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  1.  Home
  2. RPG400-L
  3. October 2006

Re: Global Variables in a Service Program

Hi,

I think it depends what you want to do.
I personally avoid importing and exporting variables, nevertheless I use service programs that hold information in either global datastructures or arrays. But I prefere more the "Java" like solution, i.e. I have a bunch of Getter and Setter procedures, that fill the global datastructures and receive data from these global datastructures. 

Instead of defining variables in my sources, I use procedure calls.
I find it more accurate, but this is my personal opinion.
For error messages I send escape messages and trap the message textes from the program status datastructure (position 91 - 170). 

Mit freunlichen Grüßen / Best regards

Birgitta Hauser
"Shoot for the moon, even if you miss, you'll land among the stars." (Les Brown) 
"If you think education is expensive, try ignorance." (Derek Bok)
----- Original Message ----- From: "Nathan Andelin" <nandelin@xxxxxxxxx> 
To: "RPG programming on the AS400 / iSeries" <rpg400-l@xxxxxxxxxxxx>
Sent: Friday, October 27, 2006 23:39
Subject: Re: Global Variables in a Service Program



What I do not see, is how I would access this common data in my programs
without having to define the variables in the program using the Import keyword. If I do that, then I do not have any advantage in a service program with the data 
in it.
Right. You'll need an import, but sometimes data needs to be shared across three (3) or more programs or service programs, but it may not be necessary to share procedures across the same programs or service programs. In that case, why not isolate just the data into a shared service program? 

Nathan.




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