function SpanBuilder::startSpan

@inheritDoc

File

vendor/open-telemetry/sdk/Trace/SpanBuilder.php, line 115

Class

SpanBuilder

Namespace

OpenTelemetry\SDK\Trace

Code

public function startSpan() : API\SpanInterface {
    $parentContext = Context::resolve($this->parentContext);
    $parentSpan = Span::fromContext($parentContext);
    $parentSpanContext = $parentSpan->getContext();
    $spanId = $this->tracerSharedState
        ->getIdGenerator()
        ->generateSpanId();
    if (!$parentSpanContext->isValid()) {
        $traceId = $this->tracerSharedState
            ->getIdGenerator()
            ->generateTraceId();
    }
    else {
        $traceId = $parentSpanContext->getTraceId();
    }
    $samplingResult = $this->tracerSharedState
        ->getSampler()
        ->shouldSample($parentContext, $traceId, $this->spanName, $this->spanKind, $this->attributesBuilder
        ->build(), $this->links);
    $samplingDecision = $samplingResult->getDecision();
    $samplingResultTraceState = $samplingResult->getTraceState();
    $spanContext = API\SpanContext::create($traceId, $spanId, SamplingResult::RECORD_AND_SAMPLE === $samplingDecision ? API\TraceFlags::SAMPLED : API\TraceFlags::DEFAULT, $samplingResultTraceState);
    if (!in_array($samplingDecision, [
        SamplingResult::RECORD_AND_SAMPLE,
        SamplingResult::RECORD_ONLY,
    ], true)) {
        return Span::wrap($spanContext);
    }
    $attributesBuilder = clone $this->attributesBuilder;
    foreach ($samplingResult->getAttributes() as $key => $value) {
        $attributesBuilder[$key] = $value;
    }
    return Span::startSpan($this->spanName, $spanContext, $this->instrumentationScope, $this->spanKind, $parentSpan, $parentContext, $this->tracerSharedState
        ->getSpanLimits(), $this->tracerSharedState
        ->getSpanProcessor(), $this->tracerSharedState
        ->getResource(), $attributesBuilder, $this->links, $this->totalNumberOfLinksAdded, $this->startEpochNanos);
}