I concur with dmiley.
Depending on the order in which ESB acknowledges the message from source and sends to
destination come in, you will get either an "at most once" or
"dups_ok" delivery guarantee.
For a "once and only once" delivery guarantee the ack and the send need to be in
the same transaction.
If the source and destination are handled by the same resource manager then that
transaction can be a simple local jms tx, otherwise it would need to be a JTA tx.
All the above cases are handled by the JBM bridge. I'm not clear they are handled by
the ESB router.
I would consider guaranteed delivery (once and only once) to be a very common requirement
for bridging.
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