Reinstate support for read timeouts with RestTemplateBuilder

Refactor the way `ClientHttpRequestFactory` instances are created in
order to support setting read timeouts.

Prior to this commit, the reflection based approach would call
`setReadTimeout`. As of Spring Framework 6.0, the
`HttpComponentsClientHttpRequestFactory` class no longer supports this
approach. The timeout must be set on the `HttpClientConnectionManager`
used in the `HttpClient` which can be passed in to the constructor.

In order to support this approach, the `ClientHttpRequestFactory` can
now be created using a `Function` rather than a `Supplier`. The
function accepts a `ClientHttpRequestFactorySettings` which provides
the timeout settings to apply.

The `ClientHttpRequestFactories` utility class provides methods to
create `ClientHttpRequestFactory` instances that respect the settings.
Whenever possible, these are created without using reflection.

Fixes gh-32857

Co-authored-by: Phillip Webb <pwebb@vmware.com>

spring-boot-project/spring-boot-test/src/main/java/org/springframework/boot/test/web/client/TestRestTemplate.java

@@ -18,16 +18,22 @@ package org.springframework.boot.test.web.client;
 
 import java.io.IOException;
 import java.net.URI;
+import java.security.KeyManagementException;
+import java.security.KeyStoreException;
+import java.security.NoSuchAlgorithmException;
+import java.time.Duration;
 import java.util.Arrays;
 import java.util.HashSet;
 import java.util.Map;
 import java.util.Set;
+import java.util.concurrent.TimeUnit;
 
 import javax.net.ssl.SSLContext;
 
 import org.apache.hc.client5.http.classic.HttpClient;
 import org.apache.hc.client5.http.config.RequestConfig;
 import org.apache.hc.client5.http.cookie.StandardCookieSpec;
+import org.apache.hc.client5.http.impl.classic.HttpClientBuilder;
 import org.apache.hc.client5.http.impl.classic.HttpClients;
 import org.apache.hc.client5.http.impl.io.PoolingHttpClientConnectionManager;
 import org.apache.hc.client5.http.impl.io.PoolingHttpClientConnectionManagerBuilder;
@@ -35,10 +41,12 @@ import org.apache.hc.client5.http.protocol.HttpClientContext;
 import org.apache.hc.client5.http.ssl.SSLConnectionSocketFactory;
 import org.apache.hc.client5.http.ssl.SSLConnectionSocketFactoryBuilder;
 import org.apache.hc.client5.http.ssl.TrustSelfSignedStrategy;
+import org.apache.hc.core5.http.io.SocketConfig;
 import org.apache.hc.core5.http.protocol.HttpContext;
 import org.apache.hc.core5.http.ssl.TLS;
 import org.apache.hc.core5.ssl.SSLContextBuilder;
 
+import org.springframework.boot.web.client.ClientHttpRequestFactorySettings;
 import org.springframework.boot.web.client.RestTemplateBuilder;
 import org.springframework.boot.web.client.RootUriTemplateHandler;
 import org.springframework.core.ParameterizedTypeReference;
@@ -138,8 +146,8 @@ public class TestRestTemplate {
 		if (httpClientOptions != null) {
 			ClientHttpRequestFactory requestFactory = builder.buildRequestFactory();
 			if (requestFactory instanceof HttpComponentsClientHttpRequestFactory) {
-				builder = builder
+				builder = builder.requestFactory(
-						.requestFactory(() -> new CustomHttpComponentsClientHttpRequestFactory(httpClientOptions));
+						(settings) -> new CustomHttpComponentsClientHttpRequestFactory(httpClientOptions, settings));
 			}
 		}
 		if (username != null || password != null) {
@@ -1000,43 +1008,71 @@ public class TestRestTemplate {
 
 		private final boolean enableRedirects;
 
-		public CustomHttpComponentsClientHttpRequestFactory(HttpClientOption[] httpClientOptions) {
+		public CustomHttpComponentsClientHttpRequestFactory(HttpClientOption[] httpClientOptions,
+				ClientHttpRequestFactorySettings settings) {
 			Set<HttpClientOption> options = new HashSet<>(Arrays.asList(httpClientOptions));
 			this.cookieSpec = (options.contains(HttpClientOption.ENABLE_COOKIES) ? StandardCookieSpec.STRICT
 					: StandardCookieSpec.IGNORE);
 			this.enableRedirects = options.contains(HttpClientOption.ENABLE_REDIRECTS);
-			if (options.contains(HttpClientOption.SSL)) {
+			boolean ssl = options.contains(HttpClientOption.SSL);
-				setHttpClient(createSslHttpClient());
+			if (settings.readTimeout() != null || ssl) {
+				setHttpClient(createHttpClient(settings.readTimeout(), ssl));
+			}
+			if (settings.connectTimeout() != null) {
+				setConnectTimeout((int) settings.connectTimeout().toMillis());
+			}
+			if (settings.bufferRequestBody() != null) {
+				setBufferRequestBody(settings.bufferRequestBody());
 			}
 		}
 
-		private HttpClient createSslHttpClient() {
+		private HttpClient createHttpClient(Duration readTimeout, boolean ssl) {
 			try {
-				SSLContext sslContext = new SSLContextBuilder().loadTrustMaterial(null, new TrustSelfSignedStrategy())
+				HttpClientBuilder builder = HttpClients.custom();
-						.build();
+				builder.setConnectionManager(createConnectionManager(readTimeout, ssl));
-				SSLConnectionSocketFactory socketFactory = SSLConnectionSocketFactoryBuilder.create()
+				builder.setDefaultRequestConfig(createRequestConfig());
-						.setSslContext(sslContext).setTlsVersions(TLS.V_1_3, TLS.V_1_2).build();
+				return builder.build();
-				PoolingHttpClientConnectionManager connectionManager = PoolingHttpClientConnectionManagerBuilder
-						.create().setSSLSocketFactory(socketFactory).build();
-
-				return HttpClients.custom().setConnectionManager(connectionManager)
-						.setDefaultRequestConfig(getRequestConfig()).build();
 			}
 			catch (Exception ex) {
-				throw new IllegalStateException("Unable to create SSL HttpClient", ex);
+				throw new IllegalStateException("Unable to create customized HttpClient", ex);
+			}
+		}
+
+		private PoolingHttpClientConnectionManager createConnectionManager(Duration readTimeout, boolean ssl)
+				throws NoSuchAlgorithmException, KeyManagementException, KeyStoreException {
+			PoolingHttpClientConnectionManagerBuilder builder = PoolingHttpClientConnectionManagerBuilder.create();
+			if (ssl) {
+				builder.setSSLSocketFactory(createSocketFactory());
+			}
+			if (readTimeout != null) {
+				SocketConfig socketConfig = SocketConfig.custom()
+						.setSoTimeout((int) readTimeout.toMillis(), TimeUnit.MILLISECONDS).build();
+				builder.setDefaultSocketConfig(socketConfig);
 			}
+			return builder.build();
+		}
+
+		private SSLConnectionSocketFactory createSocketFactory()
+				throws NoSuchAlgorithmException, KeyManagementException, KeyStoreException {
+			SSLContext sslContext = new SSLContextBuilder().loadTrustMaterial(null, new TrustSelfSignedStrategy())
+					.build();
+			return SSLConnectionSocketFactoryBuilder.create().setSslContext(sslContext)
+					.setTlsVersions(TLS.V_1_3, TLS.V_1_2).build();
 		}
 
 		@Override
 		protected HttpContext createHttpContext(HttpMethod httpMethod, URI uri) {
 			HttpClientContext context = HttpClientContext.create();
-			context.setRequestConfig(getRequestConfig());
+			context.setRequestConfig(createRequestConfig());
 			return context;
 		}
 
-		protected RequestConfig getRequestConfig() {
+		protected RequestConfig createRequestConfig() {
-			return RequestConfig.custom().setCookieSpec(this.cookieSpec).setAuthenticationEnabled(false)
+			RequestConfig.Builder builder = RequestConfig.custom();
-					.setRedirectsEnabled(this.enableRedirects).build();
+			builder.setCookieSpec(this.cookieSpec);
+			builder.setAuthenticationEnabled(false);
+			builder.setRedirectsEnabled(this.enableRedirects);
+			return builder.build();
 		}
 
 	}

spring-boot-project/spring-boot-test/src/test/java/org/springframework/boot/test/web/client/TestRestTemplateTests.java

@@ -134,7 +134,7 @@ class TestRestTemplateTests {
 		TestRestTemplate template = new TestRestTemplate(HttpClientOption.ENABLE_REDIRECTS);
 		CustomHttpComponentsClientHttpRequestFactory factory = (CustomHttpComponentsClientHttpRequestFactory) template
 				.getRestTemplate().getRequestFactory();
-		RequestConfig config = factory.getRequestConfig();
+		RequestConfig config = factory.createRequestConfig();
 		assertThat(config.isRedirectsEnabled()).isTrue();
 	}
 

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/client/ClientHttpRequestFactories.java

