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<?php
/**
* Simple generator of database connections that always returns the same object.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
* @ingroup Database
*/
/**
* An LBFactory class that always returns a single database object.
*/
class LBFactorySingle extends LBFactory {
/** @var LoadBalancerSingle */
private $lb;
/**
* @param array $conf An associative array with one member:
* - connection: The DatabaseBase connection object
*/
public function __construct( array $conf ) {
$this->lb = new LoadBalancerSingle( $conf );
}
/**
* @param bool|string $wiki
* @return LoadBalancerSingle
*/
public function newMainLB( $wiki = false ) {
return $this->lb;
}
/**
* @param bool|string $wiki
* @return LoadBalancerSingle
*/
public function getMainLB( $wiki = false ) {
return $this->lb;
}
/**
* @param string $cluster External storage cluster, or false for core
* @param bool|string $wiki Wiki ID, or false for the current wiki
* @return LoadBalancerSingle
*/
protected function newExternalLB( $cluster, $wiki = false ) {
return $this->lb;
}
/**
* @param string $cluster External storage cluster, or false for core
* @param bool|string $wiki Wiki ID, or false for the current wiki
* @return LoadBalancerSingle
*/
public function &getExternalLB( $cluster, $wiki = false ) {
return $this->lb;
}
/**
* @param string|callable $callback
* @param array $params
*/
public function forEachLB( $callback, array $params = array() ) {
call_user_func_array( $callback, array_merge( array( $this->lb ), $params ) );
}
}
/**
* Helper class for LBFactorySingle.
*/
class LoadBalancerSingle extends LoadBalancer {
/** @var DatabaseBase */
private $db;
/**
* @param array $params
*/
public function __construct( array $params ) {
$this->db = $params['connection'];
parent::__construct( array( 'servers' => array( array(
'type' => $this->db->getType(),
'host' => $this->db->getServer(),
'dbname' => $this->db->getDBname(),
'load' => 1,
) ) ) );
}
/**
*
* @param string $server
* @param bool $dbNameOverride
*
* @return DatabaseBase
*/
protected function reallyOpenConnection( $server, $dbNameOverride = false ) {
return $this->db;
}
}
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