org.exoplatform.services.cache.concurrent
Class ConcurrentFIFOExoCache<K extends Serializable,V>

java.lang.Object
  org.exoplatform.services.cache.concurrent.ConcurrentFIFOExoCache<K,V>

All Implemented Interfaces:

ExoCache<K,V>

Direct Known Subclasses:

FIFOExoCache, SimpleExoCache

public class ConcurrentFIFOExoCache<K extends Serializable,V>
extends Object
implements ExoCache<K,V>

An ExoCache implementation based on ConcurrentHashMap that minimize locking. Cache entries are maintained in a fifo list that is used for the fifo eviction policy.

Version:

$Revision$

Author:

Julien Viet

Constructor Summary

ConcurrentFIFOExoCache()

ConcurrentFIFOExoCache(int maxSize)

ConcurrentFIFOExoCache(int maxSize, Log log)

ConcurrentFIFOExoCache(Log log)

ConcurrentFIFOExoCache(String name, int maxSize)

ConcurrentFIFOExoCache(String name, int maxSize, Log log)

Method Summary

void	addCacheListener(CacheListener<? super K,? super V> listener) Add a listener.
void	assertConsistent()
void	clearCache() Clears the cache.
V	get(Serializable name) Performs a lookup operation.
List<? extends V>	getCachedObjects() Returns a list of cached object that are considered as valid when the method is called.
int	getCacheHit() Returns the number of time the cache was queried and a valid entry was returned.
int	getCacheMiss() Returns the number of time the cache was queried and no entry was returned.
int	getCacheSize() Returns the number of entries in the cache.
String	getLabel() Returns the cache label
long	getLiveTime() Returns the maximum life time of an entry in the cache.
long	getLiveTimeMillis()
int	getMaxSize() Returns the maximum capacity of the cache.
String	getName() Returns the cache name
boolean	isLogEnabled()
void	put(K name, V obj) Performs a put in the cache.
void	putMap(Map<? extends K,? extends V> objs) Performs a put of all the entries provided by the map argument.
V	remove(Serializable name) Removes an entry from the cache.
List<? extends V>	removeCachedObjects() Clears the cache and returns the list of cached object that are considered as valid when the method is called.
void	select(CachedObjectSelector<? super K,? super V> selector) Selects a subset of the cache.
void	setLabel(String name) Sets the cache label
void	setLiveTime(long period) Sets the maximum life time of an entry in the cache.
void	setLiveTimeMillis(long liveTimeMillis)
void	setLogEnabled(boolean logEnabled)
void	setMaxSize(int max) Sets the maximum capacity of the cache.
void	setName(String s) Sets the cache name.

Methods inherited from class java.lang.Object

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

Constructor Detail

ConcurrentFIFOExoCache

public ConcurrentFIFOExoCache()

ConcurrentFIFOExoCache

public ConcurrentFIFOExoCache(Log log)

ConcurrentFIFOExoCache

public ConcurrentFIFOExoCache(int maxSize)

ConcurrentFIFOExoCache

public ConcurrentFIFOExoCache(int maxSize,
                              Log log)

ConcurrentFIFOExoCache

public ConcurrentFIFOExoCache(String name,
                              int maxSize)

ConcurrentFIFOExoCache

public ConcurrentFIFOExoCache(String name,
                              int maxSize,
                              Log log)

Method Detail

assertConsistent

public void assertConsistent()

getName

public String getName()

Description copied from interface: ExoCache

Returns the cache name

Specified by:

getName in interface ExoCache<K extends Serializable,V>

Returns:

the cache name

setName

public void setName(String s)

Description copied from interface: ExoCache

Sets the cache name.

Specified by:

setName in interface ExoCache<K extends Serializable,V>

Parameters:

s - the cache name

getLabel

public String getLabel()

Description copied from interface: ExoCache

Returns the cache label

Specified by:

getLabel in interface ExoCache<K extends Serializable,V>

Returns:

the cache label

setLabel

public void setLabel(String name)

Description copied from interface: ExoCache

Sets the cache label

Specified by:

setLabel in interface ExoCache<K extends Serializable,V>

Parameters:

name - the cache label

getLiveTime

public long getLiveTime()

Description copied from interface: ExoCache

Returns the maximum life time of an entry in the cache. The life time is a value in seconds, a negative value means that the life time is infinite.

