Package com.codahale.metrics

Class Snapshot

java.lang.Object

com.codahale.metrics.Snapshot

Direct Known Subclasses:

UniformSnapshot, WeightedSnapshot

public abstract class Snapshot
extends Object

A statistical snapshot of a Snapshot.

Constructor Summary

Constructors

Constructor	Description
Snapshot()

Method Summary

Modifier and Type	Method	Description
abstract void	dump(OutputStream output)	Writes the values of the snapshot to the given stream.
double	get75thPercentile()	Returns the value at the 75th percentile in the distribution.
double	get95thPercentile()	Returns the value at the 95th percentile in the distribution.
double	get98thPercentile()	Returns the value at the 98th percentile in the distribution.
double	get999thPercentile()	Returns the value at the 99.9th percentile in the distribution.
double	get99thPercentile()	Returns the value at the 99th percentile in the distribution.
abstract long	getMax()	Returns the highest value in the snapshot.
abstract double	getMean()	Returns the arithmetic mean of the values in the snapshot.
double	getMedian()	Returns the median value in the distribution.
abstract long	getMin()	Returns the lowest value in the snapshot.
abstract double	getStdDev()	Returns the standard deviation of the values in the snapshot.
abstract double	getValue(double quantile)	Returns the value at the given quantile.
abstract long[]	getValues()	Returns the entire set of values in the snapshot.
abstract int	size()	Returns the number of values in the snapshot.

Methods inherited from class java.lang.Object

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

Constructor Detail

Snapshot

public Snapshot()

Method Detail

getValue

public abstract double getValue(double quantile)

Returns the value at the given quantile.

Parameters:

quantile - a given quantile, in [0..1]

Returns:

the value in the distribution at quantile

getValues

public abstract long[] getValues()

Returns the entire set of values in the snapshot.

Returns:

the entire set of values

size

public abstract int size()

Returns the number of values in the snapshot.

Returns:

the number of values

getMedian

public double getMedian()

Returns the median value in the distribution.

Returns:

the median value

get75thPercentile

public double get75thPercentile()

Returns the value at the 75th percentile in the distribution.

Returns:

the value at the 75th percentile

get95thPercentile

public double get95thPercentile()

Returns the value at the 95th percentile in the distribution.

Returns:

the value at the 95th percentile

get98thPercentile

public double get98thPercentile()

Returns the value at the 98th percentile in the distribution.

Returns:

the value at the 98th percentile

get99thPercentile

public double get99thPercentile()

Returns the value at the 99th percentile in the distribution.

Returns:

the value at the 99th percentile

get999thPercentile

public double get999thPercentile()

Returns the value at the 99.9th percentile in the distribution.

Returns:

the value at the 99.9th percentile

getMax

public abstract long getMax()

Returns the highest value in the snapshot.

Returns:

the highest value

getMean

public abstract double getMean()

Returns the arithmetic mean of the values in the snapshot.

Returns:

the arithmetic mean

getMin

public abstract long getMin()

Returns the lowest value in the snapshot.

Returns:

the lowest value

getStdDev

public abstract double getStdDev()

Returns the standard deviation of the values in the snapshot.

Returns:

the standard value

dump

public abstract void dump(OutputStream output)

Writes the values of the snapshot to the given stream.

Parameters:

output - an output stream