• Subject: RE: Remote Java calls to RPG AS400 programs ?
  • From: Kurt Goolsbee <K.goolsbee@xxxxxxxxxxxxx>
  • Date: Mon, 8 Jan 2001 14:39:36 -0600

Tim,

The portals you are talking about are separate TCP connection from the
Weblogic servers to the AS/400.  Each of these connections are handled on
the AS/400 by an different QRCSRVS job.  Since they are prestarts they are
running under a lowly user profile.  When the PJ is activated it is swapped
run under the identity of the person at the other end.  The job still
belongs to QUSER.  Try the geteuid api to get the effective user of the job
and then use the getpwuid api to turn the uid into a user profile name.


        -----Original Message-----
        From:   Tim Truax [SMTP:truax@telerama.com]
        Sent:   Saturday, January 06, 2001 10:12 AM
        To:     ML - Midrange Email List
        Subject:        Remote Java calls to RPG AS400 programs ?

        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:

*       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. 
*       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? 
*       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' person 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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