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

[Murat Yanik]

User development,

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

http://community.jboss.org/message/527444#527444

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

Message:
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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 ?
 
Greetings

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