Re: MVC in RPG?

[Mike <koldark@xxxxxxxxx>]

I think I am going to try this out on my next small project. I will just be
writing a display app to allow green-screen access to some data that a web
application will working with. Could be interesting. Thanks Joel, I forgot
about this.

On 9/26/07, Joel Cochran <joelcochran@xxxxxxxxx> wrote:
> Yes, I'm still here in *lurk* mode.
>
> The File Encapsulation experiment still lives at http://www.rpgbeans.com -
> at the time I was really trying to push the boundaries of ILE design,
> highly
> influenced by (as Aaron suggests) what I was learning in OO
> languages.  And
> I did write a couple of articles about it.  The justification for it is
> the
> same in RPG as it is in Java or other OO languages: by moving the IO to a
> service program, you have control over how the data is manipulated.  In
> other words, you are protecting your database from misuse.  Triggers could
> do the same thing, but they give me the willies.  The idea was to have a
> single SRVPGM resource that would manage access to a particular file.  It
> could also provide ready-made procedures, such as string formatting,
> calculations, etc.  You can use this approach to access your old cryptic
> field names with longer more meaningful names.
>
> The truth is that while the concept is sound, it takes an enormous amount
> of
> discipline in order to secure the desired results.  The ease of database
> access is sometimes too tempting (I'll just update the file directly this
> ONE time...).  Also, working with Collections of records would need to be
> added: this would best be handled with User Spaces but could also be done
> with MODS.
>
> Anyway, the code generation tools are still out there if anyone is
> interested.  It is free and open source, use it as desired but also at
> your
> own risk.  I am not currently in a position to maintain or upgrade the
> code.
>
> --
> Joel Cochran
> http://www.rpgnext.com
> http://www.rpgbeans.com
> http://www.developingfor.net
> --
> This is the RPG programming on the AS400 / iSeries (RPG400-L) mailing list
> To post a message email: RPG400-L@xxxxxxxxxxxx
> To subscribe, unsubscribe, or change list options,
> visit: http://lists.midrange.com/mailman/listinfo/rpg400-l
> or email: RPG400-L-request@xxxxxxxxxxxx
> Before posting, please take a moment to review the archives
> at http://archive.midrange.com/rpg400-l.