# Copyright 2021 EMQ Technologies Co., Ltd. # # 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 abc import abstractmethod from .runtime.context import Context class Source(object): """abstract class for eKuiper source plugin""" @abstractmethod def configure(self, datasource: str, conf: dict): """configure with the string datasource and conf map and raise error if any""" pass @abstractmethod def open(self, ctx: Context): """run continuously and send out the data or error with ctx""" pass @abstractmethod def close(self, ctx: Context): """stop running and clean up""" pass