spring-cloud-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/http/RestTemplateEurekaHttpClient.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2022 the original author or authors.
+ * Copyright 2017-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,6 +16,7 @@
 
 package org.springframework.cloud.netflix.eureka.http;
 
+import java.net.URI;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
@@ -30,8 +31,6 @@ import com.netflix.discovery.shared.transport.EurekaHttpClient;
 import com.netflix.discovery.shared.transport.EurekaHttpResponse;
 import com.netflix.discovery.shared.transport.EurekaHttpResponse.EurekaHttpResponseBuilder;
 import com.netflix.discovery.util.StringUtil;
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
 
 import org.springframework.http.HttpEntity;
 import org.springframework.http.HttpHeaders;
@@ -39,17 +38,21 @@ import org.springframework.http.HttpMethod;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.MediaType;
 import org.springframework.http.ResponseEntity;
+import org.springframework.web.client.RestClient;
 import org.springframework.web.client.RestTemplate;
+import org.springframework.web.util.UriComponentsBuilder;
 
 import static com.netflix.discovery.shared.transport.EurekaHttpResponse.anEurekaHttpResponse;
 
 /**
  * @author Daniel Lavoie
+ * @author Václav Plic
+ * @deprecated {@link RestTemplate}-based implementation to be removed in favour of
+ * {@link RestClient}-based implementation.
  */
+@Deprecated(forRemoval = true)
 public class RestTemplateEurekaHttpClient implements EurekaHttpClient {
 
-	protected final Log logger = LogFactory.getLog(getClass());
-
 	private final RestTemplate restTemplate;
 
 	private String serviceUrl;
@@ -72,13 +75,16 @@ public class RestTemplateEurekaHttpClient implements EurekaHttpClient {
 
 	@Override
 	public EurekaHttpResponse<Void> register(InstanceInfo info) {
-		String urlPath = serviceUrl + "apps/" + info.getAppName();
+		URI uri = UriComponentsBuilder.fromHttpUrl(serviceUrl)
+			.path("apps/{appName}")
+			.buildAndExpand(info.getAppName())
+			.toUri();
 
 		HttpHeaders headers = new HttpHeaders();
 		headers.add(HttpHeaders.ACCEPT_ENCODING, "gzip");
 		headers.add(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE);
 
-		ResponseEntity<Void> response = restTemplate.exchange(urlPath, HttpMethod.POST, new HttpEntity<>(info, headers),
+		ResponseEntity<Void> response = restTemplate.exchange(uri, HttpMethod.POST, new HttpEntity<>(info, headers),
 				Void.class);
 
 		return anEurekaHttpResponse(response.getStatusCode().value()).headers(headersOf(response)).build();
@@ -86,9 +92,12 @@ public class RestTemplateEurekaHttpClient implements EurekaHttpClient {
 
 	@Override
 	public EurekaHttpResponse<Void> cancel(String appName, String id) {
-		String urlPath = serviceUrl + "apps/" + appName + '/' + id;
+		URI uri = UriComponentsBuilder.fromHttpUrl(serviceUrl)
+			.path("apps/{appName}/{id}")
+			.buildAndExpand(appName, id)
+			.toUri();
 
-		ResponseEntity<Void> response = restTemplate.exchange(urlPath, HttpMethod.DELETE, null, Void.class);
+		ResponseEntity<Void> response = restTemplate.exchange(uri, HttpMethod.DELETE, null, Void.class);
 
 		return anEurekaHttpResponse(response.getStatusCode().value()).headers(headersOf(response)).build();
 	}
@@ -96,15 +105,22 @@ public class RestTemplateEurekaHttpClient implements EurekaHttpClient {
 	@Override
 	public EurekaHttpResponse<InstanceInfo> sendHeartBeat(String appName, String id, InstanceInfo info,
 			InstanceStatus overriddenStatus) {
-		String urlPath = serviceUrl + "apps/" + appName + '/' + id + "?status=" + info.getStatus().toString()
-				+ "&lastDirtyTimestamp=" + info.getLastDirtyTimestamp().toString()
-				+ (overriddenStatus != null ? "&overriddenstatus=" + overriddenStatus.name() : "");
+		UriComponentsBuilder uriBuilder = UriComponentsBuilder.fromHttpUrl(serviceUrl)
+			.path("apps/{appName}/{id}")
+			.queryParam("status", info.getStatus().toString())
+			.queryParam("lastDirtyTimestamp", info.getLastDirtyTimestamp().toString());
 
-		ResponseEntity<InstanceInfo> response = restTemplate.exchange(urlPath, HttpMethod.PUT, null,
-				InstanceInfo.class);
+		if (overriddenStatus != null) {
+			uriBuilder = uriBuilder.queryParam("overriddenstatus", overriddenStatus.name());
+		}
+
+		URI uri = uriBuilder.buildAndExpand(appName, id).toUri();
+
+		ResponseEntity<InstanceInfo> response = restTemplate.exchange(uri, HttpMethod.PUT, null, InstanceInfo.class);
 
 		EurekaHttpResponseBuilder<InstanceInfo> eurekaResponseBuilder = anEurekaHttpResponse(
-				response.getStatusCode().value(), InstanceInfo.class).headers(headersOf(response));
+				response.getStatusCode().value(), InstanceInfo.class)
+			.headers(headersOf(response));
 
 		if (response.hasBody()) {
 			eurekaResponseBuilder.entity(response.getBody());
@@ -116,20 +132,27 @@ public class RestTemplateEurekaHttpClient implements EurekaHttpClient {
 	@Override
 	public EurekaHttpResponse<Void> statusUpdate(String appName, String id, InstanceStatus newStatus,
 			InstanceInfo info) {
-		String urlPath = serviceUrl + "apps/" + appName + '/' + id + "/status?value=" + newStatus.name()
-				+ "&lastDirtyTimestamp=" + info.getLastDirtyTimestamp().toString();
+		URI uri = UriComponentsBuilder.fromHttpUrl(serviceUrl)
+			.path("apps/{appName}/{id}/status")
+			.queryParam("value", newStatus.name())
+			.queryParam("lastDirtyTimestamp", info.getLastDirtyTimestamp().toString())
+			.buildAndExpand(appName, id)
+			.toUri();
 
-		ResponseEntity<Void> response = restTemplate.exchange(urlPath, HttpMethod.PUT, null, Void.class);
+		ResponseEntity<Void> response = restTemplate.exchange(uri, HttpMethod.PUT, null, Void.class);
 
 		return anEurekaHttpResponse(response.getStatusCode().value()).headers(headersOf(response)).build();
 	}
 
 	@Override
 	public EurekaHttpResponse<Void> deleteStatusOverride(String appName, String id, InstanceInfo info) {
-		String urlPath = serviceUrl + "apps/" + appName + '/' + id + "/status?lastDirtyTimestamp="
-				+ info.getLastDirtyTimestamp().toString();
+		URI uri = UriComponentsBuilder.fromHttpUrl(serviceUrl)
+			.path("apps/{appName}/{id}/status")
+			.queryParam("lastDirtyTimestamp", info.getLastDirtyTimestamp().toString())
+			.buildAndExpand(appName, id)
+			.toUri();
 
