def observe(self, observer_info: ObserverInfo):
self.observer = observer_info.observer
class ZipLeftObserver(Observer):
def on_next(_, elem: ElementType) -> Ack:
return self._on_next_left(elem)
def on_error(_, exc: Exception):
self._on_error(exc)
def on_completed(_):
self._on_completed_left()
class ZipRightObserver(Observer):
def on_next(_, elem: ElementType) -> Ack:
return self._on_next_right(elem)
def on_error(_, exc: Exception):
self._on_error(exc)
def on_completed(_):
self._on_completed_right()
left_observer = ZipLeftObserver()
left_subscription = observer_info.copy(observer=left_observer, )
d1 = self.left.observe(left_subscription)
right_observer = ZipRightObserver()
right_subscription = observer_info.copy(observer=right_observer, )
d2 = self.right.observe(right_subscription)
return CompositeDisposable(d1, d2)
def observe(self, observer_info: ObserverInfo):
"""
sources[0] ------------------------> Subject --
\
sources[1] -> ConnectableObserver -> Subject -----> ConcatObserver
... /
sources[n] -> ConnectableObserver -> Subject --
"""
conn_observers = [
ConnectableObserver(underlying=subject, )
for subject in self.subjects[1:]
]
connectables = iter(conn_observers)
concat_observer = ConcatObserver(next_observer=observer_info.observer,
connectables=connectables)
concat_observer_info = observer_info.copy(observer=concat_observer, )
for subject in self.subjects:
subject.observe(concat_observer_info)
def gen_disposable_from_observer():
for source, conn_observer in zip(self.sources[1:], conn_observers):
yield source.observe(
observer_info.copy(observer=conn_observer, ))
others_disposables = gen_disposable_from_observer()
first_disposable = self.sources[0].observe(
observer_info.copy(observer=self.subjects[0], ))
return CompositeDisposable(first_disposable, *others_disposables)
def observe(self, observer_info: ObserverInfo):
return self.source.observe(
observer_info=observer_info.copy(observer=RepeatFirstObserver(
next_observer=observer_info.observer,
scheduler=self.scheduler,
))
)
def observe(self, observer_info: ObserverInfo):
return self.source.observe(observer_info.copy(
observer=MapObserver(
source=observer_info.observer,
func=self.func,
),
))
def observe(self, observer_info: ObserverInfo):
subscription = observer_info.copy(observer=IndexedFilterObserver(
observer=observer_info.observer,
predicate=self.predicate,
selector_subject=self.selector_subject,
), )
return self.source.observe(subscription)
def observe(self, observer_info: ObserverInfo):
self.on_observe(observer_info)
if self.subscriber.subscribe_scheduler.idle:
raise Exception(
to_operator_exception(
message=
'observe method call should be scheduled on subscribe scheduler',
stack=self.stack,
))
observer = DebugObserver(
source=observer_info.observer,
name=self.name,
on_next_func=self.on_next,
on_completed_func=self.on_completed,
on_error_func=self.on_error,
on_sync_ack=self.on_sync_ack,
on_async_ack=self.on_async_ack,
on_raw_ack=self.on_raw_ack,
stack=self.stack,
)
# def action(_, __):
# observer.has_scheduled_next = True
# self.subscriber.subscribe_scheduler.schedule(action)
return self.source.observe(observer_info.copy(observer=observer, ))
def observe(self, observer_info: ObserverInfo):
first_observer = DefaultIfEmptyObserver(
next_observer=observer_info.observer,
lazy_val=self.lazy_val,
)
map_subscription = observer_info.copy(observer=first_observer)
return self.source.observe(map_subscription)
def observe(self, observer_info: ObserverInfo):
next_observer_info = observer_info.copy(
observer=TakeWhileObserver(
observer=observer_info.observer,
predicate=self.predicate,
),
)
return self.source.observe(next_observer_info)
def observe(self, observer_info: ObserverInfo):
return self.source.observe(
observer_info.copy(observer=BufferedObserver(
underlying=observer_info.observer,
scheduler=self.scheduler,
subscribe_scheduler=self.subscribe_scheduler,
buffer_size=self.buffer_size,
), ))
def observe(self, observer_info: ObserverInfo):
func = self.func
map_subscription = observer_info.copy(observer=MapToIteratorObserver(
source=observer_info.observer,
func=func,
), )
return self.source.observe(map_subscription)
def observe(self, observer_info: ObserverInfo):
return self.source.observe(observer_info.copy(
observer=ScanObserver(
observer=observer_info.observer,
func=self.func,
initial=self.initial,
),
))
def observe(self, observer_info: ObserverInfo) -> Disposable:
observer = EvictingBufferedObserver(
observer=observer_info.observer,
scheduler=self.scheduler,
subscribe_scheduler=self.subscribe_scheduler,
strategy=self.overflow_strategy,
)
