jodd.cache

Interface Cache<K,V>

All Known Implementing Classes:

AbstractCacheMap, FIFOCache, LFUCache, LRUCache, NoCache, TimedCache

public interface Cache<K,V>

Cache interface.

Method Summary

Methods

Modifier and Type	Method and Description
void	clear() Clears current cache.
V	get(K key) Retrieves an object from the cache.
int	getCacheSize() Returns cache size or 0 if there is no size limit.
long	getCacheTimeout() Returns default timeout or 0 if it is not set.
boolean	isEmpty() Returns true if cache is empty.
boolean	isFull() Returns true if max cache capacity has been reached only if cache is size limited.
java.util.Iterator<V>	iterator() Returns iterator over non-expired values.
int	prune() Prunes objects from cache and returns the number of removed objects.
void	put(K key, V object) Adds an object to the cache with default timeout.
void	put(K key, V object, long timeout) Adds an object to the cache with specified timeout after which it becomes expired.
void	remove(K key) Removes an object from the cache.
int	size() Returns current cache size.

Method Detail

getCacheSize

int getCacheSize()

Returns cache size or 0 if there is no size limit.

getCacheTimeout

long getCacheTimeout()

Returns default timeout or 0 if it is not set.

put

void put(K key,
       V object)

Adds an object to the cache with default timeout.

See Also:

put(Object, Object, long)

put

void put(K key,
       V object,
       long timeout)

Adds an object to the cache with specified timeout after which it becomes expired. If cache is full, prune() is invoked to make room for new object.

get

V get(K key)

Retrieves an object from the cache. Returns null if object is not longer in cache or if it is expired.

iterator

java.util.Iterator<V> iterator()

Returns iterator over non-expired values.

prune

int prune()

Prunes objects from cache and returns the number of removed objects. Used strategy depends on cache implementation.

isFull

boolean isFull()

Returns true if max cache capacity has been reached only if cache is size limited.

remove

void remove(K key)

Removes an object from the cache.

clear

void clear()

Clears current cache.

size

int size()

Returns current cache size.

isEmpty

boolean isEmpty()

Returns true if cache is empty.