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| 1 | <?php |
| 2 | /** |
| 3 | * This program is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License as published by |
| 5 | * the Free Software Foundation; either version 2 of the License, or |
| 6 | * (at your option) any later version. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License along |
| 14 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 15 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 16 | * http://www.gnu.org/copyleft/gpl.html |
| 17 | * |
| 18 | * @file |
| 19 | */ |
| 20 | use MediaWiki\Deferred\AutoCommitUpdate; |
| 21 | use MediaWiki\Deferred\DeferredUpdates; |
| 22 | use MediaWiki\MainConfigNames; |
| 23 | use MediaWiki\MediaWikiServices; |
| 24 | use Wikimedia\Rdbms\IDatabase; |
| 25 | |
| 26 | /** |
| 27 | * Helper for a Job that writes data derived from page content to the database. |
| 28 | * |
| 29 | * Used by RefreshLinksJob via LinksUpdate. |
| 30 | * |
| 31 | * @ingroup JobQueue |
| 32 | */ |
| 33 | class PurgeJobUtils { |
| 34 | /** |
| 35 | * Invalidate the cache of a list of pages from a single namespace. |
| 36 | * This is intended for use by subclasses. |
| 37 | * |
| 38 | * @param IDatabase $dbw |
| 39 | * @param int $namespace Namespace number |
| 40 | * @param string[] $dbkeys |
| 41 | */ |
| 42 | public static function invalidatePages( IDatabase $dbw, $namespace, array $dbkeys ) { |
| 43 | if ( $dbkeys === [] ) { |
| 44 | return; |
| 45 | } |
| 46 | $fname = __METHOD__; |
| 47 | |
| 48 | DeferredUpdates::addUpdate( new AutoCommitUpdate( |
| 49 | $dbw, |
| 50 | __METHOD__, |
| 51 | static function () use ( $dbw, $namespace, $dbkeys, $fname ) { |
| 52 | $services = MediaWikiServices::getInstance(); |
| 53 | $dbProvider = $services->getConnectionProvider(); |
| 54 | // Determine which pages need to be updated. |
| 55 | // This is necessary to prevent the job queue from smashing the DB with |
| 56 | // large numbers of concurrent invalidations of the same page. |
| 57 | $now = $dbw->timestamp(); |
| 58 | $ids = $dbw->newSelectQueryBuilder() |
| 59 | ->select( 'page_id' ) |
| 60 | ->from( 'page' ) |
| 61 | ->where( [ 'page_namespace' => $namespace ] ) |
| 62 | ->andWhere( [ 'page_title' => $dbkeys ] ) |
| 63 | ->andWhere( $dbw->expr( 'page_touched', '<', $now ) ) |
| 64 | ->caller( $fname )->fetchFieldValues(); |
| 65 | |
| 66 | if ( !$ids ) { |
| 67 | return; |
| 68 | } |
| 69 | |
| 70 | $batchSize = |
| 71 | $services->getMainConfig()->get( MainConfigNames::UpdateRowsPerQuery ); |
| 72 | $ticket = $dbProvider->getEmptyTransactionTicket( $fname ); |
| 73 | $idBatches = array_chunk( $ids, $batchSize ); |
| 74 | foreach ( $idBatches as $idBatch ) { |
| 75 | $dbw->newUpdateQueryBuilder() |
| 76 | ->update( 'page' ) |
| 77 | ->set( [ 'page_touched' => $now ] ) |
| 78 | ->where( [ 'page_id' => $idBatch ] ) |
| 79 | ->andWhere( $dbw->expr( 'page_touched', '<', $now ) ) // handle races |
| 80 | ->caller( $fname )->execute(); |
| 81 | if ( count( $idBatches ) > 1 ) { |
| 82 | $dbProvider->commitAndWaitForReplication( $fname, $ticket ); |
| 83 | } |
| 84 | } |
| 85 | } |
| 86 | ) ); |
| 87 | } |
| 88 | } |