@@ -0,0 +1,264 @@
+/*
+ * Copyright 2012-2022 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.boot.web.client;
+
+import java.lang.reflect.Constructor;
+import java.lang.reflect.Field;
+import java.lang.reflect.Method;
+import java.time.Duration;
+import java.util.concurrent.TimeUnit;
+import java.util.function.Supplier;
+
+import org.apache.hc.client5.http.classic.HttpClient;
+import org.apache.hc.client5.http.impl.classic.HttpClientBuilder;
+import org.apache.hc.client5.http.impl.io.PoolingHttpClientConnectionManager;
+import org.apache.hc.client5.http.impl.io.PoolingHttpClientConnectionManagerBuilder;
+import org.apache.hc.core5.http.io.SocketConfig;
+
+import org.springframework.boot.context.properties.PropertyMapper;
+import org.springframework.http.client.AbstractClientHttpRequestFactoryWrapper;
+import org.springframework.http.client.ClientHttpRequestFactory;
+import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
+import org.springframework.http.client.OkHttp3ClientHttpRequestFactory;
+import org.springframework.http.client.SimpleClientHttpRequestFactory;
+import org.springframework.util.Assert;
+import org.springframework.util.ClassUtils;
+import org.springframework.util.ReflectionUtils;
+
+/**
+ * Utility class that can be used to create {@link ClientHttpRequestFactory} instances
+ * configured using given {@link ClientHttpRequestFactorySettings}.
+ *
+ * @author Andy Wilkinson
+ * @author Phillip Webb
+ * @since 3.0.0
+ */
+public final class ClientHttpRequestFactories {
+
+	static final String APACHE_HTTP_CLIENT_CLASS = "org.apache.hc.client5.http.impl.classic.HttpClients";
+
+	private static final boolean APACHE_HTTP_CLIENT_PRESENT = ClassUtils.isPresent(APACHE_HTTP_CLIENT_CLASS, null);
+
+	static final String OKHTTP_CLIENT_CLASS = "okhttp3.OkHttpClient";
+
+	private static final boolean OKHTTP_CLIENT_PRESENT = ClassUtils.isPresent(OKHTTP_CLIENT_CLASS, null);
+
+	private ClientHttpRequestFactories() {
+	}
+
+	/**
+	 * Return a new {@link ClientHttpRequestFactory} instance using the most appropriate
+	 * implementation.
+	 * @param settings the settings to apply
+	 * @return a new {@link ClientHttpRequestFactory}
+	 */
+	public static ClientHttpRequestFactory get(ClientHttpRequestFactorySettings settings) {
+		Assert.notNull(settings, "Settings must not be null");
+		if (APACHE_HTTP_CLIENT_PRESENT) {
+			return HttpComponents.get(settings);
+		}
+		if (OKHTTP_CLIENT_PRESENT) {
+			return OkHttp.get(settings);
+		}
+		return Simple.get(settings);
+	}
+
+	/**
+	 * Return a new {@link ClientHttpRequestFactory} of the given type, applying
+	 * {@link ClientHttpRequestFactorySettings} using reflection if necessary.
+	 * @param <T> the {@link ClientHttpRequestFactory} type
+	 * @param requestFactoryType the {@link ClientHttpRequestFactory} type
+	 * @param settings the settings to apply
+	 * @return a new {@link ClientHttpRequestFactory} instance
+	 */
+	@SuppressWarnings("unchecked")
+	public static <T extends ClientHttpRequestFactory> T get(Class<T> requestFactoryType,
+			ClientHttpRequestFactorySettings settings) {
+		Assert.notNull(settings, "Settings must not be null");
+		if (requestFactoryType == ClientHttpRequestFactory.class) {
+			return (T) get(settings);
+		}
+		if (requestFactoryType == HttpComponentsClientHttpRequestFactory.class) {
+			return (T) HttpComponents.get(settings);
+		}
+		if (requestFactoryType == OkHttp3ClientHttpRequestFactory.class) {
+			return (T) OkHttp.get(settings);
+		}
+		if (requestFactoryType == SimpleClientHttpRequestFactory.class) {
+			return (T) Simple.get(settings);
+		}
+		return get(() -> createRequestFactory(requestFactoryType), settings);
+	}
+
+	/**
+	 * Return a new {@link ClientHttpRequestFactory} from the given supplier, applying
+	 * {@link ClientHttpRequestFactorySettings} using reflection.
+	 * @param <T> the {@link ClientHttpRequestFactory} type
+	 * @param requestFactorySupplier the {@link ClientHttpRequestFactory} supplier
+	 * @param settings the settings to apply
+	 * @return a new {@link ClientHttpRequestFactory} instance
+	 */
+	public static <T extends ClientHttpRequestFactory> T get(Supplier<T> requestFactorySupplier,
+			ClientHttpRequestFactorySettings settings) {
+		return Reflective.get(requestFactorySupplier, settings);
+	}
+
+	private static <T extends ClientHttpRequestFactory> T createRequestFactory(Class<T> requestFactory) {
+		try {
+			Constructor<T> constructor = requestFactory.getDeclaredConstructor();
+			constructor.setAccessible(true);
+			return constructor.newInstance();
+		}
+		catch (Exception ex) {
+			throw new IllegalStateException(ex);
+		}
+	}
+
+	/**
+	 * Support for {@link HttpComponentsClientHttpRequestFactory}.
+	 */
+	static class HttpComponents {
+
+		static HttpComponentsClientHttpRequestFactory get(ClientHttpRequestFactorySettings settings) {
+			HttpComponentsClientHttpRequestFactory requestFactory = createRequestFactory(settings.readTimeout());
+			PropertyMapper map = PropertyMapper.get().alwaysApplyingWhenNonNull();
+			map.from(settings::connectTimeout).asInt(Duration::toMillis).to(requestFactory::setConnectTimeout);
+			map.from(settings::bufferRequestBody).to(requestFactory::setBufferRequestBody);
+			return requestFactory;
+		}
+
+		private static HttpComponentsClientHttpRequestFactory createRequestFactory(Duration readTimeout) {
+			return (readTimeout != null) ? new HttpComponentsClientHttpRequestFactory(createHttpClient(readTimeout))
+					: new HttpComponentsClientHttpRequestFactory();
+		}
+
+		private static HttpClient createHttpClient(Duration readTimeout) {
+			SocketConfig socketConfig = SocketConfig.custom()
+					.setSoTimeout((int) readTimeout.toMillis(), TimeUnit.MILLISECONDS).build();
+			PoolingHttpClientConnectionManager connectionManager = PoolingHttpClientConnectionManagerBuilder.create()
+					.setDefaultSocketConfig(socketConfig).build();
+			return HttpClientBuilder.create().setConnectionManager(connectionManager).build();
+		}
+
+	}
+
+	/**
+	 * Support for {@link OkHttp3ClientHttpRequestFactory}.
+	 */
+	static class OkHttp {
+
+		static OkHttp3ClientHttpRequestFactory get(ClientHttpRequestFactorySettings settings) {
+			Assert.state(settings.bufferRequestBody() == null,
+					() -> "OkHttp3ClientHttpRequestFactory does not support request body buffering");
+			OkHttp3ClientHttpRequestFactory requestFactory = new OkHttp3ClientHttpRequestFactory();
+			PropertyMapper map = PropertyMapper.get().alwaysApplyingWhenNonNull();
+			map.from(settings::connectTimeout).asInt(Duration::toMillis).to(requestFactory::setConnectTimeout);
+			map.from(settings::readTimeout).asInt(Duration::toMillis).to(requestFactory::setReadTimeout);
+			return requestFactory;
+		}
+
+	}
+
+	/**
+	 * Support for {@link SimpleClientHttpRequestFactory}.
+	 */
+	static class Simple {
+
+		static SimpleClientHttpRequestFactory get(ClientHttpRequestFactorySettings settings) {
+			SimpleClientHttpRequestFactory requestFactory = new SimpleClientHttpRequestFactory();
+			PropertyMapper map = PropertyMapper.get().alwaysApplyingWhenNonNull();
+			map.from(settings::readTimeout).asInt(Duration::toMillis).to(requestFactory::setReadTimeout);
+			map.from(settings::connectTimeout).asInt(Duration::toMillis).to(requestFactory::setConnectTimeout);
+			map.from(settings::bufferRequestBody).to(requestFactory::setBufferRequestBody);
+			return requestFactory;
+		}
+
+	}
+
+	/**
+	 * Support for reflective configuration of an unknown {@link ClientHttpRequestFactory}
+	 * implementation.
+	 */
+	static class Reflective {
+
+		static <T extends ClientHttpRequestFactory> T get(Supplier<T> requestFactorySupplier,
+				ClientHttpRequestFactorySettings settings) {
+			T requestFactory = requestFactorySupplier.get();
+			configure(requestFactory, settings);
+			return requestFactory;
+		}
+
+		private static void configure(ClientHttpRequestFactory requestFactory,
+				ClientHttpRequestFactorySettings settings) {
+			ClientHttpRequestFactory unwrapped = unwrapRequestFactoryIfNecessary(requestFactory);
+			PropertyMapper map = PropertyMapper.get().alwaysApplyingWhenNonNull();
+			map.from(settings::connectTimeout).to((connectTimeout) -> setConnectTimeout(unwrapped, connectTimeout));
+			map.from(settings::readTimeout).to((readTimeout) -> setReadTimeout(unwrapped, readTimeout));
+			map.from(settings::bufferRequestBody)
+					.to((bufferRequestBody) -> setBufferRequestBody(unwrapped, bufferRequestBody));
+		}
+
+		private static ClientHttpRequestFactory unwrapRequestFactoryIfNecessary(
+				ClientHttpRequestFactory requestFactory) {
+			if (!(requestFactory instanceof AbstractClientHttpRequestFactoryWrapper)) {
+				return requestFactory;
+			}
+			Field field = ReflectionUtils.findField(AbstractClientHttpRequestFactoryWrapper.class, "requestFactory");
+			ReflectionUtils.makeAccessible(field);
+			ClientHttpRequestFactory unwrappedRequestFactory = requestFactory;
+			while (unwrappedRequestFactory instanceof AbstractClientHttpRequestFactoryWrapper) {
+				unwrappedRequestFactory = (ClientHttpRequestFactory) ReflectionUtils.getField(field,
+						unwrappedRequestFactory);
+			}
+			return unwrappedRequestFactory;
+		}
+
+		private static void setConnectTimeout(ClientHttpRequestFactory factory, Duration connectTimeout) {
+			Method method = findMethod(factory, "setConnectTimeout", int.class);
+			int timeout = Math.toIntExact(connectTimeout.toMillis());
+			invoke(factory, method, timeout);
+		}
+
+		private static void setReadTimeout(ClientHttpRequestFactory factory, Duration readTimeout) {
+			Method method = findMethod(factory, "setReadTimeout", int.class);
+			int timeout = Math.toIntExact(readTimeout.toMillis());
+			invoke(factory, method, timeout);
+		}
+
+		private static void setBufferRequestBody(ClientHttpRequestFactory factory, boolean bufferRequestBody) {
+			Method method = findMethod(factory, "setBufferRequestBody", boolean.class);
+			invoke(factory, method, bufferRequestBody);
+		}
+
+		private static Method findMethod(ClientHttpRequestFactory requestFactory, String methodName,
+				Class<?>... parameters) {
+			Method method = ReflectionUtils.findMethod(requestFactory.getClass(), methodName, parameters);
+			Assert.state(method != null, () -> "Request factory %s does not have a suitable %s method"
+					.formatted(requestFactory.getClass().getName(), methodName));
+			Assert.state(!method.isAnnotationPresent(Deprecated.class),
+					() -> "Request factory %s has the %s method marked as deprecated"
+							.formatted(requestFactory.getClass().getName(), methodName));
+			return method;
+		}
+
+		private static void invoke(ClientHttpRequestFactory requestFactory, Method method, Object... parameters) {
+			ReflectionUtils.invokeMethod(method, requestFactory, parameters);
+		}
+
+	}
+
+}

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/client/ClientHttpRequestFactoriesRuntimeHints.java

@@ -0,0 +1,92 @@
+/*
+ * Copyright 2012-2022 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.boot.web.client;
+
+import java.lang.reflect.Field;
+import java.net.HttpURLConnection;
+import java.util.function.Consumer;
+
+import org.springframework.aot.hint.ExecutableMode;
+import org.springframework.aot.hint.ReflectionHints;
+import org.springframework.aot.hint.RuntimeHints;
+import org.springframework.aot.hint.RuntimeHintsRegistrar;
+import org.springframework.aot.hint.TypeHint;
+import org.springframework.aot.hint.TypeReference;
+import org.springframework.http.client.AbstractClientHttpRequestFactoryWrapper;
+import org.springframework.http.client.ClientHttpRequestFactory;
+import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
+import org.springframework.http.client.OkHttp3ClientHttpRequestFactory;
+import org.springframework.http.client.SimpleClientHttpRequestFactory;
+import org.springframework.util.Assert;
+import org.springframework.util.ClassUtils;
+import org.springframework.util.ReflectionUtils;
+
+/**
+ * {@link RuntimeHintsRegistrar} for {@link ClientHttpRequestFactories}.
+ *
+ * @author Andy Wilkinson
+ * @author Phillip Webb
+ */
+class ClientHttpRequestFactoriesRuntimeHints implements RuntimeHintsRegistrar {
+
+	@Override
+	public void registerHints(RuntimeHints hints, ClassLoader classLoader) {
+		if (ClassUtils.isPresent("org.springframework.http.client.ClientHttpRequestFactory", classLoader)) {
+			registerHints(hints.reflection(), classLoader);
+		}
+	}
+
+	private void registerHints(ReflectionHints hints, ClassLoader classLoader) {
+		hints.registerField(findField(AbstractClientHttpRequestFactoryWrapper.class, "requestFactory"));
+		if (ClassUtils.isPresent(ClientHttpRequestFactories.APACHE_HTTP_CLIENT_CLASS, classLoader)) {
+			registerReflectionHints(hints, HttpComponentsClientHttpRequestFactory.class, this::onReachableHttpClient);
+		}
+		if (ClassUtils.isPresent(ClientHttpRequestFactories.OKHTTP_CLIENT_CLASS, classLoader)) {
+			registerReflectionHints(hints, OkHttp3ClientHttpRequestFactory.class, this::onReachableOkHttpClient);
+		}
+		registerReflectionHints(hints, SimpleClientHttpRequestFactory.class, this::onReachableHttpUrlConnection);
+	}
+
+	private void onReachableHttpUrlConnection(TypeHint.Builder typeHint) {
+		typeHint.onReachableType(HttpURLConnection.class);
+	}
+
+	private void onReachableHttpClient(TypeHint.Builder typeHint) {
+		typeHint.onReachableType(TypeReference.of(ClientHttpRequestFactories.APACHE_HTTP_CLIENT_CLASS));
+	}
+
+	private void onReachableOkHttpClient(TypeHint.Builder typeHint) {
+		typeHint.onReachableType(TypeReference.of(ClientHttpRequestFactories.OKHTTP_CLIENT_CLASS));
+	}
+
+	private void registerReflectionHints(ReflectionHints hints,
+			Class<? extends ClientHttpRequestFactory> requestFactoryType, Consumer<TypeHint.Builder> hintCustomizer) {
+		hints.registerType(requestFactoryType, (typeHint) -> {
+			typeHint.withMethod("setConnectTimeout", TypeReference.listOf(int.class), ExecutableMode.INVOKE);
+			typeHint.withMethod("setReadTimeout", TypeReference.listOf(int.class), ExecutableMode.INVOKE);
+			typeHint.withMethod("setBufferRequestBody", TypeReference.listOf(boolean.class), ExecutableMode.INVOKE);
+			hintCustomizer.accept(typeHint);
+		});
+	}
+
+	private Field findField(Class<?> type, String name) {
+		Field field = ReflectionUtils.findField(type, name);
+		Assert.state(field != null, () -> "Unable to find field '%s' on %s".formatted(type.getName(), name));
+		return field;
+	}
+
+}

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/client/ClientHttpRequestFactorySettings.java

@@ -0,0 +1,74 @@
+/*
+ * Copyright 2012-2022 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.boot.web.client;
+
+import java.time.Duration;
+
+import org.springframework.http.client.ClientHttpRequestFactory;
+
+/**
+ * Settings that can be applied when creating a {@link ClientHttpRequestFactory}.
+ * @param connectTimeout the connect timeout
+ * @param readTimeout the read timeout
+ * @param bufferRequestBody if request body buffering is used
+ * @author Andy Wilkinson
+ * @author Phillip Webb
+ * @since 3.0.0
+ * @see ClientHttpRequestFactories
+ */
+public record ClientHttpRequestFactorySettings(Duration connectTimeout, Duration readTimeout,
+		Boolean bufferRequestBody) {
+
+	/**
+	 * Use defaults for the {@link ClientHttpRequestFactory} which can differ depending on
+	 * the implementation.
+	 */
+	public static final ClientHttpRequestFactorySettings DEFAULTS = new ClientHttpRequestFactorySettings(null, null,
+			null);
+
+	/**
+	 * Return a new {@link ClientHttpRequestFactorySettings} instance with an updated
+	 * connect timeout setting .
+	 * @param connectTimeout the new connect timeout setting
+	 * @return a new {@link ClientHttpRequestFactorySettings} instance
+	 */
+	public ClientHttpRequestFactorySettings withConnectTimeout(Duration connectTimeout) {
+		return new ClientHttpRequestFactorySettings(connectTimeout, this.readTimeout, this.bufferRequestBody);
+	}
+
+	/**
+	 * Return a new {@link ClientHttpRequestFactorySettings} instance with an updated read
+	 * timeout setting.
+	 * @param readTimeout the new read timeout setting
+	 * @return a new {@link ClientHttpRequestFactorySettings} instance
+	 */
+
+	public ClientHttpRequestFactorySettings withReadTimeout(Duration readTimeout) {
+		return new ClientHttpRequestFactorySettings(this.connectTimeout, readTimeout, this.bufferRequestBody);
+	}
+
+	/**
+	 * Return a new {@link ClientHttpRequestFactorySettings} instance with an updated
+	 * buffer request body setting.
+	 * @param bufferRequestBody the new buffer request body setting
+	 * @return a new {@link ClientHttpRequestFactorySettings} instance
+	 */
+	public ClientHttpRequestFactorySettings withBufferRequestBody(Boolean bufferRequestBody) {
+		return new ClientHttpRequestFactorySettings(this.connectTimeout, this.readTimeout, bufferRequestBody);
+	}
+
+}

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/client/ClientHttpRequestFactorySupplier.java

@@ -16,17 +16,9 @@
 
 package org.springframework.boot.web.client;
 
-import java.util.function.Consumer;
 import java.util.function.Supplier;
 
-import org.springframework.aot.hint.RuntimeHints;
-import org.springframework.aot.hint.TypeHint.Builder;
-import org.springframework.aot.hint.TypeReference;
 import org.springframework.http.client.ClientHttpRequestFactory;
-import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
-import org.springframework.http.client.OkHttp3ClientHttpRequestFactory;
-import org.springframework.http.client.SimpleClientHttpRequestFactory;
-import org.springframework.util.ClassUtils;
 
 /**
  * A supplier for {@link ClientHttpRequestFactory} that detects the preferred candidate
@@ -35,43 +27,15 @@ import org.springframework.util.ClassUtils;
  * @author Stephane Nicoll
  * @author Moritz Halbritter
  * @since 2.1.0
+ * @deprecated since 3.0.0 for removal in 3.2.0 in favor of
+ * {@link ClientHttpRequestFactories}
  */
+@Deprecated(since = "3.0.0", forRemoval = true)
 public class ClientHttpRequestFactorySupplier implements Supplier<ClientHttpRequestFactory> {
 
