com.github.benmanes.caffeine.cache.simulator.admission.countmin4

Class IncrementalResetCountMin4

java.lang.Object

com.github.benmanes.caffeine.cache.simulator.admission.countmin4.IncrementalResetCountMin4

All Implemented Interfaces:

Frequency

public final class IncrementalResetCountMin4
extends Object

A sketch where the aging process is an incremental reset.

Constructor Summary

Constructors

Constructor and Description
IncrementalResetCountMin4(com.typesafe.config.Config config)

Method Summary

Modifier and Type	Method and Description
void	ensureCapacity(long maximumSize) Increases the capacity of this FrequencySketch instance, if necessary, to ensure that it can accurately estimate the popularity of elements given the maximum size of the cache.
int	frequency(long e) Returns the estimated number of occurrences of an element, up to the maximum (15).
void	increment(long e) Increments the popularity of the element if it does not exceed the maximum (15).

Methods inherited from class java.lang.Object

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

Constructor Detail

IncrementalResetCountMin4

public IncrementalResetCountMin4(com.typesafe.config.Config config)

Method Detail

ensureCapacity

public void ensureCapacity(@Nonnegative
                           long maximumSize)

Increases the capacity of this FrequencySketch instance, if necessary, to ensure that it can accurately estimate the popularity of elements given the maximum size of the cache.

Parameters:

maximumSize - the maximum size of the cache

frequency

@Nonnegative
public int frequency(long e)

Returns the estimated number of occurrences of an element, up to the maximum (15).

Specified by:

frequency in interface Frequency

Parameters:

e - the element to count occurrences of

Returns:

the estimated number of occurrences of the element; possibly zero but never negative

increment

public void increment(long e)

Increments the popularity of the element if it does not exceed the maximum (15). The popularity of all elements will be periodically down sampled when the observed events exceeds a threshold. This process provides a frequency aging to allow expired long term entries to fade away.

Specified by:

increment in interface Frequency

Parameters:

e - the element to add