RE: Changing triggers

[John P Carr <jpcarr@xxxxxxxxxxxx>]

I would like to see how they accommodated the different buffer
layouts(Before/After image) based on the record length of each file evoking
the trigger.

John Carr
----------------------------------

One of the software vendors I work with has done this.

What they did was to build a generic trigger program, which they reference
on the ADDPFTRG command. The generic trigger when activiated writes it's
data to file.  A batch job waiting on the same file with an end of file
delay then refers to a table to determine which program(s) should be called
to re-signal the trigger.

Of course, the generic trigger program has to be well thought out, and
including extra program calls to re-signal the trigger does have a
performance penalty.  

AFAIK, these triggers are only *AFTER style triggers, just intended to let
another application or interface know that a record had been
added/changed/deleted.  

This setup was written in RPG III
Regards,
Rich
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