Bumping versions

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

docs/pom.xml

@@ -17,6 +17,8 @@
 		<main.basedir>${basedir}/..</main.basedir>
 		<configprops.inclusionPattern>feign.*</configprops.inclusionPattern>
 		<upload-docs-zip.phase>deploy</upload-docs-zip.phase>
+		<!-- Don't upload docs jar to central / repo.spring.io -->
+		<maven-deploy-plugin-default.phase>none</maven-deploy-plugin-default.phase>
 	</properties>
 	<dependencies>
 		<dependency>

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

@@ -204,7 +204,7 @@ spring:
 
 Default configurations can be specified in the `@EnableFeignClients` attribute `defaultConfiguration` in a similar manner as described above. The difference is that this configuration will apply to _all_ feign clients.
 
-If you prefer using configuration properties to configured all `@FeignClient`, you can create configuration properties with `default` feign name.
+If you prefer using configuration properties to configure all `@FeignClient`, you can create configuration properties with `default` feign name.
 
 You can use `spring.cloud.openfeign.client.config.feignName.defaultQueryParameters` and `spring.cloud.openfeign.client.config.feignName.defaultRequestHeaders` to specify query parameters and headers that will be sent with every request of the client named `feignName`.
 
@@ -376,6 +376,45 @@ public class FooConfiguration {
 
 To enable Spring Cloud CircuitBreaker group set the `spring.cloud.openfeign.circuitbreaker.group.enabled` property to `true` (by default `false`).
 
+[[spring-clou-feign-circuitbreaker-configurationproperties]]
+=== Configuring CircuitBreakers With Configuration Properties
+
+You can configure CircuitBreakers via configuration properties.
+
+For example, if you had this Feign client
+
+[source,java,indent=0]
+----
+@FeignClient(url = "http://localhost:8080")
+public interface DemoClient {
+
+    @GetMapping("demo")
+    String getDemo();
+}
+----
+
+You could configure it using configuration properties by doing the following
+
+[source,yaml,indent=0]
+----
+feign:
+  circuitbreaker:
+    enabled: true
+    alphanumeric-ids:
+      enabled: true
+resilience4j:
+  circuitbreaker:
+    instances:
+      DemoClientgetDemo:
+        minimumNumberOfCalls: 69
+  timelimiter:
+    instances:
+      DemoClientgetDemo:
+        timeoutDuration: 10s
+----
+
+NOTE: If you want to switch back to the circuit breaker names used prior to Spring Cloud
+2022.0.0 you can set `spring.cloud.openfeign.circuitbreaker.alphanumeric-ids.enabled` to `false`.
 
 [[spring-cloud-feign-circuitbreaker-fallback]]
 === Feign Spring Cloud CircuitBreaker Fallbacks
@@ -776,6 +815,33 @@ Sometimes, when load balancing is enabled for Feign clients, you may want to use
 spring.cloud.openfeign.oauth2.load-balanced=true
 ----
 
+=== Transform the load-balanced HTTP request
+
+You can use the selected `ServiceInstance` to transform the load-balanced HTTP Request.
+
+For `Request`, you need to implement and define `LoadBalancerFeignRequestTransformer`, as follows:
+
+[source,java,indent=0]
+----
+	@Bean
+	public LoadBalancerFeignRequestTransformer transformer() {
+		return new LoadBalancerFeignRequestTransformer() {
+
+			@Override
+			public Request transformRequest(Request request, ServiceInstance instance) {
+				Map<String, Collection<String>> headers = new HashMap<>(request.headers());
+				headers.put("X-ServiceId", Collections.singletonList(instance.getServiceId()));
+				headers.put("X-InstanceId", Collections.singletonList(instance.getInstanceId()));
+				return Request.create(request.httpMethod(), request.url(), headers, request.body(), request.charset(),
+						request.requestTemplate());
+			}
+		};
+	}
+----
+
+If multiple transformers are defined, they are applied in the order in which beans are defined.
+Alternatively, you can use `LoadBalancerFeignRequestTransformer.DEFAULT_ORDER` to specify the order.
+
 == Configuration properties
 
 To see the list of all Spring Cloud OpenFeign related configuration properties please check link:appendix.html[the Appendix page].

pom.xml

@@ -135,7 +135,7 @@
 				<repository>
 					<id>spring-snapshots</id>
 					<name>Spring Snapshots</name>
-					<url>https://repo.spring.io/libs-snapshot-local</url>
+					<url>https://repo.spring.io/snapshot</url>
 					<snapshots>
 						<enabled>true</enabled>
 					</snapshots>
@@ -146,7 +146,7 @@
 				<repository>
 					<id>spring-milestones</id>
 					<name>Spring Milestones</name>
-					<url>https://repo.spring.io/libs-milestone-local</url>
+					<url>https://repo.spring.io/milestone</url>
 					<snapshots>
 						<enabled>false</enabled>
 					</snapshots>
@@ -164,7 +164,7 @@
 				<pluginRepository>
 					<id>spring-snapshots</id>
 					<name>Spring Snapshots</name>
-					<url>https://repo.spring.io/libs-snapshot-local</url>
+					<url>https://repo.spring.io/snapshot</url>
 					<snapshots>
 						<enabled>true</enabled>
 					</snapshots>
@@ -175,7 +175,7 @@
 				<pluginRepository>
 					<id>spring-milestones</id>
 					<name>Spring Milestones</name>
-					<url>https://repo.spring.io/libs-milestone-local</url>
+					<url>https://repo.spring.io/milestone</url>
 					<snapshots>
 						<enabled>false</enabled>
 					</snapshots>
@@ -183,7 +183,7 @@
 				<pluginRepository>
 					<id>spring-releases</id>
 					<name>Spring Releases</name>
-					<url>https://repo.spring.io/libs-release-local</url>
+					<url>https://repo.spring.io/release</url>
 					<snapshots>
 						<enabled>false</enabled>
 					</snapshots>

spring-cloud-openfeign-core/pom.xml

@@ -94,6 +94,13 @@
 		<dependency>
 			<groupId>io.github.openfeign.form</groupId>
 			<artifactId>feign-form-spring</artifactId>
+			<exclusions>
+<!--				Vulnerable in 3.8.0-->
+				<exclusion>
+					<groupId>commons-io</groupId>
+					<artifactId>commons-io</artifactId>
+				</exclusion>
+			</exclusions>
 		</dependency>
 		<dependency>
 			<groupId>io.github.openfeign</groupId>
@@ -138,6 +145,10 @@
 					<groupId>javax.activation</groupId>
 					<artifactId>javax.activation-api</artifactId>
 				</exclusion>
+				<exclusion>
+					<groupId>com.sun.activation</groupId>
+					<artifactId>jakarta.activation</artifactId>
+				</exclusion>
 			</exclusions>
 		</dependency>
 		<dependency>
@@ -198,6 +209,12 @@
 			<artifactId>spring-cloud-loadbalancer</artifactId>
 			<optional>true</optional>
 		</dependency>
+		<dependency>
+			<groupId>commons-io</groupId>
+			<artifactId>commons-io</artifactId>
+			<version>2.11.0</version>
+			<scope>test</scope>
+		</dependency>
 	</dependencies>
 	<profiles>
 		<profile>

