AlwaysOnSampler.php

<?php

declare (strict_types=1);
namespace OpenTelemetry\SDK\Trace\Sampler;

use OpenTelemetry\Context\ContextInterface;
use OpenTelemetry\SDK\Common\Attribute\AttributesInterface;
use OpenTelemetry\SDK\Trace\SamplerInterface;
use OpenTelemetry\SDK\Trace\SamplingResult;
use OpenTelemetry\SDK\Trace\Span;

/**
 * This implementation of the SamplerInterface always records.
 * Example:
 * ```
 * use OpenTelemetry\Sdk\Trace\AlwaysOnSampler;
 * $sampler = new AlwaysOnSampler();
 * ```
 */
class AlwaysOnSampler implements SamplerInterface {
    
    /**
     * Returns true because we always want to sample.
     * {@inheritdoc}
     */
    public function shouldSample(ContextInterface $parentContext, string $traceId, string $spanName, int $spanKind, AttributesInterface $attributes, array $links) : SamplingResult {
        $parentSpan = Span::fromContext($parentContext);
        $parentSpanContext = $parentSpan->getContext();
        $traceState = $parentSpanContext->getTraceState();
        return new SamplingResult(SamplingResult::RECORD_AND_SAMPLE, [], $traceState);
    }
    public function getDescription() : string {
        return 'AlwaysOnSampler';
    }

}