RE: A different kind of persistence?

Dane,

What you describe is indeed one possible scenario.  For this scenario, we
must assume that the module activates to a named activation group, and that
each subsequent access to the procedures within this module are to this same
named activation group.  

One of the basic premise of ILE is that a module, once started in a
particular activation group within the job, persists for the life of the
job, or until its activation group is reclaimed.  This means that the
activated module normally get initialized only once, and when a module
activates, all of it's global and static storage is initialized, which
includes all database record and field storage.  


Eric DeLong
Sally Beauty Company
MIS-Project Manager (BSG)
940-898-7863 or ext. 1863



-----Original Message-----
From: Dane Cox [mailto:DCox@xxxxxxxxxxxxx]
Sent: Monday, January 10, 2005 8:37 AM
To: RPG programming on the AS400 / iSeries
Subject: A different kind of persistence?


The last few weeks I have been reading the threads on persistence and
static variables and have actually come across a similar but slightly
different 'issue' that I thought I'd try and get some insight on.
 
I have an RPGLE program that calls a procedure contained in a module.
The procedure chains to a file and makes a determination based on the
contents of the record being chained to.  The calling program (the one
that calls the RPGLE program just mentioned) uses a job running in batch
to handle its calls.  Therefore, multiple calls are made to the RPGLE
program (and consequently the module) during the life of the job.
 
The issue is this.  If a chain to the file in the module is successful,
all of the fields from the data file are filled with the appropriate
data.  The module 'returns' to the RPGLE program which ends by setting
LR on.  Now, on any subsequent call to the module (within the same job)
the fields from the data file retain there previous values.  Of course,
once the job is restarted, the variables are re-initialized, and there
is no problem.
 
So, fields from files declared and chained to in modules retain their
data for the life of the job?  Is this normal behavior or am I just
missing something?
 
Regards,
Dane
 
 



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