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<?php
declare(strict_types=1);
namespace OpenTelemetry\Tracing;
class Tracer
{
private $active;
private $spans = [];
private $tail = [];
public function __construct(SpanContext $context = null)
$context = $context ?: SpanContext::generate();
$this->active = $this->generateSpanInstance('tracer', $context);
}
public function getActiveSpan(): Span
while (count($this->tail) && $this->active->getEnd()) {
$this->active = array_pop($this->tail);
return $this->active;
public function setActive(Span $span): Span
$this->tail[] = $this->active;
return $this->active = $span;
public function createSpan(string $name): Span
$parent = $this->getActiveSpan()->getSpanContext();
$context = SpanContext::fork($parent->getTraceId());
$span = $this->generateSpanInstance($name, $context);
return $this->setActive($span);
public function getSpans(): array
return $this->spans;
private function generateSpanInstance($name, SpanContext $context): Span
$parent = null;
if ($this->active) {
$span = new Span($name, $context, $parent);
$this->spans[] = $span;
return $span;
basis-company /
opentelemetry-php
