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This topic is talking about a new RPG book IBM is publishing, so the author's implementation is the point.



-----Original Message-----
From: Nathan Andelin [mailto:nandelin@xxxxxxxxx]
Sent: Tuesday, October 25, 2016 1:23 PM
To: RPG programming on the IBM i (AS/400 and iSeries) <rpg400-l@xxxxxxxxxxxx>
Subject: Re: RPG redbook

It's hard for me to answer for the "author", because I don't really like his implementation. I just agree with the premise of designing software which provides a "separation of concerns", as opposed to a "big ball of mud".

I suppose it solves the problem of having to buy tools to analyze and outline your software to be able to understand it. Instead, your software implements a set of patterns which are cohesive and well-known.

Someday you may flip a switch in a service program which points its procedures to a remote DB rather than the local DB without impacting applications.

If your DB I/O service programs implement a known interface, someday you may deploy a utility which automatically exposes all of them via REST web services APIs.


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