jQuery in Action, 3rd edition
The moose likes EJB and other Java EE Technologies and the fly likes Transactions and MDBs Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login
JavaRanch » Java Forums » Java » EJB and other Java EE Technologies
Bookmark "Transactions and MDBs" Watch "Transactions and MDBs" New topic

Transactions and MDBs

Nidhi Juneja

Joined: Oct 07, 2002
Posts: 27
Hi all,
Need ur inputs about using Container Managed Transaction with MDBs.

I have a MDB which uses some helper classes and a Stateless Session Bean for performing its business logic. I am using Container Managed Transaction for the MDB. Do I need to seperately specify the transaction attribute for the Stateless Session Bean this MDB uses or will it be automatically included in the MDB's transaction.
According to Ed Roman:
If you use Conatiner Managed Transaction, MDB will read off the message in the same transaction as it performs its business logic.

Also how can I test that transactions are working as expected.

Sergiu Truta
Ranch Hand

Joined: Dec 16, 2003
Posts: 121
If you want the Stateless Session Bean's methods to run inside the transaction started by the MDB, you should use "Required" as a <trans-attribute>.
For example, if inside onMessage() you are calling a session bean named ProcessSession, inside the deployment descriptor for this session bean you should have:
<method-name>methodName or '*' for all methods</method-name>
Inside Ed Roman's "Mastering EJB 2nd edition" you can find a pretty detailed explanation about Container Managed Transaction.

...watch me...as I'm walking the path...
I agree. Here's the link: http://aspose.com/file-tools
subject: Transactions and MDBs
jQuery in Action, 3rd edition