com.easyjf.cache.store
Class LruMemoryStore

java.lang.Object
  com.easyjf.cache.store.MemoryStore
      com.easyjf.cache.store.LruMemoryStore

All Implemented Interfaces:

Store

public class LruMemoryStore

extends MemoryStore

An implementation of a LruMemoryStore.

This uses LinkedHashMap as its backing map. It uses the LinkedHashMap LRU feature. LRU for this implementation means least recently accessed.

Version:

$Id: LruMemoryStore.java,v 1.8 2005/10/14 02:12:58 gregluck Exp $

Author:

Greg Luck

Nested Class Summary

class	LruMemoryStore.SpoolingLinkedHashMap An extension of LinkedHashMap which overrides #removeEldestEntry to persist cache entries to the auxiliary cache before they are removed.
class	LruMemoryStore.SpoolingLRUMap An LRU Map implementation based on Apache Commons LRUMap.

Constructor Summary

LruMemoryStore(ICache cache)
Constructor for the LruMemoryStore object The backing LinkedHashMap is created with LRU by access order.

Method Summary

java.util.Map

loadMapInstance() Tries to load a LinkedHashMap (JDK1.4) and then tries to load an LRUMap.

Methods inherited from class com.easyjf.cache.store.MemoryStore

containsKey, create, dispose, get, getKeyArray, getKeySet, getQuiet, getSize, getSizeInBytes, getStatus, put, remove, removeAll, removeElement

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

LruMemoryStore

public LruMemoryStore(ICache cache)

Constructor for the LruMemoryStore object The backing LinkedHashMap is created with LRU by access order.

Method Detail

loadMapInstance

public java.util.Map loadMapInstance()
                              throws CacheException

Tries to load a LinkedHashMap (JDK1.4) and then tries to load an LRUMap.

This way applications running JDK1.4 do not have a dependency on Apache commons-collections.

Returns:

a Map, being either LinkedHashMap or

Throws:

CacheException