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fixed_set_assigner.py
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fixed_set_assigner.py
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# 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.
import asyncio
from typing import Set
from google.cloud.pubsublite.internal.wire.assigner import Assigner
from google.cloud.pubsublite.types.partition import Partition
class FixedSetAssigner(Assigner):
_partitions: Set[Partition]
_returned_set: bool
def __init__(self, partitions: Set[Partition]):
self._partitions = partitions
self._returned_set = False
async def get_assignment(self) -> Set[Partition]:
"""Only returns an assignment the first iteration."""
if self._returned_set:
await asyncio.sleep(float("inf"))
raise RuntimeError("Should never happen.")
self._returned_set = True
return self._partitions
async def __aenter__(self):
return self
async def __aexit__(self, exc_type, exc_value, traceback):
pass