Using JMS without a client on Weblogic

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My application involves JMS communication between two trouble-ticketing applications, A & B. If A issues an XML ticket, I need JMS (via a message-driven-bean MDB) to send that XML message to B.

I have no problems with the JMS QueueReceiver or JAXB portions of this application. My question is that, since I have no client to actually create an instance of the MDB, will Weblogic create an instance of the MDB anyways, as long as my deployment descriptor is correct and properly setup? If I do the deployment descriptor correctly, will my MDB's onMessage() method be triggered upon receipt of a JMS message to the queue?

Thanks!