EJB3 Session Bean (Bean Managed Transaction) issue

[wargun02]

Hi,

I have a problem with getting bean managed transaction or more appropriately user managed transaction to work on my Session Bean (EJB3 specs.)

I have a session bean with the EntityManager "em" already defined and I have a method xxx() which is suppose to rollback all which persistence when one of them failed.

I tried to obtain the EntityTransaction by calling:

EntityTransaction trxn = em.getTransaction();

try
{
trxn.begin();
//do something...
trxn.commit();
}
catch(Exception ex)
{
trxn.rollback();
}

Unfortunately, JBoss throws IllegalStateException while calling em.getTransaction(). May I know how do I configure the session bean to be able to handle user managed transaction instead of container managed transaction (like the old days where we could define that in the ejb-jar.xml)? I'm running on JBoss 4.0.4RC1.

Any help will be greatly appreciated. Thank you.

[aakashvj]

For User Managed Transactions you can annotate your session bean with following annotation:
@TransactionManagement(TransactionManagementType.BEAN)

instead of EntityTransaction you can do a JNDI lookup for UserTransaction say :

UserTransaction usrTx = (UserTransaction) ic.lookup("UserTransaction");

[wargun02]

Hi aakashvj,

Thanks for the reply. You've got a great working post here.

I think I still need to be more firmiliar with the annotation thingy...

Thank you.