diff --git a/spring-boot-devtools/src/main/java/org/springframework/boot/devtools/autoconfigure/HateoasObjenesisCacheDisabler.java b/spring-boot-devtools/src/main/java/org/springframework/boot/devtools/autoconfigure/HateoasObjenesisCacheDisabler.java new file mode 100644 index 0000000000..eea57cfdc6 --- /dev/null +++ b/spring-boot-devtools/src/main/java/org/springframework/boot/devtools/autoconfigure/HateoasObjenesisCacheDisabler.java @@ -0,0 +1,64 @@ +/* + * Copyright 2012-2015 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 + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package org.springframework.boot.devtools.autoconfigure; + +import java.lang.reflect.Field; + +import javax.annotation.PostConstruct; + +import org.springframework.objenesis.ObjenesisStd; +import org.springframework.util.ClassUtils; +import org.springframework.util.ReflectionUtils; + +/** + * Replaces the Objenesis instance in Spring HATEOAS's {@code DummyInvocationUtils} with + * one that does not perform any caching. The cache is problematic as it's keyed on class + * name which leads to {@code ClassCastExceptions} as the class loader changes across + * restarts. + * + * @author Andy Wilkinson + * @since 1.3.0 + */ +class HateoasObjenesisCacheDisabler { + + private static boolean cacheDisabled; + + @PostConstruct + void disableCaching() { + if (!cacheDisabled) { + cacheDisabled = true; + doDisableCaching(); + } + } + + private void doDisableCaching() { + try { + Class type = ClassUtils.forName( + "org.springframework.hateoas.core.DummyInvocationUtils", + getClass().getClassLoader()); + Field objenesis = ReflectionUtils.findField(type, "OBJENESIS"); + if (objenesis != null) { + ReflectionUtils.makeAccessible(objenesis); + ReflectionUtils.setField(objenesis, null, new ObjenesisStd(false)); + } + } + catch (Exception ex) { + // Assume that Spring HATEOAS is not on the classpath and continue + } + } + +} diff --git a/spring-boot-devtools/src/main/java/org/springframework/boot/devtools/autoconfigure/LocalDevToolsAutoConfiguration.java b/spring-boot-devtools/src/main/java/org/springframework/boot/devtools/autoconfigure/LocalDevToolsAutoConfiguration.java index fd67a78460..2c916e6bbd 100644 --- a/spring-boot-devtools/src/main/java/org/springframework/boot/devtools/autoconfigure/LocalDevToolsAutoConfiguration.java +++ b/spring-boot-devtools/src/main/java/org/springframework/boot/devtools/autoconfigure/LocalDevToolsAutoConfiguration.java @@ -126,6 +126,11 @@ public class LocalDevToolsAutoConfiguration { this.properties.getRestart().getAllExclude()); } + @Bean + public HateoasObjenesisCacheDisabler hateoasObjenesisCacheDisabler() { + return new HateoasObjenesisCacheDisabler(); + } + @Bean public FileSystemWatcherFactory fileSystemWatcherFactory() { return new FileSystemWatcherFactory() {