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Span.php
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Span.php
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<?php
namespace Wikimedia\Telemetry;
use Wikimedia\Assert\Assert;
/**
* Represents an OpenTelemetry span, i.e. a single operation within a trace.
*
* @since 1.43
* @see https://opentelemetry.io/docs/specs/otel/trace/api/#span
*/
class Span implements SpanInterface {
private Clock $clock;
private TracerState $tracerState;
private SpanContext $context;
public function __construct(
Clock $clock,
TracerState $tracerState,
SpanContext $context
) {
$this->clock = $clock;
$this->tracerState = $tracerState;
$this->context = $context;
}
public function __destruct() {
$this->end();
$activeSpanContext = $this->tracerState->getActiveSpanContext();
if ( $this->context->equals( $activeSpanContext ) ) {
$this->deactivate();
}
}
/** @inheritDoc */
public function getContext(): SpanContext {
return $this->context;
}
/** @inheritDoc */
public function setAttributes( array $attributes ): SpanInterface {
$this->context->setAttributes( $attributes );
return $this;
}
/** @inheritDoc */
public function setSpanKind( int $spanKind ): SpanInterface {
$this->context->setSpanKind( $spanKind );
return $this;
}
/** @inheritDoc */
public function setSpanStatus( int $status ): SpanInterface {
$this->context->setSpanStatus( $status );
return $this;
}
/** @inheritDoc */
public function start( ?int $epochNanos = null ): SpanInterface {
Assert::precondition(
!$this->context->wasStarted(),
'Cannot start a span more than once'
);
$this->context->setStartEpochNanos( $epochNanos ?? $this->clock->getCurrentNanoTime() );
return $this;
}
/** @inheritDoc */
public function end( ?int $epochNanos = null ): void {
Assert::precondition(
$this->context->wasStarted(),
'Cannot end a span that has not been started'
);
// Make duplicate end() calls a no-op, since it may occur legitimately,
// e.g. when a span wrapped in an RAII ScopedSpan wrapper is ended explicitly.
if ( !$this->context->wasEnded() ) {
$this->context->setEndEpochNanos( $epochNanos ?? $this->clock->getCurrentNanoTime() );
$this->tracerState->addSpanContext( $this->context );
}
}
/** @inheritDoc */
public function activate(): SpanInterface {
$this->tracerState->activateSpan( $this->getContext() );
return $this;
}
/** @inheritDoc */
public function deactivate(): SpanInterface {
$this->tracerState->deactivateSpan( $this->getContext() );
return $this;
}
}

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text/x-php
Expires
Sat, May 16, 21:03 (1 d, 16 h)
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local-disk
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Storage Handle
55/85/6ad8befca3263809b21e9a6d662f
Default Alt Text
Span.php (2 KB)

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