-	private static final String APACHE_HTTP_CLIENT_CLASS = "org.apache.hc.client5.http.impl.classic.HttpClients";
-
-	private static final boolean APACHE_HTTP_CLIENT_PRESENT = ClassUtils.isPresent(APACHE_HTTP_CLIENT_CLASS, null);
-
-	private static final String OKHTTP_CLIENT_CLASS = "okhttp3.OkHttpClient";
-
-	private static final boolean OKHTTP_CLIENT_PRESENT = ClassUtils.isPresent(OKHTTP_CLIENT_CLASS, null);
-
 	@Override
 	public ClientHttpRequestFactory get() {
-		if (APACHE_HTTP_CLIENT_PRESENT) {
+		return ClientHttpRequestFactories.get(ClientHttpRequestFactorySettings.DEFAULTS);
-			return new HttpComponentsClientHttpRequestFactory();
-		}
-		if (OKHTTP_CLIENT_PRESENT) {
-			return new OkHttp3ClientHttpRequestFactory();
-		}
-		return new SimpleClientHttpRequestFactory();
-	}
-
-	static class ClientHttpRequestFactorySupplierRuntimeHints {
-
-		static void registerHints(RuntimeHints hints, ClassLoader classLoader, Consumer<Builder> callback) {
-			if (ClassUtils.isPresent(APACHE_HTTP_CLIENT_CLASS, classLoader)) {
-				hints.reflection().registerType(HttpComponentsClientHttpRequestFactory.class, (typeHint) -> callback
-						.accept(typeHint.onReachableType(TypeReference.of(APACHE_HTTP_CLIENT_CLASS))));
-			}
-			if (ClassUtils.isPresent(OKHTTP_CLIENT_CLASS, classLoader)) {
-				hints.reflection().registerType(OkHttp3ClientHttpRequestFactory.class,
-						(typeHint) -> callback.accept(typeHint.onReachableType(TypeReference.of(OKHTTP_CLIENT_CLASS))));
-			}
-			hints.reflection().registerType(SimpleClientHttpRequestFactory.class, (typeHint) -> callback
-					.accept(typeHint.onReachableType(TypeReference.of(SimpleClientHttpRequestFactory.class))));
-		}
-
 	}
 
 }

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/client/RestTemplateBuilder.java

@@ -16,9 +16,6 @@
 
 package org.springframework.boot.web.client;
 
-import java.lang.reflect.Constructor;
-import java.lang.reflect.Field;
-import java.lang.reflect.Method;
 import java.nio.charset.Charset;
 import java.time.Duration;
 import java.util.ArrayList;
@@ -29,20 +26,13 @@ import java.util.LinkedHashMap;
 import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.Map;
-import java.util.Objects;
 import java.util.Set;
-import java.util.function.Consumer;
+import java.util.function.Function;
 import java.util.function.Supplier;
 
 import reactor.netty.http.client.HttpClientRequest;
 
-import org.springframework.aot.hint.ExecutableMode;
-import org.springframework.aot.hint.RuntimeHints;
-import org.springframework.aot.hint.RuntimeHintsRegistrar;
-import org.springframework.aot.hint.TypeReference;
 import org.springframework.beans.BeanUtils;
-import org.springframework.context.annotation.ImportRuntimeHints;
-import org.springframework.http.client.AbstractClientHttpRequestFactoryWrapper;
 import org.springframework.http.client.ClientHttpRequest;
 import org.springframework.http.client.ClientHttpRequestFactory;
 import org.springframework.http.client.ClientHttpRequestInterceptor;
@@ -51,7 +41,6 @@ import org.springframework.http.client.SimpleClientHttpRequestFactory;
 import org.springframework.http.converter.HttpMessageConverter;
 import org.springframework.util.Assert;
 import org.springframework.util.CollectionUtils;
-import org.springframework.util.ReflectionUtils;
 import org.springframework.web.client.ResponseErrorHandler;
 import org.springframework.web.client.RestTemplate;
 import org.springframework.web.util.UriTemplateHandler;
@@ -77,10 +66,9 @@ import org.springframework.web.util.UriTemplateHandler;
  * @author Ilya Lukyanovich
  * @since 1.4.0
  */
-@ImportRuntimeHints(RestTemplateBuilder.RestTemplateBuilderRuntimeHints.class)
 public class RestTemplateBuilder {
 
-	private final RequestFactoryCustomizer requestFactoryCustomizer;
+	private final ClientHttpRequestFactorySettings requestFactorySettings;
 
 	private final boolean detectRequestFactory;
 
@@ -90,7 +78,7 @@ public class RestTemplateBuilder {
 
 	private final Set<ClientHttpRequestInterceptor> interceptors;
 
-	private final Supplier<ClientHttpRequestFactory> requestFactory;
+	private final Function<ClientHttpRequestFactorySettings, ClientHttpRequestFactory> requestFactory;
 
 	private final UriTemplateHandler uriTemplateHandler;
 
@@ -111,7 +99,7 @@ public class RestTemplateBuilder {
 	 */
 	public RestTemplateBuilder(RestTemplateCustomizer... customizers) {
 		Assert.notNull(customizers, "Customizers must not be null");
-		this.requestFactoryCustomizer = new RequestFactoryCustomizer();
+		this.requestFactorySettings = ClientHttpRequestFactorySettings.DEFAULTS;
 		this.detectRequestFactory = true;
 		this.rootUri = null;
 		this.messageConverters = null;
@@ -125,18 +113,19 @@ public class RestTemplateBuilder {
 		this.requestCustomizers = Collections.emptySet();
 	}
 
-	private RestTemplateBuilder(RequestFactoryCustomizer requestFactoryCustomizer, boolean detectRequestFactory,
+	private RestTemplateBuilder(ClientHttpRequestFactorySettings requestFactorySettings, boolean detectRequestFactory,
 			String rootUri, Set<HttpMessageConverter<?>> messageConverters,
-			Set<ClientHttpRequestInterceptor> interceptors, Supplier<ClientHttpRequestFactory> requestFactorySupplier,
+			Set<ClientHttpRequestInterceptor> interceptors,
+			Function<ClientHttpRequestFactorySettings, ClientHttpRequestFactory> requestFactory,
 			UriTemplateHandler uriTemplateHandler, ResponseErrorHandler errorHandler,
 			BasicAuthentication basicAuthentication, Map<String, List<String>> defaultHeaders,
 			Set<RestTemplateCustomizer> customizers, Set<RestTemplateRequestCustomizer<?>> requestCustomizers) {
-		this.requestFactoryCustomizer = requestFactoryCustomizer;
+		this.requestFactorySettings = requestFactorySettings;
 		this.detectRequestFactory = detectRequestFactory;
 		this.rootUri = rootUri;
 		this.messageConverters = messageConverters;
 		this.interceptors = interceptors;
-		this.requestFactory = requestFactorySupplier;
+		this.requestFactory = requestFactory;
 		this.uriTemplateHandler = uriTemplateHandler;
 		this.errorHandler = errorHandler;
 		this.basicAuthentication = basicAuthentication;
@@ -153,7 +142,7 @@ public class RestTemplateBuilder {
 	 * @return a new builder instance
 	 */
 	public RestTemplateBuilder detectRequestFactory(boolean detectRequestFactory) {
-		return new RestTemplateBuilder(this.requestFactoryCustomizer, detectRequestFactory, this.rootUri,
+		return new RestTemplateBuilder(this.requestFactorySettings, detectRequestFactory, this.rootUri,
 				this.messageConverters, this.interceptors, this.requestFactory, this.uriTemplateHandler,
 				this.errorHandler, this.basicAuthentication, this.defaultHeaders, this.customizers,
 				this.requestCustomizers);
@@ -169,7 +158,7 @@ public class RestTemplateBuilder {
 	 * @return a new builder instance
 	 */
 	public RestTemplateBuilder rootUri(String rootUri) {
-		return new RestTemplateBuilder(this.requestFactoryCustomizer, this.detectRequestFactory, rootUri,
+		return new RestTemplateBuilder(this.requestFactorySettings, this.detectRequestFactory, rootUri,
 				this.messageConverters, this.interceptors, this.requestFactory, this.uriTemplateHandler,
 				this.errorHandler, this.basicAuthentication, this.defaultHeaders, this.customizers,
 				this.requestCustomizers);
@@ -200,7 +189,7 @@ public class RestTemplateBuilder {
 	 */
 	public RestTemplateBuilder messageConverters(Collection<? extends HttpMessageConverter<?>> messageConverters) {
 		Assert.notNull(messageConverters, "MessageConverters must not be null");
-		return new RestTemplateBuilder(this.requestFactoryCustomizer, this.detectRequestFactory, this.rootUri,
+		return new RestTemplateBuilder(this.requestFactorySettings, this.detectRequestFactory, this.rootUri,
 				copiedSetOf(messageConverters), this.interceptors, this.requestFactory, this.uriTemplateHandler,
 				this.errorHandler, this.basicAuthentication, this.defaultHeaders, this.customizers,
 				this.requestCustomizers);
@@ -230,7 +219,7 @@ public class RestTemplateBuilder {
 	public RestTemplateBuilder additionalMessageConverters(
 			Collection<? extends HttpMessageConverter<?>> messageConverters) {
 		Assert.notNull(messageConverters, "MessageConverters must not be null");
-		return new RestTemplateBuilder(this.requestFactoryCustomizer, this.detectRequestFactory, this.rootUri,
+		return new RestTemplateBuilder(this.requestFactorySettings, this.detectRequestFactory, this.rootUri,
 				append(this.messageConverters, messageConverters), this.interceptors, this.requestFactory,
 				this.uriTemplateHandler, this.errorHandler, this.basicAuthentication, this.defaultHeaders,
 				this.customizers, this.requestCustomizers);
@@ -244,7 +233,7 @@ public class RestTemplateBuilder {
 	 * @see #messageConverters(HttpMessageConverter...)
 	 */
 	public RestTemplateBuilder defaultMessageConverters() {
-		return new RestTemplateBuilder(this.requestFactoryCustomizer, this.detectRequestFactory, this.rootUri,
+		return new RestTemplateBuilder(this.requestFactorySettings, this.detectRequestFactory, this.rootUri,
 				copiedSetOf(new RestTemplate().getMessageConverters()), this.interceptors, this.requestFactory,
 				this.uriTemplateHandler, this.errorHandler, this.basicAuthentication, this.defaultHeaders,
 				this.customizers, this.requestCustomizers);
@@ -275,7 +264,7 @@ public class RestTemplateBuilder {
 	 */
 	public RestTemplateBuilder interceptors(Collection<ClientHttpRequestInterceptor> interceptors) {
 		Assert.notNull(interceptors, "interceptors must not be null");
-		return new RestTemplateBuilder(this.requestFactoryCustomizer, this.detectRequestFactory, this.rootUri,
+		return new RestTemplateBuilder(this.requestFactorySettings, this.detectRequestFactory, this.rootUri,
 				this.messageConverters, copiedSetOf(interceptors), this.requestFactory, this.uriTemplateHandler,
 				this.errorHandler, this.basicAuthentication, this.defaultHeaders, this.customizers,
 				this.requestCustomizers);
@@ -304,7 +293,7 @@ public class RestTemplateBuilder {
 	 */
 	public RestTemplateBuilder additionalInterceptors(Collection<? extends ClientHttpRequestInterceptor> interceptors) {
 		Assert.notNull(interceptors, "interceptors must not be null");
-		return new RestTemplateBuilder(this.requestFactoryCustomizer, this.detectRequestFactory, this.rootUri,
+		return new RestTemplateBuilder(this.requestFactorySettings, this.detectRequestFactory, this.rootUri,
 				this.messageConverters, append(this.interceptors, interceptors), this.requestFactory,
 				this.uriTemplateHandler, this.errorHandler, this.basicAuthentication, this.defaultHeaders,
 				this.customizers, this.requestCustomizers);
@@ -313,37 +302,41 @@ public class RestTemplateBuilder {
 	/**
 	 * Set the {@link ClientHttpRequestFactory} class that should be used with the
 	 * {@link RestTemplate}.
-	 * @param requestFactory the request factory to use
+	 * @param requestFactoryType the request factory type to use
 	 * @return a new builder instance
 	 */
-	public RestTemplateBuilder requestFactory(Class<? extends ClientHttpRequestFactory> requestFactory) {
+	public RestTemplateBuilder requestFactory(Class<? extends ClientHttpRequestFactory> requestFactoryType) {
-		Assert.notNull(requestFactory, "RequestFactory must not be null");
+		Assert.notNull(requestFactoryType, "RequestFactoryType must not be null");
-		return requestFactory(() -> createRequestFactory(requestFactory));
+		return requestFactory((settings) -> ClientHttpRequestFactories.get(requestFactoryType, settings));
-	}
-
-	private ClientHttpRequestFactory createRequestFactory(Class<? extends ClientHttpRequestFactory> requestFactory) {
-		try {
-			Constructor<?> constructor = requestFactory.getDeclaredConstructor();
-			constructor.setAccessible(true);
-			return (ClientHttpRequestFactory) constructor.newInstance();
-		}
-		catch (Exception ex) {
-			throw new IllegalStateException(ex);
-		}
 	}
 
 	/**
 	 * Set the {@code Supplier} of {@link ClientHttpRequestFactory} that should be called
 	 * each time we {@link #build()} a new {@link RestTemplate} instance.
-	 * @param requestFactory the supplier for the request factory
+	 * @param requestFactorySupplier the supplier for the request factory
 	 * @return a new builder instance
 	 * @since 2.0.0
 	 */
-	public RestTemplateBuilder requestFactory(Supplier<ClientHttpRequestFactory> requestFactory) {
+	public RestTemplateBuilder requestFactory(Supplier<ClientHttpRequestFactory> requestFactorySupplier) {
-		Assert.notNull(requestFactory, "RequestFactory Supplier must not be null");
+		Assert.notNull(requestFactorySupplier, "RequestFactorySupplier must not be null");
-		return new RestTemplateBuilder(this.requestFactoryCustomizer, this.detectRequestFactory, this.rootUri,
+		return requestFactory((settings) -> ClientHttpRequestFactories.get(requestFactorySupplier, settings));
-				this.messageConverters, this.interceptors, requestFactory, this.uriTemplateHandler, this.errorHandler,
+	}
-				this.basicAuthentication, this.defaultHeaders, this.customizers, this.requestCustomizers);
+
+	/**
+	 * Set the {@link ClientHttpRequestFactorySupplier} that should be called each time we
+	 * {@link #build()} a new {@link RestTemplate} instance.
+	 * @param requestFactoryFunction the settings to request factory function
+	 * @return a new builder instance
+	 * @since 3.0.0
+	 * @see ClientHttpRequestFactories
+	 */
+	public RestTemplateBuilder requestFactory(
+			Function<ClientHttpRequestFactorySettings, ClientHttpRequestFactory> requestFactoryFunction) {
+		Assert.notNull(requestFactoryFunction, "RequestFactoryFunction must not be null");
+		return new RestTemplateBuilder(this.requestFactorySettings, this.detectRequestFactory, this.rootUri,
+				this.messageConverters, this.interceptors, requestFactoryFunction, this.uriTemplateHandler,
+				this.errorHandler, this.basicAuthentication, this.defaultHeaders, this.customizers,
+				this.requestCustomizers);
 	}
 
