public function execute()
 {
     $context =& $this->getContext();
     $user = $context->getUser();
     $request = $context->getRequest();
     $acs_user_info_row = $user->getAttribute('acs_user_info_row');
     // ユーザランキング情報一覧を取得する
     $ranking_user_info_row_array = ACSUser::get_ranking_user_info_row_array();
     // set
     $request->setAttribute('ranking_user_info_row_array', $ranking_user_info_row_array);
     return View::INPUT;
 }