-		ResponseEntity<Void> response = restTemplate.exchange(urlPath, HttpMethod.DELETE, null, Void.class);
+		ResponseEntity<Void> response = restTemplate.exchange(uri, HttpMethod.DELETE, null, Void.class);
 
 		return anEurekaHttpResponse(response.getStatusCode().value()).headers(headersOf(response)).build();
 	}
@@ -140,18 +163,22 @@ public class RestTemplateEurekaHttpClient implements EurekaHttpClient {
 	}
 
 	private EurekaHttpResponse<Applications> getApplicationsInternal(String urlPath, String[] regions) {
-		String url = serviceUrl + urlPath;
+		UriComponentsBuilder uriBuilder = UriComponentsBuilder.fromHttpUrl(serviceUrl).path(urlPath);
 
 		if (regions != null && regions.length > 0) {
-			url = url + (urlPath.contains("?") ? "&" : "?") + "regions=" + StringUtil.join(regions);
+			uriBuilder = uriBuilder.queryParam("regions", StringUtil.join(regions));
 		}
 
-		ResponseEntity<EurekaApplications> response = restTemplate.exchange(url, HttpMethod.GET, null,
+		URI uri = uriBuilder.build().toUri();
+
+		ResponseEntity<EurekaApplications> response = restTemplate.exchange(uri, HttpMethod.GET, null,
 				EurekaApplications.class);
 
 		return anEurekaHttpResponse(response.getStatusCode().value(),
 				response.getStatusCode().value() == HttpStatus.OK.value() && response.hasBody()
-						? (Applications) response.getBody() : null).headers(headersOf(response)).build();
+						? (Applications) response.getBody() : null)
+			.headers(headersOf(response))
+			.build();
 	}
 
 	@Override
@@ -171,9 +198,9 @@ public class RestTemplateEurekaHttpClient implements EurekaHttpClient {
 
 	@Override
 	public EurekaHttpResponse<Application> getApplication(String appName) {
-		String urlPath = serviceUrl + "apps/" + appName;
+		URI uri = UriComponentsBuilder.fromHttpUrl(serviceUrl).path("apps/{appName}").buildAndExpand(appName).toUri();
 
-		ResponseEntity<Application> response = restTemplate.exchange(urlPath, HttpMethod.GET, null, Application.class);
+		ResponseEntity<Application> response = restTemplate.exchange(uri, HttpMethod.GET, null, Application.class);
 
 		Application application = response.getStatusCode().value() == HttpStatus.OK.value() && response.hasBody()
 				? response.getBody() : null;
@@ -183,23 +210,24 @@ public class RestTemplateEurekaHttpClient implements EurekaHttpClient {
 
 	@Override
 	public EurekaHttpResponse<InstanceInfo> getInstance(String appName, String id) {
-		return getInstanceInternal("apps/" + appName + '/' + id);
+		return getInstanceInternal("apps", appName, id);
 	}
 
 	@Override
 	public EurekaHttpResponse<InstanceInfo> getInstance(String id) {
-		return getInstanceInternal("instances/" + id);
+		return getInstanceInternal("instances", id);
 	}
 
-	private EurekaHttpResponse<InstanceInfo> getInstanceInternal(String urlPath) {
-		urlPath = serviceUrl + urlPath;
+	private EurekaHttpResponse<InstanceInfo> getInstanceInternal(String... pathSegments) {
+		URI uri = UriComponentsBuilder.fromHttpUrl(serviceUrl).pathSegment(pathSegments).build().toUri();
 
-		ResponseEntity<InstanceInfo> response = restTemplate.exchange(urlPath, HttpMethod.GET, null,
-				InstanceInfo.class);
+		ResponseEntity<InstanceInfo> response = restTemplate.exchange(uri, HttpMethod.GET, null, InstanceInfo.class);
 
 		return anEurekaHttpResponse(response.getStatusCode().value(),
 				response.getStatusCode().value() == HttpStatus.OK.value() && response.hasBody() ? response.getBody()
-						: null).headers(headersOf(response)).build();
+						: null)
+			.headers(headersOf(response))
+			.build();
 	}
 
 	@Override

spring-cloud-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/http/RestTemplateTransportClientFactories.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2022 the original author or authors.
+ * Copyright 2017-present 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.
@@ -27,9 +27,16 @@ import com.netflix.discovery.EurekaClientConfig;
 import com.netflix.discovery.shared.transport.TransportClientFactory;
 import com.netflix.discovery.shared.transport.jersey.TransportClientFactories;
 
+import org.springframework.web.client.RestClient;
+import org.springframework.web.client.RestTemplate;
+
 /**
  * @author Daniel Lavoie
+ * @author Armin Krezovic
+ * @deprecated {@link RestTemplate}-based implementation to be removed in favour of
+ * {@link RestClient}-based implementation.
  */
+@Deprecated(forRemoval = true)
 public class RestTemplateTransportClientFactories implements TransportClientFactories<Void> {
 
 	private final RestTemplateDiscoveryClientOptionalArgs args;
@@ -41,16 +48,16 @@ public class RestTemplateTransportClientFactories implements TransportClientFact
 	@Override
 	public TransportClientFactory newTransportClientFactory(EurekaClientConfig clientConfig,
 			Collection<Void> additionalFilters, InstanceInfo myInstanceInfo) {
-		return new RestTemplateTransportClientFactory(this.args.getSSLContext(), this.args.getHostnameVerifier(),
-				this.args.eurekaClientHttpRequestFactorySupplier);
+		return new RestTemplateTransportClientFactory(args.getSSLContext(), args.getHostnameVerifier(),
+				args.eurekaClientHttpRequestFactorySupplier, args.restTemplateBuilderSupplier);
 	}
 
 	@Override
 	public TransportClientFactory newTransportClientFactory(final EurekaClientConfig clientConfig,
 			final Collection<Void> additionalFilters, final InstanceInfo myInstanceInfo,
 			final Optional<SSLContext> sslContext, final Optional<HostnameVerifier> hostnameVerifier) {
-		return new RestTemplateTransportClientFactory(this.args.getSSLContext(), this.args.getHostnameVerifier(),
-				this.args.eurekaClientHttpRequestFactorySupplier);
+		return new RestTemplateTransportClientFactory(args.getSSLContext(), args.getHostnameVerifier(),
+				args.eurekaClientHttpRequestFactorySupplier, args.restTemplateBuilderSupplier);
 	}
 
 }

spring-cloud-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/http/RestTemplateTransportClientFactory.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2022 the original author or authors.
+ * Copyright 2017-present 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.
@@ -16,54 +16,45 @@
 
 package org.springframework.cloud.netflix.eureka.http;
 