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

@@ -165,10 +165,20 @@ public class FeignAutoConfiguration {
 
 		@Bean
 		@ConditionalOnMissingBean(CircuitBreakerNameResolver.class)
+		@ConditionalOnProperty(value = "spring.cloud.openfeign.circuitbreaker.alphanumeric-ids.enabled",
+				havingValue = "false")
 		public CircuitBreakerNameResolver circuitBreakerNameResolver() {
 			return new DefaultCircuitBreakerNameResolver();
 		}
 
+		@Bean
+		@ConditionalOnMissingBean(CircuitBreakerNameResolver.class)
+		@ConditionalOnProperty(value = "spring.cloud.openfeign.circuitbreaker.alphanumeric-ids.enabled",
+				havingValue = "true", matchIfMissing = true)
+		public CircuitBreakerNameResolver alphanumericCircuitBreakerNameResolver() {
+			return new AlphanumericCircuitBreakerNameResolver();
+		}
+
 		@Bean
 		@ConditionalOnMissingBean
 		@ConditionalOnBean(CircuitBreakerFactory.class)
@@ -188,6 +198,15 @@ public class FeignAutoConfiguration {
 
 		}
 
+		static class AlphanumericCircuitBreakerNameResolver extends DefaultCircuitBreakerNameResolver {
+
+			@Override
+			public String resolveCircuitBreakerName(String feignClientName, Target<?> target, Method method) {
+				return super.resolveCircuitBreakerName(feignClientName, target, method).replaceAll("[^a-zA-Z0-9]", "");
+			}
+
+		}
+
 	}
 
 	// the following configuration is for alternate feign clients if
@@ -327,6 +346,7 @@ public class FeignAutoConfiguration {
 	@Configuration(proxyBeanMethods = false)
 	@ConditionalOnClass(OAuth2ClientContext.class)
 	@ConditionalOnProperty("spring.cloud.openfeign.oauth2.enabled")
+	@Deprecated // spring-security-oauth2 reached EOL
 	protected static class Oauth2FeignConfiguration {
 
 		@ConditionalOnBean({ RetryLoadBalancerInterceptor.class, OAuth2ClientContext.class,

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

@@ -16,6 +16,8 @@
 
 package org.springframework.cloud.openfeign.loadbalancer;
 
+import java.util.List;
+
 import feign.Client;
 
 import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
@@ -36,6 +38,7 @@ import org.springframework.context.annotation.Configuration;
  * that uses {@link Client.Default} under the hood.
  *
  * @author Olga Maciaszek-Sharma
+ * @author changjin wei(魏昌进)
  * @since 2.2.0
  */
 @Configuration(proxyBeanMethods = false)
@@ -46,9 +49,10 @@ class DefaultFeignLoadBalancerConfiguration {
 	@ConditionalOnMissingBean
 	@Conditional(OnRetryNotEnabledCondition.class)
 	public Client feignClient(LoadBalancerClient loadBalancerClient,
-			LoadBalancerClientFactory loadBalancerClientFactory) {
+			LoadBalancerClientFactory loadBalancerClientFactory,
+			List<LoadBalancerFeignRequestTransformer> transformers) {
 		return new FeignBlockingLoadBalancerClient(new Client.Default(null, null), loadBalancerClient,
-				loadBalancerClientFactory);
+				loadBalancerClientFactory, transformers);
 	}
 
 	@Bean
@@ -58,9 +62,10 @@ class DefaultFeignLoadBalancerConfiguration {
 	@ConditionalOnProperty(value = "spring.cloud.loadbalancer.retry.enabled", havingValue = "true",
 			matchIfMissing = true)
 	public Client feignRetryClient(LoadBalancerClient loadBalancerClient,
-			LoadBalancedRetryFactory loadBalancedRetryFactory, LoadBalancerClientFactory loadBalancerClientFactory) {
+			LoadBalancedRetryFactory loadBalancedRetryFactory, LoadBalancerClientFactory loadBalancerClientFactory,
+			List<LoadBalancerFeignRequestTransformer> transformers) {
 		return new RetryableFeignBlockingLoadBalancerClient(new Client.Default(null, null), loadBalancerClient,
-				loadBalancedRetryFactory, loadBalancerClientFactory);
+				loadBalancedRetryFactory, loadBalancerClientFactory, transformers);
 	}
 
 }

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

@@ -19,6 +19,8 @@ package org.springframework.cloud.openfeign.loadbalancer;
 import java.io.IOException;
 import java.net.URI;
 import java.nio.charset.StandardCharsets;
+import java.util.Collections;
+import java.util.List;
 import java.util.Set;
 
 import feign.Client;
@@ -49,6 +51,7 @@ import static org.springframework.cloud.openfeign.loadbalancer.LoadBalancerUtils
  * {@link ServiceInstance} to use while resolving the request host.
  *
  * @author Olga Maciaszek-Sharma
+ * @author changjin wei(魏昌进)
  * @since 2.2.0
  */
 @SuppressWarnings({ "unchecked", "rawtypes" })
@@ -62,9 +65,11 @@ public class FeignBlockingLoadBalancerClient implements Client {
 
 	private final LoadBalancerClientFactory loadBalancerClientFactory;
 
+	private final List<LoadBalancerFeignRequestTransformer> transformers;
+
 	/**
 	 * @deprecated in favour of
-	 * {@link FeignBlockingLoadBalancerClient#FeignBlockingLoadBalancerClient(Client, LoadBalancerClient, LoadBalancerClientFactory)}
+	 * {@link FeignBlockingLoadBalancerClient#FeignBlockingLoadBalancerClient(Client, LoadBalancerClient, LoadBalancerClientFactory, List)}
 	 */
 	@Deprecated
 	public FeignBlockingLoadBalancerClient(Client delegate, LoadBalancerClient loadBalancerClient,
@@ -72,13 +77,29 @@ public class FeignBlockingLoadBalancerClient implements Client {
 		this.delegate = delegate;
 		this.loadBalancerClient = loadBalancerClient;
 		this.loadBalancerClientFactory = loadBalancerClientFactory;
+		this.transformers = Collections.emptyList();
 	}
 
+	/**
+	 * @deprecated in favour of
+	 * {@link FeignBlockingLoadBalancerClient#FeignBlockingLoadBalancerClient(Client, LoadBalancerClient, LoadBalancerClientFactory, List)}
+	 */
+	@Deprecated
 	public FeignBlockingLoadBalancerClient(Client delegate, LoadBalancerClient loadBalancerClient,
 			LoadBalancerClientFactory loadBalancerClientFactory) {
 		this.delegate = delegate;
 		this.loadBalancerClient = loadBalancerClient;
 		this.loadBalancerClientFactory = loadBalancerClientFactory;
+		this.transformers = Collections.emptyList();
+	}
+
+	public FeignBlockingLoadBalancerClient(Client delegate, LoadBalancerClient loadBalancerClient,
+			LoadBalancerClientFactory loadBalancerClientFactory,
+			List<LoadBalancerFeignRequestTransformer> transformers) {
+		this.delegate = delegate;
+		this.loadBalancerClient = loadBalancerClient;
+		this.loadBalancerClientFactory = loadBalancerClientFactory;
+		this.transformers = transformers;
 	}
 
