def subscribe(
observer: typing.Observer,
scheduler_: Optional[typing.Scheduler] = None
) -> typing.Disposable:
_scheduler = scheduler or scheduler_ or CurrentThreadScheduler.singleton(
)
iterator = iter(iterable)
disposed = False
def action(_: typing.Scheduler, __: 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 subscribe(observer, scheduler=None):
scheduler = scheduler or CurrentThreadScheduler.singleton()
first = True
state = initial_state
mad = MultipleAssignmentDisposable()
def action(scheduler, state1=None):
nonlocal first
nonlocal state
has_result = False
result = None
try:
if first:
first = False
else:
state = iterate(state)
has_result = condition(state)
if has_result:
result = state
except Exception as exception: # pylint: disable=broad-except
observer.on_error(exception)
return
if has_result:
observer.on_next(result)
mad.disposable = scheduler.schedule(action)
else:
observer.on_completed()
mad.disposable = scheduler.schedule(action)
return mad
def subscribe(observer, scheduler=None):
scheduler = scheduler or CurrentThreadScheduler.singleton()
subscription = SerialDisposable()
cancelable = SerialDisposable()
def action(scheduler, state=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 = rx.from_future(source) if is_future(source) else source
d = SingleAssignmentDisposable()
subscription.disposable = d
def on_resume(state=None):
scheduler.schedule(action, state)
d.disposable = current.subscribe_(observer.on_next, on_resume,
on_resume, scheduler)
cancelable.disposable = scheduler.schedule(action)
return CompositeDisposable(subscription, cancelable)
def subscribe(
observer: typing.Observer,
scheduler_: Optional[typing.Scheduler] = None
) -> typing.Disposable:
_scheduler = scheduler or scheduler_ or CurrentThreadScheduler.singleton(
)
def action(scheduler: typing.Scheduler, state: Any = None):
observer.on_next(value)
observer.on_completed()
return _scheduler.schedule(action)
def test_currentthread_extend(self):
class MyScheduler(CurrentThreadScheduler):
pass
scheduler = [
MyScheduler(),
MyScheduler.singleton(),
MyScheduler.singleton(),
CurrentThreadScheduler.singleton(),
]
assert scheduler[0] is not scheduler[1]
assert scheduler[1] is scheduler[2]
assert scheduler[1] is not scheduler[3]
def test_currentthread_singleton(self):
scheduler = [
CurrentThreadScheduler(),
CurrentThreadScheduler.singleton(),
CurrentThreadScheduler.singleton()
]
assert scheduler[0] is not scheduler[1]
assert scheduler[1] is scheduler[2]
gate = [threading.Semaphore(0), threading.Semaphore(0)]
scheduler = [None, None]
def run(idx):
scheduler[idx] = CurrentThreadScheduler.singleton()
gate[idx].release()
for idx in (0, 1):
threading.Thread(target=run, args=(idx, )).start()
gate[idx].acquire()
assert scheduler[0] is not None
assert scheduler[1] is not None
assert scheduler[0] is not scheduler[1]
def subscribe(observer: typing.Observer,
scheduler_: typing.Scheduler = None):
_scheduler = scheduler or scheduler_ or CurrentThreadScheduler.singleton(
)
def action(_: Scheduler, __: Any = None):
nonlocal observer
try:
observer.on_next(supplier())
observer.on_completed()
except Exception as e: # pylint: disable=broad-except
observer.on_error(e)
return _scheduler.schedule(action)
def subscribe(observer, scheduler_: typing.Scheduler = None):
nonlocal range_t
_scheduler = scheduler or scheduler_ or CurrentThreadScheduler.singleton(
)
sd = MultipleAssignmentDisposable()
def action(scheduler, iterator):
try:
observer.on_next(next(iterator))
sd.disposable = _scheduler.schedule(action, state=iterator)
except StopIteration:
observer.on_completed()
sd.disposable = _scheduler.schedule(action, iter(range_t))
return sd
def subscribe(observer, scheduler):
scheduler = scheduler or CurrentThreadScheduler.singleton()
def action(scheduler, state):
self.task()
def dispose() -> None:
import traceback
traceback.print_stack()
print("--------> dispose called <----------------")
# nonlocal disposed
# disposed = True
# scheduler.schedule(action)
return CompositeDisposable(scheduler.schedule(action),
Disposable(dispose))
def subscribe(observer: ObserverType,
scheduler: Optional[SchedulerType] = None) -> DisposableType:
# _scheduler = scheduler or scheduler_ or CurrentThreadScheduler.singleton()
scheduler = scheduler or CurrentThreadScheduler.singleton()
# iterator = iter(iterable)
disposed = False
def action(_: SchedulerType, __: Any = None) -> None:
nonlocal disposed
print("logoutTask/subscribe", threading.currentThread())
print("a")
observer.on_next("Started")
print("b")
observer.on_next("Started 2")
print("c")
print("calling on_next")
time.sleep(0.2)
if disposed:
pass
print("d")
observer.on_next("Logging out...")
time.sleep(1)
print("e")
observer.on_next("Almost done")
time.sleep(1)
# raise Exception("Gnit happened")
observer.on_completed()
def dispose() -> None:
import traceback
traceback.print_stack()
print("--------> dispose called <----------------")
nonlocal disposed
disposed = True
disp = Disposable(dispose)
return CompositeDisposable(scheduler.schedule(action), disp)
def __init__(self,
buffer_size: int = None,
window: typing.RelativeTime = None,
scheduler: Optional[typing.Scheduler] = None
) -> None:
"""Initializes a new instance of the ReplaySubject class with
the specified buffer size, window and scheduler.