-import java.io.IOException;
-import java.io.InputStream;
-import java.net.URI;
-import java.net.URISyntaxException;
 import java.util.Optional;
+import java.util.function.Supplier;
 
 import javax.net.ssl.HostnameVerifier;
 import javax.net.ssl.SSLContext;
 
-import com.fasterxml.jackson.databind.BeanDescription;
-import com.fasterxml.jackson.databind.DeserializationFeature;
-import com.fasterxml.jackson.databind.JsonSerializer;
-import com.fasterxml.jackson.databind.ObjectMapper;
-import com.fasterxml.jackson.databind.PropertyNamingStrategies;
-import com.fasterxml.jackson.databind.SerializationConfig;
-import com.fasterxml.jackson.databind.SerializationFeature;
-import com.fasterxml.jackson.databind.module.SimpleModule;
-import com.fasterxml.jackson.databind.ser.BeanSerializerModifier;
-import com.fasterxml.jackson.databind.ser.std.BeanSerializerBase;
-import com.netflix.appinfo.InstanceInfo;
-import com.netflix.discovery.converters.jackson.mixin.ApplicationsJsonMixIn;
-import com.netflix.discovery.converters.jackson.mixin.InstanceInfoJsonMixIn;
-import com.netflix.discovery.converters.jackson.serializer.InstanceInfoJsonBeanSerializer;
-import com.netflix.discovery.shared.Applications;
 import com.netflix.discovery.shared.resolver.EurekaEndpoint;
 import com.netflix.discovery.shared.transport.EurekaHttpClient;
 import com.netflix.discovery.shared.transport.TransportClientFactory;
 
-import org.springframework.cloud.configuration.SSLContextFactory;
+import org.springframework.boot.web.client.RestTemplateBuilder;
 import org.springframework.cloud.configuration.TlsProperties;
-import org.springframework.http.HttpHeaders;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.HttpStatusCode;
 import org.springframework.http.client.ClientHttpRequestFactory;
 import org.springframework.http.client.ClientHttpResponse;
 import org.springframework.http.client.support.BasicAuthenticationInterceptor;
-import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
 import org.springframework.web.client.DefaultResponseErrorHandler;
+import org.springframework.web.client.RestClient;
 import org.springframework.web.client.RestTemplate;
 import org.springframework.web.util.UriComponentsBuilder;
 
+import static org.springframework.cloud.netflix.eureka.http.EurekaHttpClientUtils.context;
+import static org.springframework.cloud.netflix.eureka.http.EurekaHttpClientUtils.extractUserInfo;
+import static org.springframework.cloud.netflix.eureka.http.EurekaHttpClientUtils.mappingJacksonHttpMessageConverter;
+
 /**
  * Provides the custom {@link RestTemplate} required by the
  * {@link RestTemplateEurekaHttpClient}. Relies on Jackson for serialization and
  * deserialization.
  *
  * @author Daniel Lavoie
+ * @author Armin Krezovic
+ * @author Wonchul Heo
+ * @author Olga Maciaszek-Sharma
+ * @deprecated {@link RestTemplate}-based implementation to be removed in favour of
+ * {@link RestClient}-based implementation.
  */
+@Deprecated(forRemoval = true)
 public class RestTemplateTransportClientFactory implements TransportClientFactory {
 
 	private final Optional<SSLContext> sslContext;
@@ -72,37 +63,44 @@ public class RestTemplateTransportClientFactory implements TransportClientFactor
 
 	private final EurekaClientHttpRequestFactorySupplier eurekaClientHttpRequestFactorySupplier;
 
-	public RestTemplateTransportClientFactory(TlsProperties tlsProperties,
-			EurekaClientHttpRequestFactorySupplier eurekaClientHttpRequestFactorySupplier) {
-		this.sslContext = context(tlsProperties);
-		this.hostnameVerifier = Optional.empty();
+	private final Supplier<RestTemplateBuilder> restTemplateBuilderSupplier;
+
+	public RestTemplateTransportClientFactory(Optional<SSLContext> sslContext,
+			Optional<HostnameVerifier> hostnameVerifier,
+			EurekaClientHttpRequestFactorySupplier eurekaClientHttpRequestFactorySupplier,
+			Supplier<RestTemplateBuilder> restTemplateBuilderSupplier) {
+		this.sslContext = sslContext;
+		this.hostnameVerifier = hostnameVerifier;
 		this.eurekaClientHttpRequestFactorySupplier = eurekaClientHttpRequestFactorySupplier;
+		this.restTemplateBuilderSupplier = restTemplateBuilderSupplier;
 	}
 
-	private Optional<SSLContext> context(TlsProperties properties) {
-		if (properties == null || !properties.isEnabled()) {
-			return Optional.empty();
-		}
-		try {
-			return Optional.of(new SSLContextFactory(properties).createSSLContext());
-		}
-		catch (Exception e) {
-			throw new IllegalStateException(e);
-		}
+	public RestTemplateTransportClientFactory(TlsProperties tlsProperties,
+			EurekaClientHttpRequestFactorySupplier eurekaClientHttpRequestFactorySupplier,
+			Supplier<RestTemplateBuilder> restTemplateBuilderSupplier) {
+		this(context(tlsProperties), Optional.empty(), eurekaClientHttpRequestFactorySupplier,
+				restTemplateBuilderSupplier);
+	}
+
+	public RestTemplateTransportClientFactory(TlsProperties tlsProperties,
+			EurekaClientHttpRequestFactorySupplier eurekaClientHttpRequestFactorySupplier) {
+		this(tlsProperties, eurekaClientHttpRequestFactorySupplier, RestTemplateBuilder::new);
 	}
 
 	public RestTemplateTransportClientFactory(Optional<SSLContext> sslContext,
 			Optional<HostnameVerifier> hostnameVerifier,
 			EurekaClientHttpRequestFactorySupplier eurekaClientHttpRequestFactorySupplier) {
-		this.sslContext = sslContext;
-		this.hostnameVerifier = hostnameVerifier;
-		this.eurekaClientHttpRequestFactorySupplier = eurekaClientHttpRequestFactorySupplier;
+
+		this(sslContext, hostnameVerifier, eurekaClientHttpRequestFactorySupplier, RestTemplateBuilder::new);
 	}
 
+	// Visible for testing
+	/**
+	 * @deprecated pass the default values while initialising object in test classes.
+	 */
+	@Deprecated(forRemoval = true)
 	public RestTemplateTransportClientFactory() {
-		this.sslContext = Optional.empty();
-		this.hostnameVerifier = Optional.empty();
-		this.eurekaClientHttpRequestFactorySupplier = new DefaultEurekaClientHttpRequestFactorySupplier();
+		this(Optional.empty(), Optional.empty(), new DefaultEurekaClientHttpRequestFactorySupplier());
 	}
 