 	/**
@@ -354,7 +347,7 @@ public class RestTemplateBuilder {
 	 */
 	public RestTemplateBuilder uriTemplateHandler(UriTemplateHandler uriTemplateHandler) {
 		Assert.notNull(uriTemplateHandler, "UriTemplateHandler must not be null");
-		return new RestTemplateBuilder(this.requestFactoryCustomizer, this.detectRequestFactory, this.rootUri,
+		return new RestTemplateBuilder(this.requestFactorySettings, this.detectRequestFactory, this.rootUri,
 				this.messageConverters, this.interceptors, this.requestFactory, uriTemplateHandler, this.errorHandler,
 				this.basicAuthentication, this.defaultHeaders, this.customizers, this.requestCustomizers);
 	}
@@ -367,7 +360,7 @@ public class RestTemplateBuilder {
 	 */
 	public RestTemplateBuilder errorHandler(ResponseErrorHandler errorHandler) {
 		Assert.notNull(errorHandler, "ErrorHandler must not be null");
-		return new RestTemplateBuilder(this.requestFactoryCustomizer, this.detectRequestFactory, this.rootUri,
+		return new RestTemplateBuilder(this.requestFactorySettings, this.detectRequestFactory, this.rootUri,
 				this.messageConverters, this.interceptors, this.requestFactory, this.uriTemplateHandler, errorHandler,
 				this.basicAuthentication, this.defaultHeaders, this.customizers, this.requestCustomizers);
 	}
@@ -395,7 +388,7 @@ public class RestTemplateBuilder {
 	 * @since 2.2.0
 	 */
 	public RestTemplateBuilder basicAuthentication(String username, String password, Charset charset) {
-		return new RestTemplateBuilder(this.requestFactoryCustomizer, this.detectRequestFactory, this.rootUri,
+		return new RestTemplateBuilder(this.requestFactorySettings, this.detectRequestFactory, this.rootUri,
 				this.messageConverters, this.interceptors, this.requestFactory, this.uriTemplateHandler,
 				this.errorHandler, new BasicAuthentication(username, password, charset), this.defaultHeaders,
 				this.customizers, this.requestCustomizers);
@@ -412,7 +405,7 @@ public class RestTemplateBuilder {
 	public RestTemplateBuilder defaultHeader(String name, String... values) {
 		Assert.notNull(name, "Name must not be null");
 		Assert.notNull(values, "Values must not be null");
-		return new RestTemplateBuilder(this.requestFactoryCustomizer, this.detectRequestFactory, this.rootUri,
+		return new RestTemplateBuilder(this.requestFactorySettings, this.detectRequestFactory, this.rootUri,
 				this.messageConverters, this.interceptors, this.requestFactory, this.uriTemplateHandler,
 				this.errorHandler, this.basicAuthentication, append(this.defaultHeaders, name, values),
 				this.customizers, this.requestCustomizers);
@@ -425,7 +418,7 @@ public class RestTemplateBuilder {
 	 * @since 2.1.0
 	 */
 	public RestTemplateBuilder setConnectTimeout(Duration connectTimeout) {
-		return new RestTemplateBuilder(this.requestFactoryCustomizer.connectTimeout(connectTimeout),
+		return new RestTemplateBuilder(this.requestFactorySettings.withConnectTimeout(connectTimeout),
 				this.detectRequestFactory, this.rootUri, this.messageConverters, this.interceptors, this.requestFactory,
 				this.uriTemplateHandler, this.errorHandler, this.basicAuthentication, this.defaultHeaders,
 				this.customizers, this.requestCustomizers);
@@ -438,7 +431,7 @@ public class RestTemplateBuilder {
 	 * @since 2.1.0
 	 */
 	public RestTemplateBuilder setReadTimeout(Duration readTimeout) {
-		return new RestTemplateBuilder(this.requestFactoryCustomizer.readTimeout(readTimeout),
+		return new RestTemplateBuilder(this.requestFactorySettings.withReadTimeout(readTimeout),
 				this.detectRequestFactory, this.rootUri, this.messageConverters, this.interceptors, this.requestFactory,
 				this.uriTemplateHandler, this.errorHandler, this.basicAuthentication, this.defaultHeaders,
 				this.customizers, this.requestCustomizers);
@@ -454,7 +447,7 @@ public class RestTemplateBuilder {
 	 * @see HttpComponentsClientHttpRequestFactory#setBufferRequestBody(boolean)
 	 */
 	public RestTemplateBuilder setBufferRequestBody(boolean bufferRequestBody) {
-		return new RestTemplateBuilder(this.requestFactoryCustomizer.bufferRequestBody(bufferRequestBody),
+		return new RestTemplateBuilder(this.requestFactorySettings.withBufferRequestBody(bufferRequestBody),
 				this.detectRequestFactory, this.rootUri, this.messageConverters, this.interceptors, this.requestFactory,
 				this.uriTemplateHandler, this.errorHandler, this.basicAuthentication, this.defaultHeaders,
 				this.customizers, this.requestCustomizers);
@@ -485,7 +478,7 @@ public class RestTemplateBuilder {
 	 */
 	public RestTemplateBuilder customizers(Collection<? extends RestTemplateCustomizer> customizers) {
 		Assert.notNull(customizers, "Customizers must not be null");
-		return new RestTemplateBuilder(this.requestFactoryCustomizer, this.detectRequestFactory, this.rootUri,
+		return new RestTemplateBuilder(this.requestFactorySettings, this.detectRequestFactory, this.rootUri,
 				this.messageConverters, this.interceptors, this.requestFactory, this.uriTemplateHandler,
 				this.errorHandler, this.basicAuthentication, this.defaultHeaders, copiedSetOf(customizers),
 				this.requestCustomizers);
@@ -514,7 +507,7 @@ public class RestTemplateBuilder {
 	 */
 	public RestTemplateBuilder additionalCustomizers(Collection<? extends RestTemplateCustomizer> customizers) {
 		Assert.notNull(customizers, "RestTemplateCustomizers must not be null");
-		return new RestTemplateBuilder(this.requestFactoryCustomizer, this.detectRequestFactory, this.rootUri,
+		return new RestTemplateBuilder(this.requestFactorySettings, this.detectRequestFactory, this.rootUri,
 				this.messageConverters, this.interceptors, this.requestFactory, this.uriTemplateHandler,
 				this.errorHandler, this.basicAuthentication, this.defaultHeaders, append(this.customizers, customizers),
 				this.requestCustomizers);
@@ -548,7 +541,7 @@ public class RestTemplateBuilder {
 	public RestTemplateBuilder requestCustomizers(
 			Collection<? extends RestTemplateRequestCustomizer<?>> requestCustomizers) {
 		Assert.notNull(requestCustomizers, "RequestCustomizers must not be null");
-		return new RestTemplateBuilder(this.requestFactoryCustomizer, this.detectRequestFactory, this.rootUri,
+		return new RestTemplateBuilder(this.requestFactorySettings, this.detectRequestFactory, this.rootUri,
 				this.messageConverters, this.interceptors, this.requestFactory, this.uriTemplateHandler,
 				this.errorHandler, this.basicAuthentication, this.defaultHeaders, this.customizers,
 				copiedSetOf(requestCustomizers));
@@ -580,7 +573,7 @@ public class RestTemplateBuilder {
 	public RestTemplateBuilder additionalRequestCustomizers(
 			Collection<? extends RestTemplateRequestCustomizer<?>> requestCustomizers) {
 		Assert.notNull(requestCustomizers, "RequestCustomizers must not be null");
-		return new RestTemplateBuilder(this.requestFactoryCustomizer, this.detectRequestFactory, this.rootUri,
+		return new RestTemplateBuilder(this.requestFactorySettings, this.detectRequestFactory, this.rootUri,
 				this.messageConverters, this.interceptors, this.requestFactory, this.uriTemplateHandler,
 				this.errorHandler, this.basicAuthentication, this.defaultHeaders, this.customizers,
 				append(this.requestCustomizers, requestCustomizers));
@@ -651,19 +644,13 @@ public class RestTemplateBuilder {
 	 * @since 2.2.0
 	 */
 	public ClientHttpRequestFactory buildRequestFactory() {
-		ClientHttpRequestFactory requestFactory = null;
 		if (this.requestFactory != null) {
-			requestFactory = this.requestFactory.get();
+			return this.requestFactory.apply(this.requestFactorySettings);
 		}
-		else if (this.detectRequestFactory) {
+		if (this.detectRequestFactory) {
-			requestFactory = new ClientHttpRequestFactorySupplier().get();
+			return ClientHttpRequestFactories.get(this.requestFactorySettings);
 		}
-		if (requestFactory != null) {
+		return null;
-			if (this.requestFactoryCustomizer != null) {
-				this.requestFactoryCustomizer.accept(requestFactory);
-			}
-		}
-		return requestFactory;
 	}
 
 	private void addClientHttpRequestInitializer(RestTemplate restTemplate) {
@@ -703,118 +690,4 @@ public class RestTemplateBuilder {
 		return Collections.unmodifiableMap(result);
 	}
 
-	/**
-	 * Internal customizer used to apply {@link ClientHttpRequestFactory} settings.
-	 */
-	private static class RequestFactoryCustomizer implements Consumer<ClientHttpRequestFactory> {
-
-		private final Duration connectTimeout;
-
-		private final Duration readTimeout;
-
-		private final Boolean bufferRequestBody;
-
-		RequestFactoryCustomizer() {
-			this(null, null, null);
-		}
-
-		private RequestFactoryCustomizer(Duration connectTimeout, Duration readTimeout, Boolean bufferRequestBody) {
-			this.connectTimeout = connectTimeout;
-			this.readTimeout = readTimeout;
-			this.bufferRequestBody = bufferRequestBody;
-		}
-
-		RequestFactoryCustomizer connectTimeout(Duration connectTimeout) {
-			return new RequestFactoryCustomizer(connectTimeout, this.readTimeout, this.bufferRequestBody);
-		}
-
-		RequestFactoryCustomizer readTimeout(Duration readTimeout) {
-			return new RequestFactoryCustomizer(this.connectTimeout, readTimeout, this.bufferRequestBody);
-		}
-
-		RequestFactoryCustomizer bufferRequestBody(boolean bufferRequestBody) {
-			return new RequestFactoryCustomizer(this.connectTimeout, this.readTimeout, bufferRequestBody);
-		}
-
-		@Override
-		public void accept(ClientHttpRequestFactory requestFactory) {
-			ClientHttpRequestFactory unwrappedRequestFactory = unwrapRequestFactoryIfNecessary(requestFactory);
-			if (this.connectTimeout != null) {
-				setConnectTimeout(unwrappedRequestFactory);
-			}
-			if (this.readTimeout != null) {
-				setReadTimeout(unwrappedRequestFactory);
-			}
-			if (this.bufferRequestBody != null) {
-				setBufferRequestBody(unwrappedRequestFactory);
-			}
-		}
-
-		private ClientHttpRequestFactory unwrapRequestFactoryIfNecessary(ClientHttpRequestFactory requestFactory) {
-			if (!(requestFactory instanceof AbstractClientHttpRequestFactoryWrapper)) {
-				return requestFactory;
-			}
-			Field field = ReflectionUtils.findField(AbstractClientHttpRequestFactoryWrapper.class, "requestFactory");
-			ReflectionUtils.makeAccessible(field);
-			ClientHttpRequestFactory unwrappedRequestFactory = requestFactory;
-			while (unwrappedRequestFactory instanceof AbstractClientHttpRequestFactoryWrapper) {
-				unwrappedRequestFactory = (ClientHttpRequestFactory) ReflectionUtils.getField(field,
-						unwrappedRequestFactory);
-			}
-			return unwrappedRequestFactory;
-		}
-
-		private void setConnectTimeout(ClientHttpRequestFactory factory) {
-			Method method = findMethod(factory, "setConnectTimeout", int.class);
-			int timeout = Math.toIntExact(this.connectTimeout.toMillis());
-			invoke(factory, method, timeout);
-		}
-
-		private void setReadTimeout(ClientHttpRequestFactory factory) {
-			Method method = findMethod(factory, "setReadTimeout", int.class);
-			int timeout = Math.toIntExact(this.readTimeout.toMillis());
-			invoke(factory, method, timeout);
-		}
-
-		private void setBufferRequestBody(ClientHttpRequestFactory factory) {
-			Method method = findMethod(factory, "setBufferRequestBody", boolean.class);
-			invoke(factory, method, this.bufferRequestBody);
-		}
-
-		private Method findMethod(ClientHttpRequestFactory requestFactory, String methodName, Class<?>... parameters) {
-			Method method = ReflectionUtils.findMethod(requestFactory.getClass(), methodName, parameters);
-			if (method == null) {
-				throw new IllegalStateException("Request factory " + requestFactory.getClass()
-						+ " does not have a suitable " + methodName + " method");
-			}
-			else if (method.isAnnotationPresent(Deprecated.class)) {
-				throw new IllegalStateException("Request factory " + requestFactory.getClass() + " has the "
-						+ methodName + " method marked as deprecated");
-			}
-			return method;
-		}
-
-		private void invoke(ClientHttpRequestFactory requestFactory, Method method, Object... parameters) {
-			ReflectionUtils.invokeMethod(method, requestFactory, parameters);
-		}
-
-	}
-
-	static class RestTemplateBuilderRuntimeHints implements RuntimeHintsRegistrar {
-
-		@Override
-		public void registerHints(RuntimeHints hints, ClassLoader classLoader) {
-			hints.reflection().registerField(Objects.requireNonNull(
-					ReflectionUtils.findField(AbstractClientHttpRequestFactoryWrapper.class, "requestFactory")));
-			ClientHttpRequestFactorySupplier.ClientHttpRequestFactorySupplierRuntimeHints.registerHints(hints,
-					classLoader, (hint) -> {
-						hint.withMethod("setConnectTimeout", TypeReference.listOf(int.class), ExecutableMode.INVOKE);
-						hint.withMethod("setReadTimeout", TypeReference.listOf(int.class), ExecutableMode.INVOKE);
-						hint.withMethod("setBufferRequestBody", TypeReference.listOf(boolean.class),
-								ExecutableMode.INVOKE);
-					});
-		}
-
-	}
-
 }

