Advanced Queuing - Oracle

Dequeue Features
The following example shows how you can create a queue with specific maximum
retry and retry delay interval.
PL/SQL (DBMS_AQADM Package): Example Code
/* Example for creating a back order queue in Western Region which allows a
maximum of 5 retries and 1 day delay between each retry. */
CONNECT BOLADM/BOLADM
BEGIN
dbms_aqadm.create_queue (
queue_name => 'WS.WS_backorders_que',
queue_table => 'WS.WS_orders_mqtab',
max_retries => 5,
retry_delay => 60*60*24);
END;
/
/* Create an exception queue for the back order queue for Western Region. */
CONNECT BOLADM/BOLADM
BEGIN
dbms_aqadm.create_queue (
queue_name => 'WS.WS_backorders_excpt_que',
queue_table => 'WS.WS_orders_mqtab',
queue_type => DBMS_AQADM.EXCEPTION_QUEUE);
end;
/
/* Enqueue a message to WS_backorders_que and specify WS_backorders_excpt_que as
the exception queue for the message: */
CONNECT BOLADM/BOLADM
CREATE OR REPLACE PROCEDURE enqueue_WS_unfilled_order(backorder order_typ)
AS
back_order_queue_name varchar2(62);
enqopt dbms_aq.enqueue_options_t;
msgprop dbms_aq.message_properties_t;
enq_msgid raw(16);
BEGIN
/* Set back order queue name for this message: */
back_order_queue_name := 'WS.WS_backorders_que';
/* Set exception queue name for this message: */
msgprop.exception_queue := 'WS.WS_backorders_excpt_que';
dbms_aq.enqueue(back_order_queue_name, enqopt, msgprop,
A Sample Application Using AQ 8-83