RE: Externalizing I/O was RPG read loops

[rob@xxxxxxxxx]

I don't write my triggers assuming the update is coming from the 5250 
session.  I simply throw an exception message.  Then I let the UI program 
use the %status, psds, etc to determine what to do.  I think, even if you 
were going to go the external i/o route, assuming that your i/o routines 
are only called by a 5250 program would be a tad shortsighted.

Hear you on the recursion.  Don't often have a need for that particular 
example though.

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 11:53 AM
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RE: Externalizing I/O was RPG read loops






Both.  We're a small shop with only six developers.  I admit to being the
one pushing this architecture, though.

As I understand it, another benefit is these access programs could
eventually be tweaked to support browser based applications and "green
screen" applications simultaneously.  Tough to do that with triggers. 

Another problem with triggers is recursion.  If I need to update a related
record in the same file, I'd need to have my trigger program in a *NEW
activation group, which creates a lot of overhead.  Using access 
procedures
in service programs eliminates that problem.

As for stopping errant developers, a trigger could be used for that, 
though
we don't here. 

Just my current opinion, which, of course, may change later. 

Donald R. Fisher, III
Project Manager
Roomstore Furniture Company
(804) 784-7600 extension 2124
DFisher@xxxxxxxxxxxxx

<clip>
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?
<clip>
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