accessing the Tomcat classes in a web app

I'd like to access the classes implementing Tomcat in my web app (to get the current Realm, as described here). The Tomcat docs mention that those classes are off-limits to web apps, and indeed this doesn't work for me (the class is not found).
Since this is apparently possible in general, the question is: How do I need to rearrange the Tomcat jars to make this work, or which setting needs to be tweaked?

Thanks,
Ulf
[ November 08, 2005: Message edited by: Ulf Dittmer ]

Have you looked at the "privileged" attribute of "Context"?
http://tomcat.apache.org/tomcat-5.5-doc/config/context.html

No, I didn't. From the description I wouldn't have thought that it has any bearing on this. I'll give it a try.

Thanks Ben, that did the trick. I'll make a suggestion to enhance the documentation.

A suggestion would be good.
A patch would be better

Glad it's working