def subscribe(
observer: abc.ObserverBase[_T],
scheduler: Optional[abc.SchedulerBase] = None,
):
is_open = [False]
def on_next(left: _T) -> None:
if is_open[0]:
observer.on_next(left)
def on_completed() -> None:
if is_open[0]:
observer.on_completed()
subs = source.subscribe(
on_next, observer.on_error, on_completed, scheduler=scheduler
)
subscriptions = CompositeDisposable(subs)
right_subscription = SingleAssignmentDisposable()
subscriptions.add(right_subscription)
def on_next2(x: Any) -> None:
is_open[0] = True
right_subscription.dispose()
def on_completed2():
right_subscription.dispose()
right_subscription.disposable = obs.subscribe(
on_next2, observer.on_error, on_completed2, scheduler=scheduler
)
return subscriptions
def _subscribe_core(
self,
observer: Optional[abc.ObserverBase[_T]] = None,
scheduler: Optional[abc.SchedulerBase] = None,
) -> abc.DisposableBase:
self.subscriptions.append(Subscription(self.scheduler.clock))
index = len(self.subscriptions) - 1
disp = CompositeDisposable()
def get_action(
notification: Notification[_T]) -> abc.ScheduledAction[_T]:
def action(scheduler: abc.SchedulerBase,
state: Any = None) -> abc.DisposableBase:
if observer:
notification.accept(observer)
return Disposable()
return action
for message in self.messages:
notification = message.value
if not isinstance(notification, Notification):
raise ValueError("Must be notification")
# Don't make closures within a loop
action = get_action(notification)
disp.add(self.scheduler.schedule_relative(message.time, action))
def dispose() -> None:
start = self.subscriptions[index].subscribe
end = self.scheduler.to_seconds(self.scheduler.now)
self.subscriptions[index] = Subscription(start, int(end))
disp.dispose()
return Disposable(dispose)
def subscribe(
observer: abc.ObserverBase[_T],
scheduler: Optional[abc.SchedulerBase] = None,
) -> abc.DisposableBase:
delays = CompositeDisposable()
at_end = [False]
def done():
if at_end[0] and delays.length == 0:
observer.on_completed()
subscription = SerialDisposable()
def start():
def on_next(x: _T) -> None:
try:
assert mapper
delay = mapper(x)
except Exception as error: # pylint: disable=broad-except
observer.on_error(error)
return
d = SingleAssignmentDisposable()
delays.add(d)
def on_next(_: Any) -> None:
observer.on_next(x)
delays.remove(d)
done()
def on_completed() -> None:
observer.on_next(x)
delays.remove(d)
done()
d.disposable = delay.subscribe(on_next,
observer.on_error,
on_completed,
scheduler=scheduler)
def on_completed() -> None:
at_end[0] = True
subscription.dispose()
done()
subscription.disposable = source.subscribe(on_next,
observer.on_error,
on_completed,
scheduler=scheduler)
if not sub_delay:
start()
else:
subscription.disposable = sub_delay.subscribe(
lambda _: start(), observer.on_error, start)
return CompositeDisposable(subscription, delays)
def test_groupdisposable_contains():
d1 = Disposable()
d2 = Disposable()
g = CompositeDisposable(d1, d2)
assert g.length == 2
assert g.contains(d1)
assert g.contains(d2)
def subscribe(
observer: abc.ObserverBase[_T],
scheduler: Optional[abc.SchedulerBase] = None,
):
active_count = [0]
group = CompositeDisposable()
is_stopped = [False]
queue: List[Observable[_T]] = []
def subscribe(xs: Observable[_T]):
subscription = SingleAssignmentDisposable()
group.add(subscription)
@synchronized(source.lock)
def on_completed():
group.remove(subscription)
if queue:
s = queue.pop(0)
subscribe(s)
else:
active_count[0] -= 1
if is_stopped[0] and active_count[0] == 0:
observer.on_completed()
on_next = synchronized(source.lock)(observer.on_next)
on_error = synchronized(source.lock)(observer.on_error)
subscription.disposable = xs.subscribe(on_next,
on_error,
on_completed,
scheduler=scheduler)
def on_next(inner_source: Observable[_T]) -> None:
assert max_concurrent
if active_count[0] < max_concurrent:
active_count[0] += 1
subscribe(inner_source)
else:
queue.append(inner_source)
def on_completed():
is_stopped[0] = True
if active_count[0] == 0:
observer.on_completed()
group.add(
source.subscribe(on_next,
observer.on_error,
on_completed,
scheduler=scheduler))
return group
def subscribe(
observer: abc.ObserverBase[Observable[_T]],
scheduler: Optional[abc.SchedulerBase] = None,
):
m = SerialDisposable()
