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- # -*- coding: utf-8 -*-
- # Copyright 2017 Elisey Zanko
- #
- # 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 sys
- from pip._vendor.tenacity import BaseRetrying
- from pip._vendor.tenacity import DoAttempt
- from pip._vendor.tenacity import DoSleep
- from pip._vendor.tenacity import RetryCallState
- from tornado import gen
- class TornadoRetrying(BaseRetrying):
- def __init__(self, sleep=gen.sleep, **kwargs):
- super(TornadoRetrying, self).__init__(**kwargs)
- self.sleep = sleep
- @gen.coroutine
- def __call__(self, fn, *args, **kwargs):
- self.begin(fn)
- retry_state = RetryCallState(retry_object=self, fn=fn, args=args, kwargs=kwargs)
- while True:
- do = self.iter(retry_state=retry_state)
- if isinstance(do, DoAttempt):
- try:
- result = yield fn(*args, **kwargs)
- except BaseException: # noqa: B902
- retry_state.set_exception(sys.exc_info())
- else:
- retry_state.set_result(result)
- elif isinstance(do, DoSleep):
- retry_state.prepare_for_next_attempt()
- yield self.sleep(do)
- else:
- raise gen.Return(do)
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