Class ConcurrentSoftHashMap<K,V>

java.lang.Object

java.util.AbstractMap<K,V>

org.apfloat.internal.ConcurrentSoftHashMap<K,V>

All Implemented Interfaces:

ConcurrentMap<K,V>, Map<K,V>

class ConcurrentSoftHashMap<K,V>
extends AbstractMap<K,V>
implements ConcurrentMap<K,V>

ConcurrentHashMap with softly referenced values. The maximum map size is assumed to be limited so no effort is made to expunge entries for stale values.

Values are not properly compared for equality so the only actual concurrent method implemented is putIfAbsent().

Since:

1.7.0

Version:

1.9.0

Nested Class Summary

Nested classes/interfaces inherited from class AbstractMap

AbstractMap.SimpleEntry<K,V>, AbstractMap.SimpleImmutableEntry<K,V>

Nested classes/interfaces inherited from interface Map

Map.Entry<K,V>

Field Summary

Fields

Modifier and Type	Field	Description
private ConcurrentHashMap<K, SoftReference<V>>	map

Constructor Summary

Constructors

Constructor	Description
ConcurrentSoftHashMap()

Method Summary

Modifier and Type	Method	Description
void	clear()
Set<Map.Entry<K,V>>	entrySet()
V	get(Object key)
V	put(K key, V value)
V	putIfAbsent(K key, V value)
V	remove(Object key)
boolean	remove(Object key, Object value)
V	replace(K key, V value)
boolean	replace(K key, V oldValue, V newValue)
int	size()
private V	unwrap(SoftReference<V> value)
private SoftReference<V>	wrap(V value)

Methods inherited from class AbstractMap

clone, containsKey, containsValue, equals, hashCode, isEmpty, keySet, putAll, toString, values

Methods inherited from class Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface ConcurrentMap

compute, computeIfAbsent, computeIfPresent, forEach, getOrDefault, merge, replaceAll

Methods inherited from interface Map

containsKey, containsValue, equals, hashCode, isEmpty, keySet, putAll, values

Field Details

map

private ConcurrentHashMap<K, SoftReference<V>> map

Constructor Details

ConcurrentSoftHashMap

public ConcurrentSoftHashMap()

Method Details

clear

public void clear()

Specified by:

clear in interface Map<K,V>

Overrides:

clear in class AbstractMap<K,V>

entrySet

public Set<Map.Entry<K,V>> entrySet()

Specified by:

entrySet in interface Map<K,V>

Specified by:

entrySet in class AbstractMap<K,V>

get

public V get(Object key)

Specified by:

get in interface Map<K,V>

Overrides:

get in class AbstractMap<K,V>

put

public V put(K key,
 V value)

Specified by:

put in interface Map<K,V>

Overrides:

put in class AbstractMap<K,V>

putIfAbsent

public V putIfAbsent(K key,
 V value)

Specified by:

putIfAbsent in interface ConcurrentMap<K,V>

Specified by:

putIfAbsent in interface Map<K,V>

remove

public V remove(Object key)

Specified by:

remove in interface Map<K,V>

Overrides:

remove in class AbstractMap<K,V>

remove

public boolean remove(Object key,
 Object value)

Specified by:

remove in interface ConcurrentMap<K,V>

Specified by:

remove in interface Map<K,V>

replace

public V replace(K key,
 V value)

Specified by:

replace in interface ConcurrentMap<K,V>

Specified by:

replace in interface Map<K,V>

replace

public boolean replace(K key,
 V oldValue,
 V newValue)

Specified by:

replace in interface ConcurrentMap<K,V>

Specified by:

replace in interface Map<K,V>

size

public int size()

Specified by:

size in interface Map<K,V>

Overrides:

size in class AbstractMap<K,V>

wrap

private SoftReference<V> wrap(V value)

unwrap

private V unwrap(SoftReference<V> value)