RE: java to rpg problem -- JAVA400-L

Thank you guy's.

I'm not at the office anymore so
1) I need to talk to the programmer who is working on this project
2) I cannot take the exact example buy hand (it was in one of the
iSeries mags)

It seems that we didn't understand (or misused) the example we would try
out.  It was an example to reuse *srvpgm's (used by native RPG
programs) in java.  It didn't mention anything about running on iSeries
only which isn't of much help... why rewriting already running native
apps in java when one could use them on iSeries only???

Patrick Goovaerts
pgoovaerts@pandora.be
TEL: 0032-3-6472715
GSM:0498610325



-----Oorspronkelijk bericht-----
Van: java400-l-admin@midrange.com [mailto:java400-l-admin@midrange.com]
Namens Mark Phippard
Verzonden: donderdag 5 december 2002 19:34
Aan: java400-l@midrange.com
Onderwerp: RE: java to rpg problem


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Patrick,

See the previous answer by Joe Sam Shirah.

That method tries to load a "shared object" native to that platform.
When the JVM is running on Windows, as with WDSC, it will attempt to
load a DLL.  On the iSeries it would attempt to load a *PGM or *SRVPGM.
However, even then the program would have to be written to the JNI
standard, which means C.  You could write JNI "wrappers" in C that in
turn call your RPG. But you could not test or run that code on any
platform but the iSeries.

If you already know how to use the ProgramCall class, why not just use
it?  You can hide the usage of that class in another class that hides
the complexity.

For example, we will write classes like Order with method likes
calculateSalesTax.  That method will do a ProgramCall to an RPG program,
but that fact is invisible to a user of our Order object.

Mark






"Patrick Goovaerts" <pgoovaerts@pandora.be>
Sent by: java400-l-admin@midrange.com
12/05/2002 01:13 PM
Please respond to java400-l


        To:     <java400-l@midrange.com>
        cc:
        Subject:        RE: java to rpg problem


Mark,

>> You have to export the procedures and bundle them in a *SRVPGM.  In
other words, they have to be bundled in such a way that a CL program >>
could use them via CALLPRC or another RPG program could use them via
CALLB or CALLP. This part is ok.

>> Once you have done that, you can then call them via the "distributed
program call" method you refer to (PCML and the Toolbox).  If you >> are
running the Java code on the iSeries, just put the Toolbox Native
Optimizations in the CLASSPATH and the call will run in the same >> job
as the Java code and not require you to supply a user name and password
on the AS400 connection class. As stated before, loading the class on
iSeries doesn't produce an error but when running inside WDSc (WebSphere
Development Studio for iSeries v4.03), the error is generated although
it doesn't show any errors in java/web perspectives which means that
compiling is ok. This is the code which fails: Static {
                 "System.loadLibrary("PROGRAMNAME");
}

This is the error displayed on console-panel inside WDSc:
java.lang.UnsatisfiedLinkError: no PROGRAMNAME (PROGRAMNAME.dll) in
java.library.path at
java.lang.ClassLoader.loadLibrary(ClassLoader.java:1380)
at java.lang.Runtime.loadLibrary0(Runtime.java:766)
at java.lang.System.loadLibrary(System.java:849)
at Agents.AgentsController.<clinit>(AgentsController.java:35)
Exception in thread "main"


Patrick Goovaerts
pgoovaerts@pandora.be
TEL: 0032-3-6472715
GSM:0498610325

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