Advanced Queuing - Oracle

Propagation Features
Scenario
In the BooksOnLine example, the ES_bookedorders_que in the Eastern Shipping
region is stopped intentionally using the stop_queue() call. After a short while the
propagation schedule for OE_bookedorders_que will display an error indicating
that the remote queue ES_bookedorders_que is disabled for enqueuing. When the
ES_bookedorders_que is started using the start_queue() call, propagation to
that queue resumes and there is no error message associated with schedule for OE_
bookedorders_que.
PL/SQL (DBMS_AQADM Package): Example Code
/* Intentionally stop the eastern shipping queue : */
connect BOLADM/BOLADM
EXECUTE dbms_aqadm.stop_queue(queue_name => 'ES.ES_bookedorders_que');
/* Wait for some time before error shows up in dba_queue_schedules: */
EXECUTE dbms_lock.sleep(100);
/* This query will return an ORA-25207 enqueue failed error: */
SELECT qname, last_error_msg from dba_queue_schedules;
/* Start the eastern shipping queue: */
EXECUTE dbms_aqadm.start_queue(queue_name => 'ES.ES_bookedorders_que');
/* Wait for Propagation to resume for eastern shipping queue: */
EXECUTE dbms_lock.sleep(100);
/* This query will indicate that there are no errors with propagation:
SELECT qname, last_error_msg from dba_queue_schedules;
Visual Basic (OO4O): Example Code
This functionality is handled by the database.
Java (JDBC): Example Code
No example is provided with this release.
Message Format Transformation During Propagation
At propagation time, a transformation can be specified when adding a rule-based
subscriber to OE_bookedorders_topic for Western shipping orders. The
transformation is applied to the orders, transforming them to the WS.order_typ_
sh type before propagating them to WS_bookedorders_topic.
A Sample Application Using AQ 8-117