79 lines
2.5 KiB
HTML
79 lines
2.5 KiB
HTML
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<meta name="Copyright" content="Copyright (c) 2006 by IBM Corporation">
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<title>Using User Queue APIs</title>
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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<!-- Use, duplication or disclosure restricted by -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<!-- Change History: -->
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<!-- YYMMDD USERID Change description -->
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<!-- End Header Records -->
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<link rel="stylesheet" type="text/css" href="../rzahg/ic.css">
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</head>
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<body>
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<!-- Java sync-link -->
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<script type="text/javascript" language="Javascript" src="../rzahg/synch.js">
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</script>
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<a name="Top_Of_Page"></a>
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<h2>Using User Queue APIs</h2>
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<p>You can use user queues to:</p>
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<ul>
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<li>Communicate between two processes asynchronously.</li>
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<li>Store data in arrival sequence for later use.</li>
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<li>Contain keyed messages.</li>
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<li>Create a batch machine. (For an example, see
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<a href="../apiref/apiexcremac.htm">Creating a Batch Machine</a> in
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API Examples.)</li>
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<li>Permit better performance than the data queue interface.</li>
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</ul>
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<p>You can save and restore a user queue; however, you can save or restore its
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definition only. You cannot save or restore the messages in it. You cannot
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restore a user queue if a user queue with the same name already exists in the
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library. You must provide programs to use this object type to enqueue and
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dequeue messages.</p>
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<p> In addition to the user queue APIs, you can work with user queues through
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the following:</p>
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<ul>
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<li>ILE C programming language</li>
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<li>Delete User Queue (DLTUSRQ) command</li>
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<li>Machine interface (MI) instructions</li>
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</ul>
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<p>For details about MI instructions, refer to the
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<a href="../rzatk/mitoc.htm">iSeries
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Machine Interface Instructions</a>, which provides detailed descriptions of the
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iSeries<SUP>(TM)</SUP> machine interface instruction fields and the formats of those fields.
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For details about the DLTUSRQ command, see the
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<a href="../rbam6/rbam6clmain.htm">Control Language</a> topic.</p>
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<br>
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<hr>
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<center>
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<table cellpadding="2" cellspacing="2">
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<tr align="center">
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<td valign="middle" align="center">
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<a href="obj1.htm">Object APIs</a> |
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<a href="aplist.htm">APIs by category</a></td>
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</tr>
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</table>
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</center>
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</body>
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</html>
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