Re: avoid running ILE programs in the DAG...

Why not have a cleanup program for each service program so that if it ends
in error you won't have any junk laying around. What exactly were you
pointing to that you got a pointer crash? I write all my new code in
named AG's, and trust me, when I'm developing they crash and burn. But I
don't ever have trouble running the program again. Are you trying to trap
the error and continue? Or are you describing just rerunning the program?
I'm guessing you are missing a critical piece. You should no way no how
need to run your service programs in the DAG.

Can anyone else verify if commitment control will or won't work in named
AG's? I can't hardly believe that. I know most i shops don't use CC, but
this would seem like a huge oversight on IBM's part.


Thanks
Bryce Martin
Programmer/Analyst I
570-546-4777



Alan Campin <alan0307d@xxxxxxxxx>
Sent by: rpg400-l-bounces@xxxxxxxxxxxx
10/06/2010 12:35 PM
Please respond to
RPG programming on the IBM i / System i <rpg400-l@xxxxxxxxxxxx>


To
"RPG programming on the IBM i / System i" <rpg400-l@xxxxxxxxxxxx>
cc

Subject
Re: avoid running ILE programs in the DAG...






We had to put our service programs back into DAG because commitment
control
would not work unless the program was running DAG.

We also ran into big problems with errors in named activation groups.
Every
time that an error is thrown in a named activation group the system
destroys
the activation group and when you try to go back to it the program crashes
because the pointer is now pointing at a object that doesn't exist
anymore.

The only way we could seem to get around this was to run the service
program
and programs in the DAG so that it could not destroy the activation group.

Totally bizarre behavior on IBM's part. Errors occur all the time. Why
destroy the activation group but that what they do.

I don't like running everything in the DAG but pretty much have no choice.

On Wed, Oct 6, 2010 at 8:12 AM, Stefano Arrighini - Smea s.r.l. <
s.arrighini@xxxxxxx> wrote:

Hi to all

Some years ago all ours programs ran in the DAG.

In the past two years we "introduced" Activation Group in some

programs

(some in named AG, other in temporary ones).
We made this for various reason (avoid recursion, improve performance,
etc.).

Unfortunately (or better... by ignorance...) we made this operation
without having well understood Activation Groups.

Now I'm trying to do spring cleaning...

In all (or almost) technical articles and forum I read, I found the
advice
to avoid running ILE programs in the DAG.

So we modified our programs to run all of them in Named Activation

Group

(or Temporary) and not in the DAG.
None of our programs are compilated with DFTACTGRP(*YES)!!
So I simply replaced *CALLER with Named-one in the ACTGRP option of

ours

"starting program" (the first program in the call stack of ours job).

I found lots of advantages... but this operation introduced some

problem

with OVRDBF scoping.

To avoid this problem I changed the OVRDBF (and OVRPRTF and DLTOVR)

with

scoping problem.

A make an OVRPRTF and calls B
B calls C
C is in a different AG and isn't affected by OVRPRTF. But I want it.

OVRPRTF OVRSCOPE(*CALLLVL) was my solution..

Now my MAIN question is...
Compiling all my existing program in a proper Activation Group (not in
the
DAG), how many other problem can produce?

For example I found some difference in "free resources".
The RCLRSC LVL(*CALLER) used in the DAG can't be "replaced" with a
similar
command in a Named AG...
I have to close the Activation Group... Right?

Any help or observation would be greatly appreciated.
Thanks in advance

Stefano
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