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<?php declare(strict_types=1); |
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namespace ReactInspector\Collector\Merger; |
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use ReactInspector\CollectorInterface; |
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use ReactInspector\Measurement; |
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use ReactInspector\Measurements; |
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use ReactInspector\Metric; |
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use ReactInspector\Tags; |
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use Rx\Observable; |
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use function ApiClients\Tools\Rx\observableFromArray; |
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use function ApiClients\Tools\Rx\unwrapObservableFromPromise; |
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use function array_key_exists; |
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use function array_merge; |
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use function array_values; |
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use function assert; |
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use function current; |
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use function get_class; |
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use function React\Promise\all; |
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final class CollectorMergerCollector implements CollectorInterface |
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{ |
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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> $collectors |
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*/ |
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public function __construct(CollectorInterface ...$collectors) |
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{ |
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$previousClass = get_class(current($collectors)); |
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foreach ($collectors as $collector) { |
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if (get_class($collector) !== $previousClass) { |
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throw CollectorsMustBeOfTheSameClassException::fromCollectors(...$collectors); |
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} |
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$previousClass = get_class($collector); |
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} |
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$this->collectors = $collectors; |
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} |
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public function collect(): Observable |
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{ |
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$promises = []; |
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foreach ($this->collectors as $collector) { |
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$promises[] = $collector->collect()->toArray()->toPromise(); |
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} |
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return unwrapObservableFromPromise( |
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all($promises)->then(static function (array $metricCollections): Observable { |
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$metrics = []; |
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foreach ($metricCollections as $metricCollection) { |
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foreach ($metricCollection as $metric) { |
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assert($metric instanceof Metric); |
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if (! array_key_exists($metric->config()->name(), $metrics)) { |
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$metrics[$metric->config()->name()] = Metric::create($metric->config(), new Tags(), new Measurements()); |
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} |
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$measurements = []; |
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foreach ($metric->measurements()->get() as $measurement) { |
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$measurements[] = new Measurement( |
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$measurement->value(), |
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new Tags(...array_values(array_merge($metric->tags()->get(), $measurement->tags()->get()))) |
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); |
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} |
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$metrics[$metric->config()->name()] = Metric::create( |
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$metric->config(), |
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new Tags(), |
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new Measurements(...array_merge($metrics[$metric->config()->name()]->measurements()->get(), $measurements)) |
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); |
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} |
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} |
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return observableFromArray($metrics); |
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}) |
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); |
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} |
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public function cancel(): void |
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{ |
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// void |
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} |
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} |
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