169 lines
8.5 KiB
HTML
169 lines
8.5 KiB
HTML
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<meta name="DC.Title" content="ProgramCall class" />
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<title>ProgramCall class</title>
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<body id="pgmc"><a name="pgmc"><!-- --></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">ProgramCall class</h1>
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<div><p></p>
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<div class="section"><p>The <a href="javadoc/com/ibm/as400/access/ProgramCall.html#NAVBAR_TOP"> ProgramCall</a> class allows the Java™ program
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to call an iSeries™ program.
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You can use the <a href="javadoc/com/ibm/as400/access/ProgramParameter.html#NAVBAR_TOP"> ProgramParameter</a> class to specify input, output, and
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input/output parameters. If the program runs, the output and input/output
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parameters contain the data that is returned by the iSeries program. If the iSeries program
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fails to run successfully, the Java program can retrieve any resulting iSeries messages
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as a list of <a href="javadoc/com/ibm/as400/access/AS400Message.html#NAVBAR_TOP"> AS400Message</a> objects.</p>
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<p>Required parameters are
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as follows:</p>
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<ul><li>The program and parameters to run</li>
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<li>The <a href="javadoc/com/ibm/as400/access/AS400.html#NAVBAR_TOP">AS400</a> object that represents the iSeries server that has the program.</li>
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</ul>
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<p>The program name and parameter list can be set on the constructor,
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through the <a href="javadoc/com/ibm/as400/access/ProgramCall.html#SETPROGRAM(JAVA.LANG.STRING)"> setProgram()</a> method, or on the <a href="javadoc/com/ibm/as400/access/ProgramCall.html#RUN()">run()</a> method The run() method calls the program.</p>
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<p>Using
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the ProgramCall class causes the AS400 object to connect to the iSeries server.
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See <a href="mngcon.htm#mngcon">managing connections</a> for information
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about managing connections.</p>
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</div>
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<div class="section" id="pgmc__pgmcex1"><a name="pgmc__pgmcex1"><!-- --></a><p><strong>Example: Using ProgramCall</strong></p>
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<div class="note"><span class="notetitle">Note:</span> Read
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the <a href="codedisclaimer.htm#codedisclaimer">Code example disclaimer</a> for
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important legal information.</div>
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<p>The following example shows how to use
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the ProgramCall class:</p>
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<pre> // Create an AS400 object.
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AS400 sys = new AS400("mySystem.myCompany.com");
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// Create a program object. I choose
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// to set the program to run later.
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ProgramCall pgm = new ProgramCall(sys);
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// Set the name of the program.
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// Because the program does not take
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// any parameters, pass null for the
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// ProgramParameter[] argument.
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pgm.setProgram(QSYSObjectPathName.toPath("MYLIB", "MYPROG", "PGM"));
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// Run the program. My program has
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// no parms. If it fails to run, the failure
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// is returned as a set of messages
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// in the message list.
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if (pgm.run() != true)
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{
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// If you get here, the program
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// failed to run. Get the list of
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// messages to determine why the
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// program didn't run.
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AS400Message[] messageList = pgm.getMessageList();
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// ... Process the message list.
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}
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// Disconnect since I am done
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// running programs
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sys.disconnectService(AS400.COMMAND);</pre>
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<p>The ProgramCall object
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requires the <a href="ifspath.htm#ifspath"> integrated file system path
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name</a> of the program.</p>
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<p>The default behavior is for iSeries programs
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to run in a separate server job, even when the Java program and the iSeries program are on the same server.
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You can override the default behavior and have the iSeries program run in the Java job
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using the <a href="javadoc/com/ibm/as400/access/CommandCall.html#SETTHREADSAFE(BOOLEAN)"> setThreadSafe()</a> method.</p>
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</div>
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<div class="section" id="pgmc__usingprogparamobjects"><a name="pgmc__usingprogparamobjects"><!-- --></a><h4 class="sectiontitle">Using ProgramParameter objects</h4><p>You
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can use the <a href="javadoc/com/ibm/as400/access/ProgramParameter.html#NAVBAR_TOP"> ProgramParameter objects</a> to pass parameter data between
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the Java program
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and the iSeries program.
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Set the input data with the <a href="javadoc/com/ibm/as400/access/ProgramParameter.html#SETINPUTDATA(BYTE[])"> setInputData()</a> method. After the program is run, retrieve
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the output data with the <a href="javadoc/com/ibm/as400/access/ProgramParameter.html#GETOUTPUTDATA()"> getOutputData()</a> method. Each parameter is a byte array.
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The Java program
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must convert the byte array between Java and iSeries formats. The <a href="dtad.htm#dtad">data
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conversion</a> classes provide methods for converting data. Parameters
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are added to the ProgramCall object as a list.</p>
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</div>
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<div class="section" id="pgmc__pgmcex2"><a name="pgmc__pgmcex2"><!-- --></a><p><strong>Example: Using ProgramParameter</strong></p>
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<div class="note"><span class="notetitle">Note:</span> Read
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the <a href="codedisclaimer.htm#codedisclaimer">Code example disclaimer</a> for
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important legal information.</div>
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<p>The following example shows how to use
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the ProgramParameter object to pass parameter data.</p>
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<pre> // Create an AS400 object
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AS400 sys = new AS400("mySystem.myCompany.com");
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// My program has two parameters.
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// Create a list to hold these
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// parameters.
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ProgramParameter[] parmList = new ProgramParameter[2];
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// First parameter is an input
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// parameter
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byte[] key = {1, 2, 3};
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parmList[0] = new ProgramParameter(key);
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// Second parameter is an output
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// parameter. A four-byte number
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// is returned.
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parmList[1] = new ProgramParameter(4);
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// Create a program object
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// specifying the name of the
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// program and the parameter list.
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ProgramCall pgm = new ProgramCall(sys, "/QSYS.LIB/MYLIB.LIB/MYPROG.PGM", parmList);
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// Run the program.
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if (pgm.run() != true)
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{
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// If the iSeries cannot run the
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// program, look at the message list
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// to find out why it didn't run.
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AS400Message[] messageList = pgm.getMessageList();
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}
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else
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{
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// Else the program ran. Process the
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// second parameter, which contains
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// the returned data.
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// Create a converter for this
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// iSeries data type
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AS400Bin4 bin4Converter = new AS400Bin4();
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// Convert from iSeries type to Java
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// object. The number starts at the
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// beginning of the buffer.
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byte[] data = parmList[1].getOutputData();
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int i = bin4Converter.toInt(data);
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}
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// Disconnect since I am done
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// running programs
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sys.disconnectService(AS400.COMMAND);</pre>
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</div>
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</div>
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