OpenTelemetry\Tracing\Tracer

Complexity

Total Complexity

10

Size/Duplication

Total Lines	48
Duplicated Lines	0 %

Test Coverage

Coverage

100%

Importance

Changes	3
Bugs	2	Features	0

6 Methods

Rating	Name	Duplication	Size	Complexity
A	getActiveSpan()	0	6	3
A	getSpans()	0	3	1
A	createSpan()	0	6	1
A	generateSpanInstance()	0	9	2
A	__construct()	0	4	2
A	setActive()	0	4	1

<?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) {
            $parent = $this->getActiveSpan()->getSpanContext();
        }
        $span = new Span($name, $context, $parent);
        $this->spans[] = $span;
        return $span;
    }
}