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Actually I don't have a need now to change the interface but I am trying to
"sell" my shop on using service programs and this issue came up. We use
hawkeye now to tell where a file or program is used but there seems to be
no way to find out if a program uses a particular procedure from a service
program. I agree that changes to the interface should be made in such a way
to minimize the impact on the system but if the change must be used by
current users of the procedure then backwards compatibility would not be
wise. From what I can tell so far, searching the source appears to be the
most reliable method. Any information you have or can point me towards to
assist my selling efforts would be greatly appreciated.

Thanks
Chris Bougher



                                                                                
                                                        
                      Scott Klement                                             
                                                        
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Procedure Is Used                                           
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                      03/31/2004 04:23                                          
                                                        
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                      Please respond to                                         
                                                        
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Hi Chris,

> Is there a way to tell what programs use a procedure in a service
program?

Personally, I'm a proponent of the "new way" of handling things, which is
to make sure that service programs are ALWAYS backward compatible.  In
that situation, you never have to search out and find where each proc is
used.  If you're interested in this approach, give me a bit more detail on
what's changing in your interface, and I'll suggest how you might do it in
a backward-compatible manner.

However, if you do want to do it the "old-fashioned" way and
change/recompile every program that uses the service program, the
FNDSTRPDM utility can be used to search the source code that's stored in
source PFs, and QShell's grep utility can be used to search source files
stored in the IFS.  (Though, grep also works on source PFs, I prefer
FNDSTRPDM)


> We have a service program with multiple procedures and would like to be
> able to get a list of programs that use one of the procedures to change
the
> interface without having to look through all the programs that reference
> the service program.

This isn't any different from changing the size of fields in an externally
defined file.  You need to search out where these procedures are called,
modify the code to use the new interface, and recompile the programs.

If you're going to break backward compatibility, I recommend making sure
that the service program's signature changes as well, so that if you miss
any programs they won't run (just like a record format level check on a
file)

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