function ParentBased::shouldSample

Invokes the respective delegate sampler when parent is set or uses root sampler for the root span.

Overrides SamplerInterface::shouldSample

File

vendor/open-telemetry/sdk/Trace/Sampler/ParentBased.php, line 63

Class

ParentBased

This implementation of the SamplerInterface that respects parent context's sampling decision and delegates for the root span. Example: ``` use OpenTelemetry\API\Trace\ParentBased; use OpenTelemetry\API\Trace\AlwaysOnSampler

Namespace

OpenTelemetry\SDK\Trace\Sampler

Code

public function shouldSample(ContextInterface $parentContext, string $traceId, string $spanName, int $spanKind, AttributesInterface $attributes, array $links) : SamplingResult {
    $parentSpan = Span::fromContext($parentContext);
    $parentSpanContext = $parentSpan->getContext();
    // Invalid parent SpanContext indicates root span is being created
    if (!$parentSpanContext->isValid()) {
        return $this->root
            ->shouldSample(...func_get_args());
    }
    if ($parentSpanContext->isRemote()) {
        return $parentSpanContext->isSampled() ? $this->remoteParentSampler
            ->shouldSample(...func_get_args()) : $this->remoteParentNotSampler
            ->shouldSample(...func_get_args());
    }
    return $parentSpanContext->isSampled() ? $this->localParentSampler
        ->shouldSample(...func_get_args()) : $this->localParentNotSampler
        ->shouldSample(...func_get_args());
}