d = CompositeDisposable(m)
r = RefCountDisposable(d)
window: Subject[_T] = Subject()
observer.on_next(add_ref(window, r))
def on_next(value: _T) -> None:
window.on_next(value)
def on_error(error: Exception) -> None:
window.on_error(error)
observer.on_error(error)
def on_completed() -> None:
window.on_completed()
observer.on_completed()
d.add(
source.subscribe(on_next,
on_error,
on_completed,
scheduler=scheduler))
def create_window_on_completed():
try:
window_close = closing_mapper()
except Exception as exception:
observer.on_error(exception)
return
def on_completed():
nonlocal window
window.on_completed()
window = Subject()
observer.on_next(add_ref(window, r))
create_window_on_completed()
m1 = SingleAssignmentDisposable()
m.disposable = m1
m1.disposable = window_close.pipe(ops.take(1)).subscribe(
noop, on_error, on_completed, scheduler=scheduler)
create_window_on_completed()
return r
def schedule_relative(
self,
duetime: typing.RelativeTime,
action: typing.ScheduledAction[_TState],
state: Optional[_TState] = None,
) -> abc.DisposableBase:
"""Schedules an action to be executed after duetime.
Args:
duetime: Relative time after which to execute the action.
action: Action to be executed.
state: [Optional] state to be given to the action function.
Returns:
The disposable object used to cancel the scheduled action
(best effort).
"""
seconds = max(0.0, self.to_seconds(duetime))
sad = SingleAssignmentDisposable()
def interval() -> None:
sad.disposable = action(self, state)
log.debug("timeout: %s", seconds)
timer = self._reactor.callLater(seconds, interval)
def dispose() -> None:
if not timer.called:
timer.cancel()
return CompositeDisposable(sad, Disposable(dispose))
def subscribe(
observer: abc.ObserverBase[_T],
scheduler: Optional[abc.SchedulerBase] = None
) -> abc.DisposableBase:
scheduler = scheduler or CurrentThreadScheduler.singleton()
subscription = SerialDisposable()
cancelable = SerialDisposable()
def action(scheduler: abc.SchedulerBase,
state: Optional[Exception] = None) -> None:
try:
source = next(sources_)
except StopIteration:
observer.on_completed()
return
# Allow source to be a factory method taking an error
source = source(state) if callable(source) else source
current = (reactivex.from_future(source) if isinstance(
source, Future) else source)
d = SingleAssignmentDisposable()
subscription.disposable = d
def on_resume(state: Optional[Exception] = None) -> None:
scheduler.schedule(action, state)
d.disposable = current.subscribe(observer.on_next,
on_resume,
on_resume,
scheduler=scheduler)
cancelable.disposable = scheduler.schedule(action)
return CompositeDisposable(subscription, cancelable)
def schedule(self,
action: typing.ScheduledAction[_TState],
state: Optional[_TState] = None) -> abc.DisposableBase:
"""Schedules an action to be executed.
Args:
action: Action to be executed.
state: [Optional] state to be given to the action function.
Returns:
The disposable object used to cancel the scheduled action
(best effort).
"""
sad = SingleAssignmentDisposable()
def interval() -> None:
sad.disposable = self.invoke_action(action, state=state)
handle = self._loop.call_soon_threadsafe(interval)
def dispose() -> None:
if self._on_self_loop_or_not_running():
handle.cancel()
return
future: "Future[int]" = Future()
def cancel_handle() -> None:
handle.cancel()
future.set_result(0)
self._loop.call_soon_threadsafe(cancel_handle)
future.result()
return CompositeDisposable(sad, Disposable(dispose))
def schedule(self,
action: typing.ScheduledAction[_TState],
state: Optional[_TState] = None) -> abc.DisposableBase:
"""Schedules an action to be executed.
Args:
action: Action to be executed.
state: [Optional] state to be given to the action function.
Returns:
The disposable object used to cancel the scheduled action
(best effort).
"""
sad = SingleAssignmentDisposable()
def interval() -> None:
sad.disposable = self.invoke_action(action, state=state)
timer = self._eventlet.spawn(interval)
def dispose() -> None:
timer.kill()
return CompositeDisposable(sad, Disposable(dispose))
def schedule_relative(
self,
duetime: typing.RelativeTime,
action: typing.ScheduledAction[_TState],
state: Optional[_TState] = None,
) -> abc.DisposableBase:
"""Schedules an action to be executed after duetime.
