includes/filerepo/ForeignDBViaLBRepo.php

   1 <?php
   2 /**
   3  * A foreign repository with a MediaWiki database accessible via the configured LBFactory.
   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 FileRepo
  22  */
  23
  24 /**
  25  * A foreign repository with a MediaWiki database accessible via the configured LBFactory
  26  *
  27  * @ingroup FileRepo
  28  */
  29 class ForeignDBViaLBRepo extends LocalRepo {
  30         /** @var string */
  31         protected $wiki;
  32
  33         /** @var string */
  34         protected $dbName;
  35
  36         /** @var string */
  37         protected $tablePrefix;
  38
  39         /** @var array */
  40         protected $fileFactory = array( 'ForeignDBFile', 'newFromTitle' );
  41
  42         /** @var array */
  43         protected $fileFromRowFactory = array( 'ForeignDBFile', 'newFromRow' );
  44
  45         /**
  46          * @param array|null $info
  47          */
  48         function __construct( $info ) {
  49                 parent::__construct( $info );
  50                 $this->wiki = $info['wiki'];
  51                 list( $this->dbName, $this->tablePrefix ) = wfSplitWikiID( $this->wiki );
  52                 $this->hasSharedCache = $info['hasSharedCache'];
  53         }
  54
  55         /**
  56          * @return DatabaseBase
  57          */
  58         function getMasterDB() {
  59                 return wfGetDB( DB_MASTER, array(), $this->wiki );
  60         }
  61
  62         /**
  63          * @return DatabaseBase
  64          */
  65         function getSlaveDB() {
  66                 return wfGetDB( DB_SLAVE, array(), $this->wiki );
  67         }
  68
  69         function hasSharedCache() {
  70                 return $this->hasSharedCache;
  71         }
  72
  73         /**
  74          * Get a key on the primary cache for this repository.
  75          * Returns false if the repository's cache is not accessible at this site.
  76          * The parameters are the parts of the key, as for wfMemcKey().
  77          * @return bool|string
  78          */
  79         function getSharedCacheKey( /*...*/ ) {
  80                 if ( $this->hasSharedCache() ) {
  81                         $args = func_get_args();
  82                         array_unshift( $args, $this->wiki );
  83
  84                         return implode( ':', $args );
  85                 } else {
  86                         return false;
  87                 }
  88         }
  89
  90         protected function assertWritableRepo() {
  91                 throw new MWException( get_class( $this ) . ': write operations are not supported.' );
  92         }
  93
  94         public function getInfo() {
  95                 return FileRepo::getInfo();
  96         }
  97 }