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<?php
declare(strict_types=1);
namespace Sentry\Tracing;
use Sentry\EventId;
/**
* This class stores all the information about a Span.
*/
class Span
{
/**
* @var SpanId Span ID
*/
protected $spanId;
/**
* @var TraceId Trace ID
*/
protected $traceId;
/**
* @var string|null Description of the Span
*/
protected $description;
/**
* @var string|null Operation of the Span
*/
protected $op;
/**
* @var SpanStatus|null Completion status of the Span
*/
protected $status;
/**
* @var SpanId|null ID of the parent Span
*/
protected $parentSpanId;
/**
* @var bool|null Has the sample decision been made?
*/
protected $sampled;
/**
* @var array<string, string> A List of tags associated to this Span
*/
protected $tags = [];
/**
* @var array<string, mixed> An arbitrary mapping of additional metadata
*/
protected $data = [];
/**
* @var float Timestamp in seconds (epoch time) indicating when the span started
*/
protected $startTimestamp;
/**
* @var float|null Timestamp in seconds (epoch time) indicating when the span ended
*/
protected $endTimestamp;
/**
* @var SpanRecorder|null Reference instance to the SpanRecorder
*/
protected $spanRecorder;
/**
* Constructor.
*
* @param SpanContext|null $context The context to create the span with
*
* @internal
*/
public function __construct(?SpanContext $context = null)
{
$this->traceId = TraceId::generate();
$this->spanId = SpanId::generate();
$this->startTimestamp = microtime(true);
if (null === $context) {
return;
}
if (null !== $context->getTraceId()) {
$this->traceId = $context->getTraceId();
}
if (null !== $context->getSpanId()) {
$this->spanId = $context->getSpanId();
}
if (null !== $context->getStartTimestamp()) {
$this->startTimestamp = $context->getStartTimestamp();
}
$this->parentSpanId = $context->getParentSpanId();
$this->description = $context->getDescription();
$this->op = $context->getOp();
$this->status = $context->getStatus();
$this->sampled = $context->getSampled();
$this->tags = $context->getTags();
$this->data = $context->getData();
$this->endTimestamp = $context->getEndTimestamp();
}
/**
* Sets the ID of the span.
*
* @param SpanId $spanId The ID
*/
public function setSpanId(SpanId $spanId): void
{
$this->spanId = $spanId;
}
/**
* Gets the ID that determines which trace the span belongs to.
*/
public function getTraceId(): TraceId
{
return $this->traceId;
}
/**
* Sets the ID that determines which trace the span belongs to.
*
* @param TraceId $traceId The ID
*/
public function setTraceId(TraceId $traceId): void
{
$this->traceId = $traceId;
}
/**
* Gets the ID that determines which span is the parent of the current one.
*/
public function getParentSpanId(): ?SpanId
{
return $this->parentSpanId;
}
/**
* Sets the ID that determines which span is the parent of the current one.
*
* @param SpanId|null $parentSpanId The ID
*/
public function setParentSpanId(?SpanId $parentSpanId): void
{
$this->parentSpanId = $parentSpanId;
}
/**
* Gets the timestamp representing when the measuring started.
*/
public function getStartTimestamp(): float
{
return $this->startTimestamp;
}
/**
* Sets the timestamp representing when the measuring started.
*
* @param float $startTimestamp The timestamp
*/
public function setStartTimestamp(float $startTimestamp): void
{
$this->startTimestamp = $startTimestamp;
}
/**
* Gets the timestamp representing when the measuring finished.
*/
public function getEndTimestamp(): ?float
{
return $this->endTimestamp;
}
/**
* Gets a description of the span's operation, which uniquely identifies
* the span but is consistent across instances of the span.
*/
public function getDescription(): ?string
{
return $this->description;
}
/**
* Sets a description of the span's operation, which uniquely identifies
* the span but is consistent across instances of the span.
*
* @param string|null $description The description
*/
public function setDescription(?string $description): void
{
$this->description = $description;
}
/**
* Gets a short code identifying the type of operation the span is measuring.
*/
public function getOp(): ?string
{
return $this->op;
}
/**
* Sets a short code identifying the type of operation the span is measuring.
*
* @param string|null $op The short code
*/
public function setOp(?string $op): void
{
$this->op = $op;
}
/**
* Gets the status of the span/transaction.
