maintenance/purgeParserCache.php

   1 <?php
   2 /**
   3  * Remove old objects from the parser cache.
   4  * This only works when the parser cache is in an SQL database.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  19  * http://www.gnu.org/copyleft/gpl.html
  20  *
  21  * @file
  22  * @ingroup Maintenance
  23  */
  24
  25 require __DIR__ . '/Maintenance.php';
  26
  27 /**
  28  * Maintenance script to remove old objects from the parser cache.
  29  *
  30  * @ingroup Maintenance
  31  */
  32 class PurgeParserCache extends Maintenance {
  33         public $lastProgress;
  34
  35         function __construct() {
  36                 parent::__construct();
  37                 $this->addDescription( "Remove old objects from the parser cache. " .
  38                         "This only works when the parser cache is in an SQL database." );
  39                 $this->addOption( 'expiredate', 'Delete objects expiring before this date.', false, true );
  40                 $this->addOption(
  41                         'age',
  42                         'Delete objects created more than this many seconds ago, assuming $wgParserCacheExpireTime ' .
  43                                 'has been consistent.',
  44                         false, true );
  45         }
  46
  47         function execute() {
  48                 $inputDate = $this->getOption( 'expiredate' );
  49                 $inputAge = $this->getOption( 'age' );
  50                 if ( $inputDate !== null ) {
  51                         $date = wfTimestamp( TS_MW, strtotime( $inputDate ) );
  52                 } elseif ( $inputAge !== null ) {
  53                         global $wgParserCacheExpireTime;
  54                         $date = wfTimestamp( TS_MW, time() + $wgParserCacheExpireTime - intval( $inputAge ) );
  55                 } else {
  56                         $this->error( "Must specify either --expiredate or --age", 1 );
  57                 }
  58
  59                 $english = Language::factory( 'en' );
  60                 $this->output( "Deleting objects expiring before " . $english->timeanddate( $date ) . "\n" );
  61
  62                 $pc = wfGetParserCacheStorage();
  63                 $success = $pc->deleteObjectsExpiringBefore( $date, array( $this, 'showProgress' ) );
  64                 if ( !$success ) {
  65                         $this->error( "\nCannot purge this kind of parser cache.", 1 );
  66                 }
  67                 $this->showProgress( 100 );
  68                 $this->output( "\nDone\n" );
  69         }
  70
  71         function showProgress( $percent ) {
  72                 $percentString = sprintf( "%.2f", $percent );
  73                 if ( $percentString === $this->lastProgress ) {
  74                         return;
  75                 }
  76                 $this->lastProgress = $percentString;
  77
  78                 $stars = floor( $percent / 2 );
  79                 $this->output( '[' . str_repeat( '*', $stars ) . str_repeat( '.', 50 - $stars ) . '] ' .
  80                         "$percentString%\r" );
  81         }
  82 }
  83
  84 $maintClass = 'PurgeParserCache';
  85 require_once RUN_MAINTENANCE_IF_MAIN;