JMS Request Reply Pattern, No Output - request

Question

TestRequestresponse:
public static void main(String args[]) throws JMSException {
TibjmsConnectionFactory connectionFactory = new TibjmsConnectionFactory(
"tcp://localhost:7222");
Connection con = connectionFactory.createConnection("admin", "");
con.start();
Session s = con.createSession();
System.out.println("Successfully created JMS Connection and Session!");
Queue q1 = s.createQueue("train.ems.queue.test");
System.out.println(q1);
System.out.println("Queue created!");
TemporaryQueue tq = s.createTemporaryQueue();
MessageProducer mp = s.createProducer(q1);
MessageConsumer mc = s.createConsumer(tq);
TextMessage tm = s.createTextMessage("Hi this is ABHISHEK!");
tm.setStringProperty("Country", "IN");
tm.setJMSCorrelationID("SENDER");
tm.setJMSReplyTo(tq);
mp.setTimeToLive(30000);
mp.setDeliveryMode(DeliveryMode.NON_PERSISTENT);
mp.setPriority(Message.DEFAULT_PRIORITY);
mp.send(tm);
Message recv = mc.receive(60000);
if (recv != null) {
System.out.println(recv.getBody(String.class));
}
mp.close();
s.close();
con.close();
}
TestAsyncReceiveMessage:
public class TestAsyncReceiveMessage implements MessageListener {
Session s;
Queue q1;
MessageProducer mp;
public static void main(String ars[]) throws JMSException {
TestAsyncReceiveMessage obj = new TestAsyncReceiveMessage();
obj.createSession();
obj.createQueue();
obj.msgConsumer();
}
private void msgConsumer() throws JMSException {
// TODO Auto-generated method stub
MessageConsumer mc = s.createConsumer(q1, "Country='IN'");
mc.setMessageListener(new TestAsyncReceiveMessage());
}
private void createQueue() throws JMSException {
// TODO Auto-generated method stub
q1 = s.createQueue("train.ems.queue.test");
// t1=s.createTopic("train.ems.topic.test");
}
private void createSession() throws JMSException {
// TODO Auto-generated method stub
TibjmsConnectionFactory connectionFactory = new TibjmsConnectionFactory(
"tcp://localhost:7222");
Connection con = connectionFactory.createConnection("admin", "");
s = con.createSession();
System.out.println("Successfully created JMS Connection and Session!");
}
public void onMessage(Message arg0) {
try {
System.out.println(arg0.getBody(String.class));
TextMessage tm = s.createTextMessage("ACk");
Queue t = (Queue) arg0.getJMSReplyTo();
mp = s.createProducer(t);
mp.send(tm);
} catch (JMSException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
Well First it showed me NullPointerException when creating TextMessage in onMessage, i changed something and theres no more exception, but theres no putput either. Help! :)

Answer 1

You have not called Connection.Start() method after creating it in TestAsyncReceiveMessage code. Application has to call Connection.Start() to inform the messaging provider to start delivering messages. Otherwise messages will not be delivered to consumer.
Connection.Start is typically called after consumer is created and any message listeners are attached to consumer so that the consumer is ready to receive messages.