com.wavefront.sdk.entities.tracing.sampling

Class ConstantSampler

java.lang.Object

com.wavefront.sdk.entities.tracing.sampling.ConstantSampler

All Implemented Interfaces:

Sampler

public class ConstantSampler
extends java.lang.Object
implements Sampler

Sampler that allows spans through at a constant rate (all in or all out).

Version:

$Id: $Id

Author:

Vikram Raman (vikram@wavefront.com)

Constructor Summary

Constructors

Constructor and Description
ConstantSampler(boolean decision) Constructor for ConstantSampler.

Method Summary

Modifier and Type	Method and Description
boolean	isEarly() Whether this sampler performs early or head based sampling.
boolean	sample(java.lang.String operationName, long traceId, long duration) Gets whether a span should be allowed given it's operation and trace id.
void	setDecision(boolean decision) Sets the decision for this sampler.

Methods inherited from class java.lang.Object

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

Constructor Detail

ConstantSampler

public ConstantSampler(boolean decision)

Constructor for ConstantSampler.

Parameters:

decision - a boolean

Method Detail

sample

public boolean sample(java.lang.String operationName,
                      long traceId,
                      long duration)

Gets whether a span should be allowed given it's operation and trace id.

Specified by:

sample in interface Sampler

Parameters:

operationName - The operation name of the span

traceId - The traceId of the span

duration - The duration of the span in milliseconds

Returns:

true if the span should be allowed, false otherwise

isEarly

public boolean isEarly()

Whether this sampler performs early or head based sampling. Offers a non-binding hint for clients using the sampler.

Specified by:

isEarly in interface Sampler

Returns:

true for early sampling, false otherwise

setDecision

public void setDecision(boolean decision)

Sets the decision for this sampler.

Parameters:

decision - the sampling decision