# Copyright 2020 Huawei 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.
# ============================================================================
"""Define the stream handler base."""
from abc import abstractmethod


class StreamHandlerBase:
    """The stream handler base."""

    @abstractmethod
    def put(self, value):
        """Abstract method of set data."""
        return NotImplementedError

    @abstractmethod
    def get(self, filter_condition):
        """Abstract method of get data."""
        return NotImplementedError

    def clean(self):
        """Clean cache."""
        self.__init__()
