Package com.aspectran.utils.cache

Class ConcurrentReferenceCache<K,V>

java.lang.Object

com.aspectran.utils.cache.ConcurrentReferenceCache<K,V>

Type Parameters:

K - the type of the key used for caching

V - the type of the cached values

All Implemented Interfaces:

Cache<K,V>

public class ConcurrentReferenceCache<K,V>
extends Object
implements Cache<K,V>

A Cache that uses soft or weak references for both keys and values.

Since:

6.6.7

Constructor Summary

Constructors

Constructor	Description
ConcurrentReferenceCache(ConcurrentReferenceHashMap.ReferenceType referenceType, Function<K,V> generator)
ConcurrentReferenceCache(Function<K,V> generator)

Method Summary

Modifier and Type	Method	Description
void	clear()	Removes all of the elements from this cache.
V	get(K key)	Gets an entry from the cache.
boolean	isEmpty()	Returns true if this cache contains no key-value mappings.
Set<K>	keySet()	Returns a Set view of the keys contained in this cache.
void	remove(K key)	Removes the specified element from this cache if it is present.
int	size()	Returns the number of elements in this cache.

Methods inherited from class java.lang.Object

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

Constructor Details

ConcurrentReferenceCache

public ConcurrentReferenceCache(Function<K,V> generator)

ConcurrentReferenceCache

public ConcurrentReferenceCache(ConcurrentReferenceHashMap.ReferenceType referenceType,
 Function<K,V> generator)

Method Details

get

public V get(K key)

Description copied from interface: Cache

Gets an entry from the cache.

Specified by:

get in interface Cache<K,V>

Parameters:

key - the key whose associated value is to be returned

Returns:

the element, or null, if it does not exist

remove

public void remove(K key)

Description copied from interface: Cache

Removes the specified element from this cache if it is present.

Specified by:

remove in interface Cache<K,V>

Parameters:

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

clear

public void clear()

Description copied from interface: Cache

Removes all of the elements from this cache.

Specified by:

clear in interface Cache<K,V>

keySet

public Set<K> keySet()

Description copied from interface: Cache

Returns a Set view of the keys contained in this cache.

Specified by:

keySet in interface Cache<K,V>

Returns:

the set view

size

public int size()

Description copied from interface: Cache

Returns the number of elements in this cache.

Specified by:

size in interface Cache<K,V>

Returns:

the number of elements in this cache

isEmpty

public boolean isEmpty()

Description copied from interface: Cache

Returns true if this cache contains no key-value mappings.

Specified by:

isEmpty in interface Cache<K,V>

Returns:

true if this cache contains no key-value mappings