 	@Override
@@ -109,7 +130,7 @@ public class FeignBlockingLoadBalancerClient implements Client {
 					.body(message, StandardCharsets.UTF_8).build();
 		}
 		String reconstructedUrl = loadBalancerClient.reconstructURI(instance, originalUri).toString();
-		Request newRequest = buildRequest(request, reconstructedUrl);
+		Request newRequest = buildRequest(request, reconstructedUrl, instance);
 		return executeWithLoadBalancerLifecycleProcessing(delegate, options, newRequest, lbRequest, lbResponse,
 				supportedLifecycleProcessors);
 	}
@@ -119,6 +140,16 @@ public class FeignBlockingLoadBalancerClient implements Client {
 				request.charset(), request.requestTemplate());
 	}
 
+	protected Request buildRequest(Request request, String reconstructedUrl, ServiceInstance instance) {
+		Request newRequest = buildRequest(request, reconstructedUrl);
+		if (transformers != null) {
+			for (LoadBalancerFeignRequestTransformer transformer : transformers) {
+				newRequest = transformer.transformRequest(newRequest, instance);
+			}
+		}
+		return newRequest;
+	}
+
 	// Visible for Sleuth instrumentation
 	public Client getDelegate() {
 		return delegate;

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

@@ -16,6 +16,8 @@
 
 package org.springframework.cloud.openfeign.loadbalancer;
 
+import java.util.List;
+
 import feign.Client;
 import feign.hc5.ApacheHttp5Client;
 import org.apache.hc.client5.http.classic.HttpClient;
@@ -40,6 +42,7 @@ import org.springframework.context.annotation.Import;
  * that uses {@link ApacheHttp5Client} under the hood.
  *
  * @author Nguyen Ky Thanh
+ * @author changjin wei(魏昌进)
  */
 @Configuration(proxyBeanMethods = false)
 @ConditionalOnClass(ApacheHttp5Client.class)
@@ -53,9 +56,11 @@ class HttpClient5FeignLoadBalancerConfiguration {
 	@ConditionalOnMissingBean
 	@Conditional(OnRetryNotEnabledCondition.class)
 	public Client feignClient(LoadBalancerClient loadBalancerClient, HttpClient httpClient5,
-			LoadBalancerClientFactory loadBalancerClientFactory) {
+			LoadBalancerClientFactory loadBalancerClientFactory,
+			List<LoadBalancerFeignRequestTransformer> transformers) {
 		Client delegate = new ApacheHttp5Client(httpClient5);
-		return new FeignBlockingLoadBalancerClient(delegate, loadBalancerClient, loadBalancerClientFactory);
+		return new FeignBlockingLoadBalancerClient(delegate, loadBalancerClient, loadBalancerClientFactory,
+				transformers);
 	}
 
 	@Bean
@@ -65,10 +70,11 @@ class HttpClient5FeignLoadBalancerConfiguration {
 	@ConditionalOnProperty(value = "spring.cloud.loadbalancer.retry.enabled", havingValue = "true",
 			matchIfMissing = true)
 	public Client feignRetryClient(LoadBalancerClient loadBalancerClient, HttpClient httpClient5,
-			LoadBalancedRetryFactory loadBalancedRetryFactory, LoadBalancerClientFactory loadBalancerClientFactory) {
+			LoadBalancedRetryFactory loadBalancedRetryFactory, LoadBalancerClientFactory loadBalancerClientFactory,
+			List<LoadBalancerFeignRequestTransformer> transformers) {
 		Client delegate = new ApacheHttp5Client(httpClient5);
 		return new RetryableFeignBlockingLoadBalancerClient(delegate, loadBalancerClient, loadBalancedRetryFactory,
-				loadBalancerClientFactory);
+				loadBalancerClientFactory, transformers);
 	}
 
 }

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

@@ -16,6 +16,8 @@
 
 package org.springframework.cloud.openfeign.loadbalancer;
 
+import java.util.List;
+
 import feign.Client;
 import feign.httpclient.ApacheHttpClient;
 import org.apache.http.client.HttpClient;
@@ -42,6 +44,7 @@ import org.springframework.context.annotation.Import;
  *
  * @author Olga Maciaszek-Sharma
  * @author Nguyen Ky Thanh
+ * @author changjin wei(魏昌进)
  * @since 2.2.0
  */
 @Configuration(proxyBeanMethods = false)
@@ -57,9 +60,11 @@ class HttpClientFeignLoadBalancerConfiguration {
 	@ConditionalOnMissingBean
 	@Conditional(OnRetryNotEnabledCondition.class)
 	public Client feignClient(LoadBalancerClient loadBalancerClient, HttpClient httpClient,
-			LoadBalancerClientFactory loadBalancerClientFactory) {
+			LoadBalancerClientFactory loadBalancerClientFactory,
+			List<LoadBalancerFeignRequestTransformer> transformers) {
 		ApacheHttpClient delegate = new ApacheHttpClient(httpClient);
-		return new FeignBlockingLoadBalancerClient(delegate, loadBalancerClient, loadBalancerClientFactory);
+		return new FeignBlockingLoadBalancerClient(delegate, loadBalancerClient, loadBalancerClientFactory,
+				transformers);
 	}
 
 	@Bean
@@ -69,10 +74,11 @@ class HttpClientFeignLoadBalancerConfiguration {
 	@ConditionalOnProperty(value = "spring.cloud.loadbalancer.retry.enabled", havingValue = "true",
 			matchIfMissing = true)
 	public Client feignRetryClient(LoadBalancerClient loadBalancerClient, HttpClient httpClient,
-			LoadBalancedRetryFactory loadBalancedRetryFactory, LoadBalancerClientFactory loadBalancerClientFactory) {
+			LoadBalancedRetryFactory loadBalancedRetryFactory, LoadBalancerClientFactory loadBalancerClientFactory,
+			List<LoadBalancerFeignRequestTransformer> transformers) {
 		ApacheHttpClient delegate = new ApacheHttpClient(httpClient);
 		return new RetryableFeignBlockingLoadBalancerClient(delegate, loadBalancerClient, loadBalancedRetryFactory,
-				loadBalancerClientFactory);
+				loadBalancerClientFactory, transformers);
 	}
 
 }

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

@@ -0,0 +1,47 @@
+/*
+ * Copyright 2013-2022 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.cloud.openfeign.loadbalancer;
+
+import feign.Request;
+
+import org.springframework.cloud.client.ServiceInstance;
+import org.springframework.core.annotation.Order;
+
+/**
+ * Allows applications to transform the load-balanced {@link Request} given the chosen
+ * {@link org.springframework.cloud.client.ServiceInstance}.
+ *
+ * @author changjin wei(魏昌进)
+ */
+@Order(LoadBalancerFeignRequestTransformer.DEFAULT_ORDER)
+public interface LoadBalancerFeignRequestTransformer {
+
+	/**
+	 * Order for the {@link LoadBalancerFeignRequestTransformer}.
+	 */
+	int DEFAULT_ORDER = 0;
+
+	/**
+	 * Allows transforming load-balanced requests based on the provided
+	 * {@link ServiceInstance}.
+	 * @param request Original request.
+	 * @param instance ServiceInstance returned from LoadBalancer.
+	 * @return New request or original request
+	 */
+	Request transformRequest(Request request, ServiceInstance instance);
+
+}

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

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

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

@@ -16,6 +16,8 @@
 
 package org.springframework.cloud.openfeign.loadbalancer;
 
+import java.util.List;
+
 import feign.Client;
 import feign.okhttp.OkHttpClient;
 
