PurgeJobUtils.php

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<?php
use MediaWiki\Deferred\AutoCommitUpdate;
use MediaWiki\Deferred\DeferredUpdates;
use MediaWiki\MainConfigNames;
use MediaWiki\MediaWikiServices;
use Wikimedia\Rdbms\IDatabase;
 
class PurgeJobUtils {
    public static function invalidatePages( IDatabase $dbw, $namespace, array $dbkeys ) {
        if ( $dbkeys === [] ) {
            return;
        }
        $fname = __METHOD__;
 
        DeferredUpdates::addUpdate( new AutoCommitUpdate(
            $dbw,
            __METHOD__,
            static function () use ( $dbw, $namespace, $dbkeys, $fname ) {
                $services = MediaWikiServices::getInstance();
                $dbProvider = $services->getConnectionProvider();
                // 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->newSelectQueryBuilder()
                    ->select( 'page_id' )
                    ->from( 'page' )
                    ->where( [ 'page_namespace' => $namespace ] )
                    ->andWhere( [ 'page_title' => $dbkeys ] )
                    ->andWhere( $dbw->expr( 'page_touched', '<', $now ) )
                    ->caller( $fname )->fetchFieldValues();
 
                if ( !$ids ) {
                    return;
                }
 
                $batchSize =
                    $services->getMainConfig()->get( MainConfigNames::UpdateRowsPerQuery );
                $ticket = $dbProvider->getEmptyTransactionTicket( $fname );
                $idBatches = array_chunk( $ids, $batchSize );
                foreach ( $idBatches as $idBatch ) {
                    $dbw->newUpdateQueryBuilder()
                        ->update( 'page' )
                        ->set( [ 'page_touched' => $now ] )
                        ->where( [ 'page_id' => $idBatch ] )
                        ->andWhere( $dbw->expr( 'page_touched', '<', $now ) ) // handle races
                        ->caller( $fname )->execute();
                    if ( count( $idBatches ) > 1 ) {
                        $dbProvider->commitAndWaitForReplication( $fname, $ticket );
                    }
                }
            }
        ) );
    }
}