net.sf.ehcache.pool.impl
Class BalancedAccessOnHeapPoolEvictor

java.lang.Object
  net.sf.ehcache.pool.impl.AbstractBalancedAccessEvictor<PoolableStore>
      net.sf.ehcache.pool.impl.BalancedAccessOnHeapPoolEvictor

All Implemented Interfaces:

PoolEvictor<PoolableStore>

public class BalancedAccessOnHeapPoolEvictor
extends AbstractBalancedAccessEvictor<PoolableStore>

Balanced access evictor that makes on-heap eviction decisions.

Author:

Chris Dennis

Constructor Summary

BalancedAccessOnHeapPoolEvictor()

Method Summary

protected long	byteSize(PoolableStore store) Return the size in bytes of the supplied store.
protected long	countSize(PoolableStore store) Return the number of mappings in the supplied store.
protected boolean	evict(PoolableStore store, int count, long size) Evict the specified number of bytes or the hinted number of elements from the specified store
protected float	hitRate(PoolableStore store) Return the hit rate for the supplied store.
protected float	missRate(PoolableStore store) Return the miss rate for the supplied store.

Methods inherited from class net.sf.ehcache.pool.impl.AbstractBalancedAccessEvictor

freeSpace

Methods inherited from class java.lang.Object

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

Constructor Detail

BalancedAccessOnHeapPoolEvictor

public BalancedAccessOnHeapPoolEvictor()

Method Detail

evict

protected boolean evict(PoolableStore store,
                        int count,
                        long size)

Evict the specified number of bytes or the hinted number of elements from the specified store

Specified by:

evict in class AbstractBalancedAccessEvictor<PoolableStore>

Parameters:

store - store to evict from

count - number of elements to evict

size - number of bytes to evict

Returns:

true if the eviction succeeded

countSize

protected long countSize(PoolableStore store)

Return the number of mappings in the supplied store.

Specified by:

countSize in class AbstractBalancedAccessEvictor<PoolableStore>

Parameters:

store - store to size

Returns:

mapping count

byteSize

protected long byteSize(PoolableStore store)

Return the size in bytes of the supplied store.

Specified by:

byteSize in class AbstractBalancedAccessEvictor<PoolableStore>

Parameters:

store - store to size

Returns:

size in bytes

hitRate

protected float hitRate(PoolableStore store)

Return the hit rate for the supplied store.

Specified by:

hitRate in class AbstractBalancedAccessEvictor<PoolableStore>

Parameters:

store - store to query

Returns:

hit rate

missRate

protected float missRate(PoolableStore store)

Return the miss rate for the supplied store.

Specified by:

missRate in class AbstractBalancedAccessEvictor<PoolableStore>

Parameters:

store - store to query

Returns:

miss rate