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 use MediaWiki\MediaWikiServices;
  28
  29 /**
  30  * Maintenance script to remove old objects from the parser cache.
  31  *
  32  * @ingroup Maintenance
  33  */
  34 class PurgeParserCache extends Maintenance {
  35         public $lastProgress;
  36
  37         private $usleep = 0;
  38
  39         function __construct() {
  40                 parent::__construct();
  41                 $this->addDescription( "Remove old objects from the parser cache. " .
  42                         "This only works when the parser cache is in an SQL database." );
  43                 $this->addOption( 'expiredate', 'Delete objects expiring before this date.', false, true );
  44                 $this->addOption(
  45                         'age',
  46                         'Delete objects created more than this many seconds ago, assuming ' .
  47                                 '$wgParserCacheExpireTime has remained consistent.',
  48                         false,
  49                         true );
  50                 $this->addOption( 'msleep', 'Milliseconds to sleep between purge chunks', false, true );
  51         }
  52
  53         function execute() {
  54                 global $wgParserCacheExpireTime;
  55
  56                 $inputDate = $this->getOption( 'expiredate' );
  57                 $inputAge = $this->getOption( 'age' );
  58                 if ( $inputDate !== null ) {
  59                         $date = wfTimestamp( TS_MW, strtotime( $inputDate ) );
  60                 } elseif ( $inputAge !== null ) {
  61                         $date = wfTimestamp( TS_MW, time() + $wgParserCacheExpireTime - intval( $inputAge ) );
  62                 } else {
  63                         $this->error( "Must specify either --expiredate or --age", 1 );
  64                         return;
  65                 }
  66                 $this->usleep = 1e3 * $this->getOption( 'msleep', 0 );
  67
  68                 $english = Language::factory( 'en' );
  69                 $this->output( "Deleting objects expiring before " .
  70                         $english->timeanddate( $date ) . "\n" );
  71
  72                 $pc = MediaWikiServices::getInstance()->getParserCache()->getCacheStorage();
  73                 $success = $pc->deleteObjectsExpiringBefore( $date, [ $this, 'showProgressAndWait' ] );
  74                 if ( !$success ) {
  75                         $this->error( "\nCannot purge this kind of parser cache.", 1 );
  76                 }
  77                 $this->showProgressAndWait( 100 );
  78                 $this->output( "\nDone\n" );
  79         }
  80
  81         public function showProgressAndWait( $percent ) {
  82                 usleep( $this->usleep ); // avoid lag; T150124
  83
  84                 $percentString = sprintf( "%.2f", $percent );
  85                 if ( $percentString === $this->lastProgress ) {
  86                         return;
  87                 }
  88                 $this->lastProgress = $percentString;
  89
  90                 $stars = floor( $percent / 2 );
  91                 $this->output( '[' . str_repeat( '*', $stars ) . str_repeat( '.', 50 - $stars ) . '] ' .
  92                         "$percentString%\r" );
  93         }
  94 }
  95
  96 $maintClass = 'PurgeParserCache';
  97 require_once RUN_MAINTENANCE_IF_MAIN;