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<?php
namespace Wikimedia\Telemetry;
use JsonSerializable;
/**
* Data transfer object holding data associated with a given span.
*
* @since 1.43
*/
class SpanContext implements JsonSerializable {
/**
* The ID of the trace this span is part of, as a hexadecimal string.
* @var string
*/
private string $traceId;
/**
* The ID of this span, as a hexadecimal string.
* @var string
*/
private string $spanId;
/**
* The ID of this span, as a hexadecimal string, or `null` if this is a root span.
* @var string|null
*/
private ?string $parentSpanId;
/**
* A concise description of the work represented by this span.
* @see TracerInterface::createSpan()
* @var string
*/
private string $name;
/**
* Whether the active sampler decided to sample and record this span.
* @var bool
*/
private bool $sampled;
/**
* Key-value metadata associated with this span.
* @see Span::setAttributes()
* @var array
*/
private array $attributes = [];
/**
* Describes the relationship of this span to other spans within the same trace.
* @see Span::setSpanKind()
* @var int
*/
private int $spanKind = SpanInterface::SPAN_KIND_INTERNAL;
/**
* UNIX epoch timestamp in nanoseconds at which this span was started,
* or `null` if this span was not started yet.
* @var int|null
*/
private ?int $startEpochNanos = null;
/**
* UNIX epoch timestamp in nanoseconds at which this span was ended,
* or `null` if this span was not ended yet.
* @var int|null
*/
private ?int $endEpochNanos = null;
public function __construct(
string $traceId,
string $spanId,
?string $parentSpanId,
string $name,
bool $sampled
) {
$this->traceId = $traceId;
$this->spanId = $spanId;
$this->parentSpanId = $parentSpanId;
$this->name = $name;
$this->sampled = $sampled;
}
public function setEndEpochNanos( int $endEpochNanos ): void {
$this->endEpochNanos = $endEpochNanos;
}
public function setStartEpochNanos( int $startEpochNanos ): void {
$this->startEpochNanos = $startEpochNanos;
}
public function setSpanKind( int $spanKind ): void {
$this->spanKind = $spanKind;
}
public function setAttributes( array $attributes ): void {
$this->attributes = $attributes;
}
public function isSampled(): bool {
return $this->sampled;
}
public function getSpanId(): string {
return $this->spanId;
}
public function getTraceId(): string {
return $this->traceId;
}
public function getParentSpanId(): ?string {
return $this->parentSpanId;
}
public function wasStarted(): bool {
return $this->startEpochNanos !== null;
}
public function wasEnded(): bool {
return $this->endEpochNanos !== null;
}
public function jsonSerialize(): array {
$json = [
'traceId' => $this->traceId,
'parentSpanId' => $this->parentSpanId,
'spanId' => $this->spanId,
'name' => $this->name,
'startTimeUnixNano' => $this->startEpochNanos,
'endTimeUnixNano' => $this->endEpochNanos,
'kind' => $this->spanKind
];
if ( $this->attributes ) {
$json['attributes'] = OtlpSerializer::serializeKeyValuePairs( $this->attributes );
}
return $json;
}
/**
* Check whether the given SpanContext belongs to the same span.
*
* @param SpanContext|null $other
* @return bool
*/
public function equals( ?SpanContext $other ): bool {
if ( $other === null ) {
return false;
}
return $other->spanId === $this->spanId;
}
}
|
