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# Copyright 2016–2021 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 abc
import typing
from tenacity import _utils
from tenacity import retry_base
if typing.TYPE_CHECKING:
from tenacity import RetryCallState
class async_retry_base(retry_base):
"""Abstract base class for async retry strategies."""
@abc.abstractmethod
async def __call__(self, retry_state: "RetryCallState") -> bool: # type: ignore[override]
pass
def __and__( # type: ignore[override]
self, other: "typing.Union[retry_base, async_retry_base]"
) -> "retry_all":
return retry_all(self, other)
def __rand__( # type: ignore[misc,override]
self, other: "typing.Union[retry_base, async_retry_base]"
) -> "retry_all":
return retry_all(other, self)
def __or__( # type: ignore[override]
self, other: "typing.Union[retry_base, async_retry_base]"
) -> "retry_any":
return retry_any(self, other)
def __ror__( # type: ignore[misc,override]
self, other: "typing.Union[retry_base, async_retry_base]"
) -> "retry_any":
return retry_any(other, self)
RetryBaseT = typing.Union[
async_retry_base, typing.Callable[["RetryCallState"], typing.Awaitable[bool]]
]
class retry_if_exception(async_retry_base):
"""Retry strategy that retries if an exception verifies a predicate."""
def __init__(
self, predicate: typing.Callable[[BaseException], typing.Awaitable[bool]]
) -> None:
self.predicate = predicate
async def __call__(self, retry_state: "RetryCallState") -> bool: # type: ignore[override]
if retry_state.outcome is None:
raise RuntimeError("__call__() called before outcome was set")
if retry_state.outcome.failed:
exception = retry_state.outcome.exception()
if exception is None:
raise RuntimeError("outcome failed but the exception is None")
return await self.predicate(exception)
else:
return False
class retry_if_result(async_retry_base):
"""Retries if the result verifies a predicate."""
def __init__(
self, predicate: typing.Callable[[typing.Any], typing.Awaitable[bool]]
) -> None:
self.predicate = predicate
async def __call__(self, retry_state: "RetryCallState") -> bool: # type: ignore[override]
if retry_state.outcome is None:
raise RuntimeError("__call__() called before outcome was set")
if not retry_state.outcome.failed:
return await self.predicate(retry_state.outcome.result())
else:
return False
class retry_any(async_retry_base):
"""Retries if any of the retries condition is valid."""
def __init__(self, *retries: typing.Union[retry_base, async_retry_base]) -> None:
self.retries = retries
async def __call__(self, retry_state: "RetryCallState") -> bool: # type: ignore[override]
result = False
for r in self.retries:
result = result or await _utils.wrap_to_async_func(r)(retry_state)
if result:
break
return result
class retry_all(async_retry_base):
"""Retries if all the retries condition are valid."""
def __init__(self, *retries: typing.Union[retry_base, async_retry_base]) -> None:
self.retries = retries
async def __call__(self, retry_state: "RetryCallState") -> bool: # type: ignore[override]
result = True
for r in self.retries:
result = result and await _utils.wrap_to_async_func(r)(retry_state)
if not result:
break
return result
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