"""MQTT message model."""
# Copyright 2019 WolkAbout Technology s.r.o.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from dataclasses import dataclass
from dataclasses import field
from typing import Optional
from typing import Union
[docs]@dataclass
class Message:
"""
MQTT message identified by topic and payload.
:ivar topic: Topic where the message is from or will be sent to
:vartype topic: str
:ivar payload: Content of the message
:vartype payload: bytes or str or bytearray or None
"""
topic: str
payload: Optional[Union[str, bytes, bytearray]] = field(default=None)