 	@Override
@@ -119,21 +117,25 @@ public class RestTemplateTransportClientFactory implements TransportClientFactor
 
 	private RestTemplate restTemplate(String serviceUrl) {
 		ClientHttpRequestFactory requestFactory = this.eurekaClientHttpRequestFactorySupplier
-				.get(this.sslContext.orElse(null), this.hostnameVerifier.orElse(null));
-		RestTemplate restTemplate = new RestTemplate(requestFactory);
+			.get(this.sslContext.orElse(null), this.hostnameVerifier.orElse(null));
 
-		try {
-			URI serviceURI = new URI(serviceUrl);
-			if (serviceURI.getUserInfo() != null) {
-				String[] credentials = serviceURI.getUserInfo().split(":");
-				if (credentials.length == 2) {
-					restTemplate.getInterceptors()
-							.add(new BasicAuthenticationInterceptor(credentials[0], credentials[1]));
-				}
-			}
+		RestTemplate restTemplate;
+
+		if (restTemplateBuilderSupplier != null && restTemplateBuilderSupplier.get() != null) {
+			// Avoid using RestTemplateBuilder.requestFactory(() -> requestFactory)
+			// when we have a concrete type, the reflective builder can throw errors if
+			// there is custom configuration (ie Redirects.DONT_FOLLOW) gh-4423
+			restTemplate = restTemplateBuilderSupplier.get().build();
+			restTemplate.setRequestFactory(requestFactory);
+		}
+		else {
+			restTemplate = new RestTemplate(requestFactory);
 		}
-		catch (URISyntaxException ignore) {
 
+		final EurekaHttpClientUtils.UserInfo userInfo = extractUserInfo(serviceUrl);
+		if (userInfo != null) {
+			restTemplate.getInterceptors()
+				.add(new BasicAuthenticationInterceptor(userInfo.username(), userInfo.password()));
 		}
 
 		restTemplate.getMessageConverters().add(0, mappingJacksonHttpMessageConverter());
@@ -150,102 +152,19 @@ public class RestTemplateTransportClientFactory implements TransportClientFactor
 		return restTemplate;
 	}
 
-	/**
-	 * Provides the serialization configurations required by the Eureka Server. JSON
-	 * content exchanged with eureka requires a root node matching the entity being
-	 * serialized or deserialized. Achived with
-	 * {@link SerializationFeature#WRAP_ROOT_VALUE} and
-	 * {@link DeserializationFeature#UNWRAP_ROOT_VALUE}.
-	 * {@link PropertyNamingStrategies.SnakeCaseStrategy} is applied to the underlying
-	 * {@link ObjectMapper}.
-	 * @return a {@link MappingJackson2HttpMessageConverter} object
-	 */
-	public MappingJackson2HttpMessageConverter mappingJacksonHttpMessageConverter() {
-		MappingJackson2HttpMessageConverter converter = new MappingJackson2HttpMessageConverter();
-		converter.setObjectMapper(new ObjectMapper().setPropertyNamingStrategy(PropertyNamingStrategies.SNAKE_CASE));
-
-		SimpleModule jsonModule = new SimpleModule();
-		jsonModule.setSerializerModifier(createJsonSerializerModifier());
-		converter.getObjectMapper().registerModule(jsonModule);
-
-		converter.getObjectMapper().configure(SerializationFeature.WRAP_ROOT_VALUE, true);
-		converter.getObjectMapper().configure(DeserializationFeature.UNWRAP_ROOT_VALUE, true);
-		converter.getObjectMapper().addMixIn(Applications.class, ApplicationsJsonMixIn.class);
-		converter.getObjectMapper().addMixIn(InstanceInfo.class, InstanceInfoJsonMixIn.class);
-
-		return converter;
-	}
-
-	public static BeanSerializerModifier createJsonSerializerModifier() {
-		return new BeanSerializerModifier() {
-			@Override
-			public JsonSerializer<?> modifySerializer(SerializationConfig config, BeanDescription beanDesc,
-					JsonSerializer<?> serializer) {
-				if (beanDesc.getBeanClass().isAssignableFrom(InstanceInfo.class)) {
-					return new InstanceInfoJsonBeanSerializer((BeanSerializerBase) serializer, false);
-				}
-				return serializer;
-			}
-		};
-	}
-
 	@Override
 	public void shutdown() {
 	}
 
-	/**
-	 * Response that ignores body, specifically for 404 errors.
-	 */
-	private static class NotFoundHttpResponse implements ClientHttpResponse {
-
-		private final ClientHttpResponse response;
-
-		NotFoundHttpResponse(ClientHttpResponse response) {
-			this.response = response;
-		}
-
-		@Override
-		public HttpStatusCode getStatusCode() throws IOException {
-			return response.getStatusCode();
-		}
-
-		@Override
-		public int getRawStatusCode() throws IOException {
-			return response.getRawStatusCode();
-		}
-
-		@Override
-		public String getStatusText() throws IOException {
-			return response.getStatusText();
-		}
-
-		@Override
-		public void close() {
-			response.close();
-		}
-
-		@Override
-		public InputStream getBody() throws IOException {
-			// ignore body on 404 for heartbeat, see gh-4145
-			return null;
-		}
-
-		@Override
-		public HttpHeaders getHeaders() {
-			return response.getHeaders();
-		}
-
-	}
-
 	class ErrorHandler extends DefaultResponseErrorHandler {
 
 		@Override
 		protected boolean hasError(HttpStatusCode statusCode) {
 			/**
-			 * When the Eureka server restarts and a client tries to sent a heartbeat the
-			 * server will respond with a 404. By default RestTemplate will throw an
+			 * When the Eureka server restarts and a client tries to send a heartbeat the
+			 * server will respond with a 404. By default, RestTemplate will throw an
 			 * exception in this case. What we want is to return the 404 to the upstream
-			 * code so it will send another registration request to the server.
+			 * code, so it will send another registration request to the server.
 			 */
 			if (statusCode.is4xxClientError()) {
 				return false;

spring-cloud-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/http/WebClientDiscoveryClientOptionalArgs.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2022 the original author or authors.
+ * Copyright 2017-present 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-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/http/WebClientEurekaHttpClient.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2022 the original author or authors.
+ * Copyright 2017-present 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.netflix.eureka.http;
 
 import java.util.Map;
+import java.util.Optional;
 
 import com.netflix.appinfo.InstanceInfo;
 import com.netflix.appinfo.InstanceInfo.InstanceStatus;
@@ -42,6 +43,7 @@ import static com.netflix.discovery.shared.transport.EurekaHttpResponse.anEureka
 /**
  * @author Daniel Lavoie
  * @author Haytham Mohamed
+ * @author Václav Plic
  */
 public class WebClientEurekaHttpClient implements EurekaHttpClient {
 
@@ -53,34 +55,48 @@ public class WebClientEurekaHttpClient implements EurekaHttpClient {
 
