• Subject: Re: Remote Java calls to RPG AS400 programs ?
  • From: Madhavan <seawolf00@xxxxxxxxx>
  • Date: Mon, 8 Jan 2001 08:32:13 -0800 (PST)

Pt 3 > In technical terms, it is called socket
connections through which you can do Program
calls/Command calls !

(To be more precise - if you care to impress your
folks all the more)

--- Tim Truax <truax@telerama.com> wrote:
> Hi All,
> I am a very popular person where I work. Please let
> me explain. My large company has merged with an even
> larger company, now this larger company has via a
> simplistic prototype program (RPG400) that I put
> together discovered how easy it is for them to write
> Java programs that call (remotely through the IP
> network) my tiny RPG400 AS400 programs that then
> interface with massive legacy programs that derive
> information from the workhorse AS400 systems and
> hand all kinds of nifty information back to their
> Java program callers. This larger company is quite
> impressed with how this works, and this type of
> processing is going to take off where I work. 
> I hope I explained the scenario well, as I have a
> few issues:
>   a.. When the remote Java programs initiate a call
> to the AS400, the jobs enter the AS400 as Prestart
> Jobs in the QUSRWRK subsystem named QRCSRVS under
> user QUSER. Why is it under QUSER when the Java
> programmer actually uses a different userid to gain
> access to the AS400 via their Java program? I
> actually used the RTVJOBA from the program I wrote
> in hopes of identifying the actual caller by their
> userid, but was perplexed as to only retireve the
> QUSER userid. 
>   b.. If these Java call jobs enter the AS400 under
> QUSER and not the userid I assigned to the caller
> then I lose control of actually limiting a specific
> users access, any suggestions? 
>   c.. The Java programmer on the remote side uses a
> software called (Weblogic App Server) and this
> permits him/her to start one or several openings or
> portals to the AS400 system which appear as active
> prestart jobs on the AS400 system named as above,
> and then the Java program fires these calls to my
> RPG400 interface programs through these openings or
> portals, so to speak. So am I right in my
> description when I say the Weblogic software allows
> the Java programmer the ability to create one or
> multiple openings/portals remotely to the AS400,
> these openings/portals appear as active jobs and
> then repeatedly call my program through these
> openings/portals.
> What I want to find out from this distinguished
> group is this:
>   1.. Is my terminology in the third bullet point
> above correct, or does my description sound goofy? 
>   2.. Does anyone have any words of caution or
> advice or things to be aware of when doing the
> process I describe above, as this is going to TAKE
> OFF big time where I'm at and I am the alleged
> 'professional' that everyone wants to talk to about
> this and I still feel like a relative novice?
> Please give any advice, I will appreciate all
> responses.
> Thanks so much!
> Tim Truax and Caleb 7 yrs. but divorced now.

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