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<?php declare(strict_types=1); |
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namespace ReactInspector; |
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use React\EventLoop\LoopInterface; |
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use React\EventLoop\TimerInterface; |
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use Rx\DisposableInterface; |
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use Rx\Observable; |
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use Rx\ObserverInterface; |
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use Rx\Subject\Subject; |
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use function ApiClients\Tools\Rx\observableFromArray; |
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final class Metrics extends Subject implements MetricsStreamInterface |
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{ |
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private LoopInterface $loop; |
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private float $interval; |
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private ?TimerInterface $timer = null; |
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/** @var array<int, CollectorInterface> */ |
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private array $collectors = []; |
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/** |
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* @param array<int, CollectorInterface> $collectors |
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*/ |
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public function __construct(LoopInterface $loop, float $interval, CollectorInterface ...$collectors) |
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{ |
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$this->loop = $loop; |
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$this->interval = $interval; |
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$this->collectors = $collectors; |
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} |
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public function removeObserver(ObserverInterface $observer): bool |
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{ |
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$return = parent::removeObserver($observer); |
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if (! $this->hasObservers()) { |
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if ($this->timer instanceof TimerInterface) { |
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$this->loop->cancelTimer($this->timer); |
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$this->timer = null; |
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} |
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foreach ($this->collectors as $index => $instance) { |
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$instance->cancel(); |
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} |
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$this->collectors = []; |
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} |
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return $return; |
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} |
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protected function _subscribe(ObserverInterface $observer): DisposableInterface |
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{ |
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if ($this->timer === null) { |
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$collect = function (): void { |
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observableFromArray($this->collectors)->flatMap(static function (CollectorInterface $collector): Observable { |
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return $collector->collect(); |
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})->subscribe(function (Metric $metric): void { |
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$this->onNext($metric); |
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}); |
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}; |
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$this->timer = $this->loop->addPeriodicTimer($this->interval, $collect); |
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$collect(); |
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} |
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return parent::_subscribe($observer); |
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} |
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} |
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reactphp-inspector /
metrics
