[jboss-user] [EJB 3.0 Development] New message: "How get a MDB messages from a queue ? Who polls ?"

Murat Yanik do-not-reply at jboss.com
Sat Feb 20 10:30:09 EST 2010

User development,

A new message was posted in the thread "How get a MDB messages from a queue ? Who polls ?":


Author  : Murat Yanik
Profile : http://community.jboss.org/people/ameo

I have a question to MDB functionality.
An MDB implements the MessageListener interface, so it uses the asynchronous onMessage() callback for JMS messages arriving in the queue.
What does it mean ?
How do the system (ejb-container ?) recognize, that a new message is placed in the queue ?  Does it polls agains the database queue and instantiate a new MDB ?


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