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Advanced Queuing - Oracle

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JMS Message Consumer Features<br />

}<br />

enqueue_order(jms_session, neworders_q, 3, null, 0, 2,<br />

"Scott’s third book");<br />

jms_session.commit();<br />

}<br />

catch (Exception ex)<br />

{<br />

System.out.println("Exception ex: " + ex);<br />

}<br />

JMS Message Consumer Features<br />

Receiving Messages<br />

Receiving Messages<br />

Message Navigation in Receive<br />

Modes for Receiving Messages<br />

Retry With Delay Interval<br />

Asynchronously Receiving Message Using Message Listener<br />

AQ Exception Handling<br />

A JMS application can receive messages by creating a message consumer. Messages<br />

can be received synchronously using the receive call or an synchronously using a<br />

Message Listener.<br />

There are three modes of receive,<br />

block until a message arrives for a consumer<br />

<br />

block for a maximum of the specified time<br />

nonblocking<br />

Example Code: Block Until a Message Arrives<br />

public BolOrder get_new_order1(QueueSession jms_session)<br />

{<br />

Queue queue;<br />

QueueReceiver qrec;<br />

12-66 <strong>Oracle</strong>9i Application Developer’s Guide - <strong>Advanced</strong> <strong>Queuing</strong>

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