95 lines
3.5 KiB
Python
95 lines
3.5 KiB
Python
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# Copyright 2016 Étienne Bersac
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# Copyright 2016 Julien Danjou
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# Copyright 2016 Joshua Harlow
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# Copyright 2013-2014 Ray Holder
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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 functools
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import sys
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import typing as t
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from asyncio import sleep
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from pip._vendor.tenacity import AttemptManager
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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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WrappedFnReturnT = t.TypeVar("WrappedFnReturnT")
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WrappedFn = t.TypeVar("WrappedFn", bound=t.Callable[..., t.Awaitable[t.Any]])
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class AsyncRetrying(BaseRetrying):
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sleep: t.Callable[[float], t.Awaitable[t.Any]]
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def __init__(self, sleep: t.Callable[[float], t.Awaitable[t.Any]] = sleep, **kwargs: t.Any) -> None:
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super().__init__(**kwargs)
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self.sleep = sleep
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async def __call__( # type: ignore[override]
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self, fn: WrappedFn, *args: t.Any, **kwargs: t.Any
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) -> WrappedFnReturnT:
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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 = await fn(*args, **kwargs)
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except BaseException: # noqa: B902
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retry_state.set_exception(sys.exc_info()) # type: ignore[arg-type]
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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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await self.sleep(do)
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else:
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return do # type: ignore[no-any-return]
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def __iter__(self) -> t.Generator[AttemptManager, None, None]:
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raise TypeError("AsyncRetrying object is not iterable")
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def __aiter__(self) -> "AsyncRetrying":
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self.begin()
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self._retry_state = RetryCallState(self, fn=None, args=(), kwargs={})
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return self
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async def __anext__(self) -> AttemptManager:
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while True:
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do = self.iter(retry_state=self._retry_state)
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if do is None:
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raise StopAsyncIteration
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elif isinstance(do, DoAttempt):
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return AttemptManager(retry_state=self._retry_state)
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elif isinstance(do, DoSleep):
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self._retry_state.prepare_for_next_attempt()
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await self.sleep(do)
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else:
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raise StopAsyncIteration
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def wraps(self, fn: WrappedFn) -> WrappedFn:
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fn = super().wraps(fn)
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# Ensure wrapper is recognized as a coroutine function.
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@functools.wraps(fn)
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async def async_wrapped(*args: t.Any, **kwargs: t.Any) -> t.Any:
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return await fn(*args, **kwargs)
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# Preserve attributes
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async_wrapped.retry = fn.retry # type: ignore[attr-defined]
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async_wrapped.retry_with = fn.retry_with # type: ignore[attr-defined]
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return async_wrapped # type: ignore[return-value]
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