1 files changed, 112 insertions, 0 deletions
diff --git a/includes/db/LBFactorySingle.php b/includes/db/LBFactorySingle.php
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+++ b/includes/db/LBFactorySingle.php
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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 */
+	protected $lb;
+
+	/**
+	 * @param array $conf An associative array with one member:
+	 *  - connection: The DatabaseBase connection object
+	 */
+	function __construct( $conf ) {
+		$this->lb = new LoadBalancerSingle( $conf );
+	}
+
+	/**
+	 * @param bool|string $wiki
+	 * @return LoadBalancerSingle
+	 */
+	function newMainLB( $wiki = false ) {
+		return $this->lb;
+	}
+
+	/**
+	 * @param bool|string $wiki
+	 * @return LoadBalancerSingle
+	 */
+	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
+	 */
+	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
+	 */
+	function &getExternalLB( $cluster, $wiki = false ) {
+		return $this->lb;
+	}
+
+	/**
+	 * @param string|callable $callback
+	 * @param array $params
+	 */
+	function forEachLB( $callback, $params = array() ) {
+		call_user_func_array( $callback, array_merge( array( $this->lb ), $params ) );
+	}
+}
+
+/**
+ * Helper class for LBFactorySingle.
+ */
+class LoadBalancerSingle extends LoadBalancer {
+	/** @var DatabaseBase */
+	protected $db;
+
+	/**
+	 * @param array $params
+	 */
+	function __construct( $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
+	 */
+	function reallyOpenConnection( $server, $dbNameOverride = false ) {
+		return $this->db;
+	}
+}