Hi,

I am trying to use Hibernate EntityManager package in an old J2EE server which doesn't support EJB3 (Oracle's OC4J). Previously, I used Hibernate 3.1 Core in the J2EE server. I used Container Managed Transaction, org.hibernate.transaction.CMTTransactionFactory and sessionFactory.getCurrentSession() in order to get the session object associated with current transaction and also get the benefit of automatically flushing session before the transaction completes, closing session after the transaction completes.

However, I can’t find a method similar to sessionFactory.getCurrentSession() when I try to get an EntityManager when I use EntityManager package. Because this is old J2EE container that doesn’t support EJB3, the following annotation doesn’t work (em is always null):

public class SPDirectorySetupItemDAO {
@PersistenceContext(unitName="hibernate")
EntityManager em;


So I try to use following code to get EntityManager:

EntityManagerFactory emf=Persistence.createEntityManagerFactory("hibernate");

EntityManager em2 = emf.createEntityManager();


The J2EE server gives me following warning:
WARNING J2EE JTA0115 An exception occurred while making afterCompletion notifications: setRollbackOnly() called with no active Transaction

I don’t know whether this is correct way to get current EntityManager associated with current transaction.

Thanks a lot!

Jifeng


Hibernate version:
Core 3.2RC1 Hibernate Annotations 3.1.0 beta 10
Hibernate EntityManager 3.1.0 beta 8

Check out this:
http://docs.jboss.org/ejb3/embedded/embedded.html

I can't use JBoss EJB Embaddable container in my company's production environment for following reasons:

1. JBoss EJB Embaddable container is in alpha version. It is not reliable enough for a production environment.

2. I don't want to 2 EJB containers ( the other one is Oracle's) running in our system. It makes source code hard to maintain and to communicate with each other.

Then just use Hibernate persistence and still Oracke's EJBs:


Or you can still fall back to H3 SessionFactory.getCurrentSession(), which is even better than EJB3 persistence - Criteria API, ...

what is the full oracle stacktrace?

The Exception I mentioned is gone after I use CurrentEntityManagerImpl in EntityManagerFactory.getEntityManager() method.

is nolonger part of the specification, because of... Oracle I believe :-)