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

[Clebert Suconic (JIRA)]

    [ https://jira.jboss.org/jira/browse/JBAS-7270?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12486311#action_12486311 ] 

Clebert Suconic commented on JBAS-7270:
---------------------------------------

+1 about the timeout. I thought the timeout was implicit defined.

> 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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