AW: usropn files and service programs

["Knezevic.Mihael" <Mihael.Knezevic@xxxxxxxxxxx>]

a great way to do the cleanup. 

thanx.

-----Ursprüngliche Nachricht-----
Von: rpg400-l-bounces@xxxxxxxxxxxx [mailto:rpg400-l-bounces@xxxxxxxxxxxx] Im 
Auftrag von Wilt, Charles
Gesendet: Dienstag, 18. Juli 2006 14:40
An: RPG programming on the AS400 / iSeries
Betreff: RE: usropn files and service programs

Mihael,

That's one way of doing it, my I wouldn't recommend it.

Instead consider having an Init() and Cleanup() procedure in the service
program.

Init() would be called as the first step by every other procedure
(except Cleanup()) and take care of opening the files and any other
initialization that may need to be done.  Init() would also register
Cleanup() as an activation group exit procedure.  This means when the
activation group is ended normally, the Cleanup() routine would be
called.  Cleanup() would take care of closing the files and any other
cleanup that may be needed.

Scott Klement provides an excellent example of this technique here:
http://archive.midrange.com/rpg400-l/200406/msg00310.html

HTH,

Charles Wilt
--
iSeries Systems Administrator / Developer
Mitsubishi Electric Automotive America
ph: 513-573-4343
fax: 513-398-1121
  

> -----Original Message-----
> From: rpg400-l-bounces@xxxxxxxxxxxx 
> [mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of Knezevic.Mihael
> Sent: Tuesday, July 18, 2006 3:07 AM
> To: RPG programming on the AS400 / iSeries
> Subject: usropn files and service programs
>
> hi,
>
> i got a procedure in a service program which might be called once in a
> session f. e. in a maintenance program or  ten million times 
> in a batch
> program.
>
> afaik the default advice of ibm is that files in a service program
> should be defined usropn. but if i open and close the files on every
> procedure call the batch program is really slow.
>
> my solution would be to make at least three procedures in the service
> program:
> openFiles()
> action()
> closeFiles()
>
> my batch program would look like this:
>
> openfiles();
>
> dow (xxx);
>    ...
>    action();
>    ...
> enddo;
>
> closeFiles();
>
> afaik if the service program is compiled with actgrp(*caller) and the
> calling program is running in its own activation group the program
> should run as expected.
>
> is there any error in my way of thinking and are there any other
> (better) solutions to this? i think this is quite a common problem and
> probably everyone has faced this problem and found a solution. so i
> would like to here your solutions.
>
> thanx in advance
>
> mk
> -- 
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