org.apache.commons.cache
Class LRUEvictionPolicy

java.lang.Object
  org.apache.commons.cache.LRUEvictionPolicy

All Implemented Interfaces:

Serializable, Iterator, CachedObjectIterator, EvictionPolicy, RetrievalListener, StorageListener

public class LRUEvictionPolicy
extends Object
implements EvictionPolicy, StorageListener, RetrievalListener, CachedObjectIterator

tk.

Version:

$Id: LRUEvictionPolicy.java 155435 2005-02-26 13:17:27Z dirkv $

Author:

Rodney Waldhoff

See Also:

Serialized Form

Field Summary

Cache	_cache
protected boolean	_canRemove
protected WListableObject	_current
protected HashMap	_hash
protected WListableObject	_leastRecent
protected WListableObject	_mostRecent
protected int	_objsbetweennaps
protected long	_sleeptimemillis

Constructor Summary

LRUEvictionPolicy()

LRUEvictionPolicy(int objsbetweennaps, long sleeptimemillis)

Method Summary

protected void	addToList(WListableObject cur)
void	cleared()
void	cleared(Serializable key)
Serializable	getEvictionCandidate()
Serializable[]	getEvictionCandidates(int n)
CachedObjectInfo	getNext()
boolean	hasNext()
Object	next()
void	notRetrieved(Serializable key)
void	notStored(Serializable key, Serializable val, Long expiresAt, Long cost, Serializable group)
void	remove()
protected void	removeFromList(WListableObject cur)
void	retrieved(Serializable key)
void	retrieveRequested(Serializable key)
void	setCache(Cache c) Sets my cache.
void	stored(Serializable key, Serializable val, Long expiresAt, Long cost, Serializable group)
void	storeRequested(Serializable key, Serializable val, Long expiresAt, Long cost, Serializable group)
String	toString()
void	unsetCache() Unsets my cache.

Methods inherited from class java.lang.Object

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

Field Detail

_hash

protected transient HashMap _hash

_leastRecent

protected transient WListableObject _leastRecent

_mostRecent

protected transient WListableObject _mostRecent

_current

protected transient WListableObject _current

_canRemove

protected boolean _canRemove

_cache

public Cache _cache

_objsbetweennaps

protected int _objsbetweennaps

_sleeptimemillis

protected long _sleeptimemillis

Constructor Detail

LRUEvictionPolicy

public LRUEvictionPolicy()

LRUEvictionPolicy

public LRUEvictionPolicy(int objsbetweennaps,
                         long sleeptimemillis)

Method Detail

addToList

protected void addToList(WListableObject cur)

removeFromList

protected void removeFromList(WListableObject cur)

hasNext

public boolean hasNext()

Specified by:

hasNext in interface Iterator

Specified by:

hasNext in interface CachedObjectIterator

getNext

public CachedObjectInfo getNext()
                         throws NoSuchElementException

Specified by:

getNext in interface CachedObjectIterator

Throws:

NoSuchElementException

next

public Object next()
            throws NoSuchElementException

Specified by:

next in interface Iterator

Specified by:

next in interface CachedObjectIterator

Throws:

NoSuchElementException

remove

public void remove()
            throws NoSuchElementException,
                   IllegalStateException

Specified by:

remove in interface Iterator

Specified by:

remove in interface CachedObjectIterator

Throws:

NoSuchElementException

IllegalStateException

setCache

public void setCache(Cache c)

Sets my cache.

Specified by:

setCache in interface EvictionPolicy

unsetCache

public void unsetCache()

Unsets my cache.

Specified by:

unsetCache in interface EvictionPolicy

storeRequested

public void storeRequested(Serializable key,
                           Serializable val,
                           Long expiresAt,
                           Long cost,
                           Serializable group)

Specified by:

storeRequested in interface StorageListener

notStored

public void notStored(Serializable key,
                      Serializable val,
                      Long expiresAt,
                      Long cost,
                      Serializable group)

Specified by:

notStored in interface StorageListener

stored

public void stored(Serializable key,
                   Serializable val,
                   Long expiresAt,
                   Long cost,
                   Serializable group)

Specified by:

stored in interface StorageListener

cleared

public void cleared(Serializable key)

Specified by:

cleared in interface StorageListener

cleared

public void cleared()

Specified by:

cleared in interface StorageListener

retrieveRequested

public void retrieveRequested(Serializable key)

Specified by:

retrieveRequested in interface RetrievalListener

retrieved

public void retrieved(Serializable key)

Specified by:

retrieved in interface RetrievalListener

notRetrieved

public void notRetrieved(Serializable key)

Specified by:

notRetrieved in interface RetrievalListener

getEvictionCandidate

public Serializable getEvictionCandidate()

Specified by:

getEvictionCandidate in interface EvictionPolicy

getEvictionCandidates

public Serializable[] getEvictionCandidates(int n)

Specified by:

getEvictionCandidates in interface EvictionPolicy

toString

public String toString()

Overrides:

toString in class Object