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Advanced Queuing - Oracle

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Enqueuing and Dequeuing Of Messages<br />

message aq.message_typ;<br />

BEGIN<br />

dequeue_options.dequeue_mode := dbms_aq.LOCKED;<br />

LOOP<br />

dbms_aq.dequeue(queue_name => ’msg_queue’,<br />

dequeue_options => dequeue_options,<br />

message_properties => message_properties,<br />

payload => message,<br />

msgid => message_handle);<br />

dbms_output.put_line (’Message: ’ || message.subject ||<br />

’ ... ’ || message.text );<br />

EXIT WHEN message.subject = ’BLUE’;<br />

END LOOP;<br />

dequeue_options.dequeue_mode := dbms_aq.REMOVE;<br />

dequeue_options.msgid := message_handle;<br />

dbms_aq.dequeue(queue_name => ’msg_queue’,<br />

dequeue_options => dequeue_options,<br />

message_properties => message_properties,<br />

payload => message,<br />

msgid => message_handle);<br />

DBMS_OUTPUT.PUT_LINE (’Message: ’ || message.subject ||<br />

’ ... ’ || message.text );<br />

END;<br />

COMMIT;<br />

A-36 <strong>Oracle</strong>9i Application Developer’s Guide - <strong>Advanced</strong> <strong>Queuing</strong>

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