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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=us-ascii" /> <meta http-equiv="Content-Style-Type" content="text/css" /> <meta http-equiv="Content-Script-Type" content="text/javascript" /> <title>Task 6: Dequeuing Messages</title> <meta name="generator" content="Oracle DARB XHTML Converter (Mode = ohj/ohw) - Version 5.1.1 Build 005" /> <meta name="date" content="2009-06-04T17:1:2Z" /> <meta name="robots" content="noarchive" /> <meta name="doctitle" content="Task 6: Dequeuing Messages" /> <meta name="relnum" content="11g Release 2 (11.2)" /> <meta name="partnum" content="E10703-01" /> <link rel="copyright" href="./dcommon/html/cpyr.htm" title="Copyright" type="text/html" /> <link rel="stylesheet" href="./dcommon/css/blafdoc.css" title="Oracle BLAFDoc" type="text/css" /> <link rel="contents" href="toc.htm" title="Contents" type="text/html" /> <link rel="prev" href="tdpii_messaging013.htm" title="Previous" type="text/html" /> <link rel="next" href="tdpii_messaging015.htm" title="Next" type="text/html" /> <script src="./callback.js" type="text/javascript"></script> <noscript>Your browser does not support JavaScript. This help page requires JavaScript to render correctly.</noscript> </head> <body> <div class="zz-skip-header"><a href="#BEGIN">Skip Headers</a></div> <table class="simple oac_no_warn" summary="" cellspacing="0" cellpadding="0" width="100%"> <col width="86%" /> <col width="*" /> <tr valign="bottom"> <td align="left"></td> <td align="center"><a href="tdpii_messaging013.htm"><img src="./dcommon/gifs/leftnav.gif" alt="Previous" /><br /> <span class="icon">Previous</span></a> </td> <td align="center"><a href="tdpii_messaging015.htm"><img src="./dcommon/gifs/rightnav.gif" alt="Next" /><br /> <span class="icon">Next</span></a></td> </tr> </table> <p><a id="CHDJEJEE" name="CHDJEJEE"></a><a id="TDPII041" name="TDPII041"></a></p> <div class="sect2"><!-- infolevel="all" infotype="General" --> <h1>Task 6: Dequeuing Messages<a id="sthref616" name="sthref616"></a><a id="sthref617" name="sthref617"></a></h1> <a name="BEGIN" id="BEGIN"></a> <p>The example in <a href="tdpii_messaging013.htm#CHDBIDGD">"Task 5: Enqueuing Messages"</a> enqueues messages into the <code>strmadmin.streams_queue</code> queue in the <code>ii1.example.com</code> database. After messages are enqueued, the propagation configured in <a href="tdpii_messaging010.htm#CHDHBBDJ">"Task 2: Configuring the Queues and Propagation Between Them"</a> sends the messages to the <code>strmadmin.streams_queue</code> queue in the <code>ii2.example.com</code> database.</p> <p>This example dequeues the messages from the queue in the <code>ii2.example.com</code> database using the <code>dequeue_orders</code> procedure created in <a href="tdpii_messaging012.htm#CHDHGJAG">"Task 4: Configuring a Messaging Client to Dequeue Messages"</a>.</p> <p class="orderedlisttitle">To dequeue messages: </p> <ol> <li> <p>Optionally, check to see if the messages have arrived in the <code>strmadmin.streams_queue</code> queue at <code>ii2.example.com</code> before you attempt to dequeue them. It might take time for the propagation to send messages from the queue at <code>ii1.example.com</code> to the queue at <code>ii2.example.com</code>. See <a href="tdpii_messaging025.htm#BABBAHDB">"Viewing the Messages in a Queue"</a> for instructions.</p> <p>Three messages should appear on the Messages page. Each message contains information about an order you inserted into the <code>oe.orders</code> table in <a href="tdpii_messaging013.htm#CHDBIDGD">"Task 5: Enqueuing Messages"</a>.</p> </li> <li> <p>On a command line, open SQL*Plus and connect to the <code>ii2.example.com</code> database as the Oracle Streams administrator.</p> <p>See <a href="topicid:ADMQS0361">Starting SQL*Plus and Connecting to the Database</a> for more information about starting SQL*Plus.</p> </li> <li> <p>In SQL*Plus, run the <code>dequeue_orders</code> procedure:</p> <pre xml:space="preserve" class="oac_no_warn"> SET SERVEROUTPUT ON exec dequeue_orders; </pre> <p>The output will be similar to the following:</p> <pre xml:space="preserve" class="oac_no_warn"> <span class="bold">Order ID: 3000</span> <span class="bold">Order Date: 01-FEB-07 01.47.48.000000000 PM</span> <span class="bold">Order ID: 3001</span> <span class="bold">Order Date: 01-FEB-07 01.47.57.000000000 PM</span> <span class="bold">Order ID: 3002</span> <span class="bold">Order Date: 01-FEB-07 01.48.04.000000000 PM</span> <span class="bold">No more messages.</span> <span class="bold">PL/SQL procedure successfully completed.</span> </pre></li> </ol> <div class="helpinfonotealso"> <h2>Related Topics</h2> <p><a href="tdpii_messaging008.htm#CHDBACBE">Tutorial: Sending Messages Between Oracle Databases</a></p> <p><a href="tdpii_messaging001.htm#CHDIJFHB">About Messaging</a></p> </div> </div> <!-- class="sect2" --> <!-- class="sect1" --> <!-- Start Footer --> <div class="footer"> <table class="simple oac_no_warn" summary="" cellspacing="0" cellpadding="0" width="100%"> <col width="86%" /> <col width="*" /> <tr> <td align="left"><span class="copyrightlogo">Copyright © 2007, 2009, Oracle and/or its affiliates. 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