Args:
duetime: Relative time after which to execute the action.
action: Action to be executed.
state: [Optional] state to be given to the action function.
Returns:
The disposable object used to cancel the scheduled action
(best effort).
"""
msecs = max(0, int(self.to_seconds(duetime) * 1000.0))
sad = SingleAssignmentDisposable()
is_disposed = False
def invoke_action() -> None:
if not is_disposed:
sad.disposable = action(self, state)
log.debug("relative timeout: %sms", msecs)
# Use static method, let Qt C++ handle QTimer lifetime
self._qtcore.QTimer.singleShot(msecs, invoke_action)
def dispose() -> None:
nonlocal is_disposed
is_disposed = True
return CompositeDisposable(sad, Disposable(dispose))
def subscribe(
observer: abc.ObserverBase[_T],
scheduler_: Optional[abc.SchedulerBase] = None
) -> abc.DisposableBase:
_scheduler = scheduler or scheduler_ or CurrentThreadScheduler.singleton(
)
iterator = iter(iterable)
disposed = False
def action(_: abc.SchedulerBase, __: Any = None) -> None:
nonlocal disposed
try:
while not disposed:
value = next(iterator)
observer.on_next(value)
except StopIteration:
observer.on_completed()
except Exception as error: # pylint: disable=broad-except
observer.on_error(error)
def dispose() -> None:
nonlocal disposed
disposed = True
disp = Disposable(dispose)
return CompositeDisposable(_scheduler.schedule(action), disp)
def schedule(self,
action: typing.ScheduledAction[_TState],
state: Optional[_TState] = None) -> abc.DisposableBase:
"""Schedules an action to be executed.
Args:
action: Action to be executed.
state: [Optional] state to be given to the action function.
Returns:
The disposable object used to cancel the scheduled action
(best effort).
"""
sad = SingleAssignmentDisposable()
is_disposed = False
def invoke_action() -> None:
if not is_disposed:
sad.disposable = action(self, state)
self._wx.CallAfter(invoke_action)
def dispose() -> None:
nonlocal is_disposed
is_disposed = True
return CompositeDisposable(sad, Disposable(dispose))
def schedule_relative(
self,
duetime: typing.RelativeTime,
action: typing.ScheduledAction[_TState],
state: Optional[_TState] = None,
) -> abc.DisposableBase:
"""Schedules an action to be executed after duetime.
Args:
duetime: Relative time after which to execute the action.
action: Action to be executed.
state: [Optional] state to be given to the action function.
Returns:
The disposable object used to cancel the scheduled action
(best effort).
"""
sad = SingleAssignmentDisposable()
def invoke_action() -> None:
sad.disposable = self.invoke_action(action, state=state)
msecs = max(0, int(self.to_seconds(duetime) * 1000.0))
timer = self._root.after(msecs, invoke_action)
def dispose() -> None:
self._root.after_cancel(timer)
return CompositeDisposable(sad, Disposable(dispose))
def schedule_relative(
self,
duetime: typing.RelativeTime,
action: typing.ScheduledAction[_TState],
state: Optional[_TState] = None,
) -> abc.DisposableBase:
"""Schedules an action to be executed after duetime.
Args:
duetime: Relative time after which to execute the action.
action: Action to be executed.
state: [Optional] state to be given to the action function.
Returns:
The disposable object used to cancel the scheduled action
(best effort).
