Date: Sat, 10 Mar 2001 06:36:02 -0500
Reply-To: don.henderson@US.PWCGLOBAL.COM
Sender: "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From: don.henderson@US.PWCGLOBAL.COM
Subject: Re: How AF uses lists to define objects
Content-type: text/plain; charset=us-ascii
Andreas,
I suspect that David is trying to clean up lists created directly by SCL
code written by others (which is why Don Stanley's earlier suggestion would
likely not work for David).
David: correct me if my assumption is wrong here. But I suspect you are
trying to add a facility to your SSP product/facility? And what you want to
do is make sure that a program that a customer/user writes does not leave
things lying around in the server environment that can pop up later and
cause problems? This was a major request from SAS users of SAS/IntrNet and
that is why I suspect you are trying to do something similar.
In Version 8 of SAS/IntrNet, SAS has provided that facility by implementing
the Application Server as a PROC which gives them the facility to invoke
each request in its own "Executive." An Executive is a separate
sub-environment within SAS that is insulated from all others. That is how
the V8 App Server guarantees no polution of macro vars, etc. It is also why
things like the FMTSEARCH option have be specified within a program
specified in a REQUEST INIT statement. See the following which makes
mention of this concept of executives:
http://www.sas.com/rnd/web/intrnet/dispatch/how.html#works
I am not sure if SAS has surfaced the facility to SCL or to user programs to create an Executive, so that may not be an option for you.
The only suggestion I could make is that if my speculation is correct,
perhaps you need to create a master list of all the lists before invoking
the user program, and then after the user's program is done, delete all the
lists not in this "master" list. However, there might also be other
internal lists that it might be dangerous for you to delete this way.
-don henderson
Andreas Grueninger <grueninger@IBGRUENINGER.DE>@LISTSERV.UGA.EDU> on
03/10/2001 04:46:10 AM
Please respond to grueninger@ibgrueninger.de
Sent by: "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
To: SAS-L@LISTSERV.UGA.EDU
cc:
Subject: Re: How AF uses lists to define objects
I have the strong feeling that you try to do something really
unnecessary.
Lists created by SAS objects are deleted automatically when the object
is terminated. If you manipulate this lists you destroy the internal
structure.
I create all lists at the beginning of a program/method and I leave
all programs/methods at defined points and there is always a macro
which kills all lists I defined at the beginning of the
program/methods.
And nothing else is deleted by me.
dward@INTERNEXT-INC.COM (David L. Ward) wrote:
>If the lists are local (odd), I can delete them as well. But strange
things
>start happening with any code afterwards. When I try to instantiate any
>objects I get those nasty severe task errors, etc. The lists I am
deleting
>look like what you get when you execute a putlist on an object, sublists
of
>sublists of sublists, with _INSTANCE_ATTRS_, _ATTRS_, etc. I would assume
* --------------------------------- +
! Ingenieurbuero Grueninger !
! Andreas Grueninger !
! Uhlbergstr. 15 !
! 72631 Aichtal (Germany) !
! email: grueninger@ibgrueninger.de !
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