Session producerSess = conn.createSession(false, Session.CLIENT_ACKNOWLEDGE);
MessageProducer producer = producerSess.createProducer(queue);
Session consumerSess = conn.createSession(false, Session.CLIENT_ACKNOWLEDGE);
MessageConsumer consumer = consumerSess.createConsumer(queue);
conn.start();
final int NUM_MESSAGES = 20;
//Send some messages
for (int i = 0; i < NUM_MESSAGES; i++)