org.alfresco.repo.cache

Class MemoryCache<K extends Serializable,V>

java.lang.Object

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

All Implemented Interfaces:

SimpleCache<K,V>

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

A cache backed by a simple ConcurrentHashMap.

Note: This cache is not transaction-safe. Use it for tests or wrap it appropriately.

Since:

3.2

Author:

Derek Hulley

Constructor Summary

Constructors

Constructor and Description
MemoryCache()

Method Summary

Modifier and Type	Method and Description
void	clear()
boolean	contains(K key)
V	get(K key)
Collection<K>	getKeys()
void	put(K key, V value) Set the value to store for a given key.
void	remove(K key) Removes the cache entry whether or not the value stored against it is null.

Methods inherited from class java.lang.Object

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

Constructor Detail

MemoryCache

public MemoryCache()

Method Detail

contains

public boolean contains(K key)

Specified by:

contains in interface SimpleCache<K extends Serializable,V>

Parameters:

key - the cache key to check up on

Returns:

Returns true if there is a cache entry, regardless of whether the value itself is null

getKeys

public Collection<K> getKeys()

Specified by:

getKeys in interface SimpleCache<K extends Serializable,V>

get

public V get(K key)

Specified by:

get in interface SimpleCache<K extends Serializable,V>

Parameters:

key - K

Returns:

Returns the value associated with the key. It will be null if the value is null or if the cache doesn't have an entry.

put

public void put(K key,
                V value)

Description copied from interface: SimpleCache

Set the value to store for a given key.

Be sure to use remove if cache entries need to be removed as the cache implementations must treat a null value as a first class object in exactly the same way as a Map will allow storage and retrieval of null values.

Specified by:

put in interface SimpleCache<K extends Serializable,V>

Parameters:

key - the key against which to store the value

value - the value to store. null is allowed.

remove

public void remove(K key)

Description copied from interface: SimpleCache

Removes the cache entry whether or not the value stored against it is null.

Specified by:

remove in interface SimpleCache<K extends Serializable,V>

Parameters:

key - the key value to remove

clear

public void clear()

Specified by:

clear in interface SimpleCache<K extends Serializable,V>