Deprecate OkHttp3ClientHttpRequestFactory

Closes gh-30919

spring-web/src/main/java/org/springframework/http/client/OkHttp3ClientHttpRequest.java

@@ -40,6 +40,7 @@ import org.springframework.util.StringUtils;
  * @author Roy Clarkson
  * @since 4.3
  */
+@Deprecated(since = "6.1", forRemoval = true)
 class OkHttp3ClientHttpRequest extends AbstractStreamingClientHttpRequest {
 
 	private final OkHttpClient client;
@@ -67,6 +68,7 @@ class OkHttp3ClientHttpRequest extends AbstractStreamingClientHttpRequest {
 	}
 
 	@Override
+	@SuppressWarnings("removal")
 	protected ClientHttpResponse executeInternal(HttpHeaders headers, @Nullable Body body) throws IOException {
 
 		RequestBody requestBody;

spring-web/src/main/java/org/springframework/http/client/OkHttp3ClientHttpRequestFactory.java

@@ -36,7 +36,10 @@ import org.springframework.util.Assert;
  * @author Arjen Poutsma
  * @author Roy Clarkson
  * @since 4.3
+ * @deprecated since 6.1, in favor of other {@link ClientHttpRequestFactory}
+ * implementations; scheduled for removal in 6.2
  */
+@Deprecated(since = "6.1", forRemoval = true)
 public class OkHttp3ClientHttpRequestFactory implements ClientHttpRequestFactory, DisposableBean {
 
 	private OkHttpClient client;
@@ -128,6 +131,7 @@ public class OkHttp3ClientHttpRequestFactory implements ClientHttpRequestFactory
 
 
 	@Override
+	@SuppressWarnings("removal")
 	public ClientHttpRequest createRequest(URI uri, HttpMethod httpMethod) {
 		return new OkHttp3ClientHttpRequest(this.client, uri, httpMethod);
 	}

spring-web/src/main/java/org/springframework/http/client/OkHttp3ClientHttpResponse.java

@@ -35,6 +35,7 @@ import org.springframework.util.Assert;
  * @author Roy Clarkson
  * @since 4.3
  */
+@Deprecated(since = "6.1", forRemoval = true)
 class OkHttp3ClientHttpResponse implements ClientHttpResponse {
 
 	private final Response response;

spring-web/src/main/java/org/springframework/web/client/DefaultRestClientBuilder.java

@@ -32,7 +32,6 @@ import org.springframework.http.client.ClientHttpRequestInterceptor;
 import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
 import org.springframework.http.client.JdkClientHttpRequestFactory;
 import org.springframework.http.client.JettyClientHttpRequestFactory;
-import org.springframework.http.client.OkHttp3ClientHttpRequestFactory;
 import org.springframework.http.client.SimpleClientHttpRequestFactory;
 import org.springframework.http.converter.ByteArrayHttpMessageConverter;
 import org.springframework.http.converter.HttpMessageConverter;
@@ -363,9 +362,6 @@ final class DefaultRestClientBuilder implements RestClient.Builder {
 		else if (httpComponentsClientPresent) {
 			return new HttpComponentsClientHttpRequestFactory();
 		}
-		else if (okHttpClientPresent) {
-			return new OkHttp3ClientHttpRequestFactory();
-		}
 		else if (jettyClientPresent) {
 			return new JettyClientHttpRequestFactory();
 		}

spring-web/src/main/java/org/springframework/web/client/RestClient.java

@@ -348,7 +348,6 @@ public interface RestClient {
 		 * client library (e.g. SSL).
 		 * <p>If no request factory is specified, {@code RestClient} uses
 		 * {@linkplain org.springframework.http.client.HttpComponentsClientHttpRequestFactory Apache Http Client},
-		 * {@linkplain org.springframework.http.client.OkHttp3ClientHttpRequestFactory OkHttp 3}, or
 		 * {@linkplain org.springframework.http.client.JettyClientHttpRequestFactory Jetty Http Client}
 		 * if available on the classpath, and defaults to the
 		 * {@linkplain org.springframework.http.client.JdkClientHttpRequestFactory JDK HttpClient}

spring-web/src/test/java/org/springframework/http/client/OkHttp3ClientHttpRequestFactoryTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2023 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.
@@ -25,6 +25,7 @@ import org.springframework.http.HttpMethod;
  */
 public class OkHttp3ClientHttpRequestFactoryTests extends AbstractHttpRequestFactoryTests {
 
+	@SuppressWarnings("removal")
 	@Override
 	protected ClientHttpRequestFactory createRequestFactory() {
 		return new OkHttp3ClientHttpRequestFactory();

spring-web/src/test/java/org/springframework/web/client/RestClientIntegrationTests.java

@@ -72,6 +72,7 @@ class RestClientIntegrationTests {
 	@interface ParameterizedRestClientTest {
 	}
 
+	@SuppressWarnings("removal")
 	static Stream<Named<ClientHttpRequestFactory>> clientHttpRequestFactories() {
 		return Stream.of(
 			named("JDK HttpURLConnection", new SimpleClientHttpRequestFactory()),

spring-web/src/test/java/org/springframework/web/client/RestTemplateIntegrationTests.java

@@ -91,6 +91,7 @@ class RestTemplateIntegrationTests extends AbstractMockWebServerTests {
 	@interface ParameterizedRestTemplateTest {
 	}
 
+	@SuppressWarnings("removal")
 	static Stream<Named<ClientHttpRequestFactory>> clientHttpRequestFactories() {
 		return Stream.of(
 			named("JDK HttpURLConnection", new SimpleClientHttpRequestFactory()),