Package org.alfresco.repo.cache

Class NullCache<K extends Serializable,V>

java.lang.Object

org.alfresco.repo.cache.NullCache<K,V>

All Implemented Interfaces:

SimpleCache<K,V>

public class NullCache<K extends Serializable,V>
extends Object
implements SimpleCache<K,V>

A cache that does nothing - always.

There are conditions under which code that expects to be caching, should not be. Using this cache, it becomes possible to configure a valid cache in whilst still ensuring that the actual caching is not performed.

Author:

Derek Hulley

Constructor Summary

Constructors

Constructor	Description
NullCache()

Method Summary

Modifier and Type	Method	Description
void	clear()	NO-OP
boolean	contains(K key)	NO-OP
V	get(K key)	NO-OP
static final <K extends Serializable, V> NullCache<K,V>	getInstance()
Collection<K>	getKeys()
void	put(K key, V value)	NO-OP
void	remove(K key)	NO-OP

Methods inherited from class java.lang.Object

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

Constructor Details

NullCache

public NullCache()

Method Details

getInstance

public static final <K extends Serializable,
V>
NullCache<K,V> getInstance()

Returns:

Returns a singleton that can be used in any way - all operations are stateless

contains

public boolean contains(K key)

NO-OP

Specified by:

contains in interface SimpleCache<K extends Serializable,V>

getKeys

public Collection<K> getKeys()

Specified by:

getKeys in interface SimpleCache<K extends Serializable,V>

get

public V get(K key)

NO-OP

Specified by:

get in interface SimpleCache<K extends Serializable,V>

put

public void put(K key,
 V value)

NO-OP

Specified by:

put in interface SimpleCache<K extends Serializable,V>

remove

public void remove(K key)

NO-OP

Specified by:

remove in interface SimpleCache<K extends Serializable,V>

clear

public void clear()

NO-OP

Specified by:

clear in interface SimpleCache<K extends Serializable,V>