Hi,

I am using Hibernate v2.1.7. Can someone please point me to the documentation where it states NOT to explicitly call begin transaction and commit transaction in an EJB transaction (say using Weblogic)?

I've repeatedly searched the "Hibernate in Action" book and online docs, but can't seem to find ample documentation on this.

Thanks for your help.

Senario: Call to a SLSB that is CMT. Hibernate transaction performed.

The transaction is managed by the container so there is no need to call the transaction API.

Thanks. What is SLSB?

Stateless Session bean

Thanks for the response. So, now I have two questions:

1. Is it necessary I use JTA with Hibernate in an EJB container? (Dis)advantages?

2. If I use JTA, then I only have to open, flush, and close the session to commit to the database?

I appreciate your help. Thanks.

There is little point in using a EJB container if your not using the facilties it offers (and is good at). Container Managed Transactions (CMT) is one of these facilties. Do you have to? NO. Should you? YES. It saves you a lot of work and concern.

Yes open, flush and close. Don't forget the include appropriate exception handling and rollback hint as required.

Thanks David. My problems were occuring because I didn't have the ejb.transaction flag set to "Required", instead it was set to "Supports". Now, when I open, flush, and close the session - it works just fine.

One last question, what 'rollback hint' are you referring to? You did not mention any nor have I read about it.

Thanks again.

CMT Context object has a method that allows you to tell (a hint to) the CMT engine to rollback the transaction rather than commiting it. Obviously, this would only normally happen if there was an exception of some description. Look at the J2EE API or an approrpiate EJB book for examples.