Thoughts about Connection Consumer

Hi All,
I was going through the jms interfaces and came across the Connection Consumer interface. I'm not very sure, how well does this interface work within a scope of an XA transaction.
I believe that Application Servers use connection consumers in order to service MDBs deployed on them. The connection consumer's job is to fetch messages from the server and fill up the JMS session in the server session pool provided by the App Server.
My question is how does the connection consumer associate the transaction context with the message it pops from the server. Note the connection is not aware of any transaction.
Thanks
- k

Hi,
Thanks for ur reply. However, there is still a little bit of confusion. Please read on..
As JMS�s transactions are managed on the session
level, a message that is loaded in a session by the
connection consumer is viewed as consumed within this
session and therefore its consumption falls under the
session�s transaction. From this it appears that the connection consumer fetches a message from the server and then loads it into a session (which might be an xa session). However when the JMS server had sent this message it was obviously unaware of the transaction of which this message would be a part of.
And working the above arguement backwards, I can say that the JMS Server could only be aware of the the transaction context if and only if the connection consumer sends it with the request to pop a message. The connection consumer can only get the transaction context from the session to which it would deliver the message. => The connection consumer needs to pop a session first and then send a request to the server along with it's transaction context. However, the specs seem to indicate the opposite.
You may be careful here, and check your JMS
implementation behaviour as some JMS vendors
may commit or abort all the messages that have
been previously loaded in the session. I understand that this issue would be specific to the jms vendor. I hope some vendors on this group can shed light on how they handle this.
Thanks
-K

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Thoughts about Connection Consumer

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