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<?php
/**
* Delete image information from the object cache.
*
* Usage example:
* php deleteImageMemcached.php --until "2005-09-05 00:00:00" --sleep 0
*
* 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
* @ingroup Maintenance
*/
require_once __DIR__ . '/Maintenance.php';
/**
* Maintenance script that deletes image information from the object cache.
*
* @ingroup Maintenance
*/
class DeleteImageCache extends Maintenance {
public function __construct() {
parent::__construct();
$this->mDescription = "Delete image information from the cache";
$this->addOption( 'sleep', 'How many seconds to sleep between deletions', true, true );
$this->addOption( 'until', 'Timestamp to delete all entries prior to', true, true );
}
public function execute() {
global $wgMemc;
$until = preg_replace( "/[^\d]/", '', $this->getOption( 'until' ) );
$sleep = (int)$this->getOption( 'sleep' ) * 1000; // milliseconds
ini_set( 'display_errors', false );
$dbr = wfGetDB( DB_SLAVE );
$res = $dbr->select( 'image',
array( 'img_name' ),
array( "img_timestamp < {$until}" ),
__METHOD__
);
$i = 0;
$total = $this->getImageCount();
foreach ( $res as $row ) {
if ( $i % $this->report == 0 ) {
$this->output( sprintf( "%s: %13s done (%s)\n", wfWikiID(), "$i/$total", wfPercent( $i / $total * 100 ) ) );
}
$md5 = md5( $row->img_name );
$wgMemc->delete( wfMemcKey( 'Image', $md5 ) );
if ( $sleep != 0 ) {
usleep( $sleep );
}
++$i;
}
}
private function getImageCount() {
$dbr = wfGetDB( DB_SLAVE );
return $dbr->selectField( 'image', 'COUNT(*)', array(), __METHOD__ );
}
}
$maintClass = "DeleteImageCache";
require_once RUN_MAINTENANCE_IF_MAIN;
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