Can anyone suggest a way to achieve dynamic servlet mappings in tomcat 5.5.

What I want to do is run a web app with any number of paths all pointing to
one servlet.  These paths would be loaded from a database and extra paths
can be added at runtime by the user.  So an example would be
www.domain.com/sample and www.domain.com/anothersample would both execute
the same servlet.

Another option I thought of was having a custom 404 servlet that would check
the request supplied and then redirect.