Kelly Jones wrote:
We have a situation where we need to call a Java program, have it do
"it's thing", then pass a return code back to the calling program.  The
main point of the return code is to inform the calling program whether
everything went OK.  If the Java program bombs, we need to inform the
caller that something bad happened and stop.
Can someone provide an example how to do this?

If you could have your Java program throw an exception instead of using a return code, the CL or RPG program could use the JAVA command (RUNJVA is another name for this command), and monitor for the JVA0122 message that is issued if it ends with a thrown exception.

class jcombine
    static public void main(String args[])
       throws Exception
       if (args.length < 1
       ||  args[0].equals("crash"))
          throw new Exception ("no args, or arg=crash");

You could set the classpath using the CLASSPATH environment variable, instead of using the parameter on the RUNJVA command.

A CL program using RUNJVA:

   MONMSG JVA0122 EXEC(SNDPGMMSG 'failed, no args')

   RUNJVA jcombine PARM('crash') OUTPUT(*PRINT) CLASSPATH('x')
   MONMSG JVA0122 EXEC(SNDPGMMSG 'failed, arg="crash"')

   RUNJVA jcombine parm('hello') OUTPUT(*PRINT) CLASSPATH('x')
   SNDPGMMSG 'no error, arg="hello"'

My joblog after running this CL program:

   Java program completed with exit code 1
   failed, no args
   Java program completed with exit code 1
   failed, arg="crash"
   no error, arg="hello"

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