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From MrVisser <mrvis...@gmail.com>
Subject Re: Instantiating a class in shared/lib
Date Mon, 14 Jul 2008 21:28:24 GMT

Umm.. I fixed my directories and I'm getting the same problem :(

Now both A.jar and B.jar are in shared/lib, and the same problem occurs.

loadClass will find spring.B, but Class.forName crashes when trying to
initialize it..

Any thoughts?

Thanks,

Branden


MrVisser wrote:
> 
> Hello,
> 
> I'm using spring, and invoking the application context to load on a static
> method.
> 
> I am triggering this static method in the init() method of a servlet.
> 
> I have the following 3 classes:
> 
> public interface api.A
> public class static.A  //which has static method load(String implClass)
> public class spring.B implements A //which contains all spring
> dependencies
> 
> to keep my API from having spring dependencies, I do something like
> following method inside my servlet:
> 
> A a = static.A.load("spring.B"); //actually, the impl string is in a
> properties file
> 
> Now, if api.A and static.A are in A.jar, and spring.B is in spring.jar,
> Class.forName("example.spring.B") does not work (the thread just dies with
> no exception thrown or anything). However,
> Thread.currentThread().getContextClassLoader().loadClass("spring.B") will
> successfully get a reference to the Class object. It just cannot be
> initialized.
> 
> If I move spring.B into A.jar with the rest, everything works fine. This
> holds true with any combination of these JAR files being in common/lib or
> shared/lib.
> 
> What am I missing? Please let me know if you need more information.
> 
> Thanks,
> 
> Branden
> 

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