RE: SRVPGM: USROPN file or not -- RPG400-L

The point is that they don't get opened until needed.  Without the USROPN,
the first program that uses a procedure from the service program will incur
a long lag time while the system is opening up all those files which it may
not even need.

> -----Original Message-----
> From: marcin.drozdowski@big.pl [SMTP:marcin.drozdowski@big.pl]
> Sent: Thursday, March 07, 2002 4:37 PM
> To:   rpg400-l@midrange.com
> Subject:      RE: SRVPGM: USROPN file or not
>
> Yes, but "IF NOT %OPEN(Filename)" will work the same way, as without
> USROPN:
> files remain opened until explicitly closed.
> Your method is better only in case SRVPRG contains procedures,
> which are not used frequently.
>
> Marcin Drozdowski
>
> -----Original Message-----
> From: Smith, Nelson [mailto:NSmith@lincare.com]
> Sent: Thursday, March 07, 2002 10:12 PM
> To: 'rpg400-l@midrange.com'
> Subject: RE: SRVPGM: USROPN file or not
>
>
> If I understand correctly, if a program references a procedure in a
> service
> program, on startup of the programs the references are resolved and this
> causes the service program to be also be started up.  If the service
> program
> has 20 files in it, without USROPN, all 20 files will get opened, even
> though the procedure your program was using only referenced one (or even
> none) of the files.
>
> Therefore, I always use USROPN on the files and in each procedure that
> uses
> a file, I put:
>
> IF NOT %OPEN(Filename)
> OPEN Filename
> ENDIF
>
> and then ignore the error messages you refer to below.  This way only the
> files actually being used get opened WHEN they are used and then they stay
> open for subsequent use as long as the activation group is alive.  I've
> had
> no problems with this so far.
>
> > -----Original Message-----
> > From:       marcin.drozdowski@big.pl [SMTP:marcin.drozdowski@big.pl]
> > Sent:       Thursday, March 07, 2002 2:40 PM
> > To: rpg400-l@midrange.com
> > Subject:    SRVPGM: USROPN file or not
> >
> > Procedure in my SRVPGM is called frequently, both from batch (server)
> > and interactive jobs. RPGLE programs are running in named activation
> > group.
> > IMHO it's good idea _not_ to declare files in SRVPGM with USROPN, but
> > compiler says: "Files should be closed explicitly when NOMAIN is
> > specified on the Control specification".
> > The message has severity 10 and SRVPGM is created.
> > Will it have any bad influences?
> >
> > Thanks for advice.
> > Marcin Drozdowski
> >
> >
> _______________________________________________
> This is the RPG programming on the AS400 / iSeries (RPG400-L) mailing list
> To post a message email: RPG400-L@midrange.com
> To subscribe, unsubscribe, or change list options,
> visit: http://lists.midrange.com/cgi-bin/listinfo/rpg400-l
> or email: RPG400-L-request@midrange.com
> Before posting, please take a moment to review the archives
> at http://archive.midrange.com/rpg400-l.


************************************************************************************************************************************************************************************************************
This message originates from Lincare Holdings Inc. It contains information 
which maybe confidential or privileged and is intended only for the individual 
or entity named above.
It is prohibited for anyone else to disclose, copy, distribute or use the 
contents of this message.
All personal messages express views solely of the sender, which are not to be 
attributed to Lincare Holdings Inc., and may not be copied or distributed 
without this disclaimer.
If you received this message in error, please notify us immediately at 
MailAdmin@lincare.com or (800) 284-2006.
************************************************************************************************************************************************************************************************************