return self.source.observe(observer_info.copy(observer=observer, ))
def observe(self, observer_info: ObserverInfo):
if self.on_error is not None:
def on_error(exc):
self.on_error(exc)
return observer_info.observer.on_error(exc)
else:
on_error = observer_info.observer.on_error
if self.on_completed is not None:
def on_completed():
self.on_completed()
return observer_info.observer.on_completed()
else:
on_completed = observer_info.observer.on_completed
if self.on_next is not None:
def on_next(val):
if not isinstance(val, list):
try:
val = list(val)
except Exception as exc:
on_error(exc)
return stop_ack
for item in val:
self.on_next(item)
return observer_info.observer.on_next(val)
else:
on_next = observer_info.observer.on_next
observer = type(
'DoActionObserver',
(Observer, object),
{
'on_next': on_next,
'on_completed': on_completed,
'on_error': on_error
},
)
disposable = self.source.observe(
observer_info=observer_info.copy(observer=observer), )
if self.on_disposed is None:
return disposable
else:
return CompositeDisposable(disposable,
Disposable(self.on_disposed))
def test_use_case(self):
sink = TObserver(immediate_continue=0)
subscription = rxbp.from_range(1, 4).unsafe_subscribe(
Subscriber(scheduler=self.scheduler,
subscribe_scheduler=self.scheduler))
subscription.observable.observe(ObserverInfo(observer=sink))
self.scheduler.advance_by(1)
self.assertEqual([1, 2, 3], sink.received)
self.assertTrue(sink.is_completed)
def observe(self, observer_info: ObserverInfo):
""" This function ought be called at most once.
:param observer_info: downstream obseNonerver
:return: Disposable
"""
self.observer = observer_info.observer
source = self
class LeftControlledZipObserver(Observer):
def on_next(self, elem: ElementType) -> Ack:
return source._on_next_left(elem)
def on_error(self, exc: Exception):
return source._on_error(exc)
def on_completed(self):
source._on_completed_left()
class RightControlledZipObserver(Observer):
def on_next(self, elem: ElementType) -> Ack:
return source._on_next_right(elem)
def on_error(self, exc: Exception):
return source._on_error(exc)
def on_completed(self):
source._on_completed_right()
left_observer = LeftControlledZipObserver()
left_subscription = observer_info.copy(observer=left_observer)
d1 = self.left_observable.observe(left_subscription)
right_observer = RightControlledZipObserver()
left_subscription = observer_info.copy(observer=right_observer)
d2 = self.right_observable.observe(left_subscription)
return CompositeDisposable(d1, d2)
def observe(self, observer_info: ObserverInfo):
""" This function ought be called at most once.
:param observer_info: downstream obseNonerver
:return: Disposable
"""
self.observer = observer_info.observer
outer_self = self
class LeftControlledZipObserver(Observer):
def on_next(self, elem: ElementType) -> Ack:
return outer_self._iterate_over_batch(elem=elem, is_left=True)
def on_error(self, exc: Exception):
return outer_self._on_error(exc)
def on_completed(self):
outer_self._on_completed_left()
class RightControlledZipObserver(Observer):
def on_next(self, elem: ElementType) -> Ack:
return outer_self._iterate_over_batch(elem=elem, is_left=False)
def on_error(self, exc: Exception):
return outer_self._on_error(exc)
def on_completed(self):
outer_self._on_completed_right()
left_observer = LeftControlledZipObserver()
left_subscription = observer_info.copy(observer=left_observer, )
d1 = self.left.observe(left_subscription)
right_observer = RightControlledZipObserver()
left_subscription = observer_info.copy(observer=right_observer, )
d2 = self.right.observe(left_subscription)
return CompositeDisposable(d1, d2)
def observe(self, observer_info: ObserverInfo):
composite_disposable = CompositeDisposable()
disposable = self.source.observe(
observer_info.copy(observer=FlatMapObserver(
observer_info=observer_info,
func=self.func,
scheduler=self.scheduler,
subscribe_scheduler=self.subscribe_scheduler,
composite_disposable=composite_disposable,
)), )
composite_disposable.add(disposable)
return composite_disposable
def observe(self, observer_info: ObserverInfo):
composite_disposable = CompositeDisposable()
disposable = self.source.observe(
observer_info.copy(observer=FlatMergeNoBackpressureObserver(
observer=observer_info.observer,
selector=self.selector,
scheduler=self.scheduler,
subscribe_scheduler=self.subscribe_scheduler,
composite_disposable=composite_disposable,
), ))
composite_disposable.add(disposable)
return composite_disposable
def observe(self, observer_info: ObserverInfo):
self.observer = observer_info.observer
source = self
class LeftObserver(Observer):
def on_next(self, elem: ElementType):