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/webservices/client/HttpWebServiceMessageSenderBuilder.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2022 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,14 +16,14 @@
 
 package org.springframework.boot.webservices.client;
 
-import java.lang.reflect.Method;
 import java.time.Duration;
+import java.util.function.Function;
 import java.util.function.Supplier;
 
-import org.springframework.boot.web.client.ClientHttpRequestFactorySupplier;
+import org.springframework.boot.web.client.ClientHttpRequestFactories;
+import org.springframework.boot.web.client.ClientHttpRequestFactorySettings;
 import org.springframework.http.client.ClientHttpRequestFactory;
 import org.springframework.util.Assert;
-import org.springframework.util.ReflectionUtils;
 import org.springframework.ws.transport.WebServiceMessageSender;
 import org.springframework.ws.transport.http.ClientHttpRequestMessageSender;
 
@@ -40,7 +40,7 @@ public class HttpWebServiceMessageSenderBuilder {
 
 	private Duration readTimeout;
 
-	private Supplier<ClientHttpRequestFactory> requestFactorySupplier;
+	private Function<ClientHttpRequestFactorySettings, ClientHttpRequestFactory> requestFactory;
 
 	/**
 	 * Set the connection timeout.
@@ -70,50 +70,39 @@ public class HttpWebServiceMessageSenderBuilder {
 	 */
 	public HttpWebServiceMessageSenderBuilder requestFactory(
 			Supplier<ClientHttpRequestFactory> requestFactorySupplier) {
-		Assert.notNull(requestFactorySupplier, "RequestFactory Supplier must not be null");
+		Assert.notNull(requestFactorySupplier, "RequestFactorySupplier must not be null");
-		this.requestFactorySupplier = requestFactorySupplier;
+		this.requestFactory = (settings) -> ClientHttpRequestFactories.get(requestFactorySupplier, settings);
 		return this;
 	}
 
-	public WebServiceMessageSender build() {
+	/**
-		ClientHttpRequestFactory requestFactory = (this.requestFactorySupplier != null)
+	 * Set the {@code Function} of {@link ClientHttpRequestFactorySettings} to
-				? this.requestFactorySupplier.get() : new ClientHttpRequestFactorySupplier().get();
+	 * {@link ClientHttpRequestFactory} that should be called to create the HTTP-based
-		if (this.connectTimeout != null) {
+	 * {@link WebServiceMessageSender}.
-			new TimeoutRequestFactoryCustomizer(this.connectTimeout, "setConnectTimeout").customize(requestFactory);
+	 * @param requestFactoryFunction the function for the request factory
-		}
+	 * @return a new builder instance
-		if (this.readTimeout != null) {
+	 * @since 3.0.0
-			new TimeoutRequestFactoryCustomizer(this.readTimeout, "setReadTimeout").customize(requestFactory);
+	 */
-		}
+	public HttpWebServiceMessageSenderBuilder requestFactory(
-		return new ClientHttpRequestMessageSender(requestFactory);
+			Function<ClientHttpRequestFactorySettings, ClientHttpRequestFactory> requestFactoryFunction) {
+		Assert.notNull(requestFactoryFunction, "RequestFactoryFunction must not be null");
+		this.requestFactory = requestFactoryFunction;
+		return this;
 	}
 
 	/**
-	 * {@link ClientHttpRequestFactory} customizer to call a "set timeout" method.
+	 * Build the {@link WebServiceMessageSender} instance.
+	 * @return the {@link WebServiceMessageSender} instance
 	 */
-	private static class TimeoutRequestFactoryCustomizer {
+	public WebServiceMessageSender build() {
-
+		return new ClientHttpRequestMessageSender(getRequestFactory());
-		private final Duration timeout;
+	}
-
-		private final String methodName;
-
-		TimeoutRequestFactoryCustomizer(Duration timeout, String methodName) {
-			this.timeout = timeout;
-			this.methodName = methodName;
-		}
-
-		void customize(ClientHttpRequestFactory factory) {
-			ReflectionUtils.invokeMethod(findMethod(factory), factory, Math.toIntExact(this.timeout.toMillis()));
-		}
-
-		private Method findMethod(ClientHttpRequestFactory factory) {
-			Method method = ReflectionUtils.findMethod(factory.getClass(), this.methodName, int.class);
-			if (method != null) {
-				return method;
-			}
-			throw new IllegalStateException(
-					"Request factory " + factory.getClass() + " does not have a " + this.methodName + "(int) method");
-		}
 
+	private ClientHttpRequestFactory getRequestFactory() {
+		ClientHttpRequestFactorySettings settings = new ClientHttpRequestFactorySettings(this.connectTimeout,
+				this.readTimeout, null);
+		return (this.requestFactory != null) ? this.requestFactory.apply(settings)
+				: ClientHttpRequestFactories.get(settings);
 	}
 
 }

spring-boot-project/spring-boot/src/main/resources/META-INF/spring/aot.factories

@@ -7,6 +7,7 @@ org.springframework.boot.env.PropertySourceRuntimeHints,\
 org.springframework.boot.json.JacksonRuntimeHints,\
 org.springframework.boot.logging.java.JavaLoggingSystemRuntimeHints,\
 org.springframework.boot.logging.logback.LogbackRuntimeHints,\
+org.springframework.boot.web.client.ClientHttpRequestFactoriesRuntimeHints,\
 org.springframework.boot.web.embedded.undertow.UndertowWebServer.UndertowWebServerRuntimeHints,\
 org.springframework.boot.web.server.MimeMappings.MimeMappingsRuntimeHints
 

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/context/properties/ConfigurationPropertiesBeanFactoryInitializationAotProcessorTests.java

@@ -40,6 +40,7 @@ import org.springframework.beans.factory.aot.BeanFactoryInitializationCode;
 import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
 import org.springframework.beans.factory.support.DefaultListableBeanFactory;
 import org.springframework.beans.factory.support.RootBeanDefinition;
+import org.springframework.boot.context.properties.bind.BindableRuntimeHintsRegistrar;
 import org.springframework.boot.context.properties.bind.ConstructorBinding;
 import org.springframework.context.ApplicationContext;
 import org.springframework.context.ApplicationContextAware;
@@ -50,7 +51,8 @@ import static org.assertj.core.api.Assertions.assertThat;
 import static org.mockito.Mockito.mock;
 
 /**
- * Tests for {@link ConfigurationPropertiesBeanFactoryInitializationAotProcessor}.
+ * Tests for {@link ConfigurationPropertiesBeanFactoryInitializationAotProcessor} and
+ * {@link BindableRuntimeHintsRegistrar}.
  *
  * @author Stephane Nicoll
  * @author Moritz Halbritter

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/web/client/AbstractClientHttpRequestFactoriesTests.java

@@ -0,0 +1,83 @@
+/*
+ * Copyright 2012-2022 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.boot.web.client;
+
+import java.time.Duration;
+
+import org.junit.jupiter.api.Test;
+
+import org.springframework.http.client.ClientHttpRequestFactory;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Base classes for testing of {@link ClientHttpRequestFactories} with different HTTP
+ * clients on the classpath.
+ *
+ * @param <T> the {@link ClientHttpRequestFactory} to be produced
+ * @author Andy Wilkinson
+ */
+abstract class AbstractClientHttpRequestFactoriesTests<T extends ClientHttpRequestFactory> {
+
+	private final Class<T> requestFactoryType;
+
+	protected AbstractClientHttpRequestFactoriesTests(Class<T> requestFactoryType) {
+		this.requestFactoryType = requestFactoryType;
+	}
+
+	@Test
+	void getReturnsRequestFactoryOfExpectedType() {
+		ClientHttpRequestFactory requestFactory = ClientHttpRequestFactories
+				.get(ClientHttpRequestFactorySettings.DEFAULTS);
+		assertThat(requestFactory).isInstanceOf(this.requestFactoryType);
+	}
+
+	@Test
+	void getOfGeneralTypeReturnsRequestFactoryOfExpectedType() {
+		ClientHttpRequestFactory requestFactory = ClientHttpRequestFactories.get(ClientHttpRequestFactory.class,
+				ClientHttpRequestFactorySettings.DEFAULTS);
+		assertThat(requestFactory).isInstanceOf(this.requestFactoryType);
+	}
+
+	@Test
+	void getOfSpecificTypeReturnsRequestFactoryOfExpectedType() {
+		ClientHttpRequestFactory requestFactory = ClientHttpRequestFactories.get(this.requestFactoryType,
+				ClientHttpRequestFactorySettings.DEFAULTS);
+		assertThat(requestFactory).isInstanceOf(this.requestFactoryType);
+	}
+
+	@Test
+	@SuppressWarnings("unchecked")
+	void getReturnsRequestFactoryWithConfiguredConnectTimeout() {
+		ClientHttpRequestFactory requestFactory = ClientHttpRequestFactories
+				.get(ClientHttpRequestFactorySettings.DEFAULTS.withConnectTimeout(Duration.ofSeconds(60)));
+		assertThat(connectTimeout((T) requestFactory)).isEqualTo(Duration.ofSeconds(60).toMillis());
+	}
+
+	@Test
+	@SuppressWarnings("unchecked")
+	void getReturnsRequestFactoryWithConfiguredReadTimeout() {
+		ClientHttpRequestFactory requestFactory = ClientHttpRequestFactories
+				.get(ClientHttpRequestFactorySettings.DEFAULTS.withReadTimeout(Duration.ofSeconds(120)));
+		assertThat(readTimeout((T) requestFactory)).isEqualTo(Duration.ofSeconds(120).toMillis());
+	}
+
+	protected abstract long connectTimeout(T requestFactory);
+
+	protected abstract long readTimeout(T requestFactory);
+
+}

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/web/client/AbstractRestTemplateBuilderRequestFactoryConfigurationTests.java

@@ -0,0 +1,80 @@
+/*
+ * Copyright 2012-2022 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.boot.web.client;
+
+import java.time.Duration;
+
+import org.junit.jupiter.api.Test;
+
+import org.springframework.http.client.ClientHttpRequestFactory;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Base class for tests that verify the configuration of the
+ * {@link ClientHttpRequestFactory} used by {@link RestTemplateBuilder}.
+ *
+ * @param <T> the request factory type under test
+ * @author Andy Wilkinson
+ */
+abstract class AbstractRestTemplateBuilderRequestFactoryConfigurationTests<T extends ClientHttpRequestFactory> {
+
+	private final Class<? extends ClientHttpRequestFactory> factoryType;
+
+	private final RestTemplateBuilder builder = new RestTemplateBuilder();
+
+	protected AbstractRestTemplateBuilderRequestFactoryConfigurationTests(Class<T> factoryType) {
+		this.factoryType = factoryType;
+	}
+
+	@Test
+	@SuppressWarnings("unchecked")
+	void connectTimeoutCanBeConfiguredOnFactory() {
+		ClientHttpRequestFactory requestFactory = this.builder.requestFactory(this.factoryType)
+				.setConnectTimeout(Duration.ofMillis(1234)).build().getRequestFactory();
+		assertThat(connectTimeout((T) requestFactory)).isEqualTo(1234);
+	}
+
+	@Test
+	@SuppressWarnings("unchecked")
+	void readTimeoutCanBeConfiguredOnFactory() {
+		ClientHttpRequestFactory requestFactory = this.builder.requestFactory(this.factoryType)
+				.setReadTimeout(Duration.ofMillis(1234)).build().getRequestFactory();
+		assertThat(readTimeout((T) requestFactory)).isEqualTo(1234);
+	}
+
+	@Test
+	@SuppressWarnings("unchecked")
+	void connectTimeoutCanBeConfiguredOnDetectedFactory() {
+		ClientHttpRequestFactory requestFactory = this.builder.setConnectTimeout(Duration.ofMillis(1234)).build()
+				.getRequestFactory();
+		assertThat(connectTimeout((T) requestFactory)).isEqualTo(1234);
+	}
+
+	@Test
+	@SuppressWarnings("unchecked")
+	void readTimeoutCanBeConfiguredOnDetectedFactory() {
+		ClientHttpRequestFactory requestFactory = this.builder.setReadTimeout(Duration.ofMillis(1234)).build()
+				.getRequestFactory();
+		assertThat(readTimeout((T) requestFactory)).isEqualTo(1234);
+	}
+
+	protected abstract long connectTimeout(T requestFactory);
+
+	protected abstract long readTimeout(T requestFactory);
+
+}

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/web/client/ClientHttpRequestFactoriesHttpComponentsTests.java

@@ -0,0 +1,52 @@
+/*
+ * Copyright 2012-2022 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.boot.web.client;
+
+import org.apache.hc.client5.http.classic.HttpClient;
+import org.apache.hc.core5.http.io.SocketConfig;
+
+import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
+import org.springframework.test.util.ReflectionTestUtils;
+
+/**
+ * Tests for {@link ClientHttpRequestFactories} when Apache Http Components is the
+ * predominant HTTP client.
+ *
+ * @author Andy Wilkinson
+ */
+class ClientHttpRequestFactoriesHttpComponentsTests
+		extends AbstractClientHttpRequestFactoriesTests<HttpComponentsClientHttpRequestFactory> {
+
+	ClientHttpRequestFactoriesHttpComponentsTests() {
+		super(HttpComponentsClientHttpRequestFactory.class);
+	}
+
+	@Override
+	protected long connectTimeout(HttpComponentsClientHttpRequestFactory requestFactory) {
+		return (int) ReflectionTestUtils.getField(requestFactory, "connectTimeout");
+	}
+
+	@Override
+	protected long readTimeout(HttpComponentsClientHttpRequestFactory requestFactory) {
+		HttpClient httpClient = requestFactory.getHttpClient();
+		Object connectionManager = ReflectionTestUtils.getField(httpClient, "connManager");
+		SocketConfig socketConfig = (SocketConfig) ReflectionTestUtils.getField(connectionManager,
+				"defaultSocketConfig");
+		return socketConfig.getSoTimeout().toMilliseconds();
+	}
+
+}

