RE: Calling Java from RPG

["Bramley, Stu" <stu.bramley@xxxxxxxxxxxxx>]

Thanks Joe..

At the moment I'm looking more into what the capabilities of the RPG-Java
bridge and WAS are.. but I've documented this design pattern for future use
- I'm sure that I will need it! 

I would like to see the system to be able to recognise that a Java class has
been put under the control of a container and serve any request for that
class out of the container.. It can't be that hard if Microsoft managed it
with MTS/COM+ <g>

Stu


-----Original Message-----
From: Joe Pluta [mailto:joepluta@xxxxxxxxxxxxxxxxx] 
Sent: Tuesday 24 February 2004 16:21
To: 'RPG programming on the AS400 / iSeries'
Subject: RE: Calling Java from RPG


> From: Bramley, Stu
> 
> I'm sorry, that went right over my head (doesn't take much!) - are you
> saying that the alternative is to have batch server jobs with their
own
> JVM
> creating 'shared' instances of Java objects and then have client RPG
> programs queue processing requests in data queues that the server jobs
> read
> off and return results/pointers?

Exactly!  If you need persistence between calls, you'd have to create a
session object and then pass an identifier back and forth with each
call, but a server job is the only way I know of to force the use of a
specific JVM.

It would be nice to be able to "attach" to a JVM that was already
running anywhere in the system.  We've been asking for this forever, but
the folks at IBM insist it's too hard to do.

Joe

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