 	@Override
 	public EurekaHttpResponse<Void> register(InstanceInfo info) {
-		return webClient.post().uri("apps/" + info.getAppName()).body(BodyInserters.fromValue(info))
-				.header(HttpHeaders.ACCEPT_ENCODING, "gzip")
-				.header(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE).retrieve()
-				.onStatus(HttpStatusCode::isError, this::ignoreError).toBodilessEntity().map(this::eurekaHttpResponse)
-				.block();
+		return webClient.post()
+			.uri(uriBuilder -> uriBuilder.path("apps/{appName}").build(info.getAppName()))
+			.body(BodyInserters.fromValue(info))
+			.header(HttpHeaders.ACCEPT_ENCODING, "gzip")
+			.header(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE)
+			.retrieve()
+			.onStatus(HttpStatusCode::isError, this::ignoreError)
+			.toBodilessEntity()
+			.map(this::eurekaHttpResponse)
+			.block();
 	}
 
 	@Override
 	public EurekaHttpResponse<Void> cancel(String appName, String id) {
-		return webClient.delete().uri("apps/" + appName + '/' + id).retrieve()
-				.onStatus(HttpStatusCode::isError, this::ignoreError).toBodilessEntity().map(this::eurekaHttpResponse)
-				.block();
+		return webClient.delete()
+			.uri(uriBuilder -> uriBuilder.path("apps/{appName}/{id}").build(appName, id))
+			.retrieve()
+			.onStatus(HttpStatusCode::isError, this::ignoreError)
+			.toBodilessEntity()
+			.map(this::eurekaHttpResponse)
+			.block();
 	}
 
 	@Override
 	public EurekaHttpResponse<InstanceInfo> sendHeartBeat(String appName, String id, InstanceInfo info,
 			InstanceStatus overriddenStatus) {
-		String urlPath = "apps/" + appName + '/' + id + "?status=" + info.getStatus().toString()
-				+ "&lastDirtyTimestamp=" + info.getLastDirtyTimestamp().toString()
-				+ (overriddenStatus != null ? "&overriddenstatus=" + overriddenStatus.name() : "");
 
-		ResponseEntity<InstanceInfo> response = webClient.put().uri(urlPath)
-				.header(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE)
-				.header(HttpHeaders.ACCEPT, MediaType.APPLICATION_JSON_VALUE).retrieve()
-				.onStatus(HttpStatusCode::isError, this::ignoreError).toEntity(InstanceInfo.class).block();
+		ResponseEntity<InstanceInfo> response = webClient.put()
+			.uri(uriBuilder -> uriBuilder.path("apps/{appName}/{id}")
+				.queryParam("status", info.getStatus().toString())
+				.queryParam("lastDirtyTimestamp", info.getLastDirtyTimestamp().toString())
+				.build(appName, id))
+			.header(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE)
+			.header(HttpHeaders.ACCEPT, MediaType.APPLICATION_JSON_VALUE)
+			.retrieve()
+			.onStatus(HttpStatusCode::isError, this::ignoreError)
+			.toEntity(InstanceInfo.class)
+			.block();
 
 		EurekaHttpResponseBuilder<InstanceInfo> builder = anEurekaHttpResponse(statusCodeValueOf(response),
-				InstanceInfo.class).headers(headersOf(response));
+				InstanceInfo.class)
+			.headers(headersOf(response));
 
 		InstanceInfo entity = response.getBody();
 
@@ -95,22 +111,31 @@ public class WebClientEurekaHttpClient implements EurekaHttpClient {
 	@Override
 	public EurekaHttpResponse<Void> statusUpdate(String appName, String id, InstanceStatus newStatus,
 			InstanceInfo info) {
-		String urlPath = "apps/" + appName + '/' + id + "/status?value=" + newStatus.name() + "&lastDirtyTimestamp="
-				+ info.getLastDirtyTimestamp().toString();
-
-		return webClient.put().uri(urlPath).header(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE)
-				.retrieve().onStatus(HttpStatusCode::isError, this::ignoreError).toBodilessEntity()
-				.map(this::eurekaHttpResponse).block();
+		return webClient.put()
+			.uri(uriBuilder -> uriBuilder.path("apps/{appName}/{id}/status")
+				.queryParam("value", newStatus.name())
+				.queryParam("lastDirtyTimestamp", info.getLastDirtyTimestamp().toString())
+				.build(appName, id))
+			.header(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE)
+			.retrieve()
+			.onStatus(HttpStatusCode::isError, this::ignoreError)
+			.toBodilessEntity()
+			.map(this::eurekaHttpResponse)
+			.block();
 	}
 
 	@Override
 	public EurekaHttpResponse<Void> deleteStatusOverride(String appName, String id, InstanceInfo info) {
-		String urlPath = "apps/" + appName + '/' + id + "/status?lastDirtyTimestamp="
-				+ info.getLastDirtyTimestamp().toString();
-
-		return webClient.delete().uri(urlPath).header(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE)
-				.retrieve().onStatus(HttpStatusCode::isError, this::ignoreError).toBodilessEntity()
-				.map(this::eurekaHttpResponse).block();
+		return webClient.delete()
+			.uri(uriBuilder -> uriBuilder.path("apps/{appName}/{id}/status")
+				.queryParam("lastDirtyTimestamp", info.getLastDirtyTimestamp().toString())
+				.build(appName, id))
+			.header(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE)
+			.retrieve()
+			.onStatus(HttpStatusCode::isError, this::ignoreError)
+			.toBodilessEntity()
+			.map(this::eurekaHttpResponse)
+			.block();
 	}
 
 	@Override
@@ -119,23 +144,25 @@ public class WebClientEurekaHttpClient implements EurekaHttpClient {
 	}
 
 	private EurekaHttpResponse<Applications> getApplicationsInternal(String urlPath, String[] regions) {
-		String url = urlPath;
+		Optional<String> regionsParam = (regions != null && regions.length > 0) ? Optional.of(StringUtil.join(regions))
+				: Optional.empty();
 
-		if (regions != null && regions.length > 0) {
-			url = url + (urlPath.contains("?") ? "&" : "?") + "regions=" + StringUtil.join(regions);
-		}
-
-		ResponseEntity<Applications> response = webClient.get().uri(url)
-				.header(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE)
-				.header(HttpHeaders.ACCEPT, MediaType.APPLICATION_JSON_VALUE).retrieve()
-				.onStatus(HttpStatusCode::isError, this::ignoreError).toEntity(Applications.class).block();
+		ResponseEntity<Applications> response = webClient.get()
+			.uri(uriBuilder -> uriBuilder.path(urlPath).queryParamIfPresent("regions", regionsParam).build())
+			.header(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE)
+			.header(HttpHeaders.ACCEPT, MediaType.APPLICATION_JSON_VALUE)
+			.retrieve()
+			.onStatus(HttpStatusCode::isError, this::ignoreError)
+			.toEntity(Applications.class)
+			.block();
 
 		int statusCode = statusCodeValueOf(response);
 
