RE: Java/RPG interface -- RPG400-L

I would beg to differ.
I feel that if you have a clear understanding of how to prototype java
classes (it's quite simple really; all in the manual) and creating a D-
spec to define a new data type for each class, then it's just a matter
of compiling with a /COPY directive to include the prototypes and data
types ( either directly or via a service program) thereby making the
java classes available as callable procedures just like any other
procedure.

V5R2 makes it all much simpler by starting the JVM automatically for you
and there's no need to end it anyway, if you set your classpath via the
SystemDefault.properties. You may (or may not) be surprised to find that
the JDK14 shipped with OS400 already contains most of the packages you
need anyway.

Peter

-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx
[mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of Christen, Duane J.
Sent: Thursday, 2 September 2004 8:11 a.m.
To: 'RPG programming on the AS400 / iSeries'
Subject: Java/RPG interface

We need to implement a RPG-ILE never ending process (NEP) that reads
data
from a file, determines what action that needs to happen based on the
file
and then call a java program (methods) that will invoke different soap
methods to accomplish the necessary action.

Our desire is to have the NEP be in RPG since that is the majority of
the
programmer base in the company.  The question is how difficult is it to
call
java programs (methods) from RPG.  Based on the information I am
receiving
it is not easy for RPG to call complex Java programs (methods) that have
many classes.
We are also getting feedback that the JVM does not stay "Active" and may
end
at any time. From some of the discussions on this list my understanding
that
from V5R2 on you can not intentionally end a JVM let alone have it end
arbitrarily.

Any information would be appreciated.

Thanks
Duane Christen


FYI: We are running on V5R2M0.



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