public function __construct()
{
$this->request = Scalr_UI_Request::getInstance();
$this->response = Scalr_UI_Response::getInstance();
$this->db = Core::getDBInstance();
$this->user = $this->request->getUser();
$this->environment = $this->request->getEnvironment();
date_default_timezone_set(SCALR_SERVER_TZ);
}