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/web/client/ClientHttpRequestFactoriesOkHttp3Tests.java

@@ -0,0 +1,69 @@
+/*
+ * Copyright 2012-2022 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.boot.web.client;
+
+import java.io.File;
+
+import okhttp3.OkHttpClient;
+import org.junit.jupiter.api.Test;
+
+import org.springframework.boot.testsupport.classpath.ClassPathExclusions;
+import org.springframework.boot.testsupport.classpath.ClassPathOverrides;
+import org.springframework.http.client.OkHttp3ClientHttpRequestFactory;
+import org.springframework.test.util.ReflectionTestUtils;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatIllegalStateException;
+
+/**
+ * Tests for {@link ClientHttpRequestFactories} when OkHttp 3 is the predominant HTTP
+ * client.
+ *
+ * @author Andy Wilkinson
+ */
+@ClassPathOverrides("com.squareup.okhttp3:okhttp:3.14.9")
+@ClassPathExclusions("httpclient5-*.jar")
+class ClientHttpRequestFactoriesOkHttp3Tests
+		extends AbstractClientHttpRequestFactoriesTests<OkHttp3ClientHttpRequestFactory> {
+
+	ClientHttpRequestFactoriesOkHttp3Tests() {
+		super(OkHttp3ClientHttpRequestFactory.class);
+	}
+
+	@Test
+	void okHttp3IsBeingUsed() {
+		assertThat(new File(OkHttpClient.class.getProtectionDomain().getCodeSource().getLocation().getFile()).getName())
+				.startsWith("okhttp-3.");
+	}
+
+	@Test
+	void getFailsWhenBufferRequestBodyIsEnabled() {
+		assertThatIllegalStateException().isThrownBy(() -> ClientHttpRequestFactories
+				.get(ClientHttpRequestFactorySettings.DEFAULTS.withBufferRequestBody(true)));
+	}
+
+	@Override
+	protected long connectTimeout(OkHttp3ClientHttpRequestFactory requestFactory) {
+		return ((OkHttpClient) ReflectionTestUtils.getField(requestFactory, "client")).connectTimeoutMillis();
+	}
+
+	@Override
+	protected long readTimeout(OkHttp3ClientHttpRequestFactory requestFactory) {
+		return ((OkHttpClient) ReflectionTestUtils.getField(requestFactory, "client")).readTimeoutMillis();
+	}
+
+}

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/web/client/ClientHttpRequestFactoriesOkHttp4Tests.java

@@ -0,0 +1,67 @@
+/*
+ * Copyright 2012-2022 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.boot.web.client;
+
+import java.io.File;
+
+import okhttp3.OkHttpClient;
+import org.junit.jupiter.api.Test;
+
+import org.springframework.boot.testsupport.classpath.ClassPathExclusions;
+import org.springframework.http.client.OkHttp3ClientHttpRequestFactory;
+import org.springframework.test.util.ReflectionTestUtils;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatIllegalStateException;
+
+/**
+ * Tests for {@link ClientHttpRequestFactories} when OkHttp 4 is the predominant HTTP
+ * client.
+ *
+ * @author Andy Wilkinson
+ */
+@ClassPathExclusions("httpclient5-*.jar")
+class ClientHttpRequestFactoriesOkHttp4Tests
+		extends AbstractClientHttpRequestFactoriesTests<OkHttp3ClientHttpRequestFactory> {
+
+	ClientHttpRequestFactoriesOkHttp4Tests() {
+		super(OkHttp3ClientHttpRequestFactory.class);
+	}
+
+	@Test
+	void okHttp4IsBeingUsed() {
+		assertThat(new File(OkHttpClient.class.getProtectionDomain().getCodeSource().getLocation().getFile()).getName())
+				.startsWith("okhttp-4.");
+	}
+
+	@Test
+	void getFailsWhenBufferRequestBodyIsEnabled() {
+		assertThatIllegalStateException().isThrownBy(() -> ClientHttpRequestFactories
+				.get(ClientHttpRequestFactorySettings.DEFAULTS.withBufferRequestBody(true)));
+	}
+
+	@Override
+	protected long connectTimeout(OkHttp3ClientHttpRequestFactory requestFactory) {
+		return ((OkHttpClient) ReflectionTestUtils.getField(requestFactory, "client")).connectTimeoutMillis();
+	}
+
+	@Override
+	protected long readTimeout(OkHttp3ClientHttpRequestFactory requestFactory) {
+		return ((OkHttpClient) ReflectionTestUtils.getField(requestFactory, "client")).readTimeoutMillis();
+	}
+
+}

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/web/client/ClientHttpRequestFactoriesRuntimeHintsTests.java

@@ -0,0 +1,91 @@
+/*
+ * Copyright 2012-2022 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.boot.web.client;
+
+import org.junit.jupiter.api.Test;
+
+import org.springframework.aot.hint.RuntimeHints;
+import org.springframework.aot.hint.predicate.ReflectionHintsPredicates;
+import org.springframework.aot.hint.predicate.RuntimeHintsPredicates;
+import org.springframework.http.client.AbstractClientHttpRequestFactoryWrapper;
+import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
+import org.springframework.http.client.OkHttp3ClientHttpRequestFactory;
+import org.springframework.http.client.SimpleClientHttpRequestFactory;
+import org.springframework.util.ReflectionUtils;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Tests for {@link ClientHttpRequestFactoriesRuntimeHints}.
+ *
+ * @author Andy Wilkinson
+ */
+public class ClientHttpRequestFactoriesRuntimeHintsTests {
+
+	@Test
+	void shouldRegisterHints() {
+		RuntimeHints hints = new RuntimeHints();
+		new ClientHttpRequestFactoriesRuntimeHints().registerHints(hints, getClass().getClassLoader());
+		ReflectionHintsPredicates reflection = RuntimeHintsPredicates.reflection();
+		assertThat(reflection
+				.onField(ReflectionUtils.findField(AbstractClientHttpRequestFactoryWrapper.class, "requestFactory")))
+						.accepts(hints);
+	}
+
+	@Test
+	void shouldRegisterHttpComponentHints() {
+		RuntimeHints hints = new RuntimeHints();
+		new ClientHttpRequestFactoriesRuntimeHints().registerHints(hints, getClass().getClassLoader());
+		ReflectionHintsPredicates reflection = RuntimeHintsPredicates.reflection();
+		assertThat(reflection.onMethod(ReflectionUtils.findMethod(HttpComponentsClientHttpRequestFactory.class,
+				"setConnectTimeout", int.class))).accepts(hints);
+		assertThat(reflection.onMethod(
+				ReflectionUtils.findMethod(HttpComponentsClientHttpRequestFactory.class, "setReadTimeout", int.class)))
+						.accepts(hints);
+		assertThat(reflection.onMethod(ReflectionUtils.findMethod(HttpComponentsClientHttpRequestFactory.class,
+				"setBufferRequestBody", boolean.class))).accepts(hints);
+	}
+
+	@Test
+	void shouldRegisterOkHttpHints() {
+		RuntimeHints hints = new RuntimeHints();
+		new ClientHttpRequestFactoriesRuntimeHints().registerHints(hints, getClass().getClassLoader());
+		ReflectionHintsPredicates reflection = RuntimeHintsPredicates.reflection();
+		assertThat(reflection.onMethod(
+				ReflectionUtils.findMethod(OkHttp3ClientHttpRequestFactory.class, "setConnectTimeout", int.class)))
+						.accepts(hints);
+		assertThat(reflection.onMethod(
+				ReflectionUtils.findMethod(OkHttp3ClientHttpRequestFactory.class, "setReadTimeout", int.class)))
+						.accepts(hints);
+	}
+
+	@Test
+	void shouldRegisterSimpleHttpHints() {
+		RuntimeHints hints = new RuntimeHints();
+		new ClientHttpRequestFactoriesRuntimeHints().registerHints(hints, getClass().getClassLoader());
+		ReflectionHintsPredicates reflection = RuntimeHintsPredicates.reflection();
+		assertThat(reflection.onMethod(
+				ReflectionUtils.findMethod(SimpleClientHttpRequestFactory.class, "setConnectTimeout", int.class)))
+						.accepts(hints);
+		assertThat(reflection.onMethod(
+				ReflectionUtils.findMethod(SimpleClientHttpRequestFactory.class, "setReadTimeout", int.class)))
+						.accepts(hints);
+		assertThat(reflection.onMethod(ReflectionUtils.findMethod(SimpleClientHttpRequestFactory.class,
+				"setBufferRequestBody", boolean.class))).accepts(hints);
+	}
+
+}

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/web/client/ClientHttpRequestFactoriesSimpleTests.java

@@ -0,0 +1,47 @@
+/*
+ * Copyright 2012-2022 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.boot.web.client;
+
+import org.springframework.boot.testsupport.classpath.ClassPathExclusions;
+import org.springframework.http.client.SimpleClientHttpRequestFactory;
+import org.springframework.test.util.ReflectionTestUtils;
+
+/**
+ * Tests for {@link ClientHttpRequestFactories} when the simple JDK-based client is the
+ * predominant HTTP client.
+ *
+ * @author Andy Wilkinson
+ */
+@ClassPathExclusions({ "httpclient5-*.jar", "okhttp-*.jar" })
+class ClientHttpRequestFactoriesSimpleTests
+		extends AbstractClientHttpRequestFactoriesTests<SimpleClientHttpRequestFactory> {
+
+	ClientHttpRequestFactoriesSimpleTests() {
+		super(SimpleClientHttpRequestFactory.class);
+	}
+
+	@Override
+	protected long connectTimeout(SimpleClientHttpRequestFactory requestFactory) {
+		return (int) ReflectionTestUtils.getField(requestFactory, "connectTimeout");
+	}
+
+	@Override
+	protected long readTimeout(SimpleClientHttpRequestFactory requestFactory) {
+		return (int) ReflectionTestUtils.getField(requestFactory, "readTimeout");
+	}
+
+}

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/web/client/ClientHttpRequestFactoriesTests.java

