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<?php
declare(strict_types=1);
namespace OpenTelemetry\Context\Propagation;
use OpenTelemetry\Context\Context;
use OpenTelemetry\Context\ContextInterface;
final class NoopTextMapPropagator implements TextMapPropagatorInterface
{
private static ?self $instance = null;
public static function getInstance(): self
{
if (null === self::$instance) {
self::$instance = new self();
}
return self::$instance;
}
public function fields(): array
{
return [];
}
public function extract($carrier, PropagationGetterInterface $getter = null, ContextInterface $context = null): ContextInterface
{
return $context ?? Context::getCurrent();
}
public function inject(&$carrier, PropagationSetterInterface $setter = null, ContextInterface $context = null): void
{
}
}
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