Hello,

Can someone give me an example how to use Hibernate with JTA in EJBs.

Here is my EJB code (EJB is controlled by containter, method transaction attribute is "Required"):
---------------------
Session session = Application.getInstance().getHibernateSession();
System.out.println("class:"+session.getClass());
session.setFlushMode(FlushMode.COMMIT);
Utilisateur user = new Utilisateur();
user.setDn("mydn");
user.setNom("mynom");
user.setPrenom("myprenom");
user.setSmtp("mysmtp");
Long id = (Long) session.save(user);
System.out.println("save");
session.flush();
session.close();
-------------------------
I don't understand, why session.flush() commits the tranasction...
I create JTA transaction in my client code :
UserTransaction userTran =(javax.transaction.UserTransaction)ctx.lookup("javax.transaction.UserTransaction");
userTran.begin();
---EJB code call

Thanks!

flush() certainly does NOT commit the transaction!





That looks kinda wrong. There is no Hibernate Transaction, so FlushMode.COMMIT is equivalent to FlushMode.NEVER. Still, you call flush() manually, so it should not be a problem.

That's why I ask this question :) As I found in Hibernate docs, flush must not make commit() in JTA mode. But it does :( . May be there's something wrong with my hibernate configuration? (I do have <property name="jta.UserTransaction">javax.transaction.UserTransaction</property> in my the property file).

My idea : to have multiple EJB methods that will create its own transaction if called alone or use transaction that was created before...

PS. i tried not to use FlushMode.NEVER - it changes nothing :(

Are you certain auto-commit is disabled for the jdbc connection? If not then flush would cause a commit. This would commit only the jdbc connection, however, and not the UserTransaction.

No. Hibernate disables auto-commit.