RE: starting JVM is slow

I will take fault then, but you had better qualify your statements when you
make comments like yours.  They can catapult in to huge discussions when it
all could have been stopped at the beginning by somebody clarifying their
broad statements.

Something more appropriate if you are sticking with your statement of "Best
Practice" would be to say that Java holds no place on the iSeries except
under an App Server like Tomcat or WAS.

Just my opinion though,
Aaron Bartell

-----Original Message-----
From: java400-l-bounces@xxxxxxxxxxxx
[mailto:java400-l-bounces@xxxxxxxxxxxx]On Behalf Of Dieter Bender
Sent: Monday, January 12, 2004 2:36 PM
To: Java Programming on and around the iSeries / AS400
Subject: Re: starting JVM is slow


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


DV-Beratung Dieter Bender
Wetzlarerstr. 25
35435 Wettenberg
Tel. +49 641 9805855
Fax +49 641 9805856
www.bender-dv.de
eMail dieter.bender@xxxxxxxxxxxx

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