Package org.apache.commons.jcs3.engine.memory.mru

Class MRUMemoryCache<K,V>

java.lang.Object

org.apache.commons.jcs3.engine.memory.AbstractMemoryCache<K,V>

org.apache.commons.jcs3.engine.memory.AbstractDoubleLinkedListMemoryCache<K,V>

org.apache.commons.jcs3.engine.memory.mru.MRUMemoryCache<K,V>

All Implemented Interfaces:

IMemoryCache<K,V>

public class MRUMemoryCache<K,V>
extends AbstractDoubleLinkedListMemoryCache<K,V>

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.

Field Summary

Fields inherited from class org.apache.commons.jcs3.engine.memory.AbstractDoubleLinkedListMemoryCache

list

Fields inherited from class org.apache.commons.jcs3.engine.memory.AbstractMemoryCache

chunkSize, hitCnt, lock, map, missCnt, putCnt

Constructor Summary

Constructors

Constructor	Description
MRUMemoryCache()

Method Summary

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

Methods inherited from class org.apache.commons.jcs3.engine.memory.AbstractDoubleLinkedListMemoryCache

addFirst, addLast, createMap, freeElements, get, getStatistics, initialize, lockedGetElement, lockedRemoveAll, lockedRemoveElement, update

Methods inherited from class org.apache.commons.jcs3.engine.memory.AbstractMemoryCache

dispose, dumpMap, getCacheAttributes, getCacheName, getCompositeCache, getKeySet, getMultiple, getQuiet, getSize, remove, removeAll, removeByGroup, removeByHierarchy, setCacheAttributes, waterfal

Methods inherited from class java.lang.Object

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

Constructor Details

MRUMemoryCache

public MRUMemoryCache()

Method Details

adjustListForUpdate

protected MemoryElementDescriptor<K,V> adjustListForUpdate(ICacheElement<K,V> ce)
                                                    throws 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 should be different. Perhaps this should remove the oldest if full, and then put.

Specified by:

adjustListForUpdate in class AbstractDoubleLinkedListMemoryCache<K,V>

Parameters:

ce -

Returns:

MemoryElementDescriptor the new node

Throws:

IOException

adjustListForGet

protected void adjustListForGet(MemoryElementDescriptor<K,V> me)

Makes the item the last in the list.

Specified by:

adjustListForGet in class AbstractDoubleLinkedListMemoryCache<K,V>

Parameters:

me -