Session consSession = cnx.createSession(true, 0);
MessageProducer producer = prodSession.createProducer(null);
MessageConsumer consumer = consSession.createConsumer(queue1);
cnx.start();
// Producing messages with a very short time to live: 20 ms.
System.out.println("Sends Message1 with a very short time to live");
TextMessage msg = prodSession.createTextMessage("Message1");
producer.send(queue1, msg, DeliveryMode.NON_PERSISTENT, Message.DEFAULT_PRIORITY, 20);