# Path: grpclib/utils.py
# class DeadlineWrapper(Wrapper):
#     """Deadline wrapper to specify deadline once for any number of awaiting
#     method calls.
# 
#     Example:
# 
#     .. code-block:: python3
# 
#         dw = DeadlineWrapper()
# 
#         with dw.start(deadline):
#             await handle_request()
# 
#         # somewhere during request handling:
# 
#         async def blocking_call():
#             with dw:
#                 await asyncio.sleep(10)
# 
#     """
#     @contextmanager
#     def start(self, deadline: 'Deadline') -> Iterator[None]:
#         timeout = deadline.time_remaining()
#         if not timeout:
#             raise asyncio.TimeoutError('Deadline exceeded')
# 
#         def callback() -> None:
#             self.cancel(asyncio.TimeoutError('Deadline exceeded'))
# 
#         loop = asyncio.get_event_loop()
#         timer = loop.call_later(timeout, callback)
#         try:
#             yield
#         finally:
#             timer.cancel()
# 
# Path: grpclib/metadata.py
# class Deadline:
#     """Represents request's deadline - fixed point in time
#     """
#     def __init__(self, *, _timestamp: float) -> None:
#         self._timestamp = _timestamp
# 
#     def __lt__(self, other: object) -> bool:
#         if not isinstance(other, Deadline):
#             raise TypeError('comparison is not supported between '
#                             'instances of \'{}\' and \'{}\''
#                             .format(type(self).__name__, type(other).__name__))
#         return self._timestamp < other._timestamp
# 
#     def __eq__(self, other: object) -> bool:
#         if not isinstance(other, Deadline):
#             return False
#         return self._timestamp == other._timestamp
# 
#     @classmethod
#     def from_headers(cls, headers: _Headers) -> Optional['Deadline']:
#         timeout = min(map(decode_timeout,
#                           (v for k, v in headers if k == 'grpc-timeout')),
#                       default=None)
#         if timeout is not None:
#             return cls.from_timeout(timeout)
#         else:
#             return None
# 
#     @classmethod
#     def from_timeout(cls, timeout: float) -> 'Deadline':
#         return cls(_timestamp=time.monotonic() + timeout)
# 
#     def time_remaining(self) -> float:
#         """Calculates remaining time for the current request completion
# 
#         This function returns time in seconds as a floating point number,
#         greater or equal to zero.
#         """
#         return max(0, self._timestamp - time.monotonic())


import abc
import time
import asyncio
import logging
import warnings
from typing import Optional, Set, Callable, Awaitable
from ..utils import DeadlineWrapper
from ..metadata import Deadline




log = logging.getLogger(__name__)

DEFAULT_CHECK_TTL = 30
DEFAULT_CHECK_TIMEOUT = 10

_Status = Optional[bool]


class CheckBase(abc.ABC):

    @abc.abstractmethod
    def __status__(self) -> _Status:
        pass

    @abc.abstractmethod

# Path: grpclib/utils.py
# class DeadlineWrapper(Wrapper):
#     """Deadline wrapper to specify deadline once for any number of awaiting
#     method calls.
# 
#     Example:
# 
#     .. code-block:: python3
# 
#         dw = DeadlineWrapper()
# 
#         with dw.start(deadline):
#             await handle_request()
# 
#         # somewhere during request handling:
# 
#         async def blocking_call():
#             with dw:
#                 await asyncio.sleep(10)
# 
#     """
#     @contextmanager
#     def start(self, deadline: 'Deadline') -> Iterator[None]:
#         timeout = deadline.time_remaining()
#         if not timeout:
#             raise asyncio.TimeoutError('Deadline exceeded')
# 
#         def callback() -> None:
#             self.cancel(asyncio.TimeoutError('Deadline exceeded'))
# 
#         loop = asyncio.get_event_loop()
#         timer = loop.call_later(timeout, callback)
#         try:
#             yield
#         finally:
#             timer.cancel()
# 
# Path: grpclib/metadata.py
# class Deadline:
#     """Represents request's deadline - fixed point in time
#     """
#     def __init__(self, *, _timestamp: float) -> None:
#         self._timestamp = _timestamp
# 
#     def __lt__(self, other: object) -> bool:
#         if not isinstance(other, Deadline):
#             raise TypeError('comparison is not supported between '
#                             'instances of \'{}\' and \'{}\''
#                             .format(type(self).__name__, type(other).__name__))
#         return self._timestamp < other._timestamp
# 
#     def __eq__(self, other: object) -> bool:
#         if not isinstance(other, Deadline):
#             return False
#         return self._timestamp == other._timestamp
# 
#     @classmethod
#     def from_headers(cls, headers: _Headers) -> Optional['Deadline']:
#         timeout = min(map(decode_timeout,
#                           (v for k, v in headers if k == 'grpc-timeout')),
#                       default=None)
#         if timeout is not None:
#             return cls.from_timeout(timeout)
#         else:
#             return None
# 
#     @classmethod
#     def from_timeout(cls, timeout: float) -> 'Deadline':
#         return cls(_timestamp=time.monotonic() + timeout)
# 
#     def time_remaining(self) -> float:
#         """Calculates remaining time for the current request completion
# 
#         This function returns time in seconds as a floating point number,
#         greater or equal to zero.
#         """
#         return max(0, self._timestamp - time.monotonic())


# Path: grpclib/health/check.py
import abc
import time
import asyncio
import logging
import warnings
from typing import Optional, Set, Callable, Awaitable
from ..utils import DeadlineWrapper
from ..metadata import Deadline





log = logging.getLogger(__name__)

DEFAULT_CHECK_TTL = 30
DEFAULT_CHECK_TIMEOUT = 10

_Status = Optional[bool]


class CheckBase(abc.ABC):

    @abc.abstractmethod
    def __status__(self) -> _Status:
        pass

    @abc.abstractmethod

    async def __check__(self) -> _Status: