[jboss-dev-forums] [Design of JCA on JBoss] - Re: No LastResource gambit for non-xa MDB

[adrian@jboss.org]

No this is for CMT (and BMT/NotSupported with madness=true :-).

The correct protocol is last resource gambit (assuming MDB uses DB):

1) Prepare DB (vote ok)
2) Commit JMS (session.commit())
3) Commit DB (two phase if 2 works otherwise rollback)

The current protocol for nonXA JMS is "transaction observer" - which is much 
weaker that LRG, we can't stop the DB from committing when jms doesn't commit.


  | tx.commit();
  | if (committed)
  |    session.commit();
  | else
  |    session.rollback();
  | 

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