Re: [Condor-users] JVM System Parameters!!

[Michael Remijan <remijan@xxxxxxxxxxxxx>]

Greg,

Thanks for the advise.  Actually an easier way is to use a file such as 
"jvm.properties" and then add that file to transfer_input_files of the 
submit files.  I can then do something nice and simple like:

InputStream is = this.getClass().getResourceAsStream("/jvm.properties");
Properties props = System.getProperties();
props.load(is);

It's a little more elegant solution.


At 04:33 PM 2/1/2005, Greg Thain wrote:


> Michael Remijan wrote:
>
> > If I am running a Java universe job, what can I use in my submit file to 
> > pass along Java system parameters?  When running a Java application, JVM 
> > system parameters look like this:
> > /usr/bin/java -DMyJVMParam1=Ni-DMyJVMParam2=Spam .....
>
> There's no good way to do this in Condor today.  In the config file, you 
> can set the java VM command-line arguments, but that's for all java
> invocations for a given startd, which is probably not what you want.
>
> Probably the best way to do this today is to write a small Java
> wrapper which reads -Dprop1=val1 style property settings from the leading 
> command-line arguments, calls System.setProperties() itself, then uses 
> reflection to invoke your real main class and args from the remaining 
> command line arguments.
>
> That is, instead of running
>
> java -Dfoo=bar -Dbaz=zoof MyClass MyArg1 MyArg2
>
> you'd run
>
> java MyWrapper -Dfoo=bar -Dbaz=zoof MyClass MyArg1 MyArg2
>
> Although that's kind of hacky, it should work in the general case.  Of 
> course, if you have access to the source of MyClass, it'd be easier
> to add support directly there to set system properties from -Dfoo=bar
> style command-line arguments.
>
> Still, this is unseemly enough that I'll look into adding proper support
> for java properties in an upcoming condor developer series release.
>
> -greg
>
>
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