org.springframework.integration.monitor
Class ExponentialMovingAverageRatioCumulativeHistory

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

public class ExponentialMovingAverageRatioCumulativeHistory
extends Object

Cumulative statistics for success rate (ratio) 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

ExponentialMovingAverageRatioCumulativeHistory(double lapsePeriod, int window)

Method Summary

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

Methods inherited from class java.lang.Object

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

Constructor Detail

ExponentialMovingAverageRatioCumulativeHistory

public ExponentialMovingAverageRatioCumulativeHistory(double lapsePeriod,
                                                      int window)

Parameters:

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

window - the exponential lapse window (number of measurements)

Method Detail

success

public void success()

failure

public void failure()

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