*/ final class SumAggregation implements AggregationInterface { public function __construct(private readonly bool $monotonic = false) { } #[\Override] public function initialize(): SumSummary { return new SumSummary(0); } /** * @param SumSummary $summary */ #[\Override] public function record($summary, $value, AttributesInterface $attributes, ContextInterface $context, int $timestamp): void { $summary->value += $value; } /** * @param SumSummary $left * @param SumSummary $right */ #[\Override] public function merge($left, $right): SumSummary { $sum = $left->value + $right->value; return new SumSummary($sum); } /** * @param SumSummary $left * @param SumSummary $right */ #[\Override] public function diff($left, $right): SumSummary { $diff = -$left->value + $right->value; return new SumSummary($diff); } /** * @param array $summaries */ #[\Override] public function toData( array $attributes, array $summaries, array $exemplars, int $startTimestamp, int $timestamp, $temporality, ): Data\Sum { $dataPoints = []; foreach ($attributes as $key => $dataPointAttributes) { $dataPoints[] = new Data\NumberDataPoint( $summaries[$key]->value, $dataPointAttributes, $startTimestamp, $timestamp, $exemplars[$key] ?? [], ); } return new Data\Sum( $dataPoints, $temporality, $this->monotonic, ); } }