net.sf.ehcache.pool.impl
Class AbstractFromLargestCachePoolEvictor

java.lang.Object
  net.sf.ehcache.pool.impl.AbstractFromLargestCachePoolEvictor

All Implemented Interfaces:

PoolEvictor<PoolableStore>

Direct Known Subclasses:

FromLargestCacheOnDiskPoolEvictor, FromLargestCacheOnHeapPoolEvictor

public abstract class AbstractFromLargestCachePoolEvictor
extends Object
implements PoolEvictor<PoolableStore>

Abstract pool evictor which always evicts from the store consuming the most resources.

Author:

Ludovic Orban

Constructor Summary

AbstractFromLargestCachePoolEvictor()

Method Summary

protected abstract boolean	evict(int count, long bytes, PoolableStore poolableStore) Evict from a store for a chosen resource
boolean	freeSpace(Collection<PoolableStore> from, long bytes) Free at least N bytes from a collection of resources
protected abstract long	getSizeInBytes(PoolableStore poolableStore) Get a store size in bytes for a chosen resource

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractFromLargestCachePoolEvictor

public AbstractFromLargestCachePoolEvictor()

Method Detail

freeSpace

public boolean freeSpace(Collection<PoolableStore> from,
                         long bytes)

Free at least N bytes from a collection of resources

Specified by:

freeSpace in interface PoolEvictor<PoolableStore>

Parameters:

from - a collection of resources to free from

bytes - the number of bytes to free up

Returns:

true if at least N bytes could be freed

evict

protected abstract boolean evict(int count,
                                 long bytes,
                                 PoolableStore poolableStore)

Evict from a store for a chosen resource

Parameters:

count - the element count

bytes - the bytes count

poolableStore - the store

Returns:

true if eviction succeeded, ie: if there was enough evictable resource held by the store

getSizeInBytes

protected abstract long getSizeInBytes(PoolableStore poolableStore)

Get a store size in bytes for a chosen resource

Parameters:

poolableStore - the store

Returns:

the size in bytes