net.sf.swarmcache
Class LRUCache

java.lang.Object
  net.sf.swarmcache.LRUCache

All Implemented Interfaces:

ObjectCache

public class LRUCache
extends java.lang.Object
implements ObjectCache

Cache implementation that uses the Least Recently Used algorithm. This algorithm provides good cache hit frequency.

Author:

John Watkinson

Nested Class Summary

class

LRUCache.ListeningLRUMap

Field Summary

static int	DEFAULT_CACHE_SIZE The default cache size (1000).
static java.lang.String	LRU_CACHE_SIZE_PROPERTY The property containing the maximum number of objects to cache.

Constructor Summary

LRUCache()

Method Summary

java.lang.Object	clear(java.io.Serializable key) Clears an object from the cache by key.
void	clearAll() Clears the entire cache.
java.lang.Object	get(java.io.Serializable key) Gets an object from the cache by key, or returns null if that object is not cached.
java.util.Set	getAllKeys() Get all items.
java.lang.String	getType() Gets the common name of the type of objects to cache.
void	put(java.io.Serializable key, java.lang.Object object) Adds an object to the cache.
void	setListener(LRUCacheListener l)
void	setSize(int newSize)
void	setType(java.lang.String type) Sets the common name of the type of objects to cache.

Methods inherited from class java.lang.Object

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

Field Detail

LRU_CACHE_SIZE_PROPERTY

public static final java.lang.String LRU_CACHE_SIZE_PROPERTY

The property containing the maximum number of objects to cache.

See Also:

Constant Field Values

DEFAULT_CACHE_SIZE

public static final int DEFAULT_CACHE_SIZE

The default cache size (1000).

See Also:

Constant Field Values

Constructor Detail

LRUCache

public LRUCache()

Method Detail

setSize

public void setSize(int newSize)

getType

public java.lang.String getType()

Description copied from interface: ObjectCache

Gets the common name of the type of objects to cache.

Specified by:

getType in interface ObjectCache

setType

public void setType(java.lang.String type)

Description copied from interface: ObjectCache

Sets the common name of the type of objects to cache.

Specified by:

setType in interface ObjectCache

put

public void put(java.io.Serializable key,
                java.lang.Object object)

Description copied from interface: ObjectCache

Adds an object to the cache.

Specified by:

put in interface ObjectCache

get

public java.lang.Object get(java.io.Serializable key)

Description copied from interface: ObjectCache

Gets an object from the cache by key, or returns null if that object is not cached.

Specified by:

get in interface ObjectCache

clear

public java.lang.Object clear(java.io.Serializable key)

Description copied from interface: ObjectCache

Clears an object from the cache by key.

Specified by:

clear in interface ObjectCache

clearAll

public void clearAll()

Description copied from interface: ObjectCache

Clears the entire cache.

Specified by:

clearAll in interface ObjectCache

setListener

public void setListener(LRUCacheListener l)

getAllKeys

public java.util.Set getAllKeys()

Description copied from interface: ObjectCache

Get all items.

Specified by:

getAllKeys in interface ObjectCache