org.apache.jackrabbit.oak.cache

Class EmpiricalWeigher

java.lang.Object

org.apache.jackrabbit.oak.cache.EmpiricalWeigher

All Implemented Interfaces:

Weigher<CacheValue,CacheValue>

public class EmpiricalWeigher
extends Object
implements Weigher<CacheValue,CacheValue>

Determines the weight of object based on the memory taken by them. The memory estimates are based on empirical data and not exact

Constructor Summary

Constructors

Constructor and Description
EmpiricalWeigher()

Method Summary

Modifier and Type	Method and Description
int	weigh(CacheValue key, CacheValue value) Returns the weight of a cache entry.

Methods inherited from class java.lang.Object

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

Constructor Detail

EmpiricalWeigher

public EmpiricalWeigher()

Method Detail

weigh

public int weigh(CacheValue key,
                 CacheValue value)

Description copied from interface: Weigher

Returns the weight of a cache entry. There is no unit for entry weights; rather they are simply relative to each other.

Specified by:

weigh in interface Weigher<CacheValue,CacheValue>

Returns:

the weight of the entry; must be non-negative