-none- 2007-08-16 - By Matthew Kerle
Back
Peter,
you're exactly right.
***code***
Class c1 = request.getUserPrincipal().getClass(); //get the class of the
Principal that tomcat created , which is a MemoryUser instance
Class c2 = MemoryUser.class; // get the class loaded by the current loader
System.out.println(c1.getClassLoader().getClass.getName()); //prints
"org.apache.catalina.loader.StandardClassLoader"
System.out.println(c2.getClassLoader().getClass.getName()); //prints
"org.apache.catalina.loader.WebappClassLoader"
Great, so now I've got two different classloaders. Do you know if
there's any way I can cast the Principal to a Memoryuser object and use
it? do I have to load the MemoryUser class in the current classloader?
full kudos for figuring out the problem exactly, I never would have
thought of that!
ps - This would be entertaining, if only I was the one who got to watch
someone else wade through this!
Peter Crowther wrote:
>> From: Matthew Kerle [mailto:matthew.kerle@(protected)]
>> So what this is saying is that the *names* of the classes are
>> the same,
>> but the actual classes are different. this is crazy...
>>
>
> I suspect the two classes are being loaded by different classloaders - a
> common and entertaining* problem in Tomcat and other servlet containers.
> You can find out by asking each for its classloader and comparing.
>
> - Peter
>
> * Depending on whether you're watching someone else try to solve the
> problem, or having to wade through it yourself. Best of luck!
>
>
>
--
Matthew Kerle
IT Consultant
Canberra, Australia
Mobile: +61404 096 863
Email : mattkerle@(protected)
Web : http://threebrightlights.blogspot.com/
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