1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
|
<?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 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(): void {
$this->tracerState->activateSpan( $this->getContext() );
}
/** @inheritDoc */
public function deactivate(): void {
$this->tracerState->deactivateSpan( $this->getContext() );
}
}
|
