41 lines
1.2 KiB
PHP
41 lines
1.2 KiB
PHP
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<?php
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declare(strict_types=1);
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namespace OpenTelemetry\SDK\Metrics\View;
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use Generator;
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use OpenTelemetry\SDK\Common\Instrumentation\InstrumentationScopeInterface;
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use OpenTelemetry\SDK\Metrics\Instrument;
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use OpenTelemetry\SDK\Metrics\ViewRegistryInterface;
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final class CriteriaViewRegistry implements ViewRegistryInterface
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{
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/** @var list<SelectionCriteriaInterface> */
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private array $criteria = [];
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/** @var list<ViewTemplate> */
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private array $views = [];
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public function register(SelectionCriteriaInterface $criteria, ViewTemplate $view): void
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{
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$this->criteria[] = $criteria;
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$this->views[] = $view;
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}
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public function find(Instrument $instrument, InstrumentationScopeInterface $instrumentationScope): ?iterable
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{
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$views = $this->generateViews($instrument, $instrumentationScope);
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return $views->valid() ? $views : null;
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}
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private function generateViews(Instrument $instrument, InstrumentationScopeInterface $instrumentationScope): Generator
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{
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foreach ($this->criteria as $i => $criteria) {
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if ($criteria->accepts($instrument, $instrumentationScope)) {
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yield $this->views[$i]->project($instrument);
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}
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}
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}
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}
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