com.google.instrumentation.trace

Class Sampler

java.lang.Object

com.google.instrumentation.trace.Sampler

public abstract class Sampler
extends Object

Sampler is used to make decisions on Span sampling.

Constructor Summary

Constructors

Constructor and Description
Sampler()

Method Summary

Modifier and Type	Method and Description
protected abstract boolean	shouldSample(SpanContext parentContext, boolean remoteParent, TraceId traceId, SpanId spanId, String name, List<Span> parentLinks) Called during Span creation to make a sampling decision.

Methods inherited from class java.lang.Object

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

Constructor Detail

Sampler

public Sampler()

Method Detail

shouldSample

protected abstract boolean shouldSample(@Nullable
                                        SpanContext parentContext,
                                        boolean remoteParent,
                                        TraceId traceId,
                                        SpanId spanId,
                                        String name,
                                        List<Span> parentLinks)

Called during Span creation to make a sampling decision.

Parameters:

parentContext - The parent Span SpanContext. May be null if this is a root span.

remoteParent - true if the parentContext is remote.

traceId - The TraceId for the new Span. This will be identical to that in the parentContext, unless this is a root span.

spanId - The span ID for the new Span.

name - The name of the new Span.

parentLinks - The parentLinks associated with the new Span.

Returns:

true if the Span is sampled.