Class WeakIdentityConcurrentMap<K,V>

java.lang.Object

org.ehcache.sizeof.util.WeakIdentityConcurrentMap<K,V>

Type Parameters:

K - The key type

V - The value type

public final class WeakIdentityConcurrentMap<K,V>
extends Object

A poor man's implementation of a WeakIdentityConcurrentMap to hold the CacheManager associated ExecutorServices

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	WeakIdentityConcurrentMap.CleanUpTask<T>
private static final class	WeakIdentityConcurrentMap.IdentityWeakReference<T>

Field Summary

Fields

Modifier and Type	Field	Description
private final WeakIdentityConcurrentMap.CleanUpTask<V>	cleanUpTask
private final ConcurrentMap<WeakReference<K>, V>	map
private final ReferenceQueue<K>	queue

Constructor Summary

Constructors

Constructor	Description
WeakIdentityConcurrentMap()	Constructor
WeakIdentityConcurrentMap(WeakIdentityConcurrentMap.CleanUpTask<V> cleanUpTask)	Constructor

Method Summary

Modifier and Type	Method	Description
void	cleanUp()
boolean	containsKey(K key)
V	get(K key)
Set<K>	keySet()
V	put(K key, V value)	Puts into the underlying
V	putIfAbsent(K key, V value)	Puts into the underlying
V	remove(K key)	Remove from the underlying
String	toString()

Methods inherited from class Object

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

Field Details

map

private final ConcurrentMap<WeakReference<K>, V> map

queue

private final ReferenceQueue<K> queue

cleanUpTask

private final WeakIdentityConcurrentMap.CleanUpTask<V> cleanUpTask

Constructor Details

WeakIdentityConcurrentMap

public WeakIdentityConcurrentMap()

Constructor

WeakIdentityConcurrentMap

public WeakIdentityConcurrentMap(WeakIdentityConcurrentMap.CleanUpTask<V> cleanUpTask)

Constructor

Parameters:

cleanUpTask - task cleaning up references

Method Details

put

public V put(K key,
 V value)

Puts into the underlying

Parameters:

key - key with which the specified value is to be associated

value - value to be associated with the specified key

Returns:

the previous value associated with key, or null if there was no mapping for key. (A null return can also indicate that the map previously associated null with key, if the implementation supports null values.)

remove

public V remove(K key)

Remove from the underlying

Parameters:

key - key whose mapping is to be removed from the map

Returns:

the previous value associated with key, or null if there was no mapping for key.

toString

public String toString()

Overrides:

toString in class Object

putIfAbsent

public V putIfAbsent(K key,
 V value)

Puts into the underlying

Parameters:

key - key with which the specified value is to be associated

value - value to be associated with the specified key

Returns:

the previous value associated with the specified key, or null if there was no mapping for the key. (A null return can also indicate that the map previously associated null with the key, if the implementation supports null values.)

get

public V get(K key)

Parameters:

key - the key whose associated value is to be returned

Returns:

the value to which the specified key is mapped, or null if this map contains no mapping for the key

cleanUp

public void cleanUp()

keySet

public Set<K> keySet()

Returns:

a set view of the keys contained in this map

containsKey

public boolean containsKey(K key)