 		Applications body = response.getBody();
 
 		return anEurekaHttpResponse(statusCode, statusCode == HttpStatus.OK.value() && body != null ? body : null)
-				.headers(headersOf(response)).build();
+			.headers(headersOf(response))
+			.build();
 	}
 
 	@Override
@@ -156,9 +183,13 @@ public class WebClientEurekaHttpClient implements EurekaHttpClient {
 	@Override
 	public EurekaHttpResponse<Application> getApplication(String appName) {
 
-		ResponseEntity<Application> response = webClient.get().uri("apps/" + appName)
-				.header(HttpHeaders.ACCEPT, MediaType.APPLICATION_JSON_VALUE).retrieve()
-				.onStatus(HttpStatusCode::isError, this::ignoreError).toEntity(Application.class).block();
+		ResponseEntity<Application> response = webClient.get()
+			.uri(uriBuilder -> uriBuilder.path("apps/{appName}").build(appName))
+			.header(HttpHeaders.ACCEPT, MediaType.APPLICATION_JSON_VALUE)
+			.retrieve()
+			.onStatus(HttpStatusCode::isError, this::ignoreError)
+			.toEntity(Application.class)
+			.block();
 
 		int statusCode = statusCodeValueOf(response);
 		Application body = response.getBody();
@@ -170,24 +201,29 @@ public class WebClientEurekaHttpClient implements EurekaHttpClient {
 
 	@Override
 	public EurekaHttpResponse<InstanceInfo> getInstance(String appName, String id) {
-		return getInstanceInternal("apps/" + appName + '/' + id);
+		return getInstanceInternal("apps", appName, id);
 	}
 
 	@Override
 	public EurekaHttpResponse<InstanceInfo> getInstance(String id) {
-		return getInstanceInternal("instances/" + id);
+		return getInstanceInternal("instances", id);
 	}
 
-	private EurekaHttpResponse<InstanceInfo> getInstanceInternal(String urlPath) {
-		ResponseEntity<InstanceInfo> response = webClient.get().uri(urlPath)
-				.header(HttpHeaders.ACCEPT, MediaType.APPLICATION_JSON_VALUE).retrieve()
-				.onStatus(HttpStatusCode::isError, this::ignoreError).toEntity(InstanceInfo.class).block();
+	private EurekaHttpResponse<InstanceInfo> getInstanceInternal(String... pathSegments) {
+		ResponseEntity<InstanceInfo> response = webClient.get()
+			.uri(uriBuilder -> uriBuilder.pathSegment(pathSegments).build())
+			.header(HttpHeaders.ACCEPT, MediaType.APPLICATION_JSON_VALUE)
+			.retrieve()
+			.onStatus(HttpStatusCode::isError, this::ignoreError)
+			.toEntity(InstanceInfo.class)
+			.block();
 
 		int statusCode = statusCodeValueOf(response);
 		InstanceInfo body = response.getBody();
 
 		return anEurekaHttpResponse(statusCode, statusCode == HttpStatus.OK.value() && body != null ? body : null)
-				.headers(headersOf(response)).build();
+			.headers(headersOf(response))
+			.build();
 	}
 
 	@Override

spring-cloud-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/http/WebClientTransportClientFactories.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2022 the original author or authors.
+ * Copyright 2017-present 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-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/http/WebClientTransportClientFactory.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2022 the original author or authors.
+ * Copyright 2017-present 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.
@@ -16,33 +16,21 @@
 
 package org.springframework.cloud.netflix.eureka.http;
 
-import java.net.URI;
-import java.net.URISyntaxException;
 import java.util.function.Supplier;
 
-import com.fasterxml.jackson.databind.BeanDescription;
-import com.fasterxml.jackson.databind.DeserializationFeature;
-import com.fasterxml.jackson.databind.JsonSerializer;
 import com.fasterxml.jackson.databind.ObjectMapper;
-import com.fasterxml.jackson.databind.PropertyNamingStrategies;
-import com.fasterxml.jackson.databind.SerializationConfig;
-import com.fasterxml.jackson.databind.SerializationFeature;
-import com.fasterxml.jackson.databind.module.SimpleModule;
-import com.fasterxml.jackson.databind.ser.BeanSerializerModifier;
-import com.fasterxml.jackson.databind.ser.std.BeanSerializerBase;
-import com.netflix.appinfo.InstanceInfo;
-import com.netflix.discovery.converters.jackson.mixin.ApplicationsJsonMixIn;
-import com.netflix.discovery.converters.jackson.mixin.InstanceInfoJsonMixIn;
-import com.netflix.discovery.converters.jackson.serializer.InstanceInfoJsonBeanSerializer;
-import com.netflix.discovery.shared.Applications;
 import com.netflix.discovery.shared.resolver.EurekaEndpoint;
 import com.netflix.discovery.shared.transport.EurekaHttpClient;
 import com.netflix.discovery.shared.transport.TransportClientFactory;
 import reactor.core.publisher.Flux;
 import reactor.core.publisher.Mono;
+import reactor.netty.http.client.HttpClient;
+import reactor.netty.resources.ConnectionProvider;
+import reactor.netty.resources.LoopResources;
 
 import org.springframework.http.HttpStatus;
 import org.springframework.http.MediaType;
+import org.springframework.http.client.reactive.ReactorClientHttpConnector;
 import org.springframework.http.codec.ClientCodecConfigurer;
 import org.springframework.http.codec.json.Jackson2JsonDecoder;
 import org.springframework.http.codec.json.Jackson2JsonEncoder;
@@ -50,6 +38,10 @@ import org.springframework.web.reactive.function.client.ClientResponse;
 import org.springframework.web.reactive.function.client.ExchangeFilterFunction;
 import org.springframework.web.reactive.function.client.ExchangeFilterFunctions;
 import org.springframework.web.reactive.function.client.WebClient;
+import org.springframework.web.util.UriComponentsBuilder;
+
+import static org.springframework.cloud.netflix.eureka.http.EurekaHttpClientUtils.extractUserInfo;
+import static org.springframework.cloud.netflix.eureka.http.EurekaHttpClientUtils.objectMapper;
 
 /**
  * Provides the custom {@link WebClient.Builder} required by the
@@ -58,13 +50,21 @@ import org.springframework.web.reactive.function.client.WebClient;
  *
  * @author Daniel Lavoie
  * @author Haytham Mohamed
+ * @author Armin Krezovic
+ * @author Wonchul Heo
  */
 public class WebClientTransportClientFactory implements TransportClientFactory {
 
 	private final Supplier<WebClient.Builder> builderSupplier;
 
+	private final ConnectionProvider connectionProvider;
+
+	private final LoopResources loopResources;
+
 	public WebClientTransportClientFactory(Supplier<WebClient.Builder> builderSupplier) {
 		this.builderSupplier = builderSupplier;
+		this.connectionProvider = ConnectionProvider.create("eureka-webclient");
+		this.loopResources = LoopResources.create("eureka-webclient");
 	}
 
