org.apache.jcs.engine.memory.mru

Class MRUMemoryCache

java.lang.Object

org.apache.jcs.engine.memory.AbstractMemoryCache

org.apache.jcs.engine.memory.AbstractDoulbeLinkedListMemoryCache

org.apache.jcs.engine.memory.mru.MRUMemoryCache

All Implemented Interfaces:

java.io.Serializable, IMemoryCache, MemoryCache

public class MRUMemoryCache
extends AbstractDoulbeLinkedListMemoryCache

The most recently used items move to the front of the list and get spooled to disk if the cache hub is configured to use a disk cache.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.jcs.engine.memory.AbstractDoulbeLinkedListMemoryCache

AbstractDoulbeLinkedListMemoryCache.IteratorWrapper, AbstractDoulbeLinkedListMemoryCache.MapEntryWrapper

Field Summary

Fields inherited from class org.apache.jcs.engine.memory.AbstractDoulbeLinkedListMemoryCache

hitCnt, list, missCnt

Fields inherited from class org.apache.jcs.engine.memory.AbstractMemoryCache

attr, cache, cacheName, cattr, chunkSize, map, status

Constructor Summary

Constructors

Constructor and Description
MRUMemoryCache()

Method Summary

Methods

Modifier and Type	Method and Description
protected void	adjustListForGet(MemoryElementDescriptor me) Makes the item the last in the list.
protected MemoryElementDescriptor	adjustListForUpdate(ICacheElement ce) Adds the item to the front of the list.

Methods inherited from class org.apache.jcs.engine.memory.AbstractDoulbeLinkedListMemoryCache

addFirst, addLast, createMap, dumpCacheEntries, dumpCacheSize, dumpMap, freeElements, get, getIterator, getKeyArray, getStatistics, initialize, remove, removeAll, spoolLastElement, update, verifyCache

Methods inherited from class org.apache.jcs.engine.memory.AbstractMemoryCache

dispose, getCacheAttributes, getCacheName, getCompositeCache, getGroupKeys, getMultiple, getQuiet, getSize, getStatus, setCacheAttributes, waterfal

Methods inherited from class java.lang.Object

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

Constructor Detail

MRUMemoryCache

public MRUMemoryCache()

Method Detail

adjustListForUpdate

protected MemoryElementDescriptor adjustListForUpdate(ICacheElement ce)
                                               throws java.io.IOException

Adds the item to the front of the list. A put doesn't count as a usage.

It's not clear if the put operation sould be different. Perhaps this should remove the oldest if full, and then put.

Specified by:

adjustListForUpdate in class AbstractDoulbeLinkedListMemoryCache

Parameters:

ce -

Returns:

MemoryElementDescriptor the new node

Throws:

java.io.IOException

adjustListForGet

protected void adjustListForGet(MemoryElementDescriptor me)

Makes the item the last in the list.

Specified by:

adjustListForGet in class AbstractDoulbeLinkedListMemoryCache

Parameters:

me -