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reset_signal.py
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reset_signal.py
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# Copyright 2021 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 google.api_core.exceptions import GoogleAPICallError
from google.cloud.pubsublite.internal.status_codes import is_retryable
from google.rpc.error_details_pb2 import ErrorInfo
from grpc_status import rpc_status
def is_reset_signal(error: GoogleAPICallError) -> bool:
"""
Determines whether the given error contains the stream RESET signal, sent by
the server to instruct clients to reset stream state.
Returns: True if the error contains the RESET signal.
"""
if not is_retryable(error) or not error.response:
return False
try:
status = rpc_status.from_call(error.response)
if not status:
return False
for detail in status.details:
if detail.Is(ErrorInfo.DESCRIPTOR):
info = ErrorInfo()
if (
detail.Unpack(info)
and info.reason == "RESET"
and info.domain == "pubsublite.googleapis.com"
):
return True
except ValueError:
pass
return False