MATSim Code

bugfix

somehow misunderstood the return value of putIfAbsent...

let the cleanup be done by a daemon thread

rename classes: remove "lru" from names

drop the LRU mechanism and use a ConcurrentHashMap for softReferences

using the cache from several threads is currently very slow, because of
synchronization for each put(). ConcurrentHashMap has neat mechanisms to
reduce thread communication to the strict minimum.
The LRu was actually not very useful, given that soft references allow to
keep data almost indefinitely if enough RAM is given.

minor bugfix (LRU contained one element less than specified)

global caches

allow to pass cache by constructor

to allow using a global cache rather than a cache per instance.

bugfix and make adding thread safe

remove rests of qsimconfiggroup