*/
public function getStatus(): ?SpanStatus
{
return $this->status;
}
/**
* Sets the status of the span/transaction.
*
* @param SpanStatus|null $status The status
*/
public function setStatus(?SpanStatus $status): void
{
$this->status = $status;
}
/**
* Sets the HTTP status code and the status of the span/transaction.
*
* @param int $statusCode The HTTP status code
*/
public function setHttpStatus(int $statusCode): void
{
$this->tags['http.status_code'] = (string) $statusCode;
$status = SpanStatus::createFromHttpStatusCode($statusCode);
if ($status !== SpanStatus::unknownError()) {
$this->status = $status;
}
}
/**
* Gets a map of tags for this event.
*
* @return array<string, string>
*/
public function getTags(): array
{
return $this->tags;
}
/**
* Sets a map of tags for this event.
*
* @param array<string, string> $tags The tags
*/
public function setTags(array $tags): void
{
$this->tags = array_merge($this->tags, $tags);
}
/**
* Gets the ID of the span.
*/
public function getSpanId(): SpanId
{
return $this->spanId;
}
/**
* Gets the flag determining whether this span should be sampled or not.
*/
public function getSampled(): ?bool
{
return $this->sampled;
}
/**
* Sets the flag determining whether this span should be sampled or not.
*
* @param bool $sampled Whether to sample or not this span
*/
public function setSampled(?bool $sampled): void
{
$this->sampled = $sampled;
}
/**
* Gets a map of arbitrary data.
*
* @return array<string, mixed>
*/
public function getData(): array
{
return $this->data;
}
/**
* Sets a map of arbitrary data. This method will merge the given data with
* the existing one.
*
* @param array<string, mixed> $data The data
*/
public function setData(array $data): void
{
$this->data = array_merge($this->data, $data);
}
/**
* Gets the data in a format suitable for storage in the "trace" context.
*
* @return array<string, mixed>
*
* @psalm-return array{
* data?: array<string, mixed>,
* description?: string,
* op?: string,
* parent_span_id?: string,
* span_id: string,
* status?: string,
* tags?: array<string, string>,
* trace_id: string
* }
*/
public function getTraceContext(): array
{
$result = [
'span_id' => (string) $this->spanId,
'trace_id' => (string) $this->traceId,
];
if (null !== $this->parentSpanId) {
$result['parent_span_id'] = (string) $this->parentSpanId;
}
if (null !== $this->description) {
$result['description'] = $this->description;
}
if (null !== $this->op) {
$result['op'] = $this->op;
}
if (null !== $this->status) {
$result['status'] = (string) $this->status;
}
if (!empty($this->data)) {
$result['data'] = $this->data;
}
if (!empty($this->tags)) {
$result['tags'] = $this->tags;
}
return $result;
}
/**
* Sets the finish timestamp on the current span.
*
* @param float|null $endTimestamp Takes an endTimestamp if the end should not be the time when you call this function
*
* @return EventId|null Finish for a span always returns null
*/
public function finish(?float $endTimestamp = null): ?EventId
{
$this->endTimestamp = $endTimestamp ?? microtime(true);
return null;
}
/**
* Creates a new {@see Span} while setting the current ID as `parentSpanId`.
* Also the `sampled` decision will be inherited.
*
* @param SpanContext $context The context of the child span
*/
public function startChild(SpanContext $context): self
{
$context = clone $context;
$context->setSampled($this->sampled);
$context->setParentSpanId($this->spanId);
$context->setTraceId($this->traceId);
$span = new self($context);
$span->spanRecorder = $this->spanRecorder;
if (null != $span->spanRecorder) {
$span->spanRecorder->add($span);
}
return $span;
}
/**
* Gets the span recorder attached to this span.
*
* @internal
*/
public function getSpanRecorder(): ?SpanRecorder
{
return $this->spanRecorder;
}
/**
* Detaches the span recorder from this instance.
*/
public function detachSpanRecorder(): void
{
$this->spanRecorder = null;
}
/**
* Returns a string that can be used for the `sentry-trace` header.
*/
public function toTraceparent(): string
{
$sampled = '';
if (null !== $this->sampled) {
$sampled = $this->sampled ? '-1' : '-0';
}
return sprintf('%s-%s%s', (string) $this->traceId, (string) $this->spanId, $sampled);
}
}