 	@Override
@@ -74,39 +74,24 @@ public class WebClientTransportClientFactory implements TransportClientFactory {
 		setUrl(builder, endpoint.getServiceUrl());
 		setCodecs(builder);
 		builder.filter(http4XxErrorExchangeFilterFunction());
+		// Use dedicated Reactor Netty resources independent of the reactive web server
+		// to prevent RejectedExecutionException during graceful shutdown when the
+		// server's event loop terminates before DiscoveryClient deregisters.
+		builder.clientConnector(
+				new ReactorClientHttpConnector(HttpClient.create(this.connectionProvider).runOn(this.loopResources)));
 		return new WebClientEurekaHttpClient(builder.build());
 	}
 
 	private WebClient.Builder setUrl(WebClient.Builder builder, String serviceUrl) {
-		String url = serviceUrl;
-		try {
-			URI serviceURI = new URI(serviceUrl);
-			if (serviceURI.getUserInfo() != null) {
-				String[] credentials = serviceURI.getUserInfo().split(":");
-				if (credentials.length == 2) {
-					builder.filter(ExchangeFilterFunctions.basicAuthentication(credentials[0], credentials[1]));
-					url = serviceUrl.replace(credentials[0] + ":" + credentials[1] + "@", "");
-				}
-			}
-		}
-		catch (URISyntaxException ignore) {
+		String url = UriComponentsBuilder.fromUriString(serviceUrl).userInfo(null).toUriString();
+
+		final EurekaHttpClientUtils.UserInfo userInfo = extractUserInfo(serviceUrl);
+		if (userInfo != null) {
+			builder.filter(ExchangeFilterFunctions.basicAuthentication(userInfo.username(), userInfo.password()));
 		}
 		return builder.baseUrl(url);
 	}
 
-	private static BeanSerializerModifier createJsonSerializerModifier() {
-		return new BeanSerializerModifier() {
-			@Override
-			public JsonSerializer<?> modifySerializer(SerializationConfig config, BeanDescription beanDesc,
-					JsonSerializer<?> serializer) {
-				if (beanDesc.getBeanClass().isAssignableFrom(InstanceInfo.class)) {
-					return new InstanceInfoJsonBeanSerializer((BeanSerializerBase) serializer, false);
-				}
-				return serializer;
-			}
-		};
-	}
-
 	private void setCodecs(WebClient.Builder builder) {
 		ObjectMapper objectMapper = objectMapper();
 		builder.codecs(configurer -> {
@@ -117,32 +102,6 @@ public class WebClientTransportClientFactory implements TransportClientFactory {
 		});
 	}
 
-	/**
-	 * Provides the serialization configurations required by the Eureka Server. JSON
-	 * content exchanged with eureka requires a root node matching the entity being
-	 * serialized or deserialized. Achieved with
-	 * {@link SerializationFeature#WRAP_ROOT_VALUE} and
-	 * {@link DeserializationFeature#UNWRAP_ROOT_VALUE}.
-	 * {@link PropertyNamingStrategies.SnakeCaseStrategy} is applied to the underlying
-	 * {@link ObjectMapper}.
-	 * @return a {@link ObjectMapper} object
-	 */
-	private ObjectMapper objectMapper() {
-		ObjectMapper objectMapper = new ObjectMapper();
-		objectMapper.setPropertyNamingStrategy(PropertyNamingStrategies.SNAKE_CASE);
-
-		SimpleModule jsonModule = new SimpleModule();
-		jsonModule.setSerializerModifier(createJsonSerializerModifier());
-		objectMapper.registerModule(jsonModule);
-
-		objectMapper.configure(SerializationFeature.WRAP_ROOT_VALUE, true);
-		objectMapper.configure(DeserializationFeature.UNWRAP_ROOT_VALUE, true);
-		objectMapper.addMixIn(Applications.class, ApplicationsJsonMixIn.class);
-		objectMapper.addMixIn(InstanceInfo.class, InstanceInfoJsonMixIn.class);
-
-		return objectMapper;
-	}
-
 	// Skip over 4xx http errors
 	private ExchangeFilterFunction http4XxErrorExchangeFilterFunction() {
 		return ExchangeFilterFunction.ofResponseProcessor(clientResponse -> {
@@ -153,9 +112,11 @@ public class WebClientTransportClientFactory implements TransportClientFactory {
 				return Mono.just(newResponse);
 			}
 			if (clientResponse.statusCode().equals(HttpStatus.NOT_FOUND)) {
-				ClientResponse newResponse = clientResponse.mutate().statusCode(clientResponse.statusCode())
-						// ignore body on 404 for heartbeat, see gh-4145
-						.body(Flux.empty()).build();
+				ClientResponse newResponse = clientResponse.mutate()
+					.statusCode(clientResponse.statusCode())
+					// ignore body on 404 for heartbeat, see gh-4145
+					.body(Flux.empty())
+					.build();
 				return Mono.just(newResponse);
 			}
 			return Mono.just(clientResponse);
@@ -164,6 +125,8 @@ public class WebClientTransportClientFactory implements TransportClientFactory {
 
 	@Override
 	public void shutdown() {
+		this.connectionProvider.dispose();
+		this.loopResources.dispose();
 	}
 
 }

spring-cloud-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/loadbalancer/EurekaLoadBalancerClientConfiguration.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2022 the original author or authors.
+ * Copyright 2013-present 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-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/loadbalancer/EurekaLoadBalancerProperties.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2022 the original author or authors.
+ * Copyright 2012-present 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-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/loadbalancer/LoadBalancerEurekaAutoConfiguration.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2022 the original author or authors.
+ * Copyright 2013-present 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-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/metadata/DefaultManagementMetadataProvider.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2022 the original author or authors.
+ * Copyright 2017-present 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-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/metadata/ManagementMetadata.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2022 the original author or authors.
+ * Copyright 2017-present 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-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/metadata/ManagementMetadataProvider.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2022 the original author or authors.
+ * Copyright 2017-present 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-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/reactive/EurekaReactiveDiscoveryClient.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2019-2022 the original author or authors.
+ * Copyright 2019-present 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.
@@ -52,15 +52,16 @@ public class EurekaReactiveDiscoveryClient implements ReactiveDiscoveryClient {
 	@Override
 	public Flux<ServiceInstance> getInstances(String serviceId) {
 		return Flux.defer(() -> Flux.fromIterable(eurekaClient.getInstancesByVipAddress(serviceId, false)))
-				.map(EurekaServiceInstance::new);
+			.map(EurekaServiceInstance::new);
 	}
 
 	@Override
 	public Flux<String> getServices() {
 		return Flux.defer(() -> Mono.justOrEmpty(eurekaClient.getApplications()))
-				.flatMapIterable(Applications::getRegisteredApplications)
-				.filter(application -> !application.getInstances().isEmpty()).map(Application::getName)
-				.map(String::toLowerCase);
+			.flatMapIterable(Applications::getRegisteredApplications)
+			.filter(application -> !application.getInstances().isEmpty())
+			.map(Application::getName)
+			.map(String::toLowerCase);
 	}
 
