Struts 2 custom ClassLoader

Hi, ranchers!
I'm working on a big java web project, which is based on Struts 2 framework. Now we are going to do some refactoring and split the project up in some parts: core and other auxillary functionality modules. Core classes located under classpath, but all the auxillary functionality classes will be moved to database and loaded via our custom ClassLoader. Among these classes there are some Stuts actions and part of the struts.xml file with appropriate mapping.
How can I make Struts 2 aware of my custom ClassLoader in order to load these auxillary action classes from DB. Currently Struts cannot find and instantinate any of them

Any suggestions would be very appreciated!

Thank you in advance for any useful answer.

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