162 lines
8.6 KiB
HTML
162 lines
8.6 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 name="Robots" content="index,follow" />
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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="i5/OS optimization" />
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<meta name="abstract" content="The IBM Toolbox for Java licensed program is written in Java, so it runs on any platform with a certified Java virtual machine (JVM). The IBM Toolbox for Java classes function in the same way no matter where they run." />
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<meta name="description" content="The IBM Toolbox for Java licensed program is written in Java, so it runs on any platform with a certified Java virtual machine (JVM). The IBM Toolbox for Java classes function in the same way no matter where they run." />
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<meta name="DC.Relation" scheme="URI" content="progtips.htm" />
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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="opt" />
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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>i5/OS optimization</title>
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</head>
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<body id="opt"><a name="opt"><!-- --></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">i5/OS optimization</h1>
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<div><p>The IBM<sup>®</sup> Toolbox
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for Java™ licensed
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program is written in Java, so it runs on any platform with a
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certified Java virtual machine (JVM). The IBM Toolbox for Java classes function in the same way no
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matter where they run.</p>
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<div class="section"><p>Additional classes come with i5/OS™ that enhance the behavior of the IBM Toolbox
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for Java when
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it is running on the iSeries™ JVM. Sign-on behavior and performance are
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improved when running on the iSeries JVM and connecting to the same iSeries server.
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i5/OS incorporated
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the additional classes starting at Version 4 Release 3.</p>
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</div>
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<div class="section"><h4 class="sectiontitle">Enabling the optimizations</h4><p>IBM Toolbox for Java comes in two packages: as a separate
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licensed program and with i5/OS.</p>
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<ul><li>Licensed Program 5722-JC1. The licensed program version of IBM Toolbox for
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Java ships
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files in the following directory:<pre> /QIBM/ProdData/http/public/jt400/lib</pre>
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<p> These
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files do not contain i5/OS optimizations. Use these files if you want behavior
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consistent with running the IBM Toolbox for Java on a client.</p>
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</li>
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<li>i5/OS. IBM Toolbox
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for Java is
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also shipped with i5/OS in directory<pre> /QIBM/ProdData/OS400/jt400/lib</pre>
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<p> These
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files do contain the classes that optimize the IBM Toolbox for Java when running on the iSeries JVM.</p>
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<p>For
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more information see <a href="jarfilelist.htm#jarfilelist__jt400classic">Note
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1</a> in the information about <a href="jarfilelist.htm#jarfilelist">Jar
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files</a>.</p>
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</li>
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</ul>
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</div>
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<div class="section"><h4 class="sectiontitle">Sign-on considerations</h4><p>With the additional classes
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provided with i5/OS, Java programs
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have additional options for providing server (system) name, user ID and password
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information to the IBM Toolbox for Java.</p>
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<p>When accessing a resource on
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an iSeries server,
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the IBM Toolbox
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for Java classes
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must have a system name, user ID and password.</p>
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<ul><li><strong>When running on a client</strong>, the system name, user ID and password
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are provided by the Java program, or the IBM Toolbox for Java retrieves these values from the user
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through a sign-on dialog.</li>
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<li><strong>When running on the iSeries Java virtual machine</strong>, the IBM Toolbox for Java has
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one more option. It can send requests to the current (local) server using
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the user ID and password of the job that started the Java program.</li>
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</ul>
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<p>With the additional classes, the user ID and password of the current
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job also can be used when a Java program that is running on one iSeries server
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accesses the resources on another iSeries server. In this case, the Java program
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sets the system name, then uses the special value "*current" for the user
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ID and password.</p>
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<p>The Java program can only set the password to
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"*current" if you are using record-level access V4R4 or later. Otherwise,
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when you use record-level access, "localhost" is valid for system name and
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"*current" is valid for user ID; however, the Java program must supply the password.</p>
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<p>A Java program
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sets system name, user ID, and password values in the <a href="javadoc/com/ibm/as400/access/AS400.html#NAVBAR_TOP"> AS400</a> object.</p>
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<p>To use the user ID and password
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of the job, the Java program can use "*current" as user ID and password,
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or it can use the constructor that does not have user ID and password parameters.</p>
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<p>To
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use the current server, the Java program can use "localhost" as the
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system name or use the default constructor. That is,</p>
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<pre> AS400 system = new AS400();</pre>
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<p> is
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the same as </p>
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<pre> AS400 system = new AS400("localhost", "*current", "*current");</pre>
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</div>
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<div class="section"><h4 class="sectiontitle">Examples</h4><p>The following examples show how to sign
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on to a server by using optimized classes.</p>
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<p id="opt__optex1"><a name="opt__optex1"><!-- --></a><strong>Example: Signing
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on when using different AS400 constructors</strong></p>
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<p>Two AS400 objects are
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created in the following example. The two objects have the same behavior:
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they both run a command to the current server using the user ID and password
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of the job. One object uses the special value for the user ID and password,
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while the other uses the default constructor and does not set user ID or
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password.</p>
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<pre> // Create an AS400 object. Since the default
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// constructor is used and system, user ID and
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// password are never set, the AS400 object sends
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// requests to the local iSeries using the job's
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// user ID and password. If this program were run
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// on a client, the user would be prompted for
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// system, user ID and password.
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AS400 sys1 = new AS400();
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// Create an AS400 object. This object sends
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// requests to the local iSeries using the job's
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// user ID and password. This object will not work
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// on a client.
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AS400 sys2 = new AS400("localhost", "*current", "*current");
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// Create two command call objects that use the
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// AS400 objects.
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CommandCall cmd1 = new CommandCall(sys1,"myCommand1");
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CommandCall cmd2 = new CommandCall(sys2,"myCommand2");
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// Run the commands.
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cmd1.run();
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cmd2.run();</pre>
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<p id="opt__optex2"><a name="opt__optex2"><!-- --></a><strong>Example: Signing on by using
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the user ID and password of the current job</strong></p>
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<p>In the following example
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an AS400 object is created that represents a second iSeries server. Since "*current" is used,
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the job's user ID and password from the iSeries server running the Java program
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are used on the second (target) server.</p>
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<pre> // Create an AS400 object. This object sends
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// requests to a second iSeries using the user ID
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// and password from the job on the current server.
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AS400 sys = new AS400("mySystem.myCompany.com", "*current", "*current");
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// Create a command call object to run a command
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// on the target server.
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CommandCall cmd = new CommandCall(sys,"myCommand1");
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// Run the command.
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cmd.run();</pre>
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</div>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="progtips.htm" title="This section features a variety of tips that can help you use IBM Toolbox for Java.">Tips for programming</a></div>
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</div>
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</div>
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</body>
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</html>
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