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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>Viewing the Consumers Who Can Dequeue Messages</title> <meta name="generator" content="Oracle DARB XHTML Converter (Mode = ohj/ohw) - Version 5.1.1 Build 005" /> <meta name="date" content="2009-06-04T17:1:3Z" /> <meta name="robots" content="noarchive" /> <meta name="doctitle" content="Viewing the Consumers Who Can Dequeue 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_messaging026.htm" title="Previous" type="text/html" /> <link rel="next" href="tdpii_messaging028.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_messaging026.htm"><img src="./dcommon/gifs/leftnav.gif" alt="Previous" /><br /> <span class="icon">Previous</span></a> </td> <td align="center"><a href="tdpii_messaging028.htm"><img src="./dcommon/gifs/rightnav.gif" alt="Next" /><br /> <span class="icon">Next</span></a></td> </tr> </table> <p><a id="BABBJDHF" name="BABBJDHF"></a><a id="TDPII163" name="TDPII163"></a></p> <div class="sect2"><!-- infolevel="all" infotype="General" --> <h1>Viewing the Consumers Who Can Dequeue Messages<a id="sthref668" name="sthref668"></a><a id="sthref669" name="sthref669"></a><a id="sthref670" name="sthref670"></a><a id="sthref671" name="sthref671"></a></h1> <a name="BEGIN" id="BEGIN"></a> <p>Consumers are configured to dequeue messages from a specific queue. In a messaging environment, consumers are represented by subscribers to a queue, and more than one consumer might use a single subscriber.</p> <p>Consumers can be:</p> <ul> <li> <p>Applications or users that dequeue and process messages</p> </li> <li> <p>Propagations that send messages from one queue to another</p> </li> <li> <p>Apply processes that can dequeue messages for custom processes in a messaging environment or dequeue changes to database objects in a replication environment</p> </li> </ul> <p class="orderedlisttitle">To view the consumers who can dequeue messages from a specific queue: </p> <ol> <li> <p>In Oracle Enterprise Manager, log in to the database as the Oracle Streams administrator.</p> </li> <li> <p>Go to the Database Home page.</p> </li> <li> <p>Click <span class="bold">Data Movement</span> to open the Data Movement subpage.</p> </li> <li> <p>Click <img src="shortcut.png" alt="callback" border="0" /><a href="javascript:void(0);" onclick="redirectEMpage('STREAMS_MESSAGING');"><span class="bold">Manage Advanced Queues</span></a> to open the Streams page.</p> </li> <li> <p>Select the queue. If necessary, use the search tool to find the queue, and then select it.</p> </li> <li> <p>Select <span class="bold">Subscribers</span> in the Actions list.</p> </li> <li> <p>Click <span class="bold">Go</span> to open the Subscribers page.</p> </li> </ol> <p>The Subscribers page includes the following information about each subscriber to the queue:</p> <ul> <li> <p>The Name field contains the name of the subscriber.</p> </li> <li> <p>The Address field is typically populated if the subscriber is a propagation that sends messages to another queue. The Address field shows the name of the queue that receives the messages.</p> </li> <li> <p>The Database Link field shows the database link to a remote database if the subscriber is at the remote database.</p> </li> <li> <p>The Rule field shows the rule used by the subscriber. Rules can determine which messages are dequeued by the subscriber. Some subscribers do not use rules.</p> </li> <li> <p>The Transformation field shows the transformation used by the subscriber. Transformations modify messages while they are being dequeued. Some subscribers do not use transformations.</p> </li> </ul> <div class="helpinfonote"> <p><span class="bold">Note: </span>You can also query the <a href="javascript:open('http://www.oracle.com/pls/db112/lookup?id=REFRN20544','newWindow').focus()"><code>ALL_QUEUE_SUBSCRIBERS</code></a> data dictionary to view the consumers who can dequeue messages.</p> </div> <div class="helpinfonotealso"> <h2>Related Topics</h2> <p><a href="tdpii_messaging001.htm#CHDIJFHB">About Messaging</a></p> <p><a href="tdpii_repcont006.htm#BABBAJFE">About Change Apply</a></p> <p><a href="tdpii_messaging024.htm#CHDDICBF">Monitoring a Messaging Environment</a></p> <p><a href="tdpii_messaging025.htm#BABBAHDB">Viewing the Messages in a Queue</a></p> <p><a href="tdpii_messaging026.htm#BABCJJGF">Viewing Persistent Queue Statistics</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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