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<?php |
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/** |
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* Base code for update jobs that put some secondary data extracted |
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* from article content into the database. |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License along |
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* with this program; if not, write to the Free Software Foundation, Inc., |
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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* http://www.gnu.org/copyleft/gpl.html |
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* |
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* @file |
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*/ |
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class PurgeJobUtils { |
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/** |
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* Invalidate the cache of a list of pages from a single namespace. |
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* This is intended for use by subclasses. |
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* |
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* @param IDatabase $dbw |
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* @param int $namespace Namespace number |
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* @param array $dbkeys |
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*/ |
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public static function invalidatePages( IDatabase $dbw, $namespace, array $dbkeys ) { |
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if ( $dbkeys === [] ) { |
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return; |
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} |
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$dbw->onTransactionPreCommitOrIdle( function() use ( $dbw, $namespace, $dbkeys ) { |
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// Determine which pages need to be updated. |
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// This is necessary to prevent the job queue from smashing the DB with |
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// large numbers of concurrent invalidations of the same page. |
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$now = $dbw->timestamp(); |
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$ids = $dbw->selectFieldValues( |
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'page', |
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'page_id', |
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[ |
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'page_namespace' => $namespace, |
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'page_title' => $dbkeys, |
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'page_touched < ' . $dbw->addQuotes( $now ) |
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], |
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__METHOD__ |
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); |
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if ( $ids === [] ) { |
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return; |
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} |
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// Do the update. |
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// We still need the page_touched condition, in case the row has changed since |
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// the non-locking select above. |
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$dbw->update( |
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'page', |
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[ 'page_touched' => $now ], |
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[ |
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'page_id' => $ids, |
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'page_touched < ' . $dbw->addQuotes( $now ) |
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], |
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__METHOD__ |
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); |
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} ); |
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} |
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} |
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wikimedia /
mediawiki
