Questions concerning component caching

System

Hello all,

I have a situation where I have multiple 'biography' DCRs. I would like to have only one index.page file, where the biography component sits. I'm halfway to a solution, which involves using a java pre-controller on any url with the pattern:

mysite.com/biographies/*

So, for instance, the pre-controller would receive a request for

mysite.com/biographies/ron-perlman

and point the component to the corresponding DCR.

My problem is when it comes to caching. If LSDS has cached the ron-perlman page, and I submit an update to that DCR, how do I indicate that the component should recache the new version upon the next request?

I'm in a bit of confusion, as the cogency of my post may indicate. Let me know if I need to clarify anything. Any help will be much appreciated.