next_state = RawMergeStates.OnLeftReceived(elem=elem,
ack=AckSubject())
return source._on_next(next_state)
def on_error(self, exc):
source._on_error(exc)
def on_completed(self):
source._on_completed_left()
class RightObserver(Observer):
def on_next(self, elem: ElementType):
next_state = RawMergeStates.OnRightReceived(elem=elem,
ack=AckSubject())
return source._on_next(next_state)
def on_error(self, exc):
source._on_error(exc)
def on_completed(self):
source._on_completed_right()
left_observer = LeftObserver()
left_subscription = observer_info.copy(observer=left_observer)
d1 = self.left.observe(left_subscription)
right_observer = RightObserver()
right_subscription = observer_info.copy(observer=right_observer)
d2 = self.right.observe(right_subscription)
return CompositeDisposable(d1, d2)
def test_from_list_batch_size_of_two(self):
sink = TObserver(immediate_continue=0)
subscription = rxbp.from_range(1, 4, batch_size=2).unsafe_subscribe(
Subscriber(scheduler=self.scheduler,
subscribe_scheduler=self.scheduler))
subscription.observable.observe(ObserverInfo(observer=sink))
self.scheduler.advance_by(1)
self.assertEqual([1, 2], sink.received)
sink.ack.on_next(continue_ack)
self.scheduler.advance_by(1)
self.assertEqual([1, 2, 3], sink.received)
self.assertTrue(sink.is_completed)
def test_from_list_batch_size_of_one(self):
test_list = [1, 2, 3]
sink = TObserver(immediate_continue=0)
subscription = rxbp.from_list(
test_list, batch_size=1).unsafe_subscribe(
Subscriber(scheduler=self.scheduler,
subscribe_scheduler=self.scheduler))
subscription.observable.observe(ObserverInfo(observer=sink))
self.scheduler.advance_by(1)
self.assertEqual(test_list[:1], sink.received)
self.assertFalse(sink.is_completed)
sink.ack.on_next(continue_ack)
self.scheduler.advance_by(1)
self.assertEqual(test_list[:2], sink.received)
def observe(self, observer_info: ObserverInfo):
@dataclass
class MaterializeObserver(Observer):
source: Observer
def on_next(self, elem: ElementType) -> Ack:
if not isinstance(elem, list):
elem = list(elem)
return self.source.on_next(elem)
def on_error(self, exc: Exception):
return self.source.on_error(exc)
def on_completed(self):
return self.source.on_completed()
return self.source.observe(
observer_info.copy(observer=MaterializeObserver(
source=observer_info.observer, ), ))
def observe(self, observer_info: ObserverInfo):
class ToListObserver(Observer):
def __init__(
self,
func: Callable[[Any, Any], Any],
initial: Any,
):
self.func = func
self.acc = initial
def on_next(self, elem: ElementType):
try:
if isinstance(elem, list):
materialized_values = elem
else:
materialized_values = list(elem)
for value in materialized_values:
self.acc = self.func(self.acc, value)
except Exception as exc:
self.on_error(exc)
return stop_ack
return continue_ack
def on_error(self, exc):
return observer_info.observer.on_error(exc)
def on_completed(self):
_ = observer_info.observer.on_next([self.acc])
observer_info.observer.on_completed()
return self.source.observe(
observer_info.copy(observer=ToListObserver(
func=self.func,
initial=self.initial,
), ))
def observe(self, observer_info: ObserverInfo) -> Disposable:
observer_info = observer_info.observer
class IdentityObserver(Observer):
def on_next(self, elem: ElementType):
def gen_select_msg():
for _ in elem:
yield select_next
yield select_completed
# val = list(gen_select_msg())
# ack = observer_info.on_next(val)
ack = observer_info.on_next(gen_select_msg())
return ack
def on_error(self, exc: Exception):
observer_info.on_next(exc)
def on_completed(self):
observer_info.on_completed()
self._source.observe(observer_info.copy(observer=IdentityObserver(), ))
def observe(self, observer_info: ObserverInfo):
to_list_observer = ToListObserver(observer=observer_info.observer)
return self.source.observe(
observer_info.copy(
observer=ToListObserver(observer=observer_info.observer), ))
def observe(self, observer_info: ObserverInfo):
return self.source.observe(
observer_info.copy(observer=FirstOrDefaultObserver(
observer=observer_info.observer,
lazy_val=self.lazy_val,
)))
def observe(self, observer_info: ObserverInfo):
subscription = observer_info.copy(observer=FilterObserver(
observer=observer_info.observer,
predicate=self.predicate,
), )
return self.source.observe(subscription)
def observe(self, observer_info: ObserverInfo):
return self.source.observe(
observer_info.copy(observer=LastObserver(
observer=observer_info.observer,
stack=self.stack,
), ))
def observe(self, observer_info: ObserverInfo):
return self.source.observe(
observer_info.copy(observer=ObserveOnObserver(
observer=observer_info.observer,
scheduler=self.scheduler,
)))