RE: Classpath Setting Using only Folders -- JAVA400-L

Joe:

I am very careful about putting things in the ext library. It is
equivalent to putting programs and commands in QUSRSYS. The jars are
available whether you mean for them to be or not. Guess that can be a
good or bad thing.

I would only put a jar in the extension library if it was something I
used frequently and did not change (much). For example apache log4j.

Generally I start RUNJVA from a CL and building the classpath in a CL
variable and then using that to ADD or CHG the environment variable
CLASSPATH.

For example:

DCL &CLASSPATH *CHAR 1024

CHGVAR &CLASSPATH ('/java/sysmon:/java/log4j-1.2.14.jar')
CHGVAR &CLASSPATH (&CLASSPATH *TCAT ':/java/sysmon/jt400Native.jar')
CHGVAR &CLASSPATH (&CLASSPATH *TCAT ':/java/sysmon/sqljdbc.jar')

One jar file per line -- I find that easier to keep track of.

I suppose the jar files could be put into a AS400 file and use RCVF to
read the file and build the classpath CL variable.

Regards
Bill Blalock

-----Original Message-----
From: java400-l-bounces@xxxxxxxxxxxx
[mailto:java400-l-bounces@xxxxxxxxxxxx] On Behalf Of Joe Sam Shirah
Sent: Monday, April 20, 2009 11:57 AM
To: Java Programming on and around the iSeries / AS400
Subject: Re: Classpath Setting Using only Folders

Hi Scott,

One possibility is the Extension Mechanism Architecture using the
java.ext.dirs system property. If you do that, you should include the
standard extension directory as well. See:

http://java.sun.com/j2se/1.4.2/docs/guide/extensions/spec.html#installed

Joe Sam

Joe Sam Shirah - http://www.conceptgo.com
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----- Original Message -----
From: "Scott Johnson" <sjohnson@xxxxxxxxxxxxxxx>
To: <JAVA400-L@xxxxxxxxxxxx>
Sent: Monday, April 20, 2009 10:30 AM
Subject: Classpath Setting Using only Folders

Is it possible to specify the directory path to a folder containing
multiple jar files and not have to specify the jar files directly?

This

is
for calling Java stuff from within RPG on an i5 running jvm 1.5.

I have tried searching for good examples, but they all show specifying

the

jar directly in the ClassPath. I have tested different scenarios and

none

seem to work. The java guy here says that in the windows realm they do
something like: "C:\jardir\*;E:\morejars\*". Using '*' does not work

i5.

When dealing with something like JasperReports, specifying all the

jars it

uses gets out of hand. I would rather just specify the folder

containing

the jars.

Examples I have tried:
/QIBM/UserData/Java400/ext/JasperReports
/QIBM/UserData/Java400/ext/JasperReports/
/QIBM/UserData/Java400/ext/JasperReports/*

Thanks,
Scott J