Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>

This program is free software: you can use, redistribute, and/or modify
it under the terms of the GNU Affero General Public License, version 3
or later ("AGPL"), as published by the Free Software Foundation.

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.

You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.