"""
seconds = self.to_seconds(duetime)
if seconds <= 0.0:
return self.schedule(action, state=state)
sad = SingleAssignmentDisposable()
def interval() -> None:
sad.disposable = self.invoke_action(action, state=state)
log.debug("timeout: %s", seconds)
timer = self._loop.call_later(seconds, interval)
def dispose() -> None:
self._loop.remove_timeout(timer)
self._loop.remove_timeout(timer)
return CompositeDisposable(sad, Disposable(dispose))
def subscribe(
observer: abc.ObserverBase[_T],
scheduler: Optional[abc.SchedulerBase] = None,
) -> abc.DisposableBase:
has_current = [False]
is_stopped = [False]
m = SingleAssignmentDisposable()
g = CompositeDisposable()
g.add(m)
def on_next(inner_source: Union[Observable[_T], "Future[_T]"]) -> None:
if not has_current[0]:
has_current[0] = True
inner_source = (
reactivex.from_future(inner_source)
if isinstance(inner_source, Future)
else inner_source
)
inner_subscription = SingleAssignmentDisposable()
g.add(inner_subscription)
def on_completed_inner():
g.remove(inner_subscription)
has_current[0] = False
if is_stopped[0] and len(g) == 1:
observer.on_completed()
inner_subscription.disposable = inner_source.subscribe(
observer.on_next,
observer.on_error,
on_completed_inner,
scheduler=scheduler,
)
def on_completed() -> None:
is_stopped[0] = True
if not has_current[0] and len(g) == 1:
observer.on_completed()
m.disposable = source.subscribe(
on_next, observer.on_error, on_completed, scheduler=scheduler
)
return g
def subscribe(
observer: abc.ObserverBase[_T],
scheduler_: Optional[abc.SchedulerBase] = None,
) -> abc.DisposableBase:
_scheduler = scheduler or scheduler_ or TimeoutScheduler.singleton(
)
switched = [False]
_id = [0]
original = SingleAssignmentDisposable()
subscription = SerialDisposable()
timer = SerialDisposable()
subscription.disposable = original
def create_timer() -> None:
my_id = _id[0]
def action(scheduler: abc.SchedulerBase, state: Any = None):
switched[0] = _id[0] == my_id
timer_wins = switched[0]
if timer_wins:
subscription.disposable = obs.subscribe(
observer, scheduler=scheduler)
if isinstance(duetime, datetime):
timer.disposable = _scheduler.schedule_absolute(
duetime, action)
else:
timer.disposable = _scheduler.schedule_relative(
duetime, action)
create_timer()
def on_next(value: _T) -> None:
send_wins = not switched[0]
if send_wins:
_id[0] += 1
observer.on_next(value)
create_timer()
def on_error(error: Exception) -> None:
on_error_wins = not switched[0]
if on_error_wins:
_id[0] += 1
observer.on_error(error)
def on_completed() -> None:
on_completed_wins = not switched[0]
if on_completed_wins:
_id[0] += 1
observer.on_completed()
original.disposable = source.subscribe(on_next,
on_error,
on_completed,
scheduler=scheduler_)
return CompositeDisposable(subscription, timer)
def schedule_relative(
self,
duetime: typing.RelativeTime,
action: typing.ScheduledAction[_TState],
state: Optional[_TState] = None,
) -> abc.DisposableBase:
"""Schedules an action to be executed after duetime.
Args:
duetime: Relative time after which to execute the action.
action: Action to be executed.
state: [Optional] state to be given to the action function.
Returns:
The disposable object used to cancel the scheduled action
(best effort).
"""
seconds = self.to_seconds(duetime)
if seconds <= 0:
return self.schedule(action, state=state)
sad = SingleAssignmentDisposable()
def interval() -> None:
sad.disposable = self.invoke_action(action, state=state)
# the operations on the list used here are atomic, so there is no
# need to protect its access with a lock
handle: List[asyncio.Handle] = []
def stage2() -> None:
handle.append(self._loop.call_later(seconds, interval))
handle.append(self._loop.call_soon_threadsafe(stage2))
def dispose() -> None:
def do_cancel_handles() -> None:
try:
handle.pop().cancel()
handle.pop().cancel()
except Exception:
pass
if self._on_self_loop_or_not_running():
do_cancel_handles()
return
future: "Future[int]" = Future()
def cancel_handle() -> None:
do_cancel_handles()
future.set_result(0)
self._loop.call_soon_threadsafe(cancel_handle)
future.result()
return CompositeDisposable(sad, Disposable(dispose))
def subscribe(
observer: abc.ObserverBase[_T],
scheduler: Optional[abc.SchedulerBase] = None,
) -> abc.DisposableBase:
return CompositeDisposable(
merged_disposable.disposable
