Hai,

Usually for the Receiver application inorder to get reference of Message
Interface, he has to register the listener and implement onMessage(Message
msg) ,but I saw this example which is working fine without the help of
Listener .

=========================

public class QReceiver

{

public static void main(String[] args)

{   

try{   

InitialContext
initContext = new InitialContext();

QueueConnectionFactory factory =(QueueConnectionFactory)
initContext.lookup("factoryName");

Queue queue = (Queue) initContext.lookup("queueName");

QueueConnection connection = factory.createQueueConnection();

QueueSession session =connection.createQueueSession(false,
Session.AUTO_ACKNOWLEDGE);

QueueReceiver receiver = session.createReceiver(queue);

connection.start();

Message msg = null;

String msgText = "";

do {  

msg = receiver.receive();

if (msg instanceof TextMessage)

{   

msgText = ((TextMessage)msg).getText();

System.out.println("Message Received = "+ msgText );

}

}while(msgText.equals("quit"));

} catch
(Exception e) {}

}

}

=========================

My Question is :

1. To receive the message without the help of MessageListsener is it
   acceptable using the above code?If acceptable ,when to go for this knid of coding?
   
2. This program is it asynchronous behaviour or synchronous behaviour?