Re: AS/400 and Java

David,

I would agree with most of your statement. Open Source Frameworks like
Struts are a good starting point to write java applications and to
avoid some of the beginner problems. If you get into performance
problems (not so unusual with web applications), a well modularized
design will help you in most cases; just find the responsable
components and redesign this components optimized for speed.
The discussion in the as400 java community is too much focused on
CRTJVAPGM, the drivers and special features of as400 or WebsFear, but
maybe I've had a little bit success to change this with this thread.

Dieter Bender

David Morris schrieb:
> Dieter,
>
> I struggled with WebSphere also, and came to the
> conclusion that Tomcat
>
> was a better fit for most of the projects I work on. With
> your
> experience,
> you probably have some insights that could help AS/400
> Java developers.
> I
> want AS/400 Java programmers to be successful at
> deploying Java but
> statements like "don't use CRTJVAPGM on boxes > V4R5" and
> "don't use
> the native driver, its buggy" don't seem constructive.
>
> My contribution to the question "how to write java
> applications, well
> modularized, flexible against changing requirements,
> stable, failure
> tolerant and .... fast enough on as400." is to turn
> toward open source
>
> projects like Struts and Tomcat. These were not written
> by RPG
> programmers
> and work just fine on the AS/400 as well as other
> platforms. Most RPG
> programmers that I have help learn and use Struts have
> had little
> trouble
> understanding the Struts framework and recognize its
> value, just like
> they
> recognized the value of external display files.
>
> David Morris
>
> >>> Dieter.Bender@t-online.de 11/05/02 12:26PM >>>
> David,
>
> I'm reading this Mailing list for a long time and I see
> some java
> projects in
> the 400er area in germany and sometimes I've the idea
> that I'm looking
> at rpg
> programs written in java and the outer world of java is
> hidden to the
> 400er
> community and this is a negative fact for the as400. The
> main topic is:
> how
> to write java applications, well modularized, flexible
> against
> changing
> requirements, stable, failure tolerant and .... fast
> enough on as400.
> and so
> I'm throwing in my few cents (we have this in germany now
> too) to bring
> the
> as400 java community to the mainstream of application
> development.
> If CRTJVAPGM speeds up your application and you need it,
> use it. I've
> seen
> constellations, it didn't help anything and took 24 h.
> The as400 and it never crashs, I've seen boxes running
> WebsFear: WF
> took 95%
> of the CPU, just doing nothing, it was impossible to stop
> WF, the SBS
> could
> not be ended, even an ENDJOBABN didn't help, only
> PWRDWNSYS stopped
> this
> nonsense and luckily we did not run WF 3.5.1 or 3.5.2
> (some of us know
> why).
>
> Dieter
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