Re: How to specify which JVM to use?

[Pete Helgren <Pete@xxxxxxxxxx>]

So you want the JVM to be unique to the user who runs the app or is this 
a modification needed at installation?

Are you launching from a CL program?  Perhaps a routine the selects the 
requested JVM and then updates the invocation parameters before running 
the QSH command to invoke the program?  Or maybe a variable that can be 
passed to a shell script and used to set the JAVA_HOME parameter there?

Not knowing how you are invoking the app I can't think of the *best* way 
but those are things I have done in order to set JVM's that differ 
between apps.

Pete


David Gibbs wrote:
> I'm in a bit of a quandary here ... I'm trying to figure out the best way to allow customers to specify which version of the JVM they want to use with a Java application on the i.
>
> There are multiple JVM's available ... 64bit Classic, 32bit PASE, and 64bit PASE.
>
> For the classic JVM, you can specify the java.version property in the System.properties, SystemDefault.properties file, or on the command line.
>
> But with the PASE JVM's, the java version is specified using the JAVA_HOME environment variable.
>
> Is it possible to have the JAVA_HOME environment variable set specifically at the user level?
>
> I tried putting "export JAVA_HOME=/QIBM/ProdData/Java400/jdk15" in the users .profile file, which was picked up in qshell, but not in a direct JAVA invocation.
>
> I also tried putting 'java.home=/QOpenSys/QIBM/ProdData/JavaVM/jdk50/32bit' in the users SystemDefault.properties file, but got either errors or the value was ignored (different behavior for different OS versions).
>
> Any thoughts?
>
> Thanks!
>
> david
>
>