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<?php /** * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. * http://www.gnu.org/copyleft/gpl.html * * @file */ use MediaWiki\Deferred\AutoCommitUpdate; use MediaWiki\Deferred\DeferredUpdates; use MediaWiki\MainConfigNames; use MediaWiki\MediaWikiServices; use Wikimedia\Rdbms\IDatabase; /** * Helper for a Job that writes data derived from page content to the database. * * Used by RefreshLinksJob via LinksUpdate. * * @ingroup JobQueue */ class PurgeJobUtils { /** * Invalidate the cache of a list of pages from a single namespace. * This is intended for use by subclasses. * * @param IDatabase $dbw * @param int $namespace Namespace number * @param string[] $dbkeys */ 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 ); } } } ) ); } }
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