java.lang.IllegalStateException:带有AOP的键[org.hibernate.impl.SessionFactoryImpl]没有值

每次使用Hibernate更新实体时都会出错。 以下是我的故事：

我有一个带有注释@Transactional的服务，正在调用一个DAO.update方法

@Service
@Transactional
public class FooServiceImpl implements FooService {
    @Inject
    private FooDAO fooDAO;

    @Override
    public Foo update(Foo foo) {
       return fooDAO.update(foo);
    }

    @Override
    public Foo find(int fooId) {
       return fooDAO.findById(fooId);
    }
}

我有一个AOP，它捕获DAO.update以进行一些操作

@Aspect
@Order(2)
@Component
public class FooTackerAspect {
   @Inject
   private FooService fooService;

   @Inject
   private SessionFactoryManager sessionFactoryManager;

   @Pointcut("execution(* com.foo.bar.FooService.update(..))")
   public void methodToTrack() {}

   @Around("methodToTrack")
   public Object track(final ProceedingJoinPoint joinPoint) throws Throwable {
      int fooId = fetchIdFromJoinPoint(joinPoint);
      Foo foo = fooService.find(fooId);

      // Do some operations

      // I close the session in order to avoid the exception
      // org.hibernate.NonUniqueObjectException: a different object with
      // the same identifier value was already associated with the session
      sessionFactoryManager.getSessionFactory(DataSource.FOO)
          .getCurrentSession().close();

      Object retVal = joinPoint.proceed();
      return retVal;
   }
}

但是，在更新实体（fooDAO.update（foo））后，我得到以下错误：

2056953 [http-bio-8080-exec-4] ERROR o.s.t.s.TransactionSynchronizationUtils - TransactionSynchronization.beforeCompletion threw exception 
java.lang.IllegalStateException: No value for key [org.hibernate.impl.SessionFactoryImpl@762d6271] bound to thread [http-bio-8080-exec-4]
    at org.springframework.transaction.support.TransactionSynchronizationManager.unbindResource(TransactionSynchronizationManager.java:209) ~[spring-tx-3.2.4.RELEASE.jar:3.2.4.RELEASE]
    at org.springframework.orm.hibernate3.SpringSessionSynchronization.beforeCompletion(SpringSessionSynchronization.java:193) ~[spring-orm-3.2.4.RELEASE.jar:3.2.4.RELEASE]
    at org.springframework.transaction.support.TransactionSynchronizationUtils.triggerBeforeCompletion(TransactionSynchronizationUtils.java:106) ~[spring-tx-3.2.4.RELEASE.jar:3.2.4.RELEASE]
    at org.springframework.transaction.support.AbstractPlatformTransactionManager.triggerBeforeCompletion(AbstractPlatformTransactionManager.java:938) [spring-tx-3.2.4.RELEASE.jar:3.2.4.RELEASE]
    at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:739) [spring-tx-3.2.4.RELEASE.jar:3.2.4.RELEASE]
    at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:724) [spring-tx-3.2.4.RELEASE.jar:3.2.4.RELEASE]
    at org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:475) [spring-tx-3.2.4.RELEASE.jar:3.2.4.RELEASE]
    at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:270) [spring-tx-3.2.4.RELEASE.jar:3.2.4.RELEASE]
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:94) [spring-tx-3.2.4.RELEASE.jar:3.2.4.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172) [spring-aop-3.2.4.RELEASE.jar:3.2.4.RELEASE]
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204) [spring-aop-3.2.4.RELEASE.jar:3.2.4.RELEASE]
    at com.sun.proxy.$Proxy112.update(Unknown Source) [$Proxy112.class:na]

此错误未被阻止（更新仍在进行）。但是我想纠正这个错误。 你知道我怎么做吗

---

我认为错误是因为我关闭了会话。但是我必须关闭它才能更新实体。

正如@kriegaex所说，问题来自于我正在使用同一个会话执行查找和更新操作

@Aspect
@Order(2)
@Component
public class FooTackerAspect {
   @Inject
   private FooService fooService;

   @Inject
   private SessionFactoryManager sessionFactoryManager;

   @Pointcut("execution(* com.foo.bar.FooService.update(..))")
   public void methodToTrack() {}

   @Around("methodToTrack")
   public Object track(final ProceedingJoinPoint joinPoint) throws Throwable {
      int fooId = fetchIdFromJoinPoint(joinPoint);
      Foo foo = fooService.find(fooId);

      // Do some operations

      // I close the session in order to avoid the exception
      // org.hibernate.NonUniqueObjectException: a different object with
      // the same identifier value was already associated with the session
      sessionFactoryManager.getSessionFactory(DataSource.FOO)
          .getCurrentSession().close();

      Object retVal = joinPoint.proceed();
      return retVal;
   }
}

根据这些信息，我使用以下解决方法（有效）：我使用两个单独的会话，一个用于查找，另一个用于更新

@Repository
public class FooDAOImpl implements FooDAO {
    private FooHibernateDaoSupport hibernateDaoSupport;

    public FooDAOImpl() {
        // Init DaoSupport
    }

    @Override
    public Foo findById(final Serializable fooId) {
        StatelessSession session = hibernateDaoSupport.getSessionFactory().openStatelessSession();
        Foo foo = (Foo) session.get(Foo.class, fooId);
        session.close;
        return foo;
    }

    @Override
    public Foo update(Foo foo) {
        getHibernateTemplate().update(entity);
        return entity;
    }
}

使用此解决方案，不再需要在我的建议代码中关闭会话

---

注意：我正在打开一个无状态会话，因为在我的项目中，FooService.update也会调用FooService.find来设置一些属性，所以我不想修改我的建议代码。

首先关闭会话并调用

FooServiceImpl.update（）听起来不健康

之后，因为这正是

继续（）

所做的。我建议您修复建议代码。可能您希望通过关闭会话来避免的另一个异常是由于您在代码中所做的操作没有向我们公开，而是由注释“Dosomeoperation”代替。