@@ -39,6 +41,7 @@ import org.springframework.context.annotation.Import;
  * that uses {@link OkHttpClient} under the hood.
  *
  * @author Olga Maciaszek-Sharma
+ * @author changjin wei(魏昌进)
  * @since 2.2.0
  */
 @Configuration(proxyBeanMethods = false)
@@ -53,9 +56,11 @@ class OkHttpFeignLoadBalancerConfiguration {
 	@ConditionalOnMissingBean
 	@Conditional(OnRetryNotEnabledCondition.class)
 	public Client feignClient(okhttp3.OkHttpClient okHttpClient, LoadBalancerClient loadBalancerClient,
-			LoadBalancerClientFactory loadBalancerClientFactory) {
+			LoadBalancerClientFactory loadBalancerClientFactory,
+			List<LoadBalancerFeignRequestTransformer> transformers) {
 		OkHttpClient delegate = new OkHttpClient(okHttpClient);
-		return new FeignBlockingLoadBalancerClient(delegate, loadBalancerClient, loadBalancerClientFactory);
+		return new FeignBlockingLoadBalancerClient(delegate, loadBalancerClient, loadBalancerClientFactory,
+				transformers);
 	}
 
 	@Bean
@@ -65,10 +70,11 @@ class OkHttpFeignLoadBalancerConfiguration {
 	@ConditionalOnProperty(value = "spring.cloud.loadbalancer.retry.enabled", havingValue = "true",
 			matchIfMissing = true)
 	public Client feignRetryClient(LoadBalancerClient loadBalancerClient, okhttp3.OkHttpClient okHttpClient,
-			LoadBalancedRetryFactory loadBalancedRetryFactory, LoadBalancerClientFactory loadBalancerClientFactory) {
+			LoadBalancedRetryFactory loadBalancedRetryFactory, LoadBalancerClientFactory loadBalancerClientFactory,
+			List<LoadBalancerFeignRequestTransformer> transformers) {
 		OkHttpClient delegate = new OkHttpClient(okHttpClient);
 		return new RetryableFeignBlockingLoadBalancerClient(delegate, loadBalancerClient, loadBalancedRetryFactory,
-				loadBalancerClientFactory);
+				loadBalancerClientFactory, transformers);
 	}
 
 }

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

@@ -20,6 +20,7 @@ import java.io.IOException;
 import java.net.URI;
 import java.util.ArrayList;
 import java.util.Collection;
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -65,6 +66,7 @@ import static org.springframework.cloud.openfeign.loadbalancer.LoadBalancerUtils
  * load-balanced with Spring Cloud LoadBalancer.
  *
  * @author Olga Maciaszek-Sharma
+ * @author changjin wei(魏昌进)
  * @since 2.2.6
  */
 @SuppressWarnings({ "rawtypes", "unchecked" })
@@ -80,9 +82,11 @@ public class RetryableFeignBlockingLoadBalancerClient implements Client {
 
 	private final LoadBalancerClientFactory loadBalancerClientFactory;
 
+	private final List<LoadBalancerFeignRequestTransformer> transformers;
+
 	/**
 	 * @deprecated in favour of
-	 * {@link RetryableFeignBlockingLoadBalancerClient#RetryableFeignBlockingLoadBalancerClient(Client, LoadBalancerClient, LoadBalancedRetryFactory, LoadBalancerClientFactory)}
+	 * {@link RetryableFeignBlockingLoadBalancerClient#RetryableFeignBlockingLoadBalancerClient(Client, LoadBalancerClient, LoadBalancedRetryFactory, LoadBalancerClientFactory, List)}
 	 */
 	@Deprecated
 	public RetryableFeignBlockingLoadBalancerClient(Client delegate, LoadBalancerClient loadBalancerClient,
@@ -92,14 +96,31 @@ public class RetryableFeignBlockingLoadBalancerClient implements Client {
 		this.loadBalancerClient = loadBalancerClient;
 		this.loadBalancedRetryFactory = loadBalancedRetryFactory;
 		this.loadBalancerClientFactory = loadBalancerClientFactory;
+		this.transformers = Collections.emptyList();
 	}
 
+	/**
+	 * @deprecated in favour of
+	 * {@link RetryableFeignBlockingLoadBalancerClient#RetryableFeignBlockingLoadBalancerClient(Client, LoadBalancerClient, LoadBalancedRetryFactory, LoadBalancerClientFactory, List)}
+	 */
+	@Deprecated
 	public RetryableFeignBlockingLoadBalancerClient(Client delegate, LoadBalancerClient loadBalancerClient,
 			LoadBalancedRetryFactory loadBalancedRetryFactory, LoadBalancerClientFactory loadBalancerClientFactory) {
 		this.delegate = delegate;
 		this.loadBalancerClient = loadBalancerClient;
 		this.loadBalancedRetryFactory = loadBalancedRetryFactory;
 		this.loadBalancerClientFactory = loadBalancerClientFactory;
+		this.transformers = Collections.emptyList();
+	}
+
+	public RetryableFeignBlockingLoadBalancerClient(Client delegate, LoadBalancerClient loadBalancerClient,
+			LoadBalancedRetryFactory loadBalancedRetryFactory, LoadBalancerClientFactory loadBalancerClientFactory,
+			List<LoadBalancerFeignRequestTransformer> transformers) {
+		this.delegate = delegate;
+		this.loadBalancerClient = loadBalancerClient;
+		this.loadBalancedRetryFactory = loadBalancedRetryFactory;
+		this.loadBalancerClientFactory = loadBalancerClientFactory;
+		this.transformers = transformers;
 	}
 
 	@Override
@@ -158,7 +179,7 @@ public class RetryableFeignBlockingLoadBalancerClient implements Client {
 					}
 					String reconstructedUrl = loadBalancerClient.reconstructURI(retrievedServiceInstance, originalUri)
 							.toString();
-					feignRequest = buildRequest(request, reconstructedUrl);
+					feignRequest = buildRequest(request, reconstructedUrl, retrievedServiceInstance);
 				}
 			}
 			org.springframework.cloud.client.loadbalancer.Response<ServiceInstance> lbResponse = new DefaultResponse(
@@ -191,6 +212,16 @@ public class RetryableFeignBlockingLoadBalancerClient implements Client {
 				request.charset(), request.requestTemplate());
 	}
 
+	protected Request buildRequest(Request request, String reconstructedUrl, ServiceInstance instance) {
+		Request newRequest = buildRequest(request, reconstructedUrl);
+		if (transformers != null) {
+			for (LoadBalancerFeignRequestTransformer transformer : transformers) {
+				newRequest = transformer.transformRequest(newRequest, instance);
+			}
+		}
+		return newRequest;
+	}
+
 	private RetryTemplate buildRetryTemplate(String serviceId, Request request, LoadBalancedRetryPolicy retryPolicy) {
 		RetryTemplate retryTemplate = new RetryTemplate();
 		BackOffPolicy backOffPolicy = this.loadBalancedRetryFactory.createBackOffPolicy(serviceId);

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

@@ -43,6 +43,7 @@ import org.springframework.security.oauth2.common.OAuth2AccessToken;
  * @author Tim Ysewyn
  * @since 3.0.0
  */
+@Deprecated // spring-security-oauth2 reached EOL
 public class OAuth2FeignRequestInterceptor implements RequestInterceptor {
 
 	/**

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

@@ -247,7 +247,7 @@ public class SpringEncoder implements Encoder {
 		return Objects.equals(APPLICATION_FORM_URLENCODED, requestContentType);
 	}
 
