RE: AS400 Toolbox for Java

For the native JDBC driver.  I don't know what release (iSeries) you are
running on, but you should remove the db2_classes.jar file from your
classpath.

If you have the latest PTFs on v4r5, you should have to do *nothing* to get
the driver found.  The symlink needed in the extensions directory should
get created automatically.  I got the JVM team to change this because of
the confusion it caused  people going from JDK 1.1.x to JDK 1.2 (where they
started *not* including the db2_classes.jar file automatically).

There are multiple class loaders and the rules for where things have to be
found for interacting classes are based on where they get loaded from.  You
can cause problems putting extensions in the user class path.  I'm told its
all working right when that happens and I ran out of energy before they
gave me enough understanding that I can explain it well.

Anyway, if the db2_classes.jar file is in the user extensions directory,
and you remove it from the classpath and things don't work, ensure you have
the latest JV1 PTFs applied.  If it still doesn't work, call support to get
it running.  They should be able to fix it up quickly.

Regards,

Richard D. Dettinger
AS/400 Java Data Access Team

"Biologists have a special word for stability -- dead"

                Larry Wall
                Open Source Developers Journal
                Issue 1, Jan  2000


Dave Wall/Rochester/IBM@IBMUS@midrange.com on 05/22/2001 08:35:56 AM

Please respond to JAVA400-L@midrange.com

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


To:   JAVA400-L@midrange.com
cc:
Subject:  RE: AS400 Toolbox for Java




I can answer the Toolbox part.  The Toolbox classes for running remote Java
programs do not forward environment values (such as current directory and
current classpath) to the target Java environment.  You must set these
values on the object which will forward them to the server.  Use the setter
method on the object or the command line parms on the utility to set
classpath before calling the remote java program.  In your case it would be
something like:
     AS400 system = new AS400();
     JavaApplicationCall jac = new JavaApplicationCall(system);
     jac.setJavaApplication(Test);               // assuming your program
is in the default package
     jac.setClassPath
("/AGTJAVA/AGTCOMP/AS400:/QIBM/ProdData/Java400/ext/db2_classes.jar");
     jac.run();
     ...


David Wall
AS/400 Toolbox for Java


"Xu, Weining" <Weining.Xu@AIG.com>@midrange.com on 05/22/2001 08:02:00 AM

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: AS400 Toolbox for Java

Let me rephrase my questions.

I have a Java program Test.class reside in AS400 IFS directory:
/AGTJAVA/AGTCOMP/AS400/Test.class.  This is a JDBC program using AS400 DB2
native JDBC driver.

The JVM on AS400 is version 1.2.2.
I set ENVVAR (*SYS) as CLASSPATH
= '.:/QIBM/ProdData/Java400/ext/db2_classes.jar'
I also did:  ADDLNK OBJ('/QIBM/ProdData/Java400/ext/db2_classes.jar')
NEWLNK
('/QIBM/UserData/Java400/ext/db2_classes.jar')

My program has no problem run from AS400 Qshell (by cd to
/AGTJAVA/AGTCOMP/AS400 directory and do JAVA Test). But I can not run the
same program from AS400 command line as: RUNJVA CLASS
('/AGTJAVA/AGTCOMP/AS400/Test').  I got "java.lang.NoClassDefFoundError".

Also I create a client Java GUI by using JavaAppliactionCall and
VJavaAppliactionCall classes from AS400 Toolbox for Java. Then I call the
same Test program on AS400.  I got the same
"java.lang.NoClassDefFoundError" error.

What could be wrong here? Thanks for your help.



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