entry removal event

[Zohar]

Hello,
I'm new to JCS, so please accept the usual grabble... 
I need to use JCS to cache data regarding files I use in my system. I don't 
think it's necessary to keep the files themselves in cache, just their path. 
When a file's cache entry is deleted (e.g., was used too long ago), I need to 
delete the underlying file itself. How do I do that? 
Thanks,
Zohar.