LRU Cache

In our product MMM, we want to use a cache to improve performance, but after a long time tracking, it retains too much memory.

here is the source, basically.

http://kiss.salzburgresearch.at/cgi-bin/trac.cgi/browser/QVIZ/ikewikiMerge/src/at/srfg/ikewiki/caching/ObjectCache.java?rev=2071

let's find out what is our problem.