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from typing import Callable, Optional, TypeVar
from reactivex import Observable, abc
from reactivex.observer import ObserveOnObserver
_T = TypeVar("_T")
def observe_on_(
scheduler: abc.SchedulerBase,
) -> Callable[[Observable[_T]], Observable[_T]]:
def observe_on(source: Observable[_T]) -> Observable[_T]:
"""Wraps the source sequence in order to run its observer
callbacks on the specified scheduler.
This only invokes observer callbacks on a scheduler. In case
the subscription and/or unsubscription actions have
side-effects that require to be run on a scheduler, use
subscribe_on.
Args:
source: Source observable.
Returns:
Returns the source sequence whose observations happen on
the specified scheduler.
"""
def subscribe(
observer: abc.ObserverBase[_T],
subscribe_scheduler: Optional[abc.SchedulerBase] = None,
):
return source.subscribe(
ObserveOnObserver(scheduler, observer), scheduler=subscribe_scheduler
)
return Observable(subscribe)
return observe_on
__all__ = ["observe_on_"]
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