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Nice to see a shift to the relevance of application architecture. Why do
people view a GUI as an add-on to or extension of the 5250 paradigm, rather
than viewing "user experience" as fundamental to end-user productivity and
enjoyment? And view it as a crucial part of application design?

For quite a few IBM i applications, the user interface is the least of
their concerns, even though it is the thing that end-users view as
antiquated. The facade belies the problems that are inherent in the
database and application design.

Developing the best applications, the kind that ensure the future of the
IBM i platform, begin with something of a design-dance between the
following elements:

1. Database.
2. User Interface.
3. Application architecture.



On Thu, Dec 14, 2017 at 1:38 PM, Rob Berendt <rob@xxxxxxxxx> wrote:

I think one of the big problems is that programmers are really big on
putting all the controls into their 5250 programs.

One of the biggest examples is many people loathe using database
constraints such as Referential Integrity, check, and otherwise, or
trigger validation. Their concern (with some validity) is that they can
do the check on the 5250 and better guide the user through entering the
correct data.

I'd argue for both. Use the constraints and the triggers. Then, if the
UI developer wants to trap for those, adopt the mentality used by the
people mentioned above, or both, they can do so.

With the constraints and triggers you can ensure that the UI developer
doesn't corrupt your data. Or at least mitigate it to some degree.


Rob Berendt
--
IBM Certified System Administrator - IBM i 6.1
Group Dekko
Dept 1600
Mail to: 2505 Dekko Drive
Garrett, IN 46738
Ship to: Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com

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