if merged_disposable else Disposable(),
underlying_observable.subscribe(observer, scheduler=scheduler),
)
def subscribe(
observer: abc.ObserverBase[_T],
scheduler: Optional[abc.SchedulerBase] = None
) -> abc.DisposableBase:
disp: abc.DisposableBase = Disposable()
try:
resource = resource_factory()
if resource is not None:
disp = resource
source = observable_factory(resource)
except Exception as exception: # pylint: disable=broad-except
d = reactivex.throw(exception).subscribe(observer,
scheduler=scheduler)
return CompositeDisposable(d, disp)
return CompositeDisposable(
source.subscribe(observer, scheduler=scheduler), disp)
def subscribe(
observer: abc.ObserverBase[Any],
scheduler: Optional[abc.SchedulerBase] = None
) -> CompositeDisposable:
n = len(sources)
queues: List[List[Any]] = [[] for _ in range(n)]
lock = RLock()
is_completed = [False] * n
@synchronized(lock)
def next_(i: int) -> None:
if all(len(q) for q in queues):
try:
queued_values = [x.pop(0) for x in queues]
res = tuple(queued_values)
except Exception as ex: # pylint: disable=broad-except
observer.on_error(ex)
return
observer.on_next(res)
# after sending the zipped values, complete the observer if at least one
# upstream observable is completed and its queue has length zero
if any((done for queue, done in zip(queues, is_completed)
if len(queue) == 0)):
observer.on_completed()
def completed(i: int) -> None:
is_completed[i] = True
if len(queues[i]) == 0:
observer.on_completed()
subscriptions: List[Optional[abc.DisposableBase]] = [None] * n
def func(i: int) -> None:
source: Observable[Any] = sources[i]
if isinstance(source, Future):
source = from_future(source)
sad = SingleAssignmentDisposable()
def on_next(x: Any) -> None:
queues[i].append(x)
next_(i)
sad.disposable = source.subscribe(on_next,
observer.on_error,
lambda: completed(i),
scheduler=scheduler)
subscriptions[i] = sad
for idx in range(n):
func(idx)
return CompositeDisposable(subscriptions)
def subscribe(
observer: abc.ObserverBase[_T],
scheduler: Optional[abc.SchedulerBase] = None,
):
group = CompositeDisposable()
is_stopped = [False]
m = SingleAssignmentDisposable()
group.add(m)
def on_next(inner_source: Union[Observable[_T], "Future[_T]"]):
inner_subscription = SingleAssignmentDisposable()
group.add(inner_subscription)
inner_source = (from_future(inner_source) if isinstance(
inner_source, Future) else inner_source)
@synchronized(source.lock)
def on_completed():
group.remove(inner_subscription)
if is_stopped[0] and len(group) == 1:
observer.on_completed()
on_next: typing.OnNext[_T] = synchronized(source.lock)(
observer.on_next)
on_error = synchronized(source.lock)(observer.on_error)
subscription = inner_source.subscribe(on_next,
on_error,
on_completed,
scheduler=scheduler)
inner_subscription.disposable = subscription
def on_completed():
is_stopped[0] = True
if len(group) == 1:
observer.on_completed()
m.disposable = source.subscribe(on_next,
observer.on_error,
on_completed,
scheduler=scheduler)
return group
def test_groupdisposable_clear():
disp1 = [False]
disp2 = [False]
def action1():
disp1[0] = True
d1 = Disposable(action1)
def action2():
disp2[0] = True
d2 = Disposable(action2)
g = CompositeDisposable(d1, d2)
assert g.length == 2
g.clear()
assert disp1[0]
assert disp2[0]
assert not g.length
disp3 = [False]
def action3():
disp3[0] = True
d3 = Disposable(action3)
g.add(d3)
assert not disp3[0]
assert g.length == 1
def subscribe(
observer: abc.ObserverBase[_T],
scheduler: Optional[abc.SchedulerBase] = None,
) -> abc.DisposableBase:
was_invoked = [False]
def on_completed():
observer.on_completed()
try:
if not was_invoked[0]:
finally_action()
was_invoked[0] = True
except Exception as err: # pylint: disable=broad-except
observer.on_error(err)
def on_error(exception: Exception):
observer.on_error(exception)
try:
if not was_invoked[0]:
finally_action()
was_invoked[0] = True
except Exception as err: # pylint: disable=broad-except
observer.on_error(err)
composite_disposable = CompositeDisposable()
composite_disposable.add(OnDispose(was_invoked))
subscription = source.subscribe(observer.on_next,
on_error,
on_completed,
scheduler=scheduler)
composite_disposable.add(subscription)
return composite_disposable
def subscribe(
observer: abc.ObserverBase[_T],
scheduler: Optional[abc.SchedulerBase] = None,
) -> abc.DisposableBase:
