com.j_spaces.javax.cache

Interface EvictionStrategy

All Known Implementing Classes:

AbstractEvictionStrategy, FIFOEvictionStrategy, LFUEvictionStrategy, LRUEvictionStrategy, NoneEvictionStrategy, SizeEvictionStrategy

Deprecated.

@Deprecated
public interface EvictionStrategy

EvictionStrategy decides which entry to evict when the cache reaches its limits. The eviction strategy acts as a CacheEntry factory, this way if the cache has a new element inserted then the eviction strategy would be informed of such an operation and can keep track of the state of the cache. In order to keep track of the entries use the cache informs the eviction strategy on each use ("touch") of a CacheEntry.

Since:

5.0

Version:

1.0

Author:

Guy Korland

Method Summary

Modifier and Type	Method and Description
void	clear() Deprecated. Clear EvictionStrategy internal structures only and doesn't clear cache.
CacheEntry	createEntry(Object key, Object value, long ttl, int version) Deprecated. Creates new CacheEntry for the Cache and probably saves the entry in the internal structures.
void	discardEntry(CacheEntry entry) Deprecated. Discard an Entry from the EvictionStrategy internal structures.
int	evict(Cache cache) Deprecated. Evicts batch of CacheEntry from the Cache according to the eviction strategy.
void	touchEntry(CacheEntry entry) Deprecated. Informs the eviction strategy on a CacheEntry use.

Method Detail

clear

void clear()

Deprecated.

Clear EvictionStrategy internal structures only and doesn't clear cache.

createEntry

CacheEntry createEntry(Object key,
                       Object value,
                       long ttl,
                       int version)

Deprecated.

Creates new CacheEntry for the Cache and probably saves the entry in the internal structures.

Parameters:

key - the entry key

value - the entry value

ttl - the time to keep the entry in cache

version - the entry version

Returns:

a CacheEntry that holds all the parameters and probably saved in the eviction strategy internal structures

discardEntry

void discardEntry(CacheEntry entry)

Deprecated.

Discard an Entry from the EvictionStrategy internal structures.

Parameters:

entry - the entry to discard from the eviction strategy internal structures

evict

int evict(Cache cache)

Deprecated.

Evicts batch of CacheEntry from the Cache according to the eviction strategy.

Parameters:

cache - the cache to be evicted

Returns:

the amount of entries evicted

touchEntry

void touchEntry(CacheEntry entry)

Deprecated.

Informs the eviction strategy on a CacheEntry use.

Parameters:

entry - the touched entry