-	private boolean binaryContentType(FeignOutputMessage outputMessage) {
+	protected boolean binaryContentType(FeignOutputMessage outputMessage) {
 		MediaType contentType = outputMessage.getHeaders().getContentType();
 		return contentType == null || Stream
 				.of(MediaType.APPLICATION_CBOR, MediaType.APPLICATION_OCTET_STREAM, MediaType.APPLICATION_PDF,

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

@@ -20,6 +20,12 @@
 			"description": "If true, an OpenFeign client will be wrapped with a Spring Cloud CircuitBreaker circuit breaker with with group.",
 			"defaultValue": "false"
 		},
+		{
+			"name": "spring.cloud.openfeign.circuitbreaker.alphanumeric-ids.enabled",
+			"type": "java.lang.Boolean",
+			"description": "If true, Circuit Breaker ids will only contain alphanumeric characters to allow for configuration via configuration properties.",
+			"defaultValue": "false"
+		},
 		{
 			"name": "spring.cloud.openfeign.httpclient.enabled",
 			"type": "java.lang.Boolean",

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

@@ -27,7 +27,7 @@ import org.springframework.boot.test.context.assertj.AssertableApplicationContex
 import org.springframework.boot.test.context.runner.ApplicationContextRunner;
 import org.springframework.cloud.client.circuitbreaker.CircuitBreakerFactory;
 import org.springframework.cloud.client.loadbalancer.LoadBalancerInterceptor;
-import org.springframework.cloud.openfeign.FeignAutoConfiguration.CircuitBreakerPresentFeignTargeterConfiguration.DefaultCircuitBreakerNameResolver;
+import org.springframework.cloud.openfeign.FeignAutoConfiguration.CircuitBreakerPresentFeignTargeterConfiguration.AlphanumericCircuitBreakerNameResolver;
 import org.springframework.cloud.openfeign.security.MockOAuth2ClientContext;
 import org.springframework.cloud.openfeign.security.OAuth2FeignRequestInterceptor;
 import org.springframework.cloud.openfeign.security.OAuth2FeignRequestInterceptorBuilder;
@@ -66,7 +66,7 @@ class FeignAutoConfigurationTests {
 					assertOnlyOneTargeterPresent(ctx, FeignCircuitBreakerTargeter.class);
 					assertThatFeignCircuitBreakerTargeterHasGroupEnabledPropertyWithValue(ctx, false);
 					assertThatFeignCircuitBreakerTargeterHasSameCircuitBreakerNameResolver(ctx,
-							DefaultCircuitBreakerNameResolver.class);
+							AlphanumericCircuitBreakerNameResolver.class);
 				});
 	}
 

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

@@ -31,12 +31,12 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.cloud.openfeign.test.NoSecurityConfiguration;
+import org.springframework.cloud.test.TestSocketUtils;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.Import;
 import org.springframework.test.annotation.DirtiesContext;
 import org.springframework.util.ReflectionUtils;
-import org.springframework.util.SocketUtils;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.RestController;
 
@@ -66,7 +66,7 @@ class FeignHttpClientUrlTests {
 
 	@BeforeAll
 	static void beforeClass() {
-		port = SocketUtils.findAvailableTcpPort();
+		port = TestSocketUtils.findAvailableTcpPort();
 		System.setProperty("server.port", String.valueOf(port));
 	}
 

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

@@ -31,12 +31,12 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.cloud.openfeign.test.NoSecurityConfiguration;
+import org.springframework.cloud.test.TestSocketUtils;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.Import;
 import org.springframework.test.annotation.DirtiesContext;
 import org.springframework.util.ReflectionUtils;
-import org.springframework.util.SocketUtils;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.RestController;
 
@@ -67,7 +67,7 @@ class FeignHttpClientUrlTestsWithRetryableLoadBalancer {
 
 	@BeforeAll
 	static void beforeClass() {
-		port = SocketUtils.findAvailableTcpPort();
+		port = TestSocketUtils.findAvailableTcpPort();
 		System.setProperty("server.port", String.valueOf(port));
 	}
 

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

@@ -28,7 +28,7 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.boot.test.context.SpringBootTest.WebEnvironment;
-import org.springframework.boot.web.server.LocalServerPort;
+import org.springframework.boot.test.web.server.LocalServerPort;
 import org.springframework.cloud.openfeign.test.NoSecurityConfiguration;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.Import;

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

@@ -0,0 +1,79 @@
+/*
+ * Copyright 2013-2022 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.cloud.openfeign.circuitbreaker;
+
+import feign.Target;
+import org.junit.jupiter.api.Nested;
+import org.junit.jupiter.api.Test;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.cloud.openfeign.CircuitBreakerNameResolver;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+/**
+ * @author Ryan Baxter
+ */
+public class CircuitBreakerAutoConfigurationTests {
+
+	@SpringBootTest(classes = CircuitBreakerTests.Application.class,
+			webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT,
+			value = { "spring.application.name=springcircuittest", "spring.jmx.enabled=false",
+					"spring.cloud.openfeign.circuitbreaker.enabled=true",
+					"spring.cloud.openfeign.circuitbreaker.alphanumeric-ids.enabled=false" })
+	@Nested
+	class DefaultNamingStrategy {
+
+		@Autowired
+		CircuitBreakerNameResolver nameResolver;
+
+		@Test
+		public void assertDefaultNamingStrategy() throws Exception {
+			Target target = mock(Target.class);
+			when(target.type()).thenReturn(CircuitBreakerTests.TestClientWithFactory.class);
+			assertThat(nameResolver.resolveCircuitBreakerName("foo", target,
+					CircuitBreakerTests.TestClientWithFactory.class.getMethod("getHello")))
+							.isEqualTo("TestClientWithFactory#getHello()");
+		}
+
+	}
+
+	@SpringBootTest(classes = CircuitBreakerTests.Application.class,
+			webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT,
+			value = { "spring.application.name=springcircuittest", "spring.jmx.enabled=false",
+					"spring.cloud.openfeign.circuitbreaker.enabled=true" })
+	@Nested
+	class AlphanumericNamingStrategy {
+
+		@Autowired
+		CircuitBreakerNameResolver nameResolver;
+
+		@Test
+		public void assertAlphanumericNamingStrategy() throws Exception {
+			Target target = mock(Target.class);
+			when(target.type()).thenReturn(CircuitBreakerTests.TestClientWithFactory.class);
+			assertThat(nameResolver.resolveCircuitBreakerName("foo", target,
+					CircuitBreakerTests.TestClientWithFactory.class.getMethod("getHello")))
+							.isEqualTo("TestClientWithFactorygetHello");
+		}
+
+	}
+
+}

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

@@ -38,12 +38,12 @@ import org.springframework.cloud.openfeign.EnableFeignClients;
 import org.springframework.cloud.openfeign.FallbackFactory;
 import org.springframework.cloud.openfeign.FeignClient;
 import org.springframework.cloud.openfeign.test.NoSecurityConfiguration;
+import org.springframework.cloud.test.TestSocketUtils;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.Import;
 import org.springframework.stereotype.Component;
 import org.springframework.test.annotation.DirtiesContext;
-import org.springframework.util.SocketUtils;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.RestController;
 
@@ -73,7 +73,7 @@ class CircuitBreakerTests {
 
 	@BeforeAll
 	static void beforeClass() {
-		System.setProperty("server.port", String.valueOf(SocketUtils.findAvailableTcpPort()));
+		System.setProperty("server.port", String.valueOf(TestSocketUtils.findAvailableTcpPort()));
 	}
 
