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# Copyright 2016 Étienne Bersac | |
# Copyright 2016 Julien Danjou | |
# Copyright 2016 Joshua Harlow | |
# Copyright 2013-2014 Ray Holder | |
# | |
# 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 functools | |
import sys | |
import typing | |
from asyncio import sleep | |
from pip._vendor.tenacity import AttemptManager | |
from pip._vendor.tenacity import BaseRetrying | |
from pip._vendor.tenacity import DoAttempt | |
from pip._vendor.tenacity import DoSleep | |
from pip._vendor.tenacity import RetryCallState | |
WrappedFn = typing.TypeVar("WrappedFn", bound=typing.Callable) | |
_RetValT = typing.TypeVar("_RetValT") | |
class AsyncRetrying(BaseRetrying): | |
def __init__(self, sleep: typing.Callable[[float], typing.Awaitable] = sleep, **kwargs: typing.Any) -> None: | |
super().__init__(**kwargs) | |
self.sleep = sleep | |
async def __call__( # type: ignore # Change signature from supertype | |
self, | |
fn: typing.Callable[..., typing.Awaitable[_RetValT]], | |
*args: typing.Any, | |
**kwargs: 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 = await 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() | |
await self.sleep(do) | |
else: | |
return do | |
def __aiter__(self) -> "AsyncRetrying": | |
self.begin() | |
self._retry_state = RetryCallState(self, fn=None, args=(), kwargs={}) | |
return self | |
async def __anext__(self) -> typing.Union[AttemptManager, typing.Any]: | |
while True: | |
do = self.iter(retry_state=self._retry_state) | |
if do is None: | |
raise StopAsyncIteration | |
elif isinstance(do, DoAttempt): | |
return AttemptManager(retry_state=self._retry_state) | |
elif isinstance(do, DoSleep): | |
self._retry_state.prepare_for_next_attempt() | |
await self.sleep(do) | |
else: | |
return do | |
def wraps(self, fn: WrappedFn) -> WrappedFn: | |
fn = super().wraps(fn) | |
# Ensure wrapper is recognized as a coroutine function. | |
async def async_wrapped(*args: typing.Any, **kwargs: typing.Any) -> typing.Any: | |
return await fn(*args, **kwargs) | |
# Preserve attributes | |
async_wrapped.retry = fn.retry | |
async_wrapped.retry_with = fn.retry_with | |
return async_wrapped | |