com.github.benmanes.caffeine.cache.simulator.policy.adaptive

Class CarPolicy

java.lang.Object

com.github.benmanes.caffeine.cache.simulator.policy.adaptive.CarPolicy

All Implemented Interfaces:

Policy, Policy.KeyOnlyPolicy

public final class CarPolicy
extends Object
implements Policy.KeyOnlyPolicy

Clock with Adaptive Replacement policy. This algorithm differs from ARC by replacing the LRU policy with the Clock (Second Chance) policy. This allows cache hits to be performed concurrently at the cost of a global lock on a miss and a worst case O(2n) eviction as the queues are scanned.

This implementation is based on the pseudo code provided by the authors in their paper CAR: Clock with Adaptive Replacement and is further described in their paper,

This algorithm is patented by IBM (6996676, 7096321, 7058766, 8612689).

Nested Class Summary

Nested classes/interfaces inherited from interface com.github.benmanes.caffeine.cache.simulator.policy.Policy

Policy.Characteristic, Policy.KeyOnlyPolicy, Policy.PolicySpec

Constructor Summary

Constructors

Constructor and Description
CarPolicy(Config config)

Method Summary

Modifier and Type	Method and Description
void	finished() Indicates that the recording has completed.
void	record(long key)
PolicyStats	stats() Returns the cache efficiency statistics.

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.github.benmanes.caffeine.cache.simulator.policy.Policy.KeyOnlyPolicy

record

Methods inherited from interface com.github.benmanes.caffeine.cache.simulator.policy.Policy

name

Constructor Detail

CarPolicy

public CarPolicy(Config config)

Method Detail

record

public void record(long key)

Specified by:

record in interface Policy.KeyOnlyPolicy

stats

public PolicyStats stats()

Description copied from interface: Policy

Returns the cache efficiency statistics.

Specified by:

stats in interface Policy

finished

public void finished()

Description copied from interface: Policy

Indicates that the recording has completed.

Specified by:

finished in interface Policy