Venkateshwar, I looked in 'Java Message Service' from O'Reilly and it seems that messages will be removed from the queue if the JMS provider believes the message was delivered successfully. When you invoke message.acknowledge() you are actually ACK'ing all non-ACKed received messages to that point, not just the single message (according to the book).
I would suggest invoking session.recover() to see if the messages on the queue are redelivered while in CLIENT_ACKNOWLEDGE mode. This should re-deliver the 5 messages. In AUTO mode, it should not send anything. (at least that is the theory...) Good luck, - Mike -----Original Message----- From: Venkateshwar Bommineni [mailto:[EMAIL PROTECTED]] Sent: Friday, September 06, 2002 4:08 PM To: [EMAIL PROTECTED] Subject: RE: [JBoss-user] JMS client acknowledgement Mike, I am not using any explicit persistent messaging. Its default JBOSS mechanism (i guess its file based). And i am able to get the messages without any problem. Issue is without ACK (mesg.acknowledge() method )also they are disappearing from queue as AUTO_ACK. So basically I dont see any difference btw AUTO and CLIENT ACKNOWLEDGE features. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Friday, September 06, 2002 3:40 PM To: [EMAIL PROTECTED] Subject: RE: [JBoss-user] JMS client acknowledgement Are you using persistent messaging? If you are not, messages which have no current receivers are discarded. Your example code shows this. Try placing the sender and receiver code in different threads and run them concurrently. I would also set your receiver timeout a bit longer or your receive loop may exit before your sending is complete. - Mike Mike Hewitt Software Engineer Northrop Grumman IT -----Original Message----- From: Venkateshwar Bommineni [mailto:[EMAIL PROTECTED]] Sent: Friday, September 06, 2002 1:29 PM To: [EMAIL PROTECTED] Subject: [JBoss-user] JMS client acknowledgement I am having problem with CLIENT_ACKNOWLEDGE option for JBOSS JMS implementation. As soon as I read messages from a queue using the above option while creating QueueReceiver from QueueSession, they disappear from queue like they read with AUTO Acknowledge option. What I am missing? Following is the code snippet i am using... session = conn.createQueueSession(false, QueueSession.AUTO_ACKNOWLEDGE); conn.start(); QueueSender send = session.createSender(que); for (int i = 0; i < 5; i++) { TextMessage tm = session.createTextMessage(); tm.setText(text+i); send.send(tm); } send.close(); session = conn.createQueueSession(false, QueueSession.CLIENT_ACKNOWLEDGE); QueueReceiver recv = session.createReceiver(que); for (int i = 0; i < 5; i++) { TextMessage mesg = (TextMessage) recv.receive(10); if (mesg != null){ System.out.println("message recvd:" + mesg.getText()); } else { System.out.println("no message found"); break; } } ////>>>>>>>>>>>>> i dont see any messages in QUEUE, at this point of time... recv.close(); ------------------------------------------------------- This sf.net email is sponsored by: OSDN - Tired of that same old cell phone? Get a new here for FREE! https://www.inphonic.com/r.asp?r=sourceforge1&refcode1=vs3390 _______________________________________________ JBoss-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/jboss-user ------------------------------------------------------- This sf.net email is sponsored by: OSDN - Tired of that same old cell phone? Get a new here for FREE! https://www.inphonic.com/r.asp?r=sourceforge1&refcode1=vs3390 _______________________________________________ JBoss-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/jboss-user ------------------------------------------------------- This sf.net email is sponsored by: OSDN - Tired of that same old cell phone? Get a new here for FREE! https://www.inphonic.com/r.asp?r=sourceforge1&refcode1=vs3390 _______________________________________________ JBoss-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/jboss-user ------------------------------------------------------- This sf.net email is sponsored by: OSDN - Tired of that same old cell phone? Get a new here for FREE! https://www.inphonic.com/r.asp?r=sourceforge1&refcode1=vs3390 _______________________________________________ JBoss-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/jboss-user
