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# 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 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
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
@gen.coroutine
def __call__( # type: ignore # Change signature from supertype
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())
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)