maintenance/getReplicaServer.php

   1 <?php
   2 /**
   3  * Reports the hostname of a replica DB server.
   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 Maintenance
  22  */
  23
  24 require_once __DIR__ . '/Maintenance.php';
  25
  26 /**
  27  * Maintenance script that reports the hostname of a replica DB server.
  28  *
  29  * @ingroup Maintenance
  30  */
  31 class GetSlaveServer extends Maintenance {
  32         public function __construct() {
  33                 parent::__construct();
  34                 $this->addOption( "group", "Query group to check specifically" );
  35                 $this->addDescription( 'Report the hostname of a replica DB server' );
  36         }
  37
  38         public function execute() {
  39                 global $wgAllDBsAreLocalhost;
  40                 if ( $wgAllDBsAreLocalhost ) {
  41                         $host = 'localhost';
  42                 } elseif ( $this->hasOption( 'group' ) ) {
  43                         $db = $this->getDB( DB_REPLICA, $this->getOption( 'group' ) );
  44                         $host = $db->getServer();
  45                 } else {
  46                         $lb = wfGetLB();
  47                         $i = $lb->getReaderIndex();
  48                         $host = $lb->getServerName( $i );
  49                 }
  50                 $this->output( "$host\n" );
  51         }
  52 }
  53
  54 $maintClass = "GetSlaveServer";
  55 require_once RUN_MAINTENANCE_IF_MAIN;