Advanced Queuing - Oracle

WHEN no_messages THEN
DBMS_OUTPUT.PUT_LINE (’No more messages for RED’);
COMMIT;
END;
BEGIN
/* Consumer GREEN will get MESSAGE 1: */
dequeue_options.consumer_name := ’GREEN’;
dequeue_options.navigation := FIRST_MESSAGE;
LOOP
DBMS_AQ.DEQUEUE(queue_name => ’msg_queue_multiple’,
dequeue_options => dequeue_options,
message_properties => message_properties,
payload => message,
msgid => message_handle);
DBMS_OUTPUT.PUT_LINE (’Message: ’ || message.subject ||
’ ... ’ || message.text );
dequeue_options.navigation := NEXT_MESSAGE;
END LOOP;
EXCEPTION
WHEN no_messages THEN
DBMS_OUTPUT.PUT_LINE (’No more messages for GREEN’);
COMMIT;
END;
Enqueuing and Dequeuing Of Messages
Enqueuing and Dequeuing of Messages to/from a Multiconsumer Queue using OCI
Note: You may need to set up the following data structures for
certain examples to work:
CONNECT aqadm/aqadm
EXECUTE DBMS_AQADM.CREATE_QUEUE_TABLE(
queue_table => ’aq.qtable_multi’,
multiple_consumers => true,
queue_payload_type => ’aq.message_typ’);
EXECUTE DBMS_AQADM.START_QUEUE(’aq.msg_queue_multiple’);
CONNECT aq/aq
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Oracle Advanced Queuing by Example A-47