BatchSizeCalculator.php

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<?php
namespace Magento\Catalog\Model\ResourceModel\Product\Indexer\Eav;

use Magento\Framework\DB\Adapter\AdapterInterface;
use Magento\Framework\Exception\NoSuchEntityException;

class BatchSizeCalculator
{
    private $batchSizes;

    private $batchSizeManagers;

    public function __construct(
        array $batchSizes,
        array $batchSizeManagers
    ) {
        $this->batchSizes = $batchSizes;
        $this->batchSizeManagers = $batchSizeManagers;
    }

    public function estimateBatchSize(
        AdapterInterface $connection,
        $indexerTypeId
    ) {
        if (!isset($this->batchSizes[$indexerTypeId])) {
            throw NoSuchEntityException::singleField('indexTypeId', $indexerTypeId);
        }
        $this->batchSizeManagers[$indexerTypeId]->ensureBatchSize($connection, $this->batchSizes[$indexerTypeId]);

        return $this->batchSizes[$indexerTypeId];
    }
}