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from typing import Any, Callable, Optional, TypeVar
from reactivex import Observable, abc
from reactivex.disposable import (
ScheduledDisposable,
SerialDisposable,
SingleAssignmentDisposable,
)
_T = TypeVar("_T")
def subscribe_on_(
scheduler: abc.SchedulerBase,
) -> Callable[[Observable[_T]], Observable[_T]]:
def subscribe_on(source: Observable[_T]) -> Observable[_T]:
"""Subscribe on the specified scheduler.
Wrap the source sequence in order to run its subscription and
unsubscription logic on the specified scheduler. This operation
is not commonly used; see the remarks section for more
information on the distinction between subscribe_on and
observe_on.
This only performs the side-effects of subscription and
unsubscription on the specified scheduler. In order to invoke
observer callbacks on a scheduler, use observe_on.
Args:
source: The source observable..
Returns:
The source sequence whose subscriptions and
un-subscriptions happen on the specified scheduler.
"""
def subscribe(
observer: abc.ObserverBase[_T], _: Optional[abc.SchedulerBase] = None
):
m = SingleAssignmentDisposable()
d = SerialDisposable()
d.disposable = m
def action(scheduler: abc.SchedulerBase, state: Optional[Any] = None):
d.disposable = ScheduledDisposable(
scheduler, source.subscribe(observer)
)
m.disposable = scheduler.schedule(action)
return d
return Observable(subscribe)
return subscribe_on
__all__ = ["subscribe_on_"]
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