inner_subscription = SerialDisposable()
has_latest = [False]
is_stopped = [False]
latest = [0]
def on_next(inner_source: Union[Observable[_T], "Future[_T]"]) -> None:
nonlocal source
d = SingleAssignmentDisposable()
with source.lock:
latest[0] += 1
_id = latest[0]
has_latest[0] = True
inner_subscription.disposable = d
# Check if Future or Observable
if isinstance(inner_source, Future):
obs = from_future(inner_source)
else:
obs = inner_source
def on_next(x: Any) -> None:
if latest[0] == _id:
observer.on_next(x)
def on_error(e: Exception) -> None:
if latest[0] == _id:
observer.on_error(e)
def on_completed() -> None:
if latest[0] == _id:
has_latest[0] = False
if is_stopped[0]:
observer.on_completed()
d.disposable = obs.subscribe(
on_next, on_error, on_completed, scheduler=scheduler
)
def on_completed() -> None:
is_stopped[0] = True
if not has_latest[0]:
observer.on_completed()
subscription = source.subscribe(
on_next, observer.on_error, on_completed, scheduler=scheduler
)
return CompositeDisposable(subscription, inner_subscription)
def subscribe(
observer: abc.ObserverBase[Any],
scheduler: Optional[abc.SchedulerBase] = None
) -> CompositeDisposable:
n = len(sources)
has_value = [False] * n
has_value_all = [False]
is_done = [False] * n
values = [None] * n
def _next(i: Any) -> None:
has_value[i] = True
if has_value_all[0] or all(has_value):
res = tuple(values)
observer.on_next(res)
elif all([x for j, x in enumerate(is_done) if j != i]):
observer.on_completed()
has_value_all[0] = all(has_value)
def done(i: Any) -> None:
is_done[i] = True
if all(is_done):
observer.on_completed()
subscriptions: List[Optional[SingleAssignmentDisposable]] = [None] * n
def func(i: int) -> None:
subscriptions[i] = SingleAssignmentDisposable()
def on_next(x: Any) -> None:
with parent.lock:
values[i] = x
_next(i)
def on_completed() -> None:
with parent.lock:
done(i)
subscription = subscriptions[i]
assert subscription
subscription.disposable = sources[i].subscribe(on_next,
observer.on_error,
on_completed,
scheduler=scheduler)
for idx in range(n):
func(idx)
return CompositeDisposable(subscriptions)
def subscribe(
observer: abc.ObserverBase[_TResult],
scheduler: Optional[abc.SchedulerBase] = None,
) -> abc.DisposableBase:
assert subject_factory
connectable = source.pipe(
ops.multicast(subject=subject_factory(scheduler)))
assert mapper
subscription = mapper(connectable).subscribe(
observer, scheduler=scheduler)
return CompositeDisposable(subscription,
connectable.connect(scheduler))
def subscribe(
observer: abc.ObserverBase[_T],
scheduler: Optional[abc.SchedulerBase] = None,
) -> abc.DisposableBase:
def on_completed(_: _T) -> None:
observer.on_completed()
return CompositeDisposable(
source.subscribe(observer, scheduler=scheduler),
obs.subscribe(
on_completed, observer.on_error, noop, scheduler=scheduler
),
)
def subscribe(
observer: abc.ObserverBase[_T],
scheduler_: Optional[abc.SchedulerBase] = None,
) -> abc.DisposableBase:
_scheduler = scheduler or scheduler_ or TimeoutScheduler.singleton()
def action(scheduler: abc.SchedulerBase, state: Any = None):
observer.on_completed()
disp = _scheduler.schedule_relative(duration, action)
return CompositeDisposable(
disp, source.subscribe(observer, scheduler=scheduler_)
)
def subscribe(
observer: abc.ObserverBase[_T],
scheduler_: Optional[abc.SchedulerBase] = None,
) -> abc.DisposableBase:
_scheduler = scheduler or scheduler_ or TimeoutScheduler.singleton(
)
cancelable = SerialDisposable()
has_value = [False]
value: List[_T] = [cast(_T, None)]
_id: List[int] = [0]
def on_next(x: _T) -> None:
has_value[0] = True
value[0] = x
_id[0] += 1
current_id = _id[0]
d = SingleAssignmentDisposable()
cancelable.disposable = d
def action(scheduler: abc.SchedulerBase,
state: Any = None) -> None:
if has_value[0] and _id[0] == current_id:
observer.on_next(value[0])
has_value[0] = False
d.disposable = _scheduler.schedule_relative(duetime, action)
def on_error(exception: Exception) -> None:
cancelable.dispose()
observer.on_error(exception)
has_value[0] = False
_id[0] += 1
def on_completed() -> None:
cancelable.dispose()
if has_value[0]:
observer.on_next(value[0])
observer.on_completed()
has_value[0] = False
_id[0] += 1
subscription = source.subscribe(on_next,
on_error,
on_completed,
scheduler=scheduler_)
return CompositeDisposable(subscription, cancelable)
