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

Hi Bill,

I, and I'm sure the rest of the list, appreciate knowing your habits,
but the OP was Scott. Secondly, implicit in my response of:

java.ext.dirs system property. If you do that, you should include
the standard extension directory as well.

was the notion of using *one's own* ext dir in combination with the standard
one. If one uses the standard ext lib, the java.ext.dirs property is not
needed.

If the OP read the included link, he would see that dumping jars in the
standard ext lib would impact everything. If one uses one's own ext dir and
invokes Java with the java.ext.dirs property, it is in effect only for that
run of the JVM. Whether either of those is a good solution is really up to
the developer, who, one hopes, has a good understanding of her needs.

The real point is that, short of writing one's own utility, that's the
only standard way I'm aware of "Classpath Setting Using only Folders" prior
to Java 6. I believe that was the question.

Joe Sam

Joe Sam Shirah - http://www.conceptgo.com
conceptGO - Consulting/Development/Outsourcing
Java Filter Forum: http://www.ibm.com/developerworks/java/
Just the JDBC FAQs: http://www.jguru.com/faq/JDBC
Going International? http://www.jguru.com/faq/I18N
Que Java400? http://www.jguru.com/faq/Java400

----- Original Message ----- From: "Blalock, Bill" <Bill.Blalock@xxxxxxxx>
To: "Java Programming on and around the iSeries / AS400"
<java400-l@xxxxxxxxxxxx>
Sent: Monday, April 20, 2009 3:47 PM
Subject: RE: Classpath Setting Using only Folders

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
conceptGO - Consulting/Development/Outsourcing
Java Filter Forum: http://www.ibm.com/developerworks/java/
Just the JDBC FAQs: http://www.jguru.com/faq/JDBC
Going International? http://www.jguru.com/faq/I18N
Que Java400? http://www.jguru.com/faq/Java400

----- 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

on

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

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