com.gigaspaces.internal.utils.collections

Class ConcurrentSoftCache<Key,Value>

java.lang.Object

com.gigaspaces.internal.utils.collections.ConcurrentSoftCache<Key,Value>

All Implemented Interfaces:

Map<Key,Value>

Deprecated.

Since 10.1.0 - use ConcurrentBoundedSoftCache instead

@Deprecated
public class ConcurrentSoftCache<Key,Value>
extends Object
implements Map<Key,Value>

Soft reference concurrent cache. It uses a ConcurrentHashMap and a soft reference for the values. An entry in a ConcurrentSoftCache will be removed on JVM memory shortage. A double-reference is used to store the values, so that the finalize() method can be used to remove the entry from cache when it is collected by the garbage collector. Note The entry will be removed even if there is a hard reference to it somewhere, since the double-reference is used.

Since:

5.1

Version:

1.0

Author:

anna

Nested Class Summary

Nested classes/interfaces inherited from interface java.util.Map

Map.Entry<K,V>

Field Summary

Fields

Modifier and Type	Field and Description
protected ConcurrentHashMap<Key,SoftReference<com.gigaspaces.internal.utils.collections.ConcurrentSoftCache.DoubleRef<Key,Value>>>	_map Deprecated.

Constructor Summary

Constructors

Constructor and Description
ConcurrentSoftCache() Deprecated. Default constructor.

Method Summary

Modifier and Type	Method and Description
void	clear() Deprecated.
boolean	containsKey(Object key) Deprecated.
boolean	containsValue(Object value) Deprecated.
Set<Map.Entry<Key,Value>>	entrySet() Deprecated.
Value	get(Object key) Deprecated. Returns the value to which the specified key is mapped in this table.
boolean	isEmpty() Deprecated.
Set<Key>	keySet() Deprecated.
Value	put(Key key, Value value) Deprecated.
void	putAll(Map<? extends Key,? extends Value> t) Deprecated.
Value	remove(Object key) Deprecated.
int	size() Deprecated.
Collection<Value>	values() Deprecated.

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Map

compute, computeIfAbsent, computeIfPresent, equals, forEach, getOrDefault, hashCode, merge, putIfAbsent, remove, replace, replace, replaceAll

Field Detail

_map

protected final ConcurrentHashMap<Key,SoftReference<com.gigaspaces.internal.utils.collections.ConcurrentSoftCache.DoubleRef<Key,Value>>> _map

Deprecated.

Constructor Detail

ConcurrentSoftCache

public ConcurrentSoftCache()

Deprecated.

Default constructor. Constructs a new empty cache.

Method Detail

put

public Value put(Key key,
                 Value value)

Deprecated.

Specified by:

put in interface Map<Key,Value>

get

public Value get(Object key)

Deprecated.

Returns the value to which the specified key is mapped in this table.

Specified by:

get in interface Map<Key,Value>

Parameters:

key - a key in the table.

Returns:

the value to which the key is mapped in this table; null if the key is not mapped to any value in this table or it was already garbage collected.

Throws:

NullPointerException - if the key is null.

remove

public Value remove(Object key)

Deprecated.

Specified by:

remove in interface Map<Key,Value>

containsKey

public boolean containsKey(Object key)

Deprecated.

Specified by:

containsKey in interface Map<Key,Value>

isEmpty

public boolean isEmpty()

Deprecated.

Specified by:

isEmpty in interface Map<Key,Value>

keySet

public Set<Key> keySet()

Deprecated.

Specified by:

keySet in interface Map<Key,Value>

size

public int size()

Deprecated.

Specified by:

size in interface Map<Key,Value>

clear

public void clear()

Deprecated.

Specified by:

clear in interface Map<Key,Value>

containsValue

public boolean containsValue(Object value)

Deprecated.

Specified by:

containsValue in interface Map<Key,Value>

entrySet

public Set<Map.Entry<Key,Value>> entrySet()

Deprecated.

Specified by:

entrySet in interface Map<Key,Value>

putAll

public void putAll(Map<? extends Key,? extends Value> t)

Deprecated.

Specified by:

putAll in interface Map<Key,Value>

values

public Collection<Value> values()

Deprecated.

Specified by:

values in interface Map<Key,Value>