Re: RE: Externalizing I/O was RPG read loops

<ducking quickly>

Of course you could always use the trigger to call the external program... ;-)

-----Original message-----
From: rob@xxxxxxxxx
Date: Wed,  2 Feb 2005 16:38:04 +0000
To: RPG programming on the AS400 / iSeries rpg400-l@xxxxxxxxxxxx
Subject: RE: Externalizing I/O was RPG read loops

> I get my enforcement of business rules with triggers and constraints. 
> Stops even the errant developer who updates a file directly with any 
> utilities.  Again, only one place to maintain the logic.  Don, are you the 
> developer of these functions, or only a user?
> 
> Rob Berendt
> -- 
> Group Dekko Services, LLC
> Dept 01.073
> PO Box 2000
> Dock 108
> 6928N 400E
> Kendallville, IN 46755
> http://www.dekko.com
> 
> 
> 
> 
> 
> "Fisher, Don" <Dfisher@xxxxxxxxxxxxxxxxx> 
> Sent by: rpg400-l-bounces@xxxxxxxxxxxx
> 02/02/2005 11:18 AM
> Please respond to
> RPG programming on the AS400 / iSeries <rpg400-l@xxxxxxxxxxxx>
> 
> 
> To
> "'RPG programming on the AS400 / iSeries'" <rpg400-l@xxxxxxxxxxxx>
> cc
> 
> Subject
> RE: Externalizing I/O was RPG read loops
> 
> 
> 
> 
> 
> 
> I used to think the same way.  It took me quite a while to understand the
> benefits of such functions. 
> 
> I've been experimenting with them here and have used them to make my file
> updates, writes, deletes, etc. exist in only one place.  The same logic to
> perform these functions is executed each time one of these operations is
> requested.  It gives me the ability to enforce business rules and have 
> only
> one place to maintain the logic.
> 
> The case for procedures that merely return the data is more difficult,
> except I've found these procedures integrate well with the update and 
> record
> creation procedures.
> 
> Donald R. Fisher, III
> Project Manager
> Roomstore Furniture Company
> (804) 784-7600 extension 2124
> DFisher@xxxxxxxxxxxxx
> 
> 
> <clip>
> I think you're the first person that I heard of, that wasn't the person in
> charge of writing the access programs, that actually liked this scenario. 
> Why an end developer would like to replace
> 
> chain(e) myfile;
> // now actually do some real work with the fields
> 
> with
> getFilename();
> MyWorkField1=GetField(field1);
> MyWorkField2=GetField(field2);
> ...
> // now actually do some real work with the fields
> 
> rather escapes me.
> <clip>
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Jonathan Mason
www.astradyne-uk.com