72 lines
2.1 KiB
PHP
72 lines
2.1 KiB
PHP
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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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