net.eduvax.util

Interface CacheStrategy<K>

All Known Implementing Classes:

Cache.LFU, Cache.LRU, Cache.Rand

public interface CacheStrategy<K>

Chache management strategy. Defines the policy to use to choose the element to remove from the cache when cache is full and a new element enters the cache. To be able to make its choice, le strategy must be aware of all insertion, deletion of object in the cache. It must also be notified for each access in the cache. removed(), used() and added() are the callback to be defined for this purpose.

Method Summary

Methods

Modifier and Type	Method and Description
void	added(K key) telle strategy a key has been added.
void	removed(K key) tell strategy a key has been removed.
K	select() Selection key to be remove from host cache.
void	used(K key) tell strategy a key has been used.

Method Detail

select

K select()

Selection key to be remove from host cache.

Returns:

key selected, null when cache is empty.

removed

void removed(K key)

tell strategy a key has been removed.

Parameters:

key - used key

used

void used(K key)

tell strategy a key has been used.

Parameters:

key - used key

added

void added(K key)

telle strategy a key has been added. In most cases, strategy implementation of added(key) is the same than uses(key).