class StreamMetricSource

final class StreamMetricSource implements MetricSourceInterface {
    public function __construct(StreamMetricSourceProvider $provider, int $reader) {
    }
    public function collectionTimestamp() : int {
        return $this->provider->stream
            ->timestamp();
    }
    public function collect() : Metric {
        return new Metric($this->provider->instrumentationLibrary, $this->provider->resource, $this->provider->view->name, $this->provider->view->unit, $this->provider->view->description, $this->provider->stream
            ->collect($this->reader));
    }
    public function __destruct() {
        $this->provider->stream
            ->unregister($this->reader);
    }

}