How do I control through-put of messages when using MDB?

[jeuk]

Hi,

I'm developing an application which needs to control the number of jms messages the MDB handles.
So far the only way I've come up with is limiting the JBoss installation to 1 bean and then handle the messages 1 by 1 and slow down between reads until the desired speed is achived.
Is there another way to do this?

I'm fairly new to the concept of MDBs.

Thanks.

[ramat123]

Can you supply more info? Who owns the queue? You or another app? Is it a synchronized confirmed delivery?

[jeuk]

Hi Ramat,

I own the queues, and they are confirmed delivery.

The idea of the application is that I have a queue for messages that needs to be distributed to other applications (External to my system).
Each external application can only handle a fixed amount of messages per second so I need to throttle the speed down to match their rate.

Thanks.

[genman]

The only existing feature to sort of emulate throttling is to use scheduled messages. Or, track the rate using a singleton counter and sleep() appropriately.

The real way to implement this would be to extend the generic JMS resource adapter.

http://www.jboss.org/wiki/Wiki.jsp?page=ConfigJMSMessageListener

I've taken a look at adding throttling ("flow control") by creating a plug-in interface, but I didn't really need it after all. I got stuck coming up with a decent way to configure such a thing. Really what you want the RA to call is something registered (in JNDI? in the MBean server? Class.forName.newInstance()?) but then really have per-instance (MDB) configuration parameters.