Re: GreenScreen to Browser -- RPG400-L

I've worked with a couple clients to set up web apps where
we did just this.

I came in as the web developer.  I would create the
interface using eRPG SDK or CGIDEV2 (or both).  When I need
to do something, like look up a customer number, add an
item to an order, etc, I would talk to their developer and
have them write either a callable program or an ILE
procedure that I would call to do the work.

We set it up so that the procedure or program would also
return error codes so that my app didn't care what they
were, it just new if there was an error to lookup the text
and display it an not continue.

When we got done, they always ask "Hey, can we use these
procedures/programs with our green screens?"

Then I say "Aha!  Very good!  Yes...  Keep the business
logic seperate and you'll save tons of time..."

So, in essencse, not only did I help them with the web
front end, but I "tricked" them into seperating business
and presenetation layers...  Needless to say they were very
happy!  

This does end up with two "apps" (one for web, one for
green screen), but they are display layer only.  All the
business logic is seperated.

Brad
www.bvstools.com

On Fri, 27 Aug 2004 09:27:37 -0400
 "Chris Wolcott" <CWolcott@xxxxxxxxxxxxxxxxxxxxxx> wrote:
> At a prior employer the plan (never realized) was to
> split the backend off from the presentation layer.  Then
> Green-screen programs could call the backend logic and
> browser programs could call the same backend logic.  Are
> your applications in such a condition that this could be
> accomplished?  Or even make the backend logic be exported
> sub-procedures that could be called from an external
> browser program while the green-screen logic remains more
> or less as-is? 
> 
> =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
> 
> date: Thu, 26 Aug 2004 17:01:14 -0700 (PDT)
> from: Eduard Sluis <eduard@xxxxxxxxxxxxxxxxxxxxxxx>
> subject: Re: GreenScreen to Browser (was ServicePrograms
> VS normal
>       Programs).
> 
> 
> Management here (me) want to change to a more modern user
> interface.
> Management here (me) knows that we can do it with an RPG
> backend (Amongst others we make bankingtransactions
> websites).
> Our flagship products are however 'still' GreenScreen.
> They are large, fairly modern and very flexible
> applications.
> We would like to give them a graphical interface.
> We can do it with products like NewLook (very Ok
> screenscraper with lots of functionality).
> But we would better like to make them browserbased.
> We can not rewrite them.
> We can not 'Yet' allow to change them in such a way they
> can not run anymore on greenscreen.
> We can not allow to end up with two versions.
> What are the real options/tools available to do this??
> Mind.. No resources, No time.
> Ok... a little time and some resources.
> 
> Kind regards,
> Eduard Sluis.
> 
> =====
> Implement-It,
> Pos Cabai OfficePark unit 2,
> Willemstad, Curaçao,
> Netherlands Antilles.
> 
> Cell: 5999 5618980 Tel: 5999 7372031 Fax 5999 7372048 
> 
> 
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Bradley V. Stone
BVS.Tools
www.bvstools.com