@@ -0,0 +1,247 @@
+/*
+ * Copyright 2012-2022 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.boot.web.client;
+
+import java.io.IOException;
+import java.net.URI;
+import java.time.Duration;
+
+import org.junit.jupiter.api.Test;
+
+import org.springframework.http.HttpMethod;
+import org.springframework.http.client.BufferingClientHttpRequestFactory;
+import org.springframework.http.client.ClientHttpRequest;
+import org.springframework.http.client.ClientHttpRequestFactory;
+import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
+import org.springframework.http.client.OkHttp3ClientHttpRequestFactory;
+import org.springframework.http.client.SimpleClientHttpRequestFactory;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatIllegalStateException;
+
+/**
+ * Tests for {@link ClientHttpRequestFactories}.
+ *
+ * @author Andy Wilkinson
+ */
+class ClientHttpRequestFactoriesTests {
+
+	@Test
+	void getReturnsRequestFactoryOfExpectedType() {
+		ClientHttpRequestFactory requestFactory = ClientHttpRequestFactories
+				.get(ClientHttpRequestFactorySettings.DEFAULTS);
+		assertThat(requestFactory).isInstanceOf(HttpComponentsClientHttpRequestFactory.class);
+	}
+
+	@Test
+	void getOfGeneralTypeReturnsRequestFactoryOfExpectedType() {
+		ClientHttpRequestFactory requestFactory = ClientHttpRequestFactories.get(ClientHttpRequestFactory.class,
+				ClientHttpRequestFactorySettings.DEFAULTS);
+		assertThat(requestFactory).isInstanceOf(HttpComponentsClientHttpRequestFactory.class);
+	}
+
+	@Test
+	void getOfSimpleFactoryReturnsSimpleFactory() {
+		ClientHttpRequestFactory requestFactory = ClientHttpRequestFactories.get(SimpleClientHttpRequestFactory.class,
+				ClientHttpRequestFactorySettings.DEFAULTS);
+		assertThat(requestFactory).isInstanceOf(SimpleClientHttpRequestFactory.class);
+	}
+
+	@Test
+	void getOfHttpComponentsFactoryReturnsHttpComponentsFactory() {
+		ClientHttpRequestFactory requestFactory = ClientHttpRequestFactories
+				.get(HttpComponentsClientHttpRequestFactory.class, ClientHttpRequestFactorySettings.DEFAULTS);
+		assertThat(requestFactory).isInstanceOf(HttpComponentsClientHttpRequestFactory.class);
+	}
+
+	@Test
+	void getOfOkHttpFactoryReturnsOkHttpFactory() {
+		ClientHttpRequestFactory requestFactory = ClientHttpRequestFactories.get(OkHttp3ClientHttpRequestFactory.class,
+				ClientHttpRequestFactorySettings.DEFAULTS);
+		assertThat(requestFactory).isInstanceOf(OkHttp3ClientHttpRequestFactory.class);
+	}
+
+	@Test
+	void getOfUnknownTypeCreatesFactory() {
+		ClientHttpRequestFactory requestFactory = ClientHttpRequestFactories.get(TestClientHttpRequestFactory.class,
+				ClientHttpRequestFactorySettings.DEFAULTS);
+		assertThat(requestFactory).isInstanceOf(TestClientHttpRequestFactory.class);
+	}
+
+	@Test
+	void getOfUnknownTypeWithConnectTimeoutCreatesFactoryAndConfiguresConnectTimeout() {
+		ClientHttpRequestFactory requestFactory = ClientHttpRequestFactories.get(TestClientHttpRequestFactory.class,
+				ClientHttpRequestFactorySettings.DEFAULTS.withConnectTimeout(Duration.ofSeconds(60)));
+		assertThat(requestFactory).isInstanceOf(TestClientHttpRequestFactory.class);
+		assertThat(((TestClientHttpRequestFactory) requestFactory).connectTimeout)
+				.isEqualTo(Duration.ofSeconds(60).toMillis());
+	}
+
+	@Test
+	void getOfUnknownTypeWithReadTimeoutCreatesFactoryAndConfiguresReadTimeout() {
+		ClientHttpRequestFactory requestFactory = ClientHttpRequestFactories.get(TestClientHttpRequestFactory.class,
+				ClientHttpRequestFactorySettings.DEFAULTS.withReadTimeout(Duration.ofSeconds(90)));
+		assertThat(requestFactory).isInstanceOf(TestClientHttpRequestFactory.class);
+		assertThat(((TestClientHttpRequestFactory) requestFactory).readTimeout)
+				.isEqualTo(Duration.ofSeconds(90).toMillis());
+	}
+
+	@Test
+	void getOfUnknownTypeWithBodyBufferingCreatesFactoryAndConfiguresBodyBuffering() {
+		ClientHttpRequestFactory requestFactory = ClientHttpRequestFactories.get(TestClientHttpRequestFactory.class,
+				ClientHttpRequestFactorySettings.DEFAULTS.withBufferRequestBody(true));
+		assertThat(requestFactory).isInstanceOf(TestClientHttpRequestFactory.class);
+		assertThat(((TestClientHttpRequestFactory) requestFactory).bufferRequestBody).isTrue();
+	}
+
+	@Test
+	void getOfUnconfigurableTypeWithConnectTimeoutThrows() {
+		assertThatIllegalStateException()
+				.isThrownBy(() -> ClientHttpRequestFactories.get(UnconfigurableClientHttpRequestFactory.class,
+						ClientHttpRequestFactorySettings.DEFAULTS.withConnectTimeout(Duration.ofSeconds(60))))
+				.withMessageContaining("suitable setConnectTimeout method");
+	}
+
+	@Test
+	void getOfUnconfigurableTypeWithReadTimeoutThrows() {
+		assertThatIllegalStateException()
+				.isThrownBy(() -> ClientHttpRequestFactories.get(UnconfigurableClientHttpRequestFactory.class,
+						ClientHttpRequestFactorySettings.DEFAULTS.withReadTimeout(Duration.ofSeconds(60))))
+				.withMessageContaining("suitable setReadTimeout method");
+	}
+
+	@Test
+	void getOfUnconfigurableTypeWithBodyBufferingThrows() {
+		assertThatIllegalStateException()
+				.isThrownBy(() -> ClientHttpRequestFactories.get(UnconfigurableClientHttpRequestFactory.class,
+						ClientHttpRequestFactorySettings.DEFAULTS.withBufferRequestBody(true)))
+				.withMessageContaining("suitable setBufferRequestBody method");
+	}
+
+	@Test
+	void getOfTypeWithDeprecatedConnectTimeoutThrowsWithConnectTimeout() {
+		assertThatIllegalStateException()
+				.isThrownBy(() -> ClientHttpRequestFactories.get(DeprecatedMethodsClientHttpRequestFactory.class,
+						ClientHttpRequestFactorySettings.DEFAULTS.withConnectTimeout(Duration.ofSeconds(60))))
+				.withMessageContaining("setConnectTimeout method marked as deprecated");
+	}
+
+	@Test
+	void getOfTypeWithDeprecatedReadTimeoutThrowsWithReadTimeout() {
+		assertThatIllegalStateException()
+				.isThrownBy(() -> ClientHttpRequestFactories.get(DeprecatedMethodsClientHttpRequestFactory.class,
+						ClientHttpRequestFactorySettings.DEFAULTS.withReadTimeout(Duration.ofSeconds(60))))
+				.withMessageContaining("setReadTimeout method marked as deprecated");
+	}
+
+	@Test
+	void getOfTypeWithDeprecatedBufferRequestBodyThrowsWithBufferRequestBody() {
+		assertThatIllegalStateException()
+				.isThrownBy(() -> ClientHttpRequestFactories.get(DeprecatedMethodsClientHttpRequestFactory.class,
+						ClientHttpRequestFactorySettings.DEFAULTS.withBufferRequestBody(false)))
+				.withMessageContaining("setBufferRequestBody method marked as deprecated");
+	}
+
+	@Test
+	void connectTimeoutCanBeConfiguredOnAWrappedRequestFactory() {
+		SimpleClientHttpRequestFactory requestFactory = new SimpleClientHttpRequestFactory();
+		BufferingClientHttpRequestFactory result = ClientHttpRequestFactories.get(
+				() -> new BufferingClientHttpRequestFactory(requestFactory),
+				ClientHttpRequestFactorySettings.DEFAULTS.withConnectTimeout(Duration.ofMillis(1234)));
+		assertThat(result).extracting("requestFactory").isSameAs(requestFactory);
+		assertThat(requestFactory).hasFieldOrPropertyWithValue("connectTimeout", 1234);
+	}
+
+	@Test
+	void readTimeoutCanBeConfiguredOnAWrappedRequestFactory() {
+		SimpleClientHttpRequestFactory requestFactory = new SimpleClientHttpRequestFactory();
+		BufferingClientHttpRequestFactory result = ClientHttpRequestFactories.get(
+				() -> new BufferingClientHttpRequestFactory(requestFactory),
+				ClientHttpRequestFactorySettings.DEFAULTS.withReadTimeout(Duration.ofMillis(1234)));
+		assertThat(result).extracting("requestFactory").isSameAs(requestFactory);
+		assertThat(requestFactory).hasFieldOrPropertyWithValue("readTimeout", 1234);
+	}
+
+	@Test
+	void bufferRequestBodyCanBeConfiguredOnAWrappedRequestFactory() {
+		SimpleClientHttpRequestFactory requestFactory = new SimpleClientHttpRequestFactory();
+		assertThat(requestFactory).hasFieldOrPropertyWithValue("bufferRequestBody", true);
+		BufferingClientHttpRequestFactory result = ClientHttpRequestFactories.get(
+				() -> new BufferingClientHttpRequestFactory(requestFactory),
+				ClientHttpRequestFactorySettings.DEFAULTS.withBufferRequestBody(false));
+		assertThat(result).extracting("requestFactory").isSameAs(requestFactory);
+		assertThat(requestFactory).hasFieldOrPropertyWithValue("bufferRequestBody", false);
+	}
+
+	public static class TestClientHttpRequestFactory implements ClientHttpRequestFactory {
+
+		private int connectTimeout;
+
+		private int readTimeout;
+
+		private boolean bufferRequestBody;
+
+		@Override
+		public ClientHttpRequest createRequest(URI uri, HttpMethod httpMethod) throws IOException {
+			throw new UnsupportedOperationException();
+		}
+
+		public void setConnectTimeout(int timeout) {
+			this.connectTimeout = timeout;
+		}
+
+		public void setReadTimeout(int timeout) {
+			this.readTimeout = timeout;
+		}
+
+		public void setBufferRequestBody(boolean bufferRequestBody) {
+			this.bufferRequestBody = bufferRequestBody;
+		}
+
+	}
+
+	public static class UnconfigurableClientHttpRequestFactory implements ClientHttpRequestFactory {
+
+		@Override
+		public ClientHttpRequest createRequest(URI uri, HttpMethod httpMethod) throws IOException {
+			throw new UnsupportedOperationException();
+		}
+
+	}
+
+	public static class DeprecatedMethodsClientHttpRequestFactory implements ClientHttpRequestFactory {
+
+		@Override
+		public ClientHttpRequest createRequest(URI uri, HttpMethod httpMethod) throws IOException {
+			throw new UnsupportedOperationException();
+		}
+
+		@Deprecated(since = "3.0.0", forRemoval = false)
+		public void setConnectTimeout(int timeout) {
+		}
+
+		@Deprecated(since = "3.0.0", forRemoval = false)
+		public void setReadTimeout(int timeout) {
+		}
+
+		@Deprecated(since = "3.0.0", forRemoval = false)
+		public void setBufferRequestBody(boolean bufferRequestBody) {
+		}
+
+	}
+
+}

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/web/client/ClientHttpRequestFactorySettingsTests.java

@@ -0,0 +1,69 @@
+/*
+ * Copyright 2012-2022 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.boot.web.client;
+
+import java.time.Duration;
+
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Tests for {@link ClientHttpRequestFactorySettings}.
+ *
+ * @author Phillip Webb
+ */
+class ClientHttpRequestFactorySettingsTests {
+
+	private static final Duration ONE_SECOND = Duration.ofSeconds(1);
+
+	@Test
+	void defaultsHasNullValues() {
+		ClientHttpRequestFactorySettings settings = ClientHttpRequestFactorySettings.DEFAULTS;
+		assertThat(settings.connectTimeout()).isNull();
+		assertThat(settings.readTimeout()).isNull();
+		assertThat(settings.bufferRequestBody()).isNull();
+	}
+
+	@Test
+	void withConnectTimeoutReturnsInstanceWithUpdatedConnectionTimeout() {
+		ClientHttpRequestFactorySettings settings = ClientHttpRequestFactorySettings.DEFAULTS
+				.withConnectTimeout(ONE_SECOND);
+		assertThat(settings.connectTimeout()).isEqualTo(ONE_SECOND);
+		assertThat(settings.readTimeout()).isNull();
+		assertThat(settings.bufferRequestBody()).isNull();
+	}
+
+	@Test
+	void withReadTimeoutReturnsInstanceWithUpdatedReadTimeout() {
+		ClientHttpRequestFactorySettings settings = ClientHttpRequestFactorySettings.DEFAULTS
+				.withReadTimeout(ONE_SECOND);
+		assertThat(settings.connectTimeout()).isNull();
+		assertThat(settings.readTimeout()).isEqualTo(ONE_SECOND);
+		assertThat(settings.bufferRequestBody()).isNull();
+	}
+
+	@Test
+	void withBufferRequestBodyReturnsInstanceWithUpdatedBufferRequestBody() {
+		ClientHttpRequestFactorySettings settings = ClientHttpRequestFactorySettings.DEFAULTS
+				.withBufferRequestBody(true);
+		assertThat(settings.connectTimeout()).isNull();
+		assertThat(settings.readTimeout()).isNull();
+		assertThat(settings.bufferRequestBody()).isTrue();
+	}
+
+}

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/web/client/RestTemplateBuilderTests.java

@@ -18,28 +18,21 @@ package org.springframework.boot.web.client;
 
 import java.net.URI;
 import java.nio.charset.StandardCharsets;
-import java.time.Duration;
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.Set;
+import java.util.function.Function;
 import java.util.function.Supplier;
 
-import okhttp3.OkHttpClient;
-import org.assertj.core.api.InstanceOfAssertFactories;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.extension.ExtendWith;
 import org.mockito.InOrder;
 import org.mockito.Mock;
 import org.mockito.junit.jupiter.MockitoExtension;
 
-import org.springframework.aot.hint.RuntimeHints;
-import org.springframework.aot.hint.predicate.ReflectionHintsPredicates;
-import org.springframework.aot.hint.predicate.RuntimeHintsPredicates;
-import org.springframework.boot.web.client.RestTemplateBuilder.RestTemplateBuilderRuntimeHints;
 import org.springframework.http.HttpHeaders;
 import org.springframework.http.HttpMethod;
 import org.springframework.http.MediaType;
-import org.springframework.http.client.AbstractClientHttpRequestFactoryWrapper;
 import org.springframework.http.client.BufferingClientHttpRequestFactory;
 import org.springframework.http.client.ClientHttpRequest;
 import org.springframework.http.client.ClientHttpRequestFactory;
@@ -47,22 +40,18 @@ import org.springframework.http.client.ClientHttpRequestInitializer;
 import org.springframework.http.client.ClientHttpRequestInterceptor;
 import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
 import org.springframework.http.client.InterceptingClientHttpRequestFactory;
-import org.springframework.http.client.OkHttp3ClientHttpRequestFactory;
 import org.springframework.http.client.SimpleClientHttpRequestFactory;
 import org.springframework.http.converter.HttpMessageConverter;
 import org.springframework.http.converter.ResourceHttpMessageConverter;
 import org.springframework.http.converter.StringHttpMessageConverter;
 import org.springframework.test.util.ReflectionTestUtils;
 import org.springframework.test.web.client.MockRestServiceServer;
-import org.springframework.util.ReflectionUtils;
 import org.springframework.web.client.ResponseErrorHandler;
 import org.springframework.web.client.RestTemplate;
 import org.springframework.web.util.UriTemplateHandler;
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.assertThatIllegalArgumentException;
-import static org.assertj.core.api.Assertions.assertThatIllegalStateException;
-import static org.assertj.core.api.Assertions.assertThatThrownBy;
 import static org.assertj.core.api.Assertions.entry;
 import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.BDDMockito.then;
@@ -255,7 +244,7 @@ class RestTemplateBuilderTests {
 	void requestFactoryClassWhenFactoryIsNullShouldThrowException() {
 		assertThatIllegalArgumentException()
 				.isThrownBy(() -> this.builder.requestFactory((Class<ClientHttpRequestFactory>) null))
-				.withMessageContaining("RequestFactory must not be null");
+				.withMessageContaining("RequestFactoryType must not be null");
 	}
 
 	@Test
@@ -274,7 +263,15 @@ class RestTemplateBuilderTests {
 	void requestFactoryWhenSupplierIsNullShouldThrowException() {
 		assertThatIllegalArgumentException()
 				.isThrownBy(() -> this.builder.requestFactory((Supplier<ClientHttpRequestFactory>) null))
-				.withMessageContaining("RequestFactory Supplier must not be null");
+				.withMessageContaining("RequestFactorySupplier must not be null");
+	}
+
+	@Test
+	void requestFactoryWhenFunctionIsNullShouldThrowException() {
+		assertThatIllegalArgumentException()
+				.isThrownBy(() -> this.builder
+						.requestFactory((Function<ClientHttpRequestFactorySettings, ClientHttpRequestFactory>) null))
+				.withMessageContaining("RequestFactoryFunction must not be null");
 	}
 
 	@Test
@@ -459,128 +456,6 @@ class RestTemplateBuilderTests {
 		assertThat(template.getRequestFactory()).isInstanceOf(HttpComponentsClientHttpRequestFactory.class);
 	}
 
