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how to set multiple classpaths? [message #190567]

Fri, 15 September 2006 10:45

Eclipse User

I solved most recognition problems with Jason's advice to put:
System.setProperty( EngineConstants.WEBAPP_CLASSPATH_KEY,

"c:/myclasses" );

My problem now is that I have to add third party jars located in the lib
directory in addition to my classes to my classpath.

Jason when is your book coming out?

Thanks,
Jim

Re: how to set multiple classpaths? [message #190591 is a reply to message #190567]

Fri, 15 September 2006 11:11

Eclipse User

Jim,

This is tricky because of the way Eclipse plugins do class loading.
Here is a good article on what Eclipse does.
http://www.eclipsezone.com/articles/eclipse-vms/

I needed to add to the classpath in one of my plugins and used code similar
to what is in the BIRT jdbc driver.

oldloader = thread.getContextClassLoader();

refreshURLs();

ClassLoader changeLoader = new URLClassLoader( (URL [])URLList.toArray(new
URL[0]),thread.getContextClassLoader());

thread.setContextClassLoader(changeLoader);

..

..

..

finally{

thread.setContextClassLoader(oldloader);

}

The refreshURLs function just builds the list to add to the classpath.

Jason

"James Leotta" <jleotta@bascom.com> wrote in message
news:eeee79$oji$1@utils.eclipse.org...
>I solved most recognition problems with Jason's advice to put:
> System.setProperty( EngineConstants.WEBAPP_CLASSPATH_KEY,
>
> "c:/myclasses" );
>
> My problem now is that I have to add third party jars located in the lib
> directory in addition to my classes to my classpath.
>
> Jason when is your book coming out?
>
> Thanks,
> Jim

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