io.zipkin

Class Sampler.ProbabilisticSampler

java.lang.Object

io.zipkin.Sampler

io.zipkin.Sampler.ProbabilisticSampler

Enclosing class:

Sampler

public static final class Sampler.ProbabilisticSampler
extends Sampler

Accepts a percentage of trace ids by comparing their absolute value against a boundary. eg iSampled == abs(traceId) < boundary

While idempotent, this implementation's sample rate won't exactly match the input rate because trace ids are not perfectly distributed across 64bits. For example, tests have shown an error rate of 3% when trace ids are random.

Nested Class Summary

Nested classes/interfaces inherited from class io.zipkin.Sampler

Sampler.ProbabilisticSampler

Constructor Summary

Constructors

Constructor and Description
ProbabilisticSampler(float rate)

Method Summary

Modifier and Type	Method and Description
boolean	isSampled(long traceId) Returns true if the trace ID should be recorded.
String	toString()

Methods inherited from class io.zipkin.Sampler

create

Methods inherited from class java.lang.Object

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

Constructor Detail

ProbabilisticSampler

public ProbabilisticSampler(float rate)

Method Detail

isSampled

public boolean isSampled(long traceId)

Description copied from class: Sampler

Returns true if the trace ID should be recorded.

Specified by:

isSampled in class Sampler

toString

public String toString()

Overrides:

toString in class Object