partition_count_watcher.py

# Copyright 2020 Google LLC
#
# 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, ABCMeta
from typing import AsyncContextManager


class PartitionCountWatcher(AsyncContextManager, metaclass=ABCMeta):
    @abstractmethod
    async def get_partition_count(self) -> int:
        raise NotImplementedError()