1 files changed, 57 insertions, 0 deletions
diff --git a/includes/db/LBFactory_Single.php b/includes/db/LBFactory_Single.php
new file mode 100644
index 00000000..25acdc5b
--- /dev/null
+++ b/includes/db/LBFactory_Single.php
@@ -0,0 +1,57 @@
+<?php
+
+/**
+ * An LBFactory class that always returns a single database object.
+ */
+class LBFactory_Single extends LBFactory {
+	protected $lb;
+
+	/**
+	 * @param $conf An associative array with one member:
+	 *  - connection: The DatabaseBase connection object
+	 */
+	function __construct( $conf ) {
+		$this->lb = new LoadBalancer_Single( $conf );
+	}
+
+	function newMainLB( $wiki = false ) {
+		return $this->lb;
+	}
+
+	function getMainLB( $wiki = false ) {
+		return $this->lb;
+	}
+
+	function newExternalLB( $cluster, $wiki = false ) {
+		return $this->lb;
+	}
+
+	function &getExternalLB( $cluster, $wiki = false ) {
+		return $this->lb;
+	}
+
+	function forEachLB( $callback, $params = array() ) {
+		call_user_func_array( $callback, array_merge( array( $this->lb ), $params ) );
+	}
+}
+
+/**
+ * Helper class for LBFactory_Single.
+ */
+class LoadBalancer_Single extends LoadBalancer {
+	var $db;
+
+	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,
+		) ) ) );
+	}
+
+	function reallyOpenConnection( $server, $dbNameOverride = false ) {
+		return $this->db;
+	}
+}