RE: Creating a service program

[rob@xxxxxxxxx]

In case you don't like the generic 'do not do it that way' message,
I hope why I can explain why not to use *ALL.  I started out that way.
But got slammed against the wall by 'Program Signature Violations'.
For example you have PGMA which uses service program SRV1.  You want
to use SRV1 in a new program PGMB.  At the same time you add a new
subprocedure to service program SRV1.  You recompile SRV1 and PGMB.
Works great.  Two weeks later someone goes to run PGMA and it will
fail with a Program Signature Violation.  Program signatures keep
track of exports.  Exports are the subprocedure names, and to a lesser
extent, exported variables.  A close comparison to Program Signature
Violations are Record Level Checks.  If you use Binder language, and
use multiple signatures in your binder language, then PGMA and PGMB
will both work, without having to recompile PGMA.  You can do a DSPPGM
on PGMA and enter several times until you see the service programs and
look at the signature.  Then you can DSPPGM on PGMB, enter several
times and see the service programs and their signatures.  Then you can
do a DSPSRVPGM on SRV1 and see which signatures are supported.  Read
the RPG redbook for more info.



                                                                                
                                       
                    Anton Gombkötö                                              
                                       
                    <Gombkoetoe@ASsof        To:     RPG400-L@midrange.com      
                                       
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                    08/22/00 01:21 PM                                           
                                       
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In addition to Brad's answer:

The value *ALL is allowed for paramter EXPORT of CRTSRVPGM.

That means that you want all procedures in your serviceprogram to be
accessable from other programs.

So you need not maintain a binder language source.

There are some disadvantages, too, but for the beginning it might be
simpler. In fact, we're using the *ALL value for creation of our service
programs, too, and have not encountered bigger problems yet. But it depends
on the structure, number of planned versions and, last, but not least, the
size of the application.

0.02 Euro


Mit freundlichen Grüssen / Best regards

Anton Gombkötö
mailto:Gombkoetoe@ASsoft.com

AS Software GmbH
http://www.assoft.com
Jedleseer Strasse 3
A-1210 Wien
Tel: +43 1 278 15 01-0
Fax:+43 1 278 15 01-22

Ab September sind wir die
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