Advanced Queuing - Oracle

}
Message Transformation with JMS AQ
receiver = ((AQjmsSession)jms_session).createTopicReceiver(topic,
"WShip, null, WSOrder.getFactory());
/* set the transformation in the publisher */
receiver.setTransformation("OE2WS");
msg = receiver.receive(10);
}
catch (JMSException ex)
{
System.out.println("Exception :" ex);
}
return (AQjmsAdtMessage)msg;
Specifying Transformations for Topic Subscribers
A transformation can also be specified when creating Topic Subscribers using the
CreateDurableSubscriber call. The transformation is applied to the retrieved
message before returning it to the subscriber. If the subscriber specified in the
CreateDurableSubscriber already exists, it’s transformation is set to the
specified transformation.
Example Code
The Western Shipping application subscribes to the OE_bookedorders_topic with
the transformation ’OE2WS’. This transformation is applied to the messages and the
returned message is of Oracle Object type WS.WS_orders.
Lets say that the WSOrder java class has been generated by Jpublisher to map to the
Oracle Object WS.WS_order:
public AQjmsAdtMessage retrieve_booked_orders(TopicSession jms_session)
{
TopicSubscriber subscriber;
Topic topic;
AQjmsAdtMessage msg = null;
try
{
/* get a handle to the OE_bookedorders_topic */
topic = ((AQjmsSession)jms_session).getTopic("OE",
"OE_bookedorders_topic");
Creating Applications Using JMS 12-97