maintenance/purgeParserCache.php

   1 <?php
   2 /**
   3  * Maintenance script to 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( dirname( __FILE__ ) . '/Maintenance.php' );
  26
  27 class PurgeParserCache extends Maintenance {
  28         var $lastProgress;
  29
  30         function __construct() {
  31                 parent::__construct();
  32                 $this->addDescription( "Remove old objects from the parser cache. " .
  33                         "This only works when the parser cache is in an SQL database." );
  34                 $this->addOption( 'expiredate', 'Delete objects expiring before this date.', false, true );
  35                 $this->addOption( 'age',
  36                         'Delete objects created more than this many seconds ago, assuming $wgParserCacheExpireTime '.
  37                                 'has been consistent.',
  38                         false, true );
  39         }
  40
  41         function execute() {
  42                 $inputDate = $this->getOption( 'expiredate' );
  43                 $inputAge = $this->getOption( 'age' );
  44                 if ( $inputDate !== null ) {
  45                         $date = wfTimestamp( TS_MW, strtotime( $inputDate ) );
  46                 } elseif ( $inputAge !== null ) {
  47                         global $wgParserCacheExpireTime;
  48                         $date = wfTimestamp( TS_MW, time() + $wgParserCacheExpireTime - intval( $inputAge ) );
  49                 } else {
  50                         echo "Must specify either --expiredate or --age\n";
  51                         exit( 1 );
  52                 }
  53
  54                 $english = Language::factory( 'en' );
  55                 echo "Deleting objects expiring before " . $english->timeanddate( $date ) . "\n";
  56
  57                 $pc = wfGetParserCacheStorage();
  58                 $success = $pc->deleteObjectsExpiringBefore( $date, array( $this, 'showProgress' ) );
  59                 if ( !$success ) {
  60                         echo "\nCannot purge this kind of parser cache.\n";
  61                         exit( 1 );
  62                 }
  63                 $this->showProgress( 100 );
  64                 echo "\nDone\n";
  65         }
  66
  67         function showProgress( $percent ) {
  68                 $percentString = sprintf( "%.2f", $percent );
  69                 if ( $percentString === $this->lastProgress ) {
  70                         return;
  71                 }
  72                 $this->lastProgress = $percentString;
  73
  74                 $stars = floor( $percent / 2 );
  75                 echo '[' . str_repeat( '*', $stars ), str_repeat( '.', 50 - $stars ) . '] ' .
  76                         "$percentString%\r";
  77
  78         }
  79 }
  80 $maintClass = 'PurgeParserCache';
  81 require_once( RUN_MAINTENANCE_IF_MAIN );