RE: Passing Messages -- JAVA400-L

Something to take into consideration is the version of OS/400 you are
running. I don't recall what version this became available in. I know it
has worked since at least v5r1. I don't know before that.

Actually, the examples in the Programmer's Guide are _really_ simple. 

I found the following articles to be helpful when I was learning about
it:

http://www.midrangeserver.com/mpo/mpo013102-story02.html

http://www.midrangeserver.com/mpo/mpo041003-story01.html

Then you will want to check out that guide (this one is for v5r2). 

http://publib.boulder.ibm.com/iseries/v5r2/ic2924/books/sm22/c0925074.pd
f

That should give you an idea. If you don't know RPG it may prove to be
interesting, but the examples should help a lot. You can pull it off I
like 10-20 lines of RPG, give or take, depending on the number of
parameters you have.

Hope that helps!

Dan Feather
dfeather@xxxxxxxxxxxxx

-----Original Message-----
From: java400-l-bounces@xxxxxxxxxxxx
[mailto:java400-l-bounces@xxxxxxxxxxxx] On Behalf Of
SMore@xxxxxxxxxxxxxx
Sent: Thursday, April 22, 2004 3:23 PM
To: java400-l@xxxxxxxxxxxx
Subject: RE: Passing Messages

This sounds like the "right" way to do it.

I am a java/linux programmer, so anything about RPG sounds complex.

Would there be a "Hello World" example for RPG/JNI ?

Once I get that, I think I can better understand the "ILE RPG
Programmer's
Guide"


-Thanks
Steve More
Web Application Developer
Empire Corporate FCU


-----Original Message-----
From: Daniel Feather [mailto:DFeather@xxxxxxxxxxxxx]
Sent: Thursday, April 22, 2004 2:52 PM
To: Java Programming on and around the iSeries / AS400
Subject: RE: Passing Messages


You could use JNI and write a simple RPG wrapper program to call your
java program, and have the java method you call return a string, and
then return that string in one of the parameters of the RPG program.
Then have your CL call that RPG program and read that parameter for the
result. That's actually not as complex as it sounds. Information about
calling java methods from RPG can be found in the ILE RPG Programmer's
Guide.

Something to consider.

Dan Feather
Silhouette/PinPoint R&D Programmer
Jack Henry & Associates, Inc.
dfeather@xxxxxxxxxxxxx

-----Original Message-----
From: java400-l-bounces+dfeather=jackhenry.com@xxxxxxxxxxxx
[mailto:java400-l-bounces+dfeather=jackhenry.com@xxxxxxxxxxxx] On Behalf
Of SMore@xxxxxxxxxxxxxx
Sent: Thursday, April 22, 2004 1:28 PM
To: java400-l@xxxxxxxxxxxx
Subject: Passing Messages

What is a good way to pass a message from a java program to CL ?

You can pass parameters in when calling RUNJVA, but how can you get a
parameter out ?

Here is what I have tried to do:
        1. In CL create a data-area in qtemp
        2. Call RUNJVA, this java program would write to the newly
created
data-area in qtemp
        3. CL would read a message from this data-area
        4. When CL ends the data-area in qtemp dis-appears

        The problem here is that the java program in step 2 can not read
the
data-area created in step 1.

I guess I'll try and use a db2 table instead of a data-area if no-one
has a
better idea.

Thanks
-Steve More



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