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PORPG calling Java, java.lang.NoClassDefFoundError
 

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    <p>My aim is to call a Web Service from Java, initiated from a RPG function. (I know, its long way around, but it is what we need)</p> <p>I have created a <code>/JavaLib</code> folder on the AS400, and copied all our needed External Jars we need.</p> <p>Create a Java class with a static method <code>WebServiceCaller.Call()</code> to call a Web Service. When ever I run my RPG program everything is fine unto the RPG calls this method.</p> <p>I get a Java exception:</p> <blockquote> <p>Message . . . . : Java exception received when calling Java method (C G D F).<br> Cause . . . . . : RPG procedure WEBSERCALR in program WAL60326/WEBSERCALR received Java exception "java.lang.NoClassDefFoundError:<br> javax.xml.rpc.ServiceException" when calling method "Call" with signature "(LwebService.Input;)LwebService.Output;" in class<br> "webService.WebServiceCaller". </p> </blockquote> <p>CLASSPATH variable:</p> <blockquote> <p>/JavaLib:/home/WAL60326/WebServiceCaller</p> </blockquote> <p>So I believe my RPG and Java Class is fine, and I believe I have setup my CLASSPATH variable right. Not sure what else there is to check. </p> <hr> <h2>Update</h2> <p>So the jar file I need is <code>jaxrpc.jar</code> I have checked; it does exists in my <code>/JavaLib</code>. Was able to check my Java version on the AS400 <code>java version "1.5.0"</code>. And follow these <a href="http://itknowledgeexchange.techtarget.com/itanswers/how-can-be-check-os-version-in-as400/" rel="nofollow">instructions</a> to check that my OS is V6R1.</p> <p>Could it be my Java version that is out of date, for this Jar file to be loaded/work? Is that even a possibility?</p> <hr> <h2>Edit</h2> <p>Here is my source code:</p> <p>Java: WebServiceCaller.Java</p> <pre><code>package webService; import java.rmi.RemoteException; import stocklistGetBids.GetBidsProxy; public class WebServiceCaller { public static Output Call(Input in) { // Input Class, is just a way to hold all the input together Output out = null; // Output Class, holds all the output together try { GetBidsProxy getBidsProxy = new GetBidsProxy(); // GetBidsProxy generated by Eclipse out = new Output(getBidsProxy.getBids(in.LogKey, in.Id)); } catch (RemoteException e) { e.printStackTrace(); out = new Output("ERR"); } return out; } } </code></pre> <p>Take note that the GetBidsProxy class in generated by Eclipse. And the Java side works well on my Windows Machine. Just not on the AS400 Machine.</p> <p>RPG: WEBSERCALR.RPGLE</p> <pre><code> H DFTACTGRP(*NO) H thread(*serialize) D WebsercalInput DS D ReturnCode 7A D LogKey 20A D ID 20A D jString S O CLASS(*JAVA:'java.lang.String') D jLogKey S O CLASS(*JAVA:'java.lang.String') D jID S O CLASS(*JAVA:'java.lang.String') D Input S O CLASS(*JAVA:'webService.Input') D Output S O CLASS(*JAVA:'webService.Output') D new_Input PR O EXTPROC(*JAVA: D 'webService.Input': D *CONSTRUCTOR) D LogKey like(jString) D ID like(jString) D new_String PR O EXTPROC(*JAVA: D 'java.lang.String': D *CONSTRUCTOR) D bytes 30A CONST VARYING D Call PR like(Output) D EXTPROC(*JAVA: D 'webService.WebServiceCaller': D 'Call') D STATIC D in like(Input) D getReturnStat PR O EXTPROC(*JAVA: D 'webService.Output': D 'getReturnedStatus') D CLASS(*JAVA:'java.lang.String') D getBytes PR 65535A VARYING D EXTPROC(*JAVA: D 'java.lang.String': D 'getBytes') C *ENTRY PLIST C PARM WebsercalInput /free jLogKey = new_String(LogKey); jID = new_String(ID); Input = new_Input(jLogKey:jID); Output = Call(Input); jString = getReturnStat(Output); ReturnCode = getBytes(jString); return; /End-Free </code></pre>
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    1. COVoting up for nostalgia reasons trying to get RPG to work with Java.
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    2. COYou might have to enumerate the jars in `/JavaLib` in the classpath.
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    3. COYour exception suggests that not all JAR's (classes) are available or failed to load -> `java.lang.NoClassDefFoundError: javax.xml.rpc.ServiceException` Check which JAR the class `ServiceException` belongs to and make sure your RPG can load it.
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