[xwiki-devs] Cache needs

Hi Thomas, I know you're working on the new cache component (btw would be nice if you could send an email with your planned architecture/api so that it can be reviewed - like show the APIs) so I thought I should give you some needs/ideas I have on this topic. * We need several types of local caches. I can see at least the following types: - a timed cache. I need this for example to cache macros - a cache with a fixed given capacity and expiring the oldest entries (not really sure where we need this right now but it looks common enough) - a cache with a fixed given capacity and expiring the least accessed entries (not really sure where we need this right now but it looks common enough) - a cache with unlimited capacity and bound only by the memory available. The way to implement this is using PhantomReference. Basically it's the JVM that calls back the reference to tell it it needs memory. I was told that the new google collections api have some code that do this (I think FinalizablePhantomReference). This cache is the one I would use to save wiki pages' AST in memory. Of course we shouldn't implement anything ourselves and we should use existing framework(s) underneath our own API for the Cache API. WDYT? Links: * http://www.realjenius.com/node/377 * http://www.javalobby.org/forums/thread.jspa?threadID=16520&messageID=91… Thanks -Vincent