org.springframework.integration.monitor
Class ExponentialMovingAverageRateCumulativeHistory

java.lang.Object
  org.springframework.integration.monitor.ExponentialMovingAverageRateCumulativeHistory

public class ExponentialMovingAverageRateCumulativeHistory
extends Object

Cumulative statistics for rate with higher weight given to recent data but without storing any history. Older values are given exponentially smaller weight, with a decay factor determined by a duration chosen by the client.

Author:

Dave Syer

Constructor Summary

ExponentialMovingAverageRateCumulativeHistory(double period, double lapsePeriod, int window)

Method Summary

int	getCount()
double	getMax()
double	getMean()
double	getMin()
double	getStandardDeviation()
double	getTimeSinceLastMeasurement()
void	increment()
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

ExponentialMovingAverageRateCumulativeHistory

public ExponentialMovingAverageRateCumulativeHistory(double period,
                                                     double lapsePeriod,
                                                     int window)

Parameters:

period - the period to base the rate measurement (in seconds)

lapsePeriod - the exponential lapse rate for the rate average (in seconds)

window - the exponential lapse window (number of measurements)

Method Detail

increment

public void increment()

getCount

public int getCount()

getTimeSinceLastMeasurement

public double getTimeSinceLastMeasurement()

Returns:

the time in seconds since the last measurement

getMean

public double getMean()

getStandardDeviation

public double getStandardDeviation()

getMax

public double getMax()

getMin

public double getMin()

toString

public String toString()

Overrides:

toString in class Object