 	@AfterAll

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

@@ -35,11 +35,11 @@ import org.springframework.cloud.client.circuitbreaker.NoFallbackAvailableExcept
 import org.springframework.cloud.openfeign.EnableFeignClients;
 import org.springframework.cloud.openfeign.FeignClient;
 import org.springframework.cloud.openfeign.test.NoSecurityConfiguration;
+import org.springframework.cloud.test.TestSocketUtils;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.Import;
 import org.springframework.test.annotation.DirtiesContext;
-import org.springframework.util.SocketUtils;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.RestController;
 
@@ -66,7 +66,7 @@ public class CircuitBreakerWithNoFallbackTests {
 
 	@BeforeAll
 	public static void beforeClass() {
-		System.setProperty("server.port", String.valueOf(SocketUtils.findAvailableTcpPort()));
+		System.setProperty("server.port", String.valueOf(TestSocketUtils.findAvailableTcpPort()));
 	}
 
 	@AfterAll

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

@@ -23,7 +23,7 @@ import org.junit.jupiter.api.Test;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.boot.test.context.SpringBootTest;
-import org.springframework.boot.web.server.LocalServerPort;
+import org.springframework.boot.test.web.server.LocalServerPort;
 import org.springframework.cloud.client.DefaultServiceInstance;
 import org.springframework.cloud.loadbalancer.annotation.LoadBalancerClient;
 import org.springframework.cloud.loadbalancer.core.ServiceInstanceListSupplier;

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

@@ -23,7 +23,7 @@ import org.junit.jupiter.api.Test;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.boot.test.context.SpringBootTest;
-import org.springframework.boot.web.server.LocalServerPort;
+import org.springframework.boot.test.web.server.LocalServerPort;
 import org.springframework.cloud.client.DefaultServiceInstance;
 import org.springframework.cloud.loadbalancer.annotation.LoadBalancerClient;
 import org.springframework.cloud.loadbalancer.core.ServiceInstanceListSupplier;

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

@@ -25,7 +25,7 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.boot.autoconfigure.data.rest.RepositoryRestMvcAutoConfiguration;
 import org.springframework.boot.test.context.SpringBootTest;
-import org.springframework.boot.web.server.LocalServerPort;
+import org.springframework.boot.test.web.server.LocalServerPort;
 import org.springframework.cloud.client.DefaultServiceInstance;
 import org.springframework.cloud.loadbalancer.annotation.LoadBalancerClient;
 import org.springframework.cloud.loadbalancer.core.ServiceInstanceListSupplier;

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

@@ -27,9 +27,14 @@ import org.springframework.cloud.openfeign.encoding.app.domain.Invoice;
  * Utility class used for testing.
  *
  * @author Jakub Narloch
+ * @author Olga Maciaszek-Sharma
  */
 final class Invoices {
 
+	private Invoices() {
+		throw new IllegalStateException("Can't instantiate a utility class");
+	}
+
 	public static List<Invoice> createInvoiceList(int count) {
 		final List<Invoice> invoices = new ArrayList<>();
 		for (int ind = 0; ind < count; ind++) {

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

@@ -74,21 +74,21 @@ public final class Request extends com.google.protobuf.GeneratedMessageV3 implem
 			while (!done) {
 				int tag = input.readTag();
 				switch (tag) {
-				case 0:
-					done = true;
-					break;
-				default:
-					if (!parseUnknownFieldProto3(input, unknownFields, extensionRegistry, tag)) {
+					case 0:
 						done = true;
-					}
-					break;
-				case 8:
-					this.id_ = input.readInt32();
-					break;
-				case 18:
-					String s = input.readStringRequireUtf8();
-					this.msg_ = s;
-					break;
+						break;
+					default:
+						if (!parseUnknownFieldProto3(input, unknownFields, extensionRegistry, tag)) {
+							done = true;
+						}
+						break;
+					case 8:
+						this.id_ = input.readInt32();
+						break;
+					case 18:
+						String s = input.readStringRequireUtf8();
+						this.msg_ = s;
+						break;
 				}
 			}
 		}

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

@@ -18,7 +18,7 @@ package org.springframework.cloud.openfeign.hateoas.app;
 
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.boot.autoconfigure.data.rest.RepositoryRestMvcAutoConfiguration;
-import org.springframework.boot.web.server.LocalServerPort;
+import org.springframework.boot.test.web.server.LocalServerPort;
 import org.springframework.cloud.client.DefaultServiceInstance;
 import org.springframework.cloud.loadbalancer.annotation.LoadBalancerClient;
 import org.springframework.cloud.loadbalancer.core.ServiceInstanceListSupplier;

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

@@ -21,9 +21,11 @@ import java.io.IOException;
 import java.io.InputStreamReader;
 import java.net.URI;
 import java.nio.charset.StandardCharsets;
+import java.util.Arrays;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.HashMap;
+import java.util.List;
 import java.util.Map;
 import java.util.UUID;
 import java.util.concurrent.ConcurrentHashMap;
@@ -66,6 +68,7 @@ import static org.mockito.Mockito.when;
  * {@link FeignBlockingLoadBalancerClient} and its delegates.
  *
  * @author Olga Maciaszek-Sharma
+ * @author changjin wei(魏昌进)
  * @see <a href=
  * "https://github.com/spring-cloud/spring-cloud-commons/blob/main/spring-cloud-loadbalancer/src/test/java/org/springframework/cloud/loadbalancer/blocking/client/BlockingLoadBalancerClientTests.java">BlockingLoadBalancerClientTests</a>
  */
@@ -80,8 +83,11 @@ class FeignBlockingLoadBalancerClientTests {
 
 	private final LoadBalancerProperties loadBalancerProperties = new LoadBalancerProperties();
 
+	private final List<LoadBalancerFeignRequestTransformer> transformers = Arrays.asList(new InstanceIdTransformer(),
+			new ServiceIdTransformer());
+
 	private final FeignBlockingLoadBalancerClient feignBlockingLoadBalancerClient = new FeignBlockingLoadBalancerClient(
-			delegate, loadBalancerClient, loadBalancerClientFactory);
+			delegate, loadBalancerClient, loadBalancerClientFactory, transformers);
 
 	@BeforeEach
 	void setUp() {
@@ -133,9 +139,11 @@ class FeignBlockingLoadBalancerClientTests {
 		Request actualRequest = captor.getValue();
 		assertThat(actualRequest.httpMethod()).isEqualTo(Request.HttpMethod.GET);
 		assertThat(actualRequest.url()).isEqualTo(url);
-		assertThat(actualRequest.headers()).hasSize(1);
+		assertThat(actualRequest.headers()).hasSize(3);
 		assertThat(actualRequest.headers()).containsEntry(HttpHeaders.CONTENT_TYPE,
 				Collections.singletonList(MediaType.APPLICATION_JSON_VALUE));
+		assertThat(actualRequest.headers()).containsEntry("X-ServiceId", Collections.singletonList("test"));
+		assertThat(actualRequest.headers()).containsEntry("X-InstanceId", Collections.singletonList("test-1"));
 		assertThat(new String(actualRequest.body())).isEqualTo("hello");
 	}
 