Specified by:

getLiveTime in interface ExoCache<K extends Serializable,V>

Returns:

the live time

setLiveTime

public void setLiveTime(long period)

Description copied from interface: ExoCache

Sets the maximum life time of an entry in the cache.

Specified by:

setLiveTime in interface ExoCache<K extends Serializable,V>

Parameters:

period - the live time

getLiveTimeMillis

public long getLiveTimeMillis()

setLiveTimeMillis

public void setLiveTimeMillis(long liveTimeMillis)

getMaxSize

public int getMaxSize()

Description copied from interface: ExoCache

Returns the maximum capacity of the cache.

Specified by:

getMaxSize in interface ExoCache<K extends Serializable,V>

Returns:

the maximum capacity

setMaxSize

public void setMaxSize(int max)

Description copied from interface: ExoCache

Sets the maximum capacity of the cache.

Specified by:

setMaxSize in interface ExoCache<K extends Serializable,V>

Parameters:

max - the maximum capacity

get

public V get(Serializable name)

Description copied from interface: ExoCache

Performs a lookup operation.

Specified by:

get in interface ExoCache<K extends Serializable,V>

Parameters:

name - the cache key

Returns:

the cached value which may be evaluated to null

put

public void put(K name,
                V obj)

Description copied from interface: ExoCache

Performs a put in the cache.

Specified by:

put in interface ExoCache<K extends Serializable,V>

Parameters:

name - the cache key

obj - the cached value

putMap

public void putMap(Map<? extends K,? extends V> objs)

Description copied from interface: ExoCache

Performs a put of all the entries provided by the map argument.

Specified by:

putMap in interface ExoCache<K extends Serializable,V>

Parameters:

objs - the objects to put

remove

public V remove(Serializable name)

Description copied from interface: ExoCache

Removes an entry from the cache.

Specified by:

remove in interface ExoCache<K extends Serializable,V>

Parameters:

name - the cache key

Returns:

the previously cached value or null if no entry existed or that entry value was evaluated to null

getCachedObjects

public List<? extends V> getCachedObjects()

Description copied from interface: ExoCache

Returns a list of cached object that are considered as valid when the method is called. Any non valid object will not be returnted.

Specified by:

getCachedObjects in interface ExoCache<K extends Serializable,V>

Returns:

the list of cached objects

removeCachedObjects

public List<? extends V> removeCachedObjects()

Description copied from interface: ExoCache

Clears the cache and returns the list of cached object that are considered as valid when the method is called. Any non valid object will not be returned.

Specified by:

removeCachedObjects in interface ExoCache<K extends Serializable,V>

Returns:

the list of cached objects

clearCache

public void clearCache()

Description copied from interface: ExoCache

Clears the cache.

Specified by:

clearCache in interface ExoCache<K extends Serializable,V>

select

public void select(CachedObjectSelector<? super K,? super V> selector)
            throws Exception

Description copied from interface: ExoCache

Selects a subset of the cache.

Specified by:

select in interface ExoCache<K extends Serializable,V>

Parameters:

selector - the selector

Throws:

Exception - any exception

getCacheSize

public int getCacheSize()

Description copied from interface: ExoCache

Returns the number of entries in the cache.

Specified by:

getCacheSize in interface ExoCache<K extends Serializable,V>

Returns:

the size of the cache

getCacheHit

public int getCacheHit()

Description copied from interface: ExoCache

Returns the number of time the cache was queried and a valid entry was returned.

Specified by:

getCacheHit in interface ExoCache<K extends Serializable,V>

Returns:

the cache hits

getCacheMiss

public int getCacheMiss()

Description copied from interface: ExoCache

Returns the number of time the cache was queried and no entry was returned.

Specified by:

getCacheMiss in interface ExoCache<K extends Serializable,V>

Returns:

the cache misses

addCacheListener

public void addCacheListener(CacheListener<? super K,? super V> listener)

Description copied from interface: ExoCache

Add a listener.

Specified by:

addCacheListener in interface ExoCache<K extends Serializable,V>

Parameters:

listener - the listener to add

isLogEnabled

public boolean isLogEnabled()

Specified by:

isLogEnabled in interface ExoCache<K extends Serializable,V>

setLogEnabled

public void setLogEnabled(boolean logEnabled)

Specified by:

setLogEnabled in interface ExoCache<K extends Serializable,V>