PurgeJobUtils.php

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<?php
use MediaWiki\MediaWikiServices;

class PurgeJobUtils {
    public static function invalidatePages( IDatabase $dbw, $namespace, array $dbkeys ) {
        if ( $dbkeys === [] ) {
            return;
        }

        $dbw->onTransactionIdle(
            function () use ( $dbw, $namespace, $dbkeys ) {
                $services = MediaWikiServices::getInstance();
                $lbFactory = $services->getDBLoadBalancerFactory();
                // Determine which pages need to be updated.
                // This is necessary to prevent the job queue from smashing the DB with
                // large numbers of concurrent invalidations of the same page.
                $now = $dbw->timestamp();
                $ids = $dbw->selectFieldValues(
                    'page',
                    'page_id',
                    [
                        'page_namespace' => $namespace,
                        'page_title' => $dbkeys,
                        'page_touched < ' . $dbw->addQuotes( $now )
                    ],
                    __METHOD__
                );

                if ( !$ids ) {
                    return;
                }

                $batchSize = $services->getMainConfig()->get( 'UpdateRowsPerQuery' );
                $ticket = $lbFactory->getEmptyTransactionTicket( __METHOD__ );
                foreach ( array_chunk( $ids, $batchSize ) as $idBatch ) {
                    $dbw->update(
                        'page',
                        [ 'page_touched' => $now ],
                        [
                            'page_id' => $idBatch,
                            'page_touched < ' . $dbw->addQuotes( $now ) // handle races
                        ],
                        __METHOD__
                    );
                    $lbFactory->commitAndWaitForReplication( __METHOD__, $ticket );
                }
            },
            __METHOD__
        );
    }
}