firestar5683
102 lines
3.2 KiB
Python
102 lines
3.2 KiB
Python
from asyncio import Future
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from datetime import datetime
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from typing import Any, Callable, Optional, TypeVar, Union
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from reactivex import Observable, abc, from_future, throw, typing
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from reactivex.disposable import (
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CompositeDisposable,
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SerialDisposable,
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SingleAssignmentDisposable,
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)
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from reactivex.scheduler import TimeoutScheduler
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_T = TypeVar("_T")
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def timeout_(
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duetime: typing.AbsoluteOrRelativeTime,
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other: Optional[Union[Observable[_T], "Future[_T]"]] = None,
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scheduler: Optional[abc.SchedulerBase] = None,
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) -> Callable[[Observable[_T]], Observable[_T]]:
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other = other or throw(Exception("Timeout"))
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if isinstance(other, Future):
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obs = from_future(other)
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else:
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obs = other
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def timeout(source: Observable[_T]) -> Observable[_T]:
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"""Returns the source observable sequence or the other observable
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sequence if duetime elapses.
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Examples:
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>>> res = timeout(source)
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Args:
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source: Source observable to timeout
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Returns:
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An obserable sequence switching to the other sequence in
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case of a timeout.
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"""
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def subscribe(
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observer: abc.ObserverBase[_T],
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scheduler_: Optional[abc.SchedulerBase] = None,
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) -> abc.DisposableBase:
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_scheduler = scheduler or scheduler_ or TimeoutScheduler.singleton()
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switched = [False]
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_id = [0]
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original = SingleAssignmentDisposable()
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subscription = SerialDisposable()
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timer = SerialDisposable()
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subscription.disposable = original
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def create_timer() -> None:
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my_id = _id[0]
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def action(scheduler: abc.SchedulerBase, state: Any = None):
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switched[0] = _id[0] == my_id
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timer_wins = switched[0]
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if timer_wins:
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subscription.disposable = obs.subscribe(
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observer, scheduler=scheduler
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)
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if isinstance(duetime, datetime):
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timer.disposable = _scheduler.schedule_absolute(duetime, action)
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else:
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timer.disposable = _scheduler.schedule_relative(duetime, action)
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create_timer()
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def on_next(value: _T) -> None:
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send_wins = not switched[0]
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if send_wins:
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_id[0] += 1
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observer.on_next(value)
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create_timer()
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def on_error(error: Exception) -> None:
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on_error_wins = not switched[0]
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if on_error_wins:
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_id[0] += 1
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observer.on_error(error)
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def on_completed() -> None:
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on_completed_wins = not switched[0]
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if on_completed_wins:
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_id[0] += 1
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observer.on_completed()
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original.disposable = source.subscribe(
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on_next, on_error, on_completed, scheduler=scheduler_
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)
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return CompositeDisposable(subscription, timer)
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return Observable(subscribe)
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return timeout
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