Advanced Queuing - Oracle

Dequeue Features
Eastern Region Shipping handles orders for the Eastern region of the U.S.
Overseas Shipping handles all non-U.S. orders.
Overseas Shipping checks for the XMLType attribute to identify special
handling.
Eastern Region Shipping also handles all U.S. rush orders.
Each shipping application subscribes to the OE booked orders queue. The following
rule-based subscriptions are defined by the Order Entry user to handle the routing
of booked orders from the Order Entry application to each of the Shipping
applications.
PL/SQL (DBMS_AQADM Package): Example Code
CONNECT OE/OE;
Western Region Shipping defines an agent called 'West_Shipping' with the WS
booked orders queue as the agent address (destination queue where messages must
be delivered). This agent subscribes to the OE booked orders queue using a rule
specified on order region and ordertype attributes.
/* Add a rule-based subscriber for West Shipping -
West Shipping handles Western region U.S. orders,
Rush Western region orders are handled by East Shipping: */
DECLARE
subscriber aq$_agent;
BEGIN
subscriber := aq$_agent('West_Shipping', 'WS.WS_bookedorders_que', null);
dbms_aqadm.add_subscriber(
queue_name => 'OE.OE_bookedorders_que',
subscriber => subscriber,
rule => 'tab.user_data.orderregion =
''WESTERN'' AND tab.user_data.ordertype != ''RUSH''');
END;
/
Eastern Region Shipping defines an agent called East_Shipping with the ES
booked orders queue as the agent address (the destination queue where messages
must be delivered). This agent subscribes to the OE booked orders queue using a
rule specified on orderregion, ordertype and customer attributes.
/* Add a rule-based subscriber for East Shipping -
East shipping handles all Eastern region orders,
East shipping also handles all U.S. rush orders: */
DECLARE
subscriber aq$_agent;
A Sample Application Using AQ 8-87