@@ -253,4 +261,28 @@ class FeignBlockingLoadBalancerClientTests {
 
 	}
 
+	private static class InstanceIdTransformer implements LoadBalancerFeignRequestTransformer {
+
+		@Override
+		public Request transformRequest(Request request, ServiceInstance instance) {
+			Map<String, Collection<String>> headers = new HashMap<>(request.headers());
+			headers.put("X-InstanceId", Collections.singletonList(instance.getInstanceId()));
+			return Request.create(request.httpMethod(), request.url(), headers, request.body(), request.charset(),
+					request.requestTemplate());
+		}
+
+	}
+
+	private static class ServiceIdTransformer implements LoadBalancerFeignRequestTransformer {
+
+		@Override
+		public Request transformRequest(Request request, ServiceInstance instance) {
+			Map<String, Collection<String>> headers = new HashMap<>(request.headers());
+			headers.put("X-ServiceId", Collections.singletonList(instance.getServiceId()));
+			return Request.create(request.httpMethod(), request.url(), headers, request.body(), request.charset(),
+					request.requestTemplate());
+		}
+
+	}
+
 }

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

@@ -22,9 +22,11 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.net.URI;
 import java.nio.charset.StandardCharsets;
+import java.util.Arrays;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.HashMap;
+import java.util.List;
 import java.util.Map;
 import java.util.UUID;
 import java.util.concurrent.ConcurrentHashMap;
@@ -70,6 +72,7 @@ import static org.mockito.Mockito.when;
  * {@link RetryableFeignBlockingLoadBalancerClient} and its delegates.
  *
  * @author Olga Maciaszek-Sharma
+ * @author changjin wei(魏昌进)
  * @see <a href=
  * "https://github.com/spring-cloud/spring-cloud-commons/blob/main/spring-cloud-loadbalancer/src/test/java/org/springframework/cloud/loadbalancer/blocking/client/BlockingLoadBalancerClientTests.java">BlockingLoadBalancerClientTests</a>
  */
@@ -86,8 +89,11 @@ class RetryableFeignBlockingLoadBalancerClientTests {
 
 	private final LoadBalancerProperties properties = new LoadBalancerProperties();
 
+	private final List<LoadBalancerFeignRequestTransformer> transformers = Arrays.asList(new InstanceIdTransformer(),
+			new ServiceIdTransformer());
+
 	private final RetryableFeignBlockingLoadBalancerClient feignBlockingLoadBalancerClient = new RetryableFeignBlockingLoadBalancerClient(
-			delegate, loadBalancerClient, retryFactory, properties, loadBalancerClientFactory);
+			delegate, loadBalancerClient, retryFactory, loadBalancerClientFactory, transformers);
 
 	private final ServiceInstance serviceInstance = new DefaultServiceInstance("test-a", "test", "testhost", 80, false);
 
@@ -197,9 +203,11 @@ class RetryableFeignBlockingLoadBalancerClientTests {
 		Request actualRequest = captor.getValue();
 		assertThat(actualRequest.httpMethod()).isEqualTo(Request.HttpMethod.GET);
 		assertThat(actualRequest.url()).isEqualTo(url);
-		assertThat(actualRequest.headers()).hasSize(1);
+		assertThat(actualRequest.headers()).hasSize(3);
 		assertThat(actualRequest.headers()).containsEntry(HttpHeaders.CONTENT_TYPE,
 				Collections.singletonList(MediaType.APPLICATION_JSON_VALUE));
+		assertThat(actualRequest.headers()).containsEntry("X-ServiceId", Collections.singletonList("test"));
+		assertThat(actualRequest.headers()).containsEntry("X-InstanceId", Collections.singletonList("test-1"));
 		assertThat(new String(actualRequest.body())).isEqualTo("hello");
 	}
 
@@ -310,4 +318,28 @@ class RetryableFeignBlockingLoadBalancerClientTests {
 
 	}
 
+	private static class InstanceIdTransformer implements LoadBalancerFeignRequestTransformer {
+
+		@Override
+		public Request transformRequest(Request request, ServiceInstance instance) {
+			Map<String, Collection<String>> headers = new HashMap<>(request.headers());
+			headers.put("X-InstanceId", Collections.singletonList(instance.getInstanceId()));
+			return Request.create(request.httpMethod(), request.url(), headers, request.body(), request.charset(),
+					request.requestTemplate());
+		}
+
+	}
+
+	private static class ServiceIdTransformer implements LoadBalancerFeignRequestTransformer {
+
+		@Override
+		public Request transformRequest(Request request, ServiceInstance instance) {
+			Map<String, Collection<String>> headers = new HashMap<>(request.headers());
+			headers.put("X-ServiceId", Collections.singletonList(instance.getServiceId()));
+			return Request.create(request.httpMethod(), request.url(), headers, request.body(), request.charset(),
+					request.requestTemplate());
+		}
+
+	}
+
 }

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

@@ -28,11 +28,11 @@ import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
 import org.springframework.cloud.openfeign.EnableFeignClients;
 import org.springframework.cloud.openfeign.FeignClient;
 import org.springframework.cloud.openfeign.test.NoSecurityConfiguration;
+import org.springframework.cloud.test.TestSocketUtils;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.Import;
 import org.springframework.http.HttpHeaders;
-import org.springframework.util.SocketUtils;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RequestBody;
@@ -49,7 +49,7 @@ public class AbstractSpringMvcContractIntegrationTests {
 
 	@BeforeAll
 	public static void beforeClass() {
-		System.setProperty("server.port", String.valueOf(SocketUtils.findAvailableTcpPort()));
+		System.setProperty("server.port", String.valueOf(TestSocketUtils.findAvailableTcpPort()));
 	}
 
 	@AfterAll

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

@@ -21,7 +21,7 @@ import org.junit.jupiter.api.Test;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
 import org.springframework.boot.test.context.SpringBootTest;
-import org.springframework.boot.web.server.LocalServerPort;
+import org.springframework.boot.test.web.server.LocalServerPort;
 import org.springframework.cloud.client.DefaultServiceInstance;
 import org.springframework.cloud.loadbalancer.annotation.LoadBalancerClient;
 import org.springframework.cloud.loadbalancer.core.ServiceInstanceListSupplier;

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

@@ -78,7 +78,9 @@ import static org.junit.jupiter.api.Assumptions.assumeTrue;
  * @author Olga Maciaszek-Sharma
  * @author Szymon Linowski
  * @author Sam Kruglov
- */
+ * @author Bhavya Agrawal
+ **/
+
 class SpringMvcContractTests {
 
 	private static final Class<?> EXECUTABLE_TYPE;
@@ -171,6 +173,39 @@ class SpringMvcContractTests {
 		assertThat(data.indexToName().get(0).iterator().next()).isEqualTo("id");
 	}
 
