includes/cache/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         /**
  31          * @var Title
  32          */
  33         public $mTitle;
  34
  35         public $mTable;
  36
  37         /**
  38          * @param $titleTo
  39          * @param $table
  40          * @param $start bool
  41          * @param $end bool
  42          */
  43         function __construct( Title $titleTo, $table ) {
  44                 $this->mTitle = $titleTo;
  45                 $this->mTable = $table;
  46         }
  47
  48         public function doUpdate() {
  49                 wfProfileIn( __METHOD__ );
  50
  51                 $job = new HTMLCacheUpdateJob(
  52                         $this->mTitle,
  53                         array(
  54                                 'table' => $this->mTable,
  55                         ) + Job::newRootJobParams( // "overall" refresh links job info
  56                                 "htmlCacheUpdate:{$this->mTable}:{$this->mTitle->getPrefixedText()}"
  57                         )
  58                 );
  59
  60                 $count = $this->mTitle->getBacklinkCache()->getNumLinks( $this->mTable, 200 );
  61                 if ( $count >= 200 ) { // many backlinks
  62                         JobQueueGroup::singleton()->push( $job );
  63                         JobQueueGroup::singleton()->deduplicateRootJob( $job );
  64                 } else { // few backlinks ($count might be off even if 0)
  65                         $dbw = wfGetDB( DB_MASTER );
  66                         $dbw->onTransactionIdle( function() use ( $job ) {
  67                                 $job->run(); // just do the purge query now
  68                         } );
  69                 }
  70
  71                 wfProfileOut( __METHOD__ );
  72         }
  73 }