80 lines
5.0 KiB
HTML
80 lines
5.0 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="DC.Type" content="reference" />
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<meta name="DC.Title" content="Service program call" />
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<meta name="abstract" content="" />
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<meta name="description" content="" />
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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="spgcall" />
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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>Service program call</title>
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</head>
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<body id="spgcall"><a name="spgcall"><!-- --></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"><strong>Service program call</strong></h1>
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<div><p></p>
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<div class="section"><p>The <a href="javadoc/com/ibm/as400/access/ServiceProgramCall.html"> ServiceProgramCall</a> class allows you to call an iSeries™ service
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program. ServiceProgramCall is a subclass of the <a href="javadoc/com/ibm/as400/access/ProgramCall.html">ProgramCall</a> class that you use to call iSeries programs.
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If you want to call an iSeries program, use the ProgramCall class.</p>
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</div>
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<div class="section"><p>The ServiceProgramCall class makes it possible for you to call
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an iSeries service
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program, pass data to an iSeries service program through input parameters,
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and access data the iSeries service program returns through output parameters.
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Using ServiceProgramCall causes the AS400 object to connect to the iSeries. See <a href="mngcon.htm#mngcon">managing connections</a> for information about
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managing connections.</p>
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</div>
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<div class="section"><p>The default behavior is for service programs to run in a separate
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server job, even when the Java™ program and the service program are
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on the same server. You can override the default behavior and have the service
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program run in the Java job using the inherited (from ProgramCall)
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<a href="javadoc/com/ibm/as400/access/ProgramCall.html#SETTHREADSAFE(BOOLEAN)">setThreadSafe()</a> method.</p>
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</div>
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<div class="section"><p><strong>Using the ServiceProgramCall class</strong></p>
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</div>
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<div class="section"><p>In order to use the ServiceProgramCall class, you must be sure
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to meet the following requirements:</p>
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</div>
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<div class="section"><ul><li>The service program must be on an iSeries</li>
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<li>You can pass no more than seven parameters to the service program</li>
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<li>The return value of the service program is void or numeric</li>
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</ul>
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</div>
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<div class="section"><p><strong>Working with ProgramParameter objects</strong></p>
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</div>
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<div class="section"><p>The <a href="javadoc/com/ibm/as400/access/ProgramParameter.html"> ProgramParameter</a> class works with the ServiceProgramCall
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class to pass parameter data to and from an iSeries service program. You pass input
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data to the iSeries service
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program with <a href="javadoc/com/ibm/as400/access/ProgramParameter.html#SETINPUTDATA(BYTE[])">setInputData()</a>.</p>
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</div>
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<div class="section"><p>You request the amount of output data you want returned with <a href="javadoc/com/ibm/as400/access/ProgramParameter.html#SETOUTPUTDATALENGTH(INT)">setOutputDataLength()</a>. You retrieve the output data
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after the service program is finished running with <a href="javadoc/com/ibm/as400/access/ProgramParameter.html#GETOUTPUTDATA()">getOutputData()</a>. In addition to the data itself, ServiceProgramCall
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needs to know how to pass parameter data to the service program. The <a href="javadoc/com/ibm/as400/access/ProgramParameter.html#SETPARAMETERTYPE(INT)">setParameterType()</a> method of ProgramParameter is used
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to supply this information. The type indicates if the parameter is pass by
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value or pass by reference. In either case, data is sent from the client
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to the server. Once the data is on the iSeries, the server uses the parameter
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type to correctly call the service program.</p>
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</div>
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<div class="section"><p>All parameters will be in the form of a byte array. Therefore,
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to convert between iSeries and Java formats, you use the <a href="dtad.htm#dtad">data
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conversion and description</a> classes.</p>
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</div>
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</div>
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</body>
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</html>
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