Re: Call RPG from Java using ToolBox - run on PC and fail on AS400

["Dave Wall" <dawall@xxxxxxxxxx>]

Joe is correct, the difference is in the level of the Toolbox.
   Toolbox mod 0 and mod 1 -- if the parameter list is null the class
   creates a empty array and keeps going.  This is what you see on the
   client.
   Toolbox mod 2 and greater -- if the parameter list is null an exception
   is thrown.  This is what you see on the AS/400.

   You must be runing mod 0 or 1 on the client and mod 2 or later on the
   AS/400.  This is not a difference between JVMs, it is a difference in
   the level of the toolbox.

I think the mod 2 behavior is correct.  A parameter list is a required part
of calling a program.  Mod 0/1 assumes if the program passes null it really
means an empty array (no parameters).  Assuming is a dangerous thing, that
is why I think it is better to throw then exception and make the program
pass an empty array if there are no parameters.  This behavior is also more
consistent with the rest of the Toolbox which throws exceptions if key
parameters are null.  I hate changing behavior from one release to the
next, but in this case I think it is a good change.

David Wall
AS/400 Toolbox for Java


"Bruce Jin" <brucej@MRC-PRODUCTIVITY.COM>@midrange.com on 01/17/2001
03:36:15 PM

Please respond to JAVA400-L@midrange.com

Sent by:  owner-java400-l@midrange.com


To:   <JAVA400-L@midrange.com>
cc:
Subject:  Call RPG from Java using ToolBox - run on PC and fail on AS400



 Hello:

I wrote a simple java program to call a simple RPG program. The RPG program
is called TEST1 and it has no *ENTRY PLIST in it.  The code is listed
below.
The java class runs OK on PC (it prompts system, name user, password). The
RPG is called correctly. The output on the VAJ console is like this:

AS400 obj created...
pgm.run() = true
Call completed.


When I copied this class to AS400 and run it in Qshell, the class ran but
the call failed and I get the following output:

> java CallRPG2
   AS400 obj created...
   error=java.lang.NullPointerException: parameterList
   Call completed.
   $

Any ideas?
TIA. Bruce


import com.ibm.as400.access.*;

class CallRPG2 {

    public static void main(java.lang.String[] args) {

   boolean pgmrun;

   AS400 as400 = new AS400();
   System.out.println("AS400 obj created..." );

   ProgramCall pgm = new ProgramCall(as400);
   try{
     pgm.setProgram(QSYSObjectPathName.toPath("BRUCELIB", "TEST1",
"PGM"),null);
     pgmrun = pgm.run();
     System.out.println("pgm.run() = " + pgmrun);
     if (pgmrun != true)  {
      AS400Message[] msgList = pgm.getMessageList();
        for (int i=0; i<msgList.length; i++)
         System.out.println(msgList[i].getText());
   }

 } catch (Exception e) {
  System.out.println("error=" + e);
 }

 System.out.println("Call completed." );
 as400.disconnectService(AS400.COMMAND);
 System.exit(0);
  }

}


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