[jboss-jira] [JBoss JIRA] Created: (JBAS-7270) MDB Transaction Batch Support

[Clebert Suconic (JIRA)]

MDB Transaction Batch Support
-----------------------------

                 Key: JBAS-7270
                 URL: https://jira.jboss.org/jira/browse/JBAS-7270
             Project: JBoss Application Server
          Issue Type: Feature Request
      Security Level: Public (Everyone can see)
          Components: EJB3
            Reporter: Clebert Suconic
            Assignee: Carlo de Wolf


When someone is receiving messages, this is a pretty common useCase:


Consumer cons = sess.createConsumer(....);
Transaction tx = getTheTransactionSomehow);
int counter = 0;

Message msg = null;
try
 {
 do
 {
    msg = cons.receive(2000); // or a configured timeout
    if (counter ++ == 1000) tx.commit();

    performDBOperations(msg);
 }
 while (msg != null);
}
catch (Exception e)
{
   tx.rollback();
}


However, this is not possible over MDBs.  You basically have to transact every received message.


With the code above, we would instead commit or rollback the entire group.



It should be possible to do this kind of batching with MDBs somehow.



IMO this should be suggested as part of the Specification, as other systems also have it.

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