[JBoss-user] Guarantee Message Ordering in JBossMQ

[Muntean Horia]

Hi,
I am using JBoss-2.4.9, J2SDK1.4.1, WinXP SP1.
Changed configs:
- in jmboss.jcml I changed the persistence manager to "org.jboss.mq.pm.file.PersistenceManager"
- in standardjboss.xml I've changed the "Standard Message Driven Bean" container param <MaximumSize>1</MaximumSize>

I know that jms-1.0.2b states (section 4.4.10) that the "JMS defines that messages sent by a session to a destination must be received in the order in witch they where sent ..." and further "The only ordering that is visible to receiving clients is the order of messages a session send to a particular destination."

Given a SINGLE PRODUCER - SINGLE CONSUMER - ONE DESTINATION design:
- the producer could be a separate JVM connecting to JBossMQ over OIL or a SLSB using JVM protocol with transactional JMS delivery
- the consumer can be MDB or a separate JVM client
- the messages can be sent as goups(one group per QueueSession) but always by only one thread.

Question:does JBossMQ guarantee in any way that I will have a FIFO behaviour? BTW, this knowledge is almost fatal for our app. cause if the order of delivery is not kept we are in big trouble.

Thanks,
Horia



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