我正在尝试进行实验，以尝试缓存来自Jersey控制器/ Web服务的JSON响应，以查看它是否对性能产生影响。
我有以下泽西岛休息服务。
@Component
@Path("/client")
@Produces(MediaType.APPLICATION_JSON)
public class ClientController {
private static Logger logger = LoggerFactory.getLogger(ClientController.class);
@Autowired
IClientService clientService;
@GET
@Cacheable(value = "jerseyCache")
public String getClients() {
return "Nothing, I'm Sync!";
}
@GET
@Path("/deferred")
public DeferredResult<String> getClientsAsync() {
DeferredResult<String> deferredResult = new DeferredResult<>();
deferredResult.setResult("Nothing! But I'm Async!");
return deferredResult;
}
@GET
@Path("/async")
public void getClientsJAXRSAsync(@Suspended AsyncResponse response) {
new Thread(() -> {
response.resume("I am Async too! But I am using @Suspended");
}).start();
}
@GET
@Path("{id}")
public Client getClient(@PathParam("id") Long id) {
return new Client();
}
@POST
@Consumes(MediaType.APPLICATION_JSON)
public Client createClient(@Valid Client client) {
return new Client();
}
@PUT
@Path("{id}")
@Consumes(MediaType.APPLICATION_JSON)
public void updateClient(@PathParam("id") Long id, @Valid Client client) {
return;
}
@DELETE
@Path("{id}")
public void deleteClient(@PathParam("id")Long id) {
return;
}
当我调用/ api / client时，得到以下堆栈跟踪。
15:01:55.681 ERROR DirectJDKLog.log - Servlet.service() for servlet [jerseyServlet] in context with path [] threw exception [java.lang.NullPointerException] with root cause
java.lang.NullPointerException: null
at org.springframework.cache.interceptor.AbstractCacheResolver.resolveCaches(AbstractCacheResolver.java:78) ~[spring-context-4.2.0.RC1.jar:4.2.0.RC1]
at org.springframework.cache.interceptor.CacheAspectSupport.getCaches(CacheAspectSupport.java:216) ~[spring-context-4.2.0.RC1.jar:4.2.0.RC1]
at org.springframework.cache.interceptor.CacheAspectSupport$CacheOperationContext.<init>(CacheAspectSupport.java:568) ~[spring-context-4.2.0.RC1.jar:4.2.0.RC1]
at org.springframework.cache.interceptor.CacheAspectSupport.getOperationContext(CacheAspectSupport.java:229) ~[spring-context-4.2.0.RC1.jar:4.2.0.RC1]
at org.springframework.cache.interceptor.CacheAspectSupport$CacheOperationContexts.<init>(CacheAspectSupport.java:511) ~[spring-context-4.2.0.RC1.jar:4.2.0.RC1]
at org.springframework.cache.interceptor.CacheAspectSupport.execute(CacheAspectSupport.java:302) ~[spring-context-4.2.0.RC1.jar:4.2.0.RC1]
at org.springframework.cache.interceptor.CacheInterceptor.invoke(CacheInterceptor.java:61) ~[spring-context-4.2.0.RC1.jar:4.2.0.RC1]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) ~[spring-aop-4.2.0.RC1.jar:4.2.0.RC1]
at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:653) ~[spring-aop-4.2.0.RC1.jar:4.2.0.RC1]
at net.jkratz.agility.web.ClientController$$EnhancerBySpringCGLIB$$1ad41944.getClients(<generated>) ~[spring-core-4.2.0.RC1.jar:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_45]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_45]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_45]
at java.lang.reflect.Method.invoke(Method.java:497) ~[na:1.8.0_45]
at org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory$1.invoke(ResourceMethodInvocationHandlerFactory.java:81) ~[jersey-server-2.18.jar:na]
at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher$1.run(AbstractJavaResourceMethodDispatcher.java:144) ~[jersey-server-2.18.jar:na]
at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:161) ~[jersey-server-2.18.jar:na]
at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$TypeOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:205) ~[jersey-server-2.18.jar:na]
at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:99) ~[jersey-server-2.18.jar:na]
at org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:389) ~[jersey-server-2.18.jar:na]
at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:347) ~[jersey-server-2.18.jar:na]
