MeterFacade
.
Built-in metrics will be removed in a future release.@Deprecated public class ExponentialMovingAverageRate extends Object
increment()
when a new event occurs, and then use convenience methods (e.g. getMean()
)
to retrieve estimates of the rate of event arrivals and the statistics of the series. Older values are given
exponentially smaller weight, with a decay factor determined by a duration chosen by the client. The rate measurement
weights decay in two dimensions:
weight = exp((t0-t)/T)
where t0
is the
last measurement time, t
is the current time and T
is the lapse period)weight = exp(-i/L)
where L
is
the lapse window and i
is the sequence number of the measurement.window * 5
samples are retained meaning that the earliest retained value contributes just 0.5% to the
sum.Constructor and Description |
---|
ExponentialMovingAverageRate(double period,
double lapsePeriod,
int window)
Deprecated.
|
ExponentialMovingAverageRate(double period,
double lapsePeriod,
int window,
boolean millis)
Deprecated.
|
Modifier and Type | Method and Description |
---|---|
int |
getCount()
Deprecated.
|
long |
getCountLong()
Deprecated.
|
double |
getMax()
Deprecated.
|
double |
getMean()
Deprecated.
|
double |
getMin()
Deprecated.
|
double |
getStandardDeviation()
Deprecated.
|
Statistics |
getStatistics()
Deprecated.
|
double |
getTimeSinceLastMeasurement()
Deprecated.
|
void |
increment()
Deprecated.
Add a new event to the series.
|
void |
increment(long t)
Deprecated.
Add a new event to the series at time t.
|
void |
reset()
Deprecated.
|
String |
toString()
Deprecated.
|
public ExponentialMovingAverageRate(double period, double lapsePeriod, int window)
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)public ExponentialMovingAverageRate(double period, double lapsePeriod, int window, boolean millis)
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)millis
- when true, analyze the data as milliseconds instead of the native nanosecondspublic void reset()
public void increment()
public void increment(long t)
t
- a new event to the series (System.nanoTime()).public int getCount()
public long getCountLong()
public double getTimeSinceLastMeasurement()
public double getMean()
public double getStandardDeviation()
public double getMax()
public double getMin()
public Statistics getStatistics()