RE: Preferred method to access databases from Servlets

[cujo@xxxxxxxxxx]

There are others more qualified to give a full answer to this than myself,
but basically CRTJVAPGM creates a *PGM object out of Java code.  The
program object is 'hidden' and associated with the class files that it
represents.  The program gets called automatically when you execute your
java code in the standard way.  When I say hidden, all I really mean is
that the system takes care of maintaining the associations of the program
object and the java class files instead of the user (as with a C program
object for example).  You can use DSPJVAPGM to see these program objects.

This command creates a true native AS/400 program object which runs very
much like a C program would on the system.  The concept of a Java
interpreter reading a byte code stream a line at a time and figuring out
what to do goes out the window.


Regards,

Richard D. Dettinger
AS/400 Java Data Access Team

"TRUE! nervous, very, very dreadfully nervous I had been and am; but why
WILL you say that I am mad?
The disease had sharpened my senses, not destroyed, not dulled them. "

- Edgar Allan Poe
"The Tell-Tale Heart"




"Eyers, Daniel" <daniel.eyers@honeywell.com>@midrange.com on 09/19/2000
02:55:02 PM

Please respond to JAVA400-L@midrange.com

Sent by:  owner-java400-l@midrange.com


To:   "'JAVA400-L@midrange.com'" <JAVA400-L@midrange.com>
cc:
Subject:  RE: Preferred method to access databases from Servlets




Can you explain what CRTJVAPGM actually does? Where does the system binary
reside?

I run the command on everything the 400 serves (level 40) but I'm not quite
sure how this works...

Thanks in advance

dan
Honeywell International

-----Original Message-----
From: cujo@us.ibm.com [mailto:cujo@us.ibm.com]
Sent: Tuesday, September 19, 2000 2:55 PM
To: JAVA400-L@midrange.com
Subject: RE: Preferred method to access databases from Servlets



Concerning double interpretation:

1) Java is not an interpreted language (or at least it doesn't have to be).
Between JIT (which you can expect to skyrocket in performance in JDK 1.3 if
everything I have seen it true) and the CRTJVAPGM command/support, you
should not be interpreting Java code.  It runs as system binaries.

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