Args:
buffer_size: [Optional] Maximum element count of the replay
buffer.
window [Optional]: Maximum time length of the replay buffer.
scheduler: [Optional] Scheduler the observers are invoked on.
"""
super().__init__()
self.buffer_size = sys.maxsize if buffer_size is None else buffer_size
self.scheduler = scheduler or CurrentThreadScheduler.singleton()
self.window = timedelta.max if window is None else self.scheduler.to_timedelta(window)
self.queue: List[QueueItem] = []
def subscribe(observer, scheduler_=None):
_scheduler = scheduler_ or CurrentThreadScheduler.singleton()
subscription = SerialDisposable()
cancelable = SerialDisposable()
last_exception = None
is_disposed = False
def action(action1, state=None):
def on_error(exn):
nonlocal last_exception
last_exception = exn
cancelable.disposable = _scheduler.schedule(action)
if is_disposed:
return
try:
current = next(sources_)
except StopIteration:
if last_exception:
observer.on_error(last_exception)
else:
observer.on_completed()
except Exception as ex: # pylint: disable=broad-except
observer.on_error(ex)
else:
d = SingleAssignmentDisposable()
subscription.disposable = d
d.disposable = current.subscribe_(observer.on_next, on_error,
observer.on_completed,
scheduler_)
cancelable.disposable = _scheduler.schedule(action)
def dispose():
nonlocal is_disposed
is_disposed = True
return CompositeDisposable(subscription, cancelable,
Disposable(dispose))
def test_currentthread_singleton_schedule_nested_order(self):
scheduler = CurrentThreadScheduler.singleton()
tests = []
def outer(scheduler, state=None):
def action1(scheduler, state=None):
tests.append(1)
def action2(scheduler, state=None):
tests.append(2)
scheduler.schedule(action2)
scheduler.schedule(action1)
def action3(scheduler, state=None):
tests.append(3)
scheduler.schedule(action3)
scheduler.ensure_trampoline(outer)
assert tests == [1, 3, 2]
def on_subscribe(observer, scheduler_):
disposed = False
_scheduler = scheduler_ or CurrentThreadScheduler.singleton()
def _action(_, __):
nonlocal disposed
def read_data(f):
nonlocal disposed
if size is None:
data = f.read(size)
observer.on_next(data)
else:
data = f.read(size)
while not disposed and len(data) > 0:
observer.on_next(data)
data = f.read(size)
try:
if type(file) is str:
with open(file, mode, encoding=encoding) as f:
read_data(f)
else:
read_data(file)
observer.on_completed()
except Exception as e:
observer.on_error(e)
def _dispose():
nonlocal disposed
disposed = True
disp = Disposable(_dispose)
return CompositeDisposable(_scheduler.schedule(_action), disp)
def run(idx):
scheduler[idx] = CurrentThreadScheduler.singleton()
gate[idx].release()
def subscribe_(
self,
on_next: Optional[typing.OnNext] = None,
on_error: Optional[typing.OnError] = None,
on_completed: Optional[typing.OnCompleted] = None,
scheduler: Optional[typing.Scheduler] = None) -> typing.Disposable:
"""Subscribe callbacks to the observable sequence.
Examples:
>>> source.subscribe_(on_next)
>>> source.subscribe_(on_next, on_error)
>>> source.subscribe_(on_next, on_error, on_completed)
Args:
on_next: [Optional] Action to invoke for each element in the
observable sequence.
on_error: [Optional] Action to invoke upon exceptional termination
of the observable sequence.
on_completed: [Optional] Action to invoke upon graceful termination
of the observable sequence.
scheduler: [Optional] The scheduler to use for this subscription.
Returns:
Disposable object representing an observer's subscription to
the observable sequence.
"""
auto_detach_observer = AutoDetachObserver(on_next, on_error,
on_completed)
def fix_subscriber(subscriber):
"""Fixes subscriber to make sure it returns a Disposable instead
of None or a dispose function"""
if not hasattr(subscriber, 'dispose'):
subscriber = Disposable(subscriber)
return subscriber
def set_disposable(_: abc.Scheduler = None, __: Any = None):
try:
subscriber = self._subscribe_core(auto_detach_observer,
scheduler)
except Exception as ex: # By design. pylint: disable=W0703
if not auto_detach_observer.fail(ex):
raise
else:
auto_detach_observer.subscription = fix_subscriber(subscriber)
# Subscribe needs to set up the trampoline before for subscribing.
# Actually, the first call to Subscribe creates the trampoline so
# that it may assign its disposable before any observer executes
# OnNext over the CurrentThreadScheduler. This enables single-
# threaded cancellation
# https://social.msdn.microsoft.com/Forums/en-US/eb82f593-9684-4e27-
# 97b9-8b8886da5c33/whats-the-rationale-behind-how-currentthreadsche
# dulerschedulerequired-behaves?forum=rx
current_thread_scheduler = CurrentThreadScheduler.singleton()
if current_thread_scheduler.schedule_required():
current_thread_scheduler.schedule(set_disposable)
else:
set_disposable()
# Hide the identity of the auto detach observer
return Disposable(auto_detach_observer.dispose)