Question

使用Guice 3.0，遵循本教程：https://code.google.com/p/google-guice/wiki/JPA

GuiceModule类：

public class GuiceModule extends ServletModule {

@Override
protected void configureServlets() {
  // start the service
  bind(JPAInitializer.class).asEagerSingleton();

  // PersistFilter
  filter("/*").through(PersistFilter.class);

  // jpa + guice
  install(new JpaPersistModule("drone-cloud"));

  // bindings
  bind(UserService.class).to(UserServiceImpl.class);
  bind(TwoFactorAuthenticator.class).to(GoogleAuthenticator.class);
  bind(ImageQueue.class).asEagerSingleton();
  bind(DroneCloudServerHandler.class).asEagerSingleton();
 }
}

JPAInitializer.class

import javax.inject.Inject;
import com.google.inject.persist.PersistService;

public class JPAInitializer {
   @Inject
   JPAInitializer(PersistService service) {
      service.start();
   }
}

控制器类：

@Consumes(MediaType.APPLICATION_JSON)
@Path("/mission")
public class MissionController {

   @Inject
   Provider<EntityManager> _em;

   @Path("/new")
   @POST
   @Transactional
   public String newMission(SimpleMission mission) {

      _em.get().persist(mission);
      _em.get().flush();
      _em.get().close();

      return "{ \"mission_id\": \"" + mission.getId() + "\" }";
   }
}

堆栈跟踪：

javax.persistence.TransactionRequiredException：没有正在进行的事务在org.hibernate.jpa.spi.AbstractEntityManagerImpl.checkTransactionNeeded（AbstractEntityManagerImpl.java:1171）在org.hibernate.jpa.spi.AbstractEntityManagerImpl.flush（AbstractEntityManagerImpl.java:1332）在com.drone.mission.controller.MissionController.newMission（MissionController.java:37） at sun.reflect.NativeMethodAccessorImpl.invoke0（Native Method） at sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:57） at sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43） at java.lang.reflect.Method.invoke（Method.java:606） at org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory $ 1.invoke（ResourceMethodInvocationHandlerFactory.java:81） at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher $ 1.run（AbstractJavaResourceMethodDispatcher.java:151）在org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke（AbstractJavaResourceMethodDispatcher.java:171） at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider $ TypeOutInvoker.doDispatch（JavaResourceMethodDispatcherProvider.java:195） at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch（AbstractJavaResourceMethodDispatcher.java:104）在org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke（ResourceMethodInvoker.java:406）在org.glassfish.jersey.server.model.ResourceMethodInvoker.apply（ResourceMethodInvoker.java:350）在org.glassfish.jersey.server.model.ResourceMethodInvoker.apply（ResourceMethodInvoker.java:106）在org.glassfish.jersey.server.ServerRuntime $ 1.run（ServerRuntime.java:259）在org.glassfish.jersey.internal.Errors $ 1.call（Errors.java:271）在org.glassfish.jersey.internal.Errors $ 1.call（Errors.java:267）在org.glassfish.jersey.internal.Errors.process（Errors.java:315）在org.glassfish.jersey.internal.Errors.process（Errors.java:297）在org.glassfish.jersey.internal.Errors.process（Errors.java:267）在org.glassfish.jersey.process.internal.RequestScope.runInScope（RequestScope.java:320）在org.glassfish.jersey.server.ServerRuntime.process（ServerRuntime.java:236）在org.glassfish.jersey.server.ApplicationHandler.handle（ApplicationHandler.java:1028）在org.glassfish.jersey.servlet.WebComponent.service（WebComponent.java:373）在org.glassfish.jersey.servlet.ServletContainer.service（ServletContainer.java:381）在org.glassfish.jersey.servlet.ServletContainer.service（ServletContainer.java:344）在org.glassfish.jersey.servlet.ServletContainer.service（ServletContainer.java:219）在org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:303）在org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:208）在org.apache.tomcat.websocket.server.WsFilter.doFilter（WsFilter.java:52）在org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:241）在org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:208）在org.apache.catalina.core.StandardWrapperValve.invoke（StandardWrapperValve.java:220） at org.apache.catalina.core.StandardContextValve .__ invoke（StandardContextValve.java:122） at org.apache.catalina.core.StandardContextValve.invoke（StandardContextValve.java）在org.apache.catalina.authenticator.AuthenticatorBase.invoke（AuthenticatorBase.java:501）在org.apache.catalina.core.StandardHostValve .__ invoke（StandardHostValve.java:170） at org.apache.catalina.core.StandardHostValve.invoke（StandardHostValve.java） at org.apache.catalina.valves.ErrorReportValve.invoke（ErrorReportValve.java:98）在org.apache.catalina.valves.AccessLogValve.invoke（AccessLogValve.java:950）在org.apache.catalina.core.StandardEngineValve.invoke（StandardEngineValve.java:116）在org.apache.catalina.connector.CoyoteAdapter.service（CoyoteAdapter.java:408）在org.apache.coyote.http11.AbstractHttp11Processor.process（AbstractHttp11Processor.java:1040） at org.apache.coyote.AbstractProtocol $ AbstractConnectionHandler.process（AbstractProtocol.java:607）在org.apache.tomcat.util.net.JIoEndpoint $ SocketProcessor.run（JIoEndpoint.java:313）在java.util.concurrent.ThreadPoolExecutor.runWorker（ThreadPoolExecutor.java:1145） at java.util.concurrent.ThreadPoolExecutor $ Worker.run（ThreadPoolExecutor.java:615）在java.lang.Thread.run（Thread.java:744）

我做错了什么？

由于

Answer 1

问题是，MissionController类是由泽西管理的，不是由Guice管理，所以它没有被JpaLocalTxnInterceptor

拦截

我通过将与DB相关的代码移动到另一个类来解决它，如下所示：

class MissionController {
    @Inject MissionDao dao;
    ....
}


public class MissionDao {
   @Inject Provider<EntityManager> em;

   @Transactional
   public void save(SimpleMission mission) {
      em.get().persist(mission);
   }
   ...
}

TransactionRequiredException：Jersey + Guice + JPA没有进行任何事务

1 个答案: