includes/deferred/HTMLCacheUpdate.php

   1 <?php
   2 /**
   3  * HTML cache invalidation of all pages linking to a given title.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup Cache
  22  */
  23
  24 /**
  25  * Class to invalidate the HTML cache of all the pages linking to a given title.
  26  *
  27  * @ingroup Cache
  28  */
  29 class HTMLCacheUpdate implements DeferrableUpdate {
  30         /** @var Title */
  31         public $mTitle;
  32
  33         /** @var string */
  34         public $mTable;
  35
  36         /**
  37          * @param Title $titleTo
  38          * @param string $table
  39          */
  40         function __construct( Title $titleTo, $table ) {
  41                 $this->mTitle = $titleTo;
  42                 $this->mTable = $table;
  43         }
  44
  45         public function doUpdate() {
  46                 wfProfileIn( __METHOD__ );
  47
  48                 $job = new HTMLCacheUpdateJob(
  49                         $this->mTitle,
  50                         array(
  51                                 'table' => $this->mTable,
  52                         ) + Job::newRootJobParams( // "overall" refresh links job info
  53                                 "htmlCacheUpdate:{$this->mTable}:{$this->mTitle->getPrefixedText()}"
  54                         )
  55                 );
  56
  57                 $count = $this->mTitle->getBacklinkCache()->getNumLinks( $this->mTable, 100 );
  58                 if ( $count >= 100 ) { // many backlinks
  59                         JobQueueGroup::singleton()->push( $job );
  60                         JobQueueGroup::singleton()->deduplicateRootJob( $job );
  61                 } else { // few backlinks ($count might be off even if 0)
  62                         $dbw = wfGetDB( DB_MASTER );
  63                         $dbw->onTransactionIdle( function () use ( $job ) {
  64                                 $job->run(); // just do the purge query now
  65                         } );
  66                 }
  67
  68                 wfProfileOut( __METHOD__ );
  69         }
  70 }