final protected static function Database::openConnection

Opens a connection to the server specified by the given key and target.

Parameters

$key: The database connection key, as specified in settings.php. The default is "default".

$target: The database target to open.

Throws

DatabaseConnectionNotDefinedException

DatabaseDriverNotSpecifiedException

File

includes/database/database.inc, line 1777

Core systems for the database layer.

Class

Database

Primary front-controller for the database system.

Code

protected static final function openConnection($key, $target) {
  if (empty(self::$databaseInfo)) {
    self::parseConnectionInfo();
  }

  // If the requested database does not exist then it is an unrecoverable
  // error.
  if (!isset(self::$databaseInfo[$key])) {
    throw new DatabaseConnectionNotDefinedException('The specified database connection is not defined: ' . $key);
  }
  if (!($driver = self::$databaseInfo[$key][$target]['driver'])) {
    throw new DatabaseDriverNotSpecifiedException('Driver not specified for this database connection: ' . $key);
  }

  // We cannot rely on the registry yet, because the registry requires an
  // open database connection.
  $driver_class = 'DatabaseConnection_' . $driver;
  require_once DRUPAL_ROOT . '/includes/database/' . $driver . '/database.inc';
  $new_connection = new $driver_class(self::$databaseInfo[$key][$target]);
  $new_connection
    ->setTarget($target);
  $new_connection
    ->setKey($key);

  // If we have any active logging objects for this connection key, we need
  // to associate them with the connection we just opened.
  if (!empty(self::$logs[$key])) {
    $new_connection
      ->setLogger(self::$logs[$key]);
  }
  return $new_connection;
}