+	@Test
+	void testProcessAnnotations_SimpleNoPath() throws Exception {
+		Method method = TestTemplate_Simple.class.getDeclaredMethod("getTest");
+		MethodMetadata data = contract.parseAndValidateMetadata(method.getDeclaringClass(), method);
+
+		assertThat(data.template().url()).isEqualTo("/");
+		assertThat(data.template().method()).isEqualTo("GET");
+		assertThat(data.template().headers().get("Accept").iterator().next())
+				.isEqualTo(MediaType.APPLICATION_JSON_VALUE);
+	}
+
+	@Test
+	void testProcessAnnotations_SimplePathIsOnlyASlash() throws Exception {
+		Method method = TestTemplate_Simple.class.getDeclaredMethod("getSlashPath", String.class);
+		MethodMetadata data = contract.parseAndValidateMetadata(method.getDeclaringClass(), method);
+
+		assertThat(data.template().url()).isEqualTo("/?id=" + "{id}");
+		assertThat(data.template().method()).isEqualTo("GET");
+		assertThat(data.template().headers().get("Accept").iterator().next())
+				.isEqualTo(MediaType.APPLICATION_JSON_VALUE);
+	}
+
+	@Test
+	void testProcessAnnotations_MissingLeadingSlashInPath() throws Exception {
+		Method method = TestTemplate_Simple.class.getDeclaredMethod("getTestNoLeadingSlash", String.class);
+		MethodMetadata data = contract.parseAndValidateMetadata(method.getDeclaringClass(), method);
+
+		assertThat(data.template().url()).isEqualTo("/test?name=" + "{name}");
+		assertThat(data.template().method()).isEqualTo("GET");
+		assertThat(data.template().headers().get("Accept").iterator().next())
+				.isEqualTo(MediaType.APPLICATION_JSON_VALUE);
+	}
+
 	@Test
 	void testProcessAnnotations_SimpleGetMapping() throws Exception {
 		Method method = TestTemplate_Simple.class.getDeclaredMethod("getMappingTest", String.class);
@@ -616,6 +651,12 @@ class SpringMvcContractTests {
 		@PostMapping(produces = MediaType.APPLICATION_JSON_VALUE)
 		TestObject postMappingTest(@RequestBody TestObject object);
 
+		@GetMapping(value = "/", produces = MediaType.APPLICATION_JSON_VALUE)
+		ResponseEntity<TestObject> getSlashPath(@RequestParam("id") String id);
+
+		@GetMapping(path = "test", produces = MediaType.APPLICATION_JSON_VALUE)
+		ResponseEntity<TestObject> getTestNoLeadingSlash(@RequestParam("name") String name);
+
 	}
 
 	@RequestMapping("/prepend/{classId}")

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

@@ -24,8 +24,13 @@ import static org.assertj.core.api.Assertions.assertThat;
  * {@link Object#equals(Object)} and {@link Object#hashCode()}.
  *
  * @author Jonatan Ivanov
+ * @author Olga Maciaszek-Sharma
  */
-public class EqualsAndHashCodeAssert {
+public final class EqualsAndHashCodeAssert {
+
+	private EqualsAndHashCodeAssert() {
+		throw new IllegalStateException("Can't instantiate a utility class");
+	}
 
 	/**
 	 * Checks if equals is reflexive: for any non-null reference value x, x.equals(x)

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

@@ -24,7 +24,7 @@ import org.junit.jupiter.api.Test;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
 import org.springframework.boot.test.context.SpringBootTest;
-import org.springframework.boot.web.server.LocalServerPort;
+import org.springframework.boot.test.web.server.LocalServerPort;
 import org.springframework.cloud.client.DefaultServiceInstance;
 import org.springframework.cloud.loadbalancer.annotation.LoadBalancerClient;
 import org.springframework.cloud.loadbalancer.core.ServiceInstanceListSupplier;

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

@@ -25,7 +25,7 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.boot.test.context.SpringBootTest.WebEnvironment;
-import org.springframework.boot.web.server.LocalServerPort;
+import org.springframework.boot.test.web.server.LocalServerPort;
 import org.springframework.cloud.client.DefaultServiceInstance;
 import org.springframework.cloud.loadbalancer.annotation.LoadBalancerClient;
 import org.springframework.cloud.loadbalancer.annotation.LoadBalancerClients;

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

@@ -25,7 +25,7 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.boot.test.context.SpringBootTest.WebEnvironment;
-import org.springframework.boot.web.server.LocalServerPort;
+import org.springframework.boot.test.web.server.LocalServerPort;
 import org.springframework.cloud.client.DefaultServiceInstance;
 import org.springframework.cloud.loadbalancer.annotation.LoadBalancerClient;
 import org.springframework.cloud.loadbalancer.annotation.LoadBalancerClients;

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

@@ -24,7 +24,7 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.boot.test.context.SpringBootTest.WebEnvironment;
-import org.springframework.boot.web.server.LocalServerPort;
+import org.springframework.boot.test.web.server.LocalServerPort;
 import org.springframework.cloud.client.DefaultServiceInstance;
 import org.springframework.cloud.loadbalancer.annotation.LoadBalancerClient;
 import org.springframework.cloud.loadbalancer.core.ServiceInstanceListSupplier;

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

@@ -46,7 +46,7 @@ import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
 import org.springframework.boot.builder.SpringApplicationBuilder;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.boot.test.context.SpringBootTest.WebEnvironment;
-import org.springframework.boot.web.server.LocalServerPort;
+import org.springframework.boot.test.web.server.LocalServerPort;
 import org.springframework.cloud.client.DefaultServiceInstance;
 import org.springframework.cloud.loadbalancer.annotation.LoadBalancerClient;
 import org.springframework.cloud.loadbalancer.annotation.LoadBalancerClients;

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

@@ -21,7 +21,7 @@ import org.junit.jupiter.api.Test;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
 import org.springframework.boot.test.context.SpringBootTest;
-import org.springframework.boot.web.server.LocalServerPort;
+import org.springframework.boot.test.web.server.LocalServerPort;
 import org.springframework.cloud.client.DefaultServiceInstance;
 import org.springframework.cloud.loadbalancer.annotation.LoadBalancerClient;
 import org.springframework.cloud.loadbalancer.core.ServiceInstanceListSupplier;

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

@@ -23,7 +23,7 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
 import org.springframework.boot.test.context.SpringBootTest;
-import org.springframework.boot.web.server.LocalServerPort;
+import org.springframework.boot.test.web.server.LocalServerPort;
 import org.springframework.cloud.client.DefaultServiceInstance;
 import org.springframework.cloud.loadbalancer.annotation.LoadBalancerClients;
 import org.springframework.cloud.loadbalancer.core.ServiceInstanceListSupplier;

spring-cloud-openfeign-dependencies/pom.xml

@@ -17,7 +17,8 @@
 	<properties>
 		<feign.version>11.8</feign.version>
 		<feign-form.version>3.8.0</feign-form.version>
-		<spring-security-oauth2-autoconfigure.version>2.1.2.RELEASE</spring-security-oauth2-autoconfigure.version>
+		<!-- Deprecated - reached EOL -->
+		<spring-security-oauth2-autoconfigure.version>2.5.2</spring-security-oauth2-autoconfigure.version>
 	</properties>
 	<dependencyManagement>
 		<dependencies>
@@ -57,7 +58,7 @@
 				<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>
@@ -68,7 +69,7 @@
 				<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>
@@ -86,7 +87,7 @@
 				<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>
@@ -97,7 +98,7 @@
 				<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>

src/checkstyle/checkstyle-suppressions.xml

@@ -12,6 +12,8 @@
 	<suppress files=".*ProtobufSpringEncoderTest.*" checks="LineLengthCheck" />
 	<suppress files=".*ProtobufTest.*" checks="LineLengthCheck" />
 	<suppress files=".*Hello.*" checks="RedundantModifier"/>
+	<suppress files=".*test.*" checks="JavadocStyle"/>
+	<suppress files=".*test.*" checks="JavadocVariable"/>
 	<!-- Important -->
 	<suppress files=".*HttpEncoding.*" checks="InterfaceIsTypeCheck" />
 </suppressions>