Re: Beginning modules, procedures, and service programs. -- MIDRANGE-L

Booth, could I recommend going www.think400.dk/downloads.htm and look for
my trigger mediator.

In that code bundle you will find a program tg0001.

This is a screen maintenance program that uses modules, services programs
and procedures to maintain a database table.

The service programs provide services for message handling, user spaces for
storage, temp names and standard error handlers.

The screen program is written using modules, one module per screen or CL
functions. Everything is bound together to form one program.

Please read through the readme. It gives some discussion of the design
discussions on how I use ILE.

This program is, also, written using 100% SQL.

If you don't want to download I can send the code. I have a newer version
in 100% free if you are interested.

If you want discuss or have questions send me an email or you could give me
a call.

On Sun, Jan 20, 2019, 1:15 PM Booth Martin <booth@xxxxxxxxxxxx wrote:

I finally decided to move towards the 21st Century. The whole idea of
prototypes, modules, service programs, and ILE concepts has been a
curiosity to me and avoided by me. But no more. I have been reading
articles, looking at examples, and working with service programs. It
still bewilders me

May I say back what I think I have learned, with the idea that I
probably got much of it wrong? I am barely past Hello World, and much
of what I read is targeted to a level somewhere above that. I need to
get my basics right. (I appreciate the patience and the talent here o
Midrange.com)'

Typically I have made a series of small programs to do the various
activities needed for an application. There would be a program to
create the file(s) needed for the application, the program to edit those
files, program(s) to communicate the data to & from users, ancillary
programs for F1-Help, F4-Prompt, etc., and the display files to go with
all of that.

If I understand correctly, the programs and their display files would
now become modules? A service program would be written to combine
those new modules? There would be another service program for the
wider-scope activities, like default values, message files, and
communications applications.

At that point every thing starts to fall apart in my head. So let me
offer a simple situation and ask what pieces should I create for that
situation:

NameFile, with name, street, city, state, zip, phone, and email. I need
to create the file, edit the file (including a default for message file
for language-to-use, dropdown (F4) on state, and an F1 key for
system-wide Help defaulting to NameFile help). I also want to provide
F4 screens for name, city, & state so other applications can plug in
dropdowns for valid name, city, & Sates for their own applications
needing name & address info.

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