at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:102) ~[jersey-server-2.18.jar:na]
at org.glassfish.jersey.server.ServerRuntime$2.run(ServerRuntime.java:308) ~[jersey-server-2.18.jar:na]
at org.glassfish.jersey.internal.Errors$1.call(Errors.java:271) ~[jersey-common-2.18.jar:na]
at org.glassfish.jersey.internal.Errors$1.call(Errors.java:267) ~[jersey-common-2.18.jar:na]
at org.glassfish.jersey.internal.Errors.process(Errors.java:315) ~[jersey-common-2.18.jar:na]
at org.glassfish.jersey.internal.Errors.process(Errors.java:297) ~[jersey-common-2.18.jar:na]
at org.glassfish.jersey.internal.Errors.process(Errors.java:267) ~[jersey-common-2.18.jar:na]
at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:317) ~[jersey-common-2.18.jar:na]
at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:291) ~[jersey-server-2.18.jar:na]
at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:1140) ~[jersey-server-2.18.jar:na]
at org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:403) ~[jersey-container-servlet-core-2.18.jar:na]
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:386) ~[jersey-container-servlet-core-2.18.jar:na]
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:334) ~[jersey-container-servlet-core-2.18.jar:na]
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:221) ~[jersey-container-servlet-core-2.18.jar:na]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291) ~[tomcat-embed-core-8.0.23.jar:8.0.23]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) ~[tomcat-embed-core-8.0.23.jar:8.0.23]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) ~[tomcat-embed-websocket-8.0.23.jar:8.0.23]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239) ~[tomcat-embed-core-8.0.23.jar:8.0.23]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) ~[tomcat-embed-core-8.0.23.jar:8.0.23]
at org.springframework.boot.actuate.autoconfigure.EndpointWebMvcAutoConfiguration$ApplicationContextHeaderFilter.doFilterInternal(EndpointWebMvcAutoConfiguration.java:329) ~[spring-boot-actuator-1.3.0.M1.jar:1.3.0.M1]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.2.0.RC1.jar:4.2.0.RC1]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239) ~[tomcat-embed-core-8.0.23.jar:8.0.23]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) ~[tomcat-embed-core-8.0.23.jar:8.0.23]
at org.springframework.boot.actuate.trace.WebRequestTraceFilter.doFilterInternal(WebRequestTraceFilter.java:102) ~[spring-boot-actuator-1.3.0.M1.jar:1.3.0.M1]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.2.0.RC1.jar:4.2.0.RC1]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239) ~[tomcat-embed-core-8.0.23.jar:8.0.23]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) ~[tomcat-embed-core-8.0.23.jar:8.0.23]
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) ~[spring-web-4.2.0.RC1.jar:4.2.0.RC1]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.2.0.RC1.jar:4.2.0.RC1]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239) ~[tomcat-embed-core-8.0.23.jar:8.0.23]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) ~[tomcat-embed-core-8.0.23.jar:8.0.23]
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77) ~[spring-web-4.2.0.RC1.jar:4.2.0.RC1]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.2.0.RC1.jar:4.2.0.RC1]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239) ~[tomcat-embed-core-8.0.23.jar:8.0.23]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) ~[tomcat-embed-core-8.0.23.jar:8.0.23]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:85) ~[spring-web-4.2.0.RC1.jar:4.2.0.RC1]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.2.0.RC1.jar:4.2.0.RC1]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239) ~[tomcat-embed-core-8.0.23.jar:8.0.23]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) ~[tomcat-embed-core-8.0.23.jar:8.0.23]
