adding apache slide features...

Hi,

   We're looking for an implementation of webDAV and a JSR-170 repository.

   Apache slide seems to fit in both categories wich is great, but we're
wondering if it would be easy (are least if it is worth a try) to add some
code to some methods of the WebDAV tier  implementation of apache slide to
be triggered when invoked through that webdav protocol tier, I mean, we
would like to have some actions taken when someone puts a file on certain
folders. We also would like to modify apache slide's authentication
mechanism to use our custom authentication service.

   Our goal will be to have a JSR-170 repository with lots of user spaces
where each user would be able to see their files and in certain folders our
users would be able to put files which would trigger certain application
logic.

Is this possible?, is apache slide our choice? if not, any info on an open
source product to allow us to do what we want?

greets,