org.jboss.weld.util.cache

Interface ComputingCache<K,V>

public interface ComputingCache<K,V>

A simple abstraction for computing cache.

Implementations are not required to support recursive computations. A cache client must be aware that such computations may result in livelocks, infinite loops and other undesired situations.

Author:

Martin Kouba

Method Summary

Modifier and Type	Method and Description
void	clear() Remove all cache entries.
Iterable<V>	getAllPresentValues()
<T> T	getCastValue(Object key)
V	getValue(K key)
V	getValueIfPresent(K key)
void	invalidate(Object key) Invalidate the entry with the given key.
long	size()

Method Detail

getValue

V getValue(K key)

Parameters:

key -

Returns:

the cache value

getCastValue

<T> T getCastValue(Object key)

Parameters:

key -

Returns:

the cache value cast to the required type

getValueIfPresent

V getValueIfPresent(K key)

Parameters:

key -

Returns:

the cache value if present (i.e. no computation is performed)

size

long size()

Returns:

the size of the cache

clear

void clear()

Remove all cache entries.

invalidate

void invalidate(Object key)

Invalidate the entry with the given key. No-op if no such entry exists.

Parameters:

key -

getAllPresentValues

Iterable<V> getAllPresentValues()

Returns:

an immutable iterable of values