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Sleeping
| # 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 | |
| import typing | |
| from tenacity import BaseRetrying | |
| from tenacity import DoAttempt | |
| from tenacity import DoSleep | |
| from tenacity import RetryCallState | |
| from tornado import gen | |
| if typing.TYPE_CHECKING: | |
| from tornado.concurrent import Future | |
| _RetValT = typing.TypeVar("_RetValT") | |
| class TornadoRetrying(BaseRetrying): | |
| def __init__( | |
| self, | |
| sleep: "typing.Callable[[float], Future[None]]" = gen.sleep, | |
| **kwargs: typing.Any, | |
| ) -> None: | |
| super().__init__(**kwargs) | |
| self.sleep = sleep | |
| # type: ignore[misc] | |
| def __call__( | |
| self, | |
| fn: "typing.Callable[..., typing.Union[typing.Generator[typing.Any, typing.Any, _RetValT], Future[_RetValT]]]", | |
| *args: typing.Any, | |
| **kwargs: typing.Any, | |
| ) -> "typing.Generator[typing.Any, typing.Any, _RetValT]": | |
| self.begin() | |
| 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()) # type: ignore[arg-type] | |
| 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) | |