62 lines
4.2 KiB
HTML
62 lines
4.2 KiB
HTML
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html lang="en-us" xml:lang="en-us">
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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="security" content="public" />
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<meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' />
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<meta name="DC.Type" content="reference" />
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<meta name="DC.Title" content="Sequential data queues" />
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<meta name="abstract" content="Entries on a sequential data queue on the server are removed in first-in first-out (FIFO) or last-in first-out (LIFO) sequence." />
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<meta name="description" content="Entries on a sequential data queue on the server are removed in first-in first-out (FIFO) or last-in first-out (LIFO) sequence." />
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<meta name="copyright" content="(C) Copyright IBM Corporation 2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 2006" />
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<meta name="DC.Format" content="XHTML" />
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<meta name="DC.Identifier" content="dtaqseq" />
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<meta name="DC.Language" content="en-us" />
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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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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>Sequential data queues</title>
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</head>
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<body id="dtaqseq"><a name="dtaqseq"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Sequential data queues</h1>
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<div><p>Entries on a sequential data queue on the server are removed in
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first-in first-out (FIFO) or last-in first-out (LIFO) sequence.</p>
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<div class="section"><p> The <a href="javadoc/com/ibm/as400/access/BaseDataQueue.html#NAVBAR_TOP"> BaseDataQueue</a> and <a href="javadoc/com/ibm/as400/access/DataQueue.html#NAVBAR_TOP"> DataQueue</a> classes provide the following methods for
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working with sequential data queues:</p>
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<ul><li><a href="javadoc/com/ibm/as400/access/DataQueue.html#CREATE(COM.IBM.AS400.ACCESS.DATAQUEUEATTRIBUTES)"> Create</a> a data queue on the server. The Java™ program
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must specify the maximum size of an entry on the data queue. The Java program
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can optionally specify additional data queue parameters (FIFO vs LIFO, save
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sender information, specify authority information, force to disk, and provide
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a queue description) when the queue is created.</li>
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<li><a href="javadoc/com/ibm/as400/access/DataQueue.html#PEEK()"> Peek</a> at an entry on the data queue without removing
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it from the queue. The Java program can wait or return immediately
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if no entry is currently on the queue.</li>
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<li><a href="javadoc/com/ibm/as400/access/DataQueue.html#READ()"> Read</a> an entry off the queue. The Java program
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can wait or return immediately if no entry is available on the queue.</li>
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<li><a href="javadoc/com/ibm/as400/access/DataQueue.html#WRITE(BYTE[])"> Write</a> an entry to the queue.</li>
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<li><a href="javadoc/com/ibm/as400/access/BaseDataQueue.html#CLEAR()">Clear</a> all entries from the queue.</li>
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<li><a href="javadoc/com/ibm/as400/access/BaseDataQueue.html#DELETE()"> Delete</a> the queue.</li>
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</ul>
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<p>The BaseDataQueue class provides additional methods for retrieving
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the attributes of the data queue.</p>
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</div>
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<div class="section"><h4 class="sectiontitle">Examples: Working with sequential data queues</h4><p>The
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following sequential data queue examples illustrate how a producer puts items
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on a data queue and how a consumer takes the items off the queue and processes
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them:</p>
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<blockquote><p><a href="dqproducerexample.htm#dqproducerexample">Example: Using DataQueue classes to put data on a queue</a></p>
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<p><a href="dqconsumerexample.htm#dqconsumerexample">Example: Using DataQueue classes to read entries off a data queue</a></p>
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</blockquote>
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</div>
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</div>
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</body>
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</html>
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