-	@Test
-	void connectTimeoutCanBeNullToUseDefault() {
-		ClientHttpRequestFactory requestFactory = this.builder.requestFactory(SimpleClientHttpRequestFactory.class)
-				.setConnectTimeout(null).build().getRequestFactory();
-		assertThat(requestFactory).hasFieldOrPropertyWithValue("connectTimeout", -1);
-	}
-
-	@Test
-	void readTimeoutCanBeNullToUseDefault() {
-		ClientHttpRequestFactory requestFactory = this.builder.requestFactory(SimpleClientHttpRequestFactory.class)
-				.setReadTimeout(null).build().getRequestFactory();
-		assertThat(requestFactory).hasFieldOrPropertyWithValue("readTimeout", -1);
-	}
-
-	@Test
-	void connectTimeoutCanBeConfiguredOnHttpComponentsRequestFactory() {
-		ClientHttpRequestFactory requestFactory = this.builder
-				.requestFactory(HttpComponentsClientHttpRequestFactory.class).setConnectTimeout(Duration.ofMillis(1234))
-				.build().getRequestFactory();
-		assertThat(((int) ReflectionTestUtils.getField(requestFactory, "connectTimeout"))).isEqualTo(1234);
-	}
-
-	@Test
-	void readTimeoutConfigurationFailsOnHttpComponentsRequestFactory() {
-		assertThatThrownBy(() -> this.builder.requestFactory(HttpComponentsClientHttpRequestFactory.class)
-				.setReadTimeout(Duration.ofMillis(1234)).build()).isInstanceOf(IllegalStateException.class)
-						.hasMessageContaining("setReadTimeout method marked as deprecated");
-	}
-
-	@Test
-	void bufferRequestBodyCanBeConfiguredOnHttpComponentsRequestFactory() {
-		ClientHttpRequestFactory requestFactory = this.builder
-				.requestFactory(HttpComponentsClientHttpRequestFactory.class).setBufferRequestBody(false).build()
-				.getRequestFactory();
-		assertThat(requestFactory).hasFieldOrPropertyWithValue("bufferRequestBody", false);
-		requestFactory = this.builder.requestFactory(HttpComponentsClientHttpRequestFactory.class)
-				.setBufferRequestBody(true).build().getRequestFactory();
-		assertThat(requestFactory).hasFieldOrPropertyWithValue("bufferRequestBody", true);
-		requestFactory = this.builder.requestFactory(HttpComponentsClientHttpRequestFactory.class).build()
-				.getRequestFactory();
-		assertThat(requestFactory).hasFieldOrPropertyWithValue("bufferRequestBody", true);
-	}
-
-	@Test
-	void connectTimeoutCanBeConfiguredOnSimpleRequestFactory() {
-		ClientHttpRequestFactory requestFactory = this.builder.requestFactory(SimpleClientHttpRequestFactory.class)
-				.setConnectTimeout(Duration.ofMillis(1234)).build().getRequestFactory();
-		assertThat(requestFactory).hasFieldOrPropertyWithValue("connectTimeout", 1234);
-	}
-
-	@Test
-	void readTimeoutCanBeConfiguredOnSimpleRequestFactory() {
-		ClientHttpRequestFactory requestFactory = this.builder.requestFactory(SimpleClientHttpRequestFactory.class)
-				.setReadTimeout(Duration.ofMillis(1234)).build().getRequestFactory();
-		assertThat(requestFactory).hasFieldOrPropertyWithValue("readTimeout", 1234);
-	}
-
-	@Test
-	void bufferRequestBodyCanBeConfiguredOnSimpleRequestFactory() {
-		ClientHttpRequestFactory requestFactory = this.builder.requestFactory(SimpleClientHttpRequestFactory.class)
-				.setBufferRequestBody(false).build().getRequestFactory();
-		assertThat(requestFactory).hasFieldOrPropertyWithValue("bufferRequestBody", false);
-		requestFactory = this.builder.requestFactory(SimpleClientHttpRequestFactory.class).setBufferRequestBody(true)
-				.build().getRequestFactory();
-		assertThat(requestFactory).hasFieldOrPropertyWithValue("bufferRequestBody", true);
-		requestFactory = this.builder.requestFactory(SimpleClientHttpRequestFactory.class).build().getRequestFactory();
-		assertThat(requestFactory).hasFieldOrPropertyWithValue("bufferRequestBody", true);
-	}
-
-	@Test
-	void connectTimeoutCanBeConfiguredOnOkHttpRequestFactory() {
-		ClientHttpRequestFactory requestFactory = this.builder.requestFactory(OkHttp3ClientHttpRequestFactory.class)
-				.setConnectTimeout(Duration.ofMillis(1234)).build().getRequestFactory();
-		assertThat(requestFactory).extracting("client", InstanceOfAssertFactories.type(OkHttpClient.class))
-				.extracting(OkHttpClient::connectTimeoutMillis).isEqualTo(1234);
-	}
-
-	@Test
-	void readTimeoutCanBeConfiguredOnOkHttp3RequestFactory() {
-		ClientHttpRequestFactory requestFactory = this.builder.requestFactory(OkHttp3ClientHttpRequestFactory.class)
-				.setReadTimeout(Duration.ofMillis(1234)).build().getRequestFactory();
-		assertThat(requestFactory).extracting("client", InstanceOfAssertFactories.type(OkHttpClient.class))
-				.extracting(OkHttpClient::readTimeoutMillis).isEqualTo(1234);
-	}
-
-	@Test
-	void bufferRequestBodyCanNotBeConfiguredOnOkHttp3RequestFactory() {
-		assertThatIllegalStateException()
-				.isThrownBy(() -> this.builder.requestFactory(OkHttp3ClientHttpRequestFactory.class)
-						.setBufferRequestBody(false).build().getRequestFactory())
-				.withMessageContaining(OkHttp3ClientHttpRequestFactory.class.getName());
-	}
-
-	@Test
-	void connectTimeoutCanBeConfiguredOnAWrappedRequestFactory() {
-		SimpleClientHttpRequestFactory requestFactory = new SimpleClientHttpRequestFactory();
-		this.builder.requestFactory(() -> new BufferingClientHttpRequestFactory(requestFactory))
-				.setConnectTimeout(Duration.ofMillis(1234)).build();
-		assertThat(requestFactory).hasFieldOrPropertyWithValue("connectTimeout", 1234);
-	}
-
-	@Test
-	void readTimeoutCanBeConfiguredOnAWrappedRequestFactory() {
-		SimpleClientHttpRequestFactory requestFactory = new SimpleClientHttpRequestFactory();
-		this.builder.requestFactory(() -> new BufferingClientHttpRequestFactory(requestFactory))
-				.setReadTimeout(Duration.ofMillis(1234)).build();
-		assertThat(requestFactory).hasFieldOrPropertyWithValue("readTimeout", 1234);
-	}
-
-	@Test
-	void bufferRequestBodyCanBeConfiguredOnAWrappedRequestFactory() {
-		SimpleClientHttpRequestFactory requestFactory = new SimpleClientHttpRequestFactory();
-		this.builder.requestFactory(() -> new BufferingClientHttpRequestFactory(requestFactory))
-				.setBufferRequestBody(false).build();
-		assertThat(requestFactory).hasFieldOrPropertyWithValue("bufferRequestBody", false);
-		this.builder.requestFactory(() -> new BufferingClientHttpRequestFactory(requestFactory))
-				.setBufferRequestBody(true).build();
-		assertThat(requestFactory).hasFieldOrPropertyWithValue("bufferRequestBody", true);
-		this.builder.requestFactory(() -> new BufferingClientHttpRequestFactory(requestFactory)).build();
-		assertThat(requestFactory).hasFieldOrPropertyWithValue("bufferRequestBody", true);
-	}
-
 	@Test
 	void unwrappingDoesNotAffectRequestFactoryThatIsSetOnTheBuiltTemplate() {
 		SimpleClientHttpRequestFactory requestFactory = new SimpleClientHttpRequestFactory();
@@ -589,58 +464,6 @@ class RestTemplateBuilderTests {
 		assertThat(template.getRequestFactory()).isInstanceOf(BufferingClientHttpRequestFactory.class);
 	}
 
-	@Test
-	void shouldRegisterHints() {
-		RuntimeHints hints = new RuntimeHints();
-		new RestTemplateBuilderRuntimeHints().registerHints(hints, getClass().getClassLoader());
-		ReflectionHintsPredicates reflection = RuntimeHintsPredicates.reflection();
-		assertThat(reflection
-				.onField(ReflectionUtils.findField(AbstractClientHttpRequestFactoryWrapper.class, "requestFactory")))
-						.accepts(hints);
-	}
-
-	@Test
-	void shouldRegisterHttpComponentHints() {
-		RuntimeHints hints = new RuntimeHints();
-		new RestTemplateBuilderRuntimeHints().registerHints(hints, getClass().getClassLoader());
-		ReflectionHintsPredicates reflection = RuntimeHintsPredicates.reflection();
-		assertThat(reflection.onMethod(ReflectionUtils.findMethod(HttpComponentsClientHttpRequestFactory.class,
-				"setConnectTimeout", int.class))).accepts(hints);
-		assertThat(reflection.onMethod(
-				ReflectionUtils.findMethod(HttpComponentsClientHttpRequestFactory.class, "setReadTimeout", int.class)))
-						.accepts(hints);
-		assertThat(reflection.onMethod(ReflectionUtils.findMethod(HttpComponentsClientHttpRequestFactory.class,
-				"setBufferRequestBody", boolean.class))).accepts(hints);
-	}
-
-	@Test
-	void shouldRegisterOkHttpHints() {
-		RuntimeHints hints = new RuntimeHints();
-		new RestTemplateBuilderRuntimeHints().registerHints(hints, getClass().getClassLoader());
-		ReflectionHintsPredicates reflection = RuntimeHintsPredicates.reflection();
-		assertThat(reflection.onMethod(
-				ReflectionUtils.findMethod(OkHttp3ClientHttpRequestFactory.class, "setConnectTimeout", int.class)))
-						.accepts(hints);
-		assertThat(reflection.onMethod(
-				ReflectionUtils.findMethod(OkHttp3ClientHttpRequestFactory.class, "setReadTimeout", int.class)))
-						.accepts(hints);
-	}
-
-	@Test
-	void shouldRegisterSimpleHttpHints() {
-		RuntimeHints hints = new RuntimeHints();
-		new RestTemplateBuilderRuntimeHints().registerHints(hints, getClass().getClassLoader());
-		ReflectionHintsPredicates reflection = RuntimeHintsPredicates.reflection();
-		assertThat(reflection.onMethod(
-				ReflectionUtils.findMethod(SimpleClientHttpRequestFactory.class, "setConnectTimeout", int.class)))
-						.accepts(hints);
-		assertThat(reflection.onMethod(
-				ReflectionUtils.findMethod(SimpleClientHttpRequestFactory.class, "setReadTimeout", int.class)))
-						.accepts(hints);
-		assertThat(reflection.onMethod(ReflectionUtils.findMethod(SimpleClientHttpRequestFactory.class,
-				"setBufferRequestBody", boolean.class))).accepts(hints);
-	}
-
 	private ClientHttpRequest createRequest(RestTemplate template) {
 		return ReflectionTestUtils.invokeMethod(template, "createRequest", URI.create("http://localhost"),
 				HttpMethod.GET);
@@ -654,4 +477,8 @@ class RestTemplateBuilderTests {
 
 	}
 
+	static class TestHttpComponentsClientHttpRequestFactory extends HttpComponentsClientHttpRequestFactory {
+
+	}
+
 }

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/web/client/RestTemplateBuilderTestsOkHttp3Tests.java

@@ -1,66 +0,0 @@
-/*
- * Copyright 2012-2022 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.boot.web.client;
-
-import java.time.Duration;
-
-import okhttp3.OkHttpClient;
-import org.assertj.core.api.InstanceOfAssertFactories;
-import org.junit.jupiter.api.Test;
-
-import org.springframework.boot.testsupport.classpath.ClassPathOverrides;
-import org.springframework.http.client.ClientHttpRequestFactory;
-import org.springframework.http.client.OkHttp3ClientHttpRequestFactory;
-
-import static org.assertj.core.api.Assertions.assertThat;
-import static org.assertj.core.api.Assertions.assertThatIllegalStateException;
-
-/**
- * Tests for {@link RestTemplateBuilder} with OkHttp 3.x.
- *
- * @author Andy Wilkinson
- */
-@ClassPathOverrides("com.squareup.okhttp3:okhttp:3.14.9")
-class RestTemplateBuilderTestsOkHttp3Tests {
-
-	private RestTemplateBuilder builder = new RestTemplateBuilder();
-
-	@Test
-	void connectTimeoutCanBeConfiguredOnOkHttpRequestFactory() {
-		ClientHttpRequestFactory requestFactory = this.builder.requestFactory(OkHttp3ClientHttpRequestFactory.class)
-				.setConnectTimeout(Duration.ofMillis(1234)).build().getRequestFactory();
-		assertThat(requestFactory).extracting("client", InstanceOfAssertFactories.type(OkHttpClient.class))
-				.extracting(OkHttpClient::connectTimeoutMillis).isEqualTo(1234);
-	}
-
-	@Test
-	void readTimeoutCanBeConfiguredOnOkHttpRequestFactory() {
-		ClientHttpRequestFactory requestFactory = this.builder.requestFactory(OkHttp3ClientHttpRequestFactory.class)
-				.setReadTimeout(Duration.ofMillis(1234)).build().getRequestFactory();
-		assertThat(requestFactory).extracting("client", InstanceOfAssertFactories.type(OkHttpClient.class))
-				.extracting(OkHttpClient::readTimeoutMillis).isEqualTo(1234);
-	}
-
-	@Test
-	void bufferRequestBodyCanNotBeConfiguredOnOkHttpRequestFactory() {
-		assertThatIllegalStateException()
-				.isThrownBy(() -> this.builder.requestFactory(OkHttp3ClientHttpRequestFactory.class)
-						.setBufferRequestBody(false).build().getRequestFactory())
-				.withMessageContaining(OkHttp3ClientHttpRequestFactory.class.getName());
-	}
-
-}

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/webservices/client/HttpWebServiceMessageSenderBuilderTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2022 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.
@@ -57,8 +57,8 @@ class HttpWebServiceMessageSenderBuilderTests {
 
 	@Test
 	void buildUsesHttpComponentsByDefault() {
-		ClientHttpRequestMessageSender messageSender = build(
+		ClientHttpRequestMessageSender messageSender = build(new HttpWebServiceMessageSenderBuilder()
-				new HttpWebServiceMessageSenderBuilder().setConnectTimeout(Duration.ofSeconds(5)));
+				.setConnectTimeout(Duration.ofSeconds(5)).setReadTimeout(Duration.ofSeconds(5)));
 		ClientHttpRequestFactory requestFactory = messageSender.getRequestFactory();
 		assertThat(requestFactory).isInstanceOf(HttpComponentsClientHttpRequestFactory.class);
 	}

spring-boot-system-tests/spring-boot-deployment-tests/src/systemTest/java/org/springframework/boot/deployment/AbstractDeploymentTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2021 the original author or authors.
+ * Copyright 2012-2022 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.