Acknowledgement from receiver

[anithavs]

Hi,
I would like to know is there a way the sender can know whether the message has been received by the receiver ie a kind of acknowledgement from receiver to sender. I am using dynamically created queues(with RMIAdaptor). And once the message has been received, i don't want the message to be persisted.
Thanks
Anitha

[adrian.brock]

It is not persisted once it is acknowledged.

Regards,
Adrian

[anithavs]

Hi Adrian.
Thanks!!
Is there a way sender can check whether message is sent to receiver. If there is any way, can u pls elaborate on that. B'cuz my requirement is, I'll be creating the queues as and when a user logins in with a specific role. And would be first creating queue for him with his userId. Then whenever a message is sent, he gets it if he's online. He might go offline/logoff also in between. So, if the receiver has gone off, the sender can keep trying for some specific times and on failure can remove that destination.
How i can achieve this?
Hope i've made things clear
Thanks
Anitha

[adrian.brock]

Sounds like a non durable topic subscription.
If the user isn't subscribed to the topic, any messages
sent to it are dropped.

Regards,
Adrian

[anithavs]

Hi Adrian,
Thanks,
Does the same thing (non durable topic) holds good for queue also?
Anitha

[adrian.brock]

No. Messages are retained hen nobody is listening.

Regards,
Adrian

[anithavs]

Are the messages retained even if the queue is a dynamically created one like how i've created using RMIAdaptor.
i've created th queue like

RMIAdaptor server = (RMIAdaptor) jndiContext.lookup("jmx/rmi/RMIAdaptor");
server.invoke(new ObjectName("jboss.mq:service=DestinationManager"),
"createQueue",new Object[] { queueName },
new String[] { "java.lang.String" });
queueSession = queueConn.createQueueSession(false, Session.AUTO_ACKNOWLEDGE);
queue = queueSession.createQueue(queueName);


That means i don't 've any entries for that queue in jbossmq-destinations-service.xml file.
Thanks
Anitha

[adrian.brock]

It is still a permenant queue. So messages are persisted for
reliable delivery.

Regards,
Adrian