It is one of the EventBridge implementations, and as such is used in two places in Cayenne:

1. cross-VM server cache notifications.
2. client commit notifications in 3-tier setup.

Actually I wrote XMPP version of the event bridge specifically for case (2), as unlike other Cayenne "bridges" it provides extra *presence* information, so one can write an app on top of XMPP server to watch who is online at any given time, or send an IM message to all connected Cayenne clients, etc. I see lots of possibilities here...

Andrus


On May 24, 2006, at 7:03 PM, Marcin Skladaniec wrote:

XMPP messaging sounds good. Is anyone using it ?
How does it work, does it send a notifications about any changes in context, or when the context is committed ?

Regards
Marcin

On 25/05/2006, at 5:08 AM, Andrus Adamchik wrote:

cayenne.jar bundles essential runtime dependencies. Smack and JMS libs are needed for the optional extensions (cross-vm messaging via XMPP or JMS). You can safely ignore those warnings.

Andrus

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