Advanced Queuing - Oracle

JMS Message Consumer Features
}
System.out.println("Exception: " + ex);
}
Message Listener for All Consumers on a Session
The JMS client can receive messages asynchronously for all the consumers of the
session by setting the MessageListener at the session.
When a message arrives for any of the message consumers of the session, the
onMessage method of the message listener is invoked with the message. The
message listener can commit or abort the receipt of the message. The message
listener will not receive messages if the JMS connection has been stopped. No other
mode for receiving messages must be used in the session once the message listener
has been set.
Example Scenario and Code
In the customer service component of the BooksOnLine example, messages from
different databases arrive at the customer service topics, indicating the state of the
order. The customer service application monitors the topics and whenever there is a
message about a customer order, it updates the order status in the order_status_
table. The application uses the session listener to monitor the different topics.
Whenever there is a message in any of the topics, the onMessage method of the
session MessageListener is invoked.
/* define our message listener class */
public class CustomerListener implements MessageListener
{
TopicSession the_sess;
/* constructor */
CustomerListener(TopicSession my_sess)
{
the_sess = my_sess;
}
/* message listener interface */
public void onMessage(Message m)
{
ObjectMessage obj_msg;
BolCustomer customer;
BolOrder new_order = null;
try
12-78 Oracle9i Application Developer’s Guide - Advanced Queuing