Class SlidingWindowReservoir

java.lang.Object

com.codahale.metrics.SlidingWindowReservoir

All Implemented Interfaces:

Reservoir

public class SlidingWindowReservoir
extends Object
implements Reservoir

A Reservoir implementation backed by a sliding window that stores the last N measurements.

Field Summary

Fields

Modifier and Type	Field	Description
private long	count
private final long[]	measurements

Constructor Summary

Constructors

Constructor	Description
SlidingWindowReservoir(int size)	Creates a new SlidingWindowReservoir which stores the last size measurements.

Method Summary

Modifier and Type	Method	Description
Snapshot	getSnapshot()	Returns a snapshot of the reservoir's values.
int	size()	Returns the number of values recorded.
void	update(long value)	Adds a new recorded value to the reservoir.

Methods inherited from class Object

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

Field Details

measurements

private final long[] measurements

count

private long count

Constructor Details

SlidingWindowReservoir

public SlidingWindowReservoir(int size)

Creates a new SlidingWindowReservoir which stores the last size measurements.

Parameters:

size - the number of measurements to store

Method Details

size

public int size()

Description copied from interface: Reservoir

Returns the number of values recorded.

Specified by:

size in interface Reservoir

Returns:

the number of values recorded

update

public void update(long value)

Description copied from interface: Reservoir

Adds a new recorded value to the reservoir.

Specified by:

update in interface Reservoir

Parameters:

value - a new recorded value

getSnapshot

public Snapshot getSnapshot()

Description copied from interface: Reservoir

Returns a snapshot of the reservoir's values.

Specified by:

getSnapshot in interface Reservoir

Returns:

a snapshot of the reservoir's values