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<?php |
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/** |
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* Simple generator of database connections that always returns the same object. |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License along |
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* with this program; if not, write to the Free Software Foundation, Inc., |
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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* http://www.gnu.org/copyleft/gpl.html |
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* |
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* @file |
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* @ingroup Database |
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*/ |
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/** |
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* An LBFactory class that always returns a single database object. |
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*/ |
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class LBFactorySingle extends LBFactory { |
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/** @var LoadBalancerSingle */ |
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private $lb; |
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/** |
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* @param array $conf An associative array with one member: |
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* - connection: The IDatabase connection object |
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*/ |
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public function __construct( array $conf ) { |
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parent::__construct( $conf ); |
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if ( !isset( $conf['connection'] ) ) { |
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throw new InvalidArgumentException( "Missing 'connection' argument." ); |
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} |
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$lb = new LoadBalancerSingle( array_merge( $this->baseLoadBalancerParams(), $conf ) ); |
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$this->initLoadBalancer( $lb ); |
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$this->lb = $lb; |
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} |
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/** |
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* @param IDatabase $db Live connection handle |
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* @param array $params Parameter map to LBFactorySingle::__constructs() |
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* @return LBFactorySingle |
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* @since 1.28 |
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*/ |
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public static function newFromConnection( IDatabase $db, array $params = [] ) { |
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return new static( [ 'connection' => $db ] + $params ); |
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} |
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/** |
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* @param bool|string $domain (unused) |
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* @return LoadBalancerSingle |
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*/ |
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public function newMainLB( $domain = false ) { |
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return $this->lb; |
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} |
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/** |
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* @param bool|string $domain (unused) |
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* @return LoadBalancerSingle |
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*/ |
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public function getMainLB( $domain = false ) { |
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return $this->lb; |
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} |
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public function newExternalLB( $cluster ) { |
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throw new BadMethodCallException( "Method is not supported." ); |
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} |
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public function getExternalLB( $cluster ) { |
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throw new BadMethodCallException( "Method is not supported." ); |
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} |
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/** |
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* @return LoadBalancerSingle[] Map of (cluster name => LoadBalancer) |
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*/ |
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public function getAllMainLBs() { |
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return [ 'DEFAULT' => $this->lb ]; |
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} |
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/** |
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* @return LoadBalancerSingle[] Map of (cluster name => LoadBalancer) |
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*/ |
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public function getAllExternalLBs() { |
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return []; |
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} |
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/** |
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* @param string|callable $callback |
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* @param array $params |
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*/ |
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public function forEachLB( $callback, array $params = [] ) { |
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call_user_func_array( $callback, array_merge( [ $this->lb ], $params ) ); |
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} |
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} |
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wikimedia /
mediawiki