at org.springframework.boot.actuate.autoconfigure.MetricsFilter.doFilterInternal(MetricsFilter.java:68) ~[spring-boot-actuator-1.3.0.M1.jar:1.3.0.M1]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.2.0.RC1.jar:4.2.0.RC1]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239) ~[tomcat-embed-core-8.0.23.jar:8.0.23]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) ~[tomcat-embed-core-8.0.23.jar:8.0.23]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219) ~[tomcat-embed-core-8.0.23.jar:8.0.23]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106) [tomcat-embed-core-8.0.23.jar:8.0.23]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502) [tomcat-embed-core-8.0.23.jar:8.0.23]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142) [tomcat-embed-core-8.0.23.jar:8.0.23]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) [tomcat-embed-core-8.0.23.jar:8.0.23]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88) [tomcat-embed-core-8.0.23.jar:8.0.23]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:518) [tomcat-embed-core-8.0.23.jar:8.0.23]
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1091) [tomcat-embed-core-8.0.23.jar:8.0.23]
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:668) [tomcat-embed-core-8.0.23.jar:8.0.23]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1521) [tomcat-embed-core-8.0.23.jar:8.0.23]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1478) [tomcat-embed-core-8.0.23.jar:8.0.23]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_45]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_45]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-8.0.23.jar:8.0.23]
at java.lang.Thread.run(Thread.java:745) [na:1.8.0_45]
这是我的CacheConfig
@Configuration
@EnableCaching
public class CacheConfig implements CachingConfigurer {
@Bean
@Override
public CacheManager cacheManager() {
EhCacheCacheManager cacheManager = new EhCacheCacheManager();
cacheManager.setCacheManager(ehCacheManagerFactoryBean().getObject());
return cacheManager;
}
@Bean
@Override
public KeyGenerator keyGenerator() {
return new SimpleKeyGenerator();
}
@Override
public CacheResolver cacheResolver() {
return new SimpleCacheResolver();
}
@Override
public CacheErrorHandler errorHandler() {
return new SimpleCacheErrorHandler();
}
@Bean
public EhCacheManagerFactoryBean ehCacheManagerFactoryBean() {
EhCacheManagerFactoryBean ehCacheManagerFactoryBean = new EhCacheManagerFactoryBean();
ehCacheManagerFactoryBean.setConfigLocation(new ClassPathResource("ehcache.xml"));
ehCacheManagerFactoryBean.setShared(true);
ehCacheManagerFactoryBean.setCacheManagerName("agilityCacheManager");
return ehCacheManagerFactoryBean;
}
最后是我的ehcache.xml
<?xml version="1.0" encoding="UTF-8"?>
<ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="http://ehcache.org/ehcache.xsd"
updateCheck="false"
monitoring="autodetect"
dynamicConfig="true">
<diskStore path="java.io.tmpdir" />
<defaultCache
maxElementsInMemory="10000"
eternal="false"
timeToIdleSeconds="0"
timeToLiveSeconds="0"
overflowToDisk="true"
diskSpoolBufferSizeMB="50"
maxElementsOnDisk="100000"
diskExpiryThreadIntervalSeconds="300"
memoryStoreEvictionPolicy="LRU"
statistics="true">
</defaultCache>
<cache name="jerseyCache"
maxElementsInMemory="10000"
eternal="false"
timeToIdleSeconds="0"
timeToLiveSeconds="0"
overflowToDisk="true"
diskSpoolBufferSizeMB="50"
maxElementsOnDisk="100000"
diskExpiryThreadIntervalSeconds="300"
memoryStoreEvictionPolicy="LRU"
statistics="true">
</cache>
<cache
name="org.hibernate.cache.spi.UpdateTimestampsCache"
maxElementsInMemory="10000"
eternal="false">
</cache>
<cache
name="org.hibernate.cache.internal.StandardQueryCache"
maxElementsInMemory="10000"
eternal="false"
timeToLiveSeconds="300">
</cache>
</ehcache>
最佳答案
我遇到了类似的问题，如Spring从3.2.13迁移到4.2.1。最后，通过将“ implements CachingConfigurer”替换为“ extends CachingConfigurerSupport”，最终可以工作。