 	@Override

spring-cloud-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/reactive/EurekaReactiveDiscoveryClientConfiguration.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2019-2022 the original author or authors.
+ * Copyright 2019-present 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-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/serviceregistry/EurekaAutoServiceRegistration.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2022 the original author or authors.
+ * Copyright 2013-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -23,6 +23,7 @@ import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 
 import org.springframework.boot.web.context.WebServerInitializedEvent;
+import org.springframework.cloud.client.discovery.event.InstancePreRegisteredEvent;
 import org.springframework.cloud.client.discovery.event.InstanceRegisteredEvent;
 import org.springframework.cloud.client.serviceregistry.AutoServiceRegistration;
 import org.springframework.context.ApplicationContext;
@@ -33,11 +34,15 @@ import org.springframework.context.event.SmartApplicationListener;
 import org.springframework.core.Ordered;
 
 /**
+ * Provides an implementation of {@link AutoServiceRegistration} for registering service
+ * instances in Eureka.
+ *
  * @author Dave Syer
  * @author Spencer Gibb
  * @author Jon Schneider
  * @author Jakub Narloch
  * @author Raiyan Raiyan
+ * @author Olga Maciaszek-Sharma
  */
 public class EurekaAutoServiceRegistration
 		implements AutoServiceRegistration, SmartLifecycle, Ordered, SmartApplicationListener {
@@ -65,37 +70,38 @@ public class EurekaAutoServiceRegistration
 
 	@Override
 	public void start() {
-		// only set the port if the nonSecurePort or securePort is 0 and this.port != 0
-		if (this.port.get() != 0) {
-			if (this.registration.getNonSecurePort() == 0) {
-				this.registration.setNonSecurePort(this.port.get());
+		// only set the port if the nonSecurePort or securePort is 0 and port != 0
+		if (port.get() != 0) {
+			if (registration.getNonSecurePort() == 0) {
+				registration.setNonSecurePort(port.get());
 			}
 
-			if (this.registration.getSecurePort() == 0 && this.registration.isSecure()) {
-				this.registration.setSecurePort(this.port.get());
+			if (registration.getSecurePort() == 0 && registration.isSecure()) {
+				registration.setSecurePort(port.get());
 			}
 		}
 
 		// only initialize if nonSecurePort is greater than 0 and it isn't already running
 		// because of containerPortInitializer below
-		if (!this.running.get() && this.registration.getNonSecurePort() > 0) {
+		if (!running.get() && registration.getNonSecurePort() > 0) {
+			context.publishEvent(new InstancePreRegisteredEvent(this, registration));
 
-			this.serviceRegistry.register(this.registration);
+			serviceRegistry.register(registration);
 
-			this.context.publishEvent(new InstanceRegisteredEvent<>(this, this.registration.getInstanceConfig()));
-			this.running.set(true);
+			context.publishEvent(new InstanceRegisteredEvent<>(this, registration.getInstanceConfig()));
+			running.set(true);
 		}
 	}
 
 	@Override
 	public void stop() {
-		this.serviceRegistry.deregister(this.registration);
-		this.running.set(false);
+		serviceRegistry.deregister(registration);
+		running.set(false);
 	}
 
 	@Override
 	public boolean isRunning() {
-		return this.running.get();
+		return running.get();
 	}
 
 	@Override
@@ -116,7 +122,7 @@ public class EurekaAutoServiceRegistration
 
 	@Override
 	public int getOrder() {
-		return this.order;
+		return order;
 	}
 
 	@Override
@@ -140,9 +146,9 @@ public class EurekaAutoServiceRegistration
 		String contextName = event.getApplicationContext().getServerNamespace();
 		if (contextName == null || !contextName.equals("management")) {
 			int localPort = event.getWebServer().getPort();
-			if (this.port.get() == 0) {
+			if (port.get() == 0) {
 				log.info("Updating port to " + localPort);
-				this.port.compareAndSet(0, localPort);
+				port.compareAndSet(0, localPort);
 				start();
 			}
 		}

spring-cloud-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/serviceregistry/EurekaRegistration.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2022 the original author or authors.
+ * Copyright 2013-present 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-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/serviceregistry/EurekaServiceRegistry.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2022 the original author or authors.
+ * Copyright 2013-present 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.
@@ -17,25 +17,54 @@
 package org.springframework.cloud.netflix.eureka.serviceregistry;
 
 import java.util.HashMap;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
 
 import com.netflix.appinfo.InstanceInfo;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 
 import org.springframework.cloud.client.serviceregistry.ServiceRegistry;
+import org.springframework.cloud.netflix.eureka.EurekaInstanceConfigBean;
 
 import static com.netflix.appinfo.InstanceInfo.InstanceStatus.UNKNOWN;
 
 /**
  * @author Spencer Gibb
+ * @author Robert Bleyl
  */
 public class EurekaServiceRegistry implements ServiceRegistry<EurekaRegistration> {
 
 	private static final Log log = LogFactory.getLog(EurekaServiceRegistry.class);
 
+	private EurekaInstanceConfigBean eurekaInstanceConfigBean;
+
+	public EurekaServiceRegistry() {
+
+	}
+
+	public EurekaServiceRegistry(EurekaInstanceConfigBean eurekaInstanceConfigBean) {
+		this.eurekaInstanceConfigBean = eurekaInstanceConfigBean;
+	}
+
 	@Override
 	public void register(EurekaRegistration reg) {
-		maybeInitializeClient(reg);
+		if (eurekaInstanceConfigBean != null && eurekaInstanceConfigBean.isAsyncClientInitialization()) {
+			if (log.isDebugEnabled()) {
+				log.debug("Initializing client asynchronously...");
+			}
+
+			ExecutorService executorService = Executors.newSingleThreadExecutor();
+			executorService.submit(() -> {
+				maybeInitializeClient(reg);
+				if (log.isDebugEnabled()) {
+					log.debug("Asynchronous client initialization done.");
+				}
+			});
+		}
+		else {
+			maybeInitializeClient(reg);
+		}
 
 		if (log.isInfoEnabled()) {
 			log.info("Registering application " + reg.getApplicationInfoManager().getInfo().getAppName()
@@ -45,7 +74,7 @@ public class EurekaServiceRegistry implements ServiceRegistry<EurekaRegistration
 		reg.getApplicationInfoManager().setInstanceStatus(reg.getInstanceConfig().getInitialStatus());
 
 		reg.getHealthCheckHandler()
-				.ifAvailable(healthCheckHandler -> reg.getEurekaClient().registerHealthCheck(healthCheckHandler));
+			.ifAvailable(healthCheckHandler -> reg.getEurekaClient().registerHealthCheck(healthCheckHandler));
 	}
 
 	private void maybeInitializeClient(EurekaRegistration reg) {

spring-cloud-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/support/ZoneUtils.java

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