com.github.benmanes.caffeine.cache.simulator.policy.sketch.climbing

Interface HillClimber

All Known Implementing Classes:

AbstractClimber, Adam, AmsGrad, IndicatorClimber, MiniSimClimber, Nadam, SimpleClimber, SimulatedAnnealingClimber, Stochastic

public interface HillClimber

A hill climbing algorithm to tune the admission window size.

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	HillClimber.Adaptation The adaptation type and its magnitude.
static class	HillClimber.QueueType

Method Summary

Modifier and Type	Method and Description
HillClimber.Adaptation	adapt(double windowSize, double probationSize, double protectedSize, boolean isFull) Determines how to adapt the segment sizes.
void	onHit(long key, HillClimber.QueueType queue, boolean isFull) Records that a hit occurred with a full cache.
void	onMiss(long key, boolean isFull) Records that a miss occurred with a full cache.

Method Detail

onHit

void onHit(long key,
           HillClimber.QueueType queue,
           boolean isFull)

Records that a hit occurred with a full cache.

Parameters:

key - the key accessed

queue - the queue the entry was found in

isFull - if the cache is fully populated

onMiss

void onMiss(long key,
            boolean isFull)

Records that a miss occurred with a full cache.

Parameters:

key - the key accessed

isFull - if the cache is fully populated and had to evict

adapt

HillClimber.Adaptation adapt(double windowSize,
                             double probationSize,
                             double protectedSize,
                             boolean isFull)

Determines how to adapt the segment sizes.

Parameters:

windowSize - the current window size

probationSize - the current probation size

protectedSize - the current protected size

isFull - if the cache is fully populated

Returns:

the adjustment to the segments