#   Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
#
# 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.
# pylint: disable=doc-string-missing


class Op(object):
    def __init__(self,
                 name="",
                 input_ops=[],
                 server_endpoints=[],
                 concurrency=1,
                 timeout=-1,
                 retry=1):
        pass

    def _get_input_channel(self):
        pass

    def _get_output_channel(self):
        pass

    def preprocess(self, input_dict):
        pass

    def process(self, feed_dict):
        pass

    def postprocess(self, fetch_dict):
        pass

    def stop(self):
        pass

    def start_with_process(self):
        pass

    def start_with_thread(self):
        pass