60 lines
2.1 KiB
Python
60 lines
2.1 KiB
Python
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# Copyright 2017 Elisey Zanko
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import sys
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import typing
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from pip._vendor.tenacity import BaseRetrying
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from pip._vendor.tenacity import DoAttempt
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from pip._vendor.tenacity import DoSleep
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from pip._vendor.tenacity import RetryCallState
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from tornado import gen
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if typing.TYPE_CHECKING:
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from tornado.concurrent import Future
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_RetValT = typing.TypeVar("_RetValT")
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class TornadoRetrying(BaseRetrying):
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def __init__(self, sleep: "typing.Callable[[float], Future[None]]" = gen.sleep, **kwargs: typing.Any) -> None:
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super().__init__(**kwargs)
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self.sleep = sleep
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@gen.coroutine
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def __call__( # type: ignore # Change signature from supertype
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self,
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fn: "typing.Callable[..., typing.Union[typing.Generator[typing.Any, typing.Any, _RetValT], Future[_RetValT]]]",
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*args: typing.Any,
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**kwargs: typing.Any,
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) -> "typing.Generator[typing.Any, typing.Any, _RetValT]":
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self.begin()
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retry_state = RetryCallState(retry_object=self, fn=fn, args=args, kwargs=kwargs)
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while True:
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do = self.iter(retry_state=retry_state)
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if isinstance(do, DoAttempt):
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try:
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result = yield fn(*args, **kwargs)
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except BaseException: # noqa: B902
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retry_state.set_exception(sys.exc_info())
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else:
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retry_state.set_result(result)
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elif isinstance(do, DoSleep):
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retry_state.prepare_for_next_attempt()
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yield self.sleep(do)
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else:
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raise gen.Return(do)
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