Advanced Queuing - Oracle

JMS Propagation
Scheduling Propagation
Remote database:
database db2 - Western Shipping database.
/* get messages for subscriber priority */
public void get_priority_messages1(TopicSession jms_session)
{
Topic topic;
TopicReceiver trecs;
ObjectMessage obj_message;
BolCustomer customer;
BolOrder booked_order;
try
{
/* get a handle to the OE_bookedorders_topic */
topic = ((AQjmsSession)jms_session).getTopic("WS",
"WS_bookedorders_topic");
/* create a local receiver "Priority" for the remote subscription
* to WS_bookedorders_topic
*/
trecs = ((AQjmsSession)jms_session).createTopicReceiver(topic, "Priority",
null);
obj_message = (ObjectMessage) trecs.receive();
booked_order = (BolOrder)obj_message.getObject();
customer = booked_order.getCustomer();
System.out.println("Priority Order: for customer " +
customer.getName());
jms_session.commit();
}
catch (JMSException ex)
{ System.out.println("Exception :" + ex); }
}
Propagation must be scheduled using the schedule_propagation method for
every topic from which messages are propagated to target destination databases.
A schedule indicates the time frame during which messages can be propagated
from the source topic. This time frame may depend on a number of factors such as
network traffic, load at source database, load at destination database, and so on.
The schedule therefore has to be tailored for the specific source and destination.
12-88 Oracle9i Application Developer’s Guide - Advanced Queuing