Package io.dropwizard.metrics5

Class LockFreeExponentiallyDecayingReservoir.Builder

java.lang.Object

io.dropwizard.metrics5.LockFreeExponentiallyDecayingReservoir.Builder

Enclosing class:

LockFreeExponentiallyDecayingReservoir

public static final class LockFreeExponentiallyDecayingReservoir.Builder
extends Object

By default this uses a size of 1028 elements, which offers a 99.9% confidence level with a 5% margin of error assuming a normal distribution, and an alpha factor of 0.015, which heavily biases the reservoir to the past 5 minutes of measurements.

Method Summary

Modifier and Type	Method	Description
LockFreeExponentiallyDecayingReservoir.Builder	alpha(double value)	Alpha is the exponential decay factor.
Reservoir	build()
LockFreeExponentiallyDecayingReservoir.Builder	clock(Clock value)	Clock instance used for decay.
LockFreeExponentiallyDecayingReservoir.Builder	rescaleThreshold(Duration value)	Interval at which this reservoir is rescaled.
LockFreeExponentiallyDecayingReservoir.Builder	size(int value)	Maximum number of samples to keep in the reservoir.

Methods inherited from class java.lang.Object

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

Method Details

size

public LockFreeExponentiallyDecayingReservoir.Builder size(int value)

Maximum number of samples to keep in the reservoir. Once this number is reached older samples are replaced (based on weight, with some amount of random jitter).

alpha

public LockFreeExponentiallyDecayingReservoir.Builder alpha(double value)

Alpha is the exponential decay factor. Higher values bias results more heavily toward newer values.

rescaleThreshold

public LockFreeExponentiallyDecayingReservoir.Builder rescaleThreshold(Duration value)

Interval at which this reservoir is rescaled.

clock

public LockFreeExponentiallyDecayingReservoir.Builder clock(Clock value)

Clock instance used for decay.

build

public Reservoir build()