Re: starting JVM is slow

[Dieter Bender <dieter.bender@xxxxxxxxxxxx>]

Hi Aaron,

I didn't say that calling RPG from java or vice versa is impossible, or slow, 
but whatever it would be, it would not be part of best practices. All papers 
talking about best practices, good design and things to avoid mention that's 
even no good idea mixing up java and C and JNI is designed for C. But JNI was 
designed for implementing the JVM and not to write applications using JNI. 
And JNI was designed for a multithreaded language like C and not for RPG.

Dieter Bender 

On Montag, 12. Januar 2004 20:06, Bartell, Aaron L. (TC) wrote:
> Just curious, what are your reasons for not calling RPG from Java?  I have
> a Servlet in production calling an RPG program with PCML as the
> intermediary, and it is very very fast.
>
> I agree that calling Java from RPG is pretty much useless unless it is a
> batch process or if you have a huge machine.  People will tell you to use a
> data queue or something similar, but that means you most likely need to
> write your Java interface so it can run off of a completely validated data
> queue record (meaning you don't collaborate with all the different methods
> in a Java class).
>
>
>
> Aaron Bartell
>
> -----Original Message-----
> From: java400-l-bounces+albartell=taylorcorp.com@xxxxxxxxxxxx
> [mailto:java400-l-bounces+albartell=taylorcorp.com@xxxxxxxxxxxx]On
> Behalf Of Dieter Bender
> Sent: Monday, January 12, 2004 11:08 AM
> To: Java Programming on and around the iSeries / AS400
> Subject: Re: starting JVM is slow
>
>
> Hi,
>
> IMHO best practice is: not to call java from RPG and vice versa.
>
> Dieter Bender
>
> On Montag, 12. Januar 2004 17:35, Ashish Kulkarni wrote:
> > Hi
> > I am calling Java program from RPG, and for the first
> > time it is very slow, as it has to start the JVM etc,
> > is there a way to imporve performance , what are the
> > best practice to call java from RPG,
> >
> > Ashish
> >
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-- 
mfG

Dieter Bender


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