async def ping_observing_task(address):
logger = logging.getLogger('moler.user.app-code')
# Lowest layer of Moler's usage (you manually glue all elements):
# 1. create observer
net_down_detector = NetworkDownDetector('10.0.2.15')
# 2. ObservableConnection is a proxy-glue between observer (speaks str)
# and asyncio-connection (speaks bytes)
moler_conn = ObservableConnection(
decoder=lambda data: data.decode("utf-8"))
# 3a. glue from proxy to observer
moler_conn.subscribe(net_down_detector.data_received)
logger.debug('waiting for data to observe')
async for connection_data in tcp_connection(address):
# 3b. glue to proxy from external-IO (asyncio tcp client connection)
# (client code has to pass it's received data into Moler's connection)
moler_conn.data_received(connection_data)
# 4. Moler's client code must manually check status of observer ...
if net_down_detector.done():
# 5. ... to know when it can ask for result
net_down_time = net_down_detector.result()
timestamp = time.strftime("%H:%M:%S",
time.localtime(net_down_time))
logger.debug('Network is down from {}'.format(timestamp))
break
def test_events_true_any_one():
connection = ObservableConnection()
events = list()
patterns = ("aaa", "bbb")
for pattern in patterns:
event = Wait4prompt(connection=connection,
till_occurs_times=1,
prompt=pattern)
event.start()
events.append(event)
connection.data_received(patterns[0])
assert EventAwaiter.wait_for_any(timeout=0.1, events=events) is True
done, not_done = EventAwaiter.separate_done_events(events)
assert 1 == len(done)
assert 1 == len(not_done)
EventAwaiter.cancel_all_events(events)
def test_garbage_collected_subscriber_is_not_notified():
from moler.observable_connection import ObservableConnection
moler_conn = ObservableConnection()
received_data = []
class Subscriber(object):
def __call__(self, data):
received_data.append(data)
subscr1 = Subscriber()
subscr2 = Subscriber()
moler_conn.subscribe(observer=subscr1,
connection_closed_handler=do_nothing_func)
moler_conn.subscribe(observer=subscr2,
connection_closed_handler=do_nothing_func)
del subscr1
gc.collect()
moler_conn.data_received("data")
assert len(received_data) == 1
def test_single_unsubscription_doesnt_impact_other_subscribers():
from moler.observable_connection import ObservableConnection
class TheObserver(object):
def __init__(self):
self.received_data = []
def on_new_data(self, data):
self.received_data.append(data)
observer1 = TheObserver()
observer2 = TheObserver()
function_received_data = []
def raw_fun1(data):
function_received_data.append(data)
def raw_fun2(data):
function_received_data.append(data)
class TheCallableClass(object):
def __init__(self):
self.received_data = []
def __call__(self, data):
self.received_data.append(data)
callable1 = TheCallableClass()
callable2 = TheCallableClass()
moler_conn = ObservableConnection()
moler_conn.subscribe(observer=observer1.on_new_data,
connection_closed_handler=do_nothing_func)
moler_conn.subscribe(observer=observer2.on_new_data,
connection_closed_handler=do_nothing_func)
moler_conn.subscribe(observer=observer2.on_new_data,
connection_closed_handler=do_nothing_func)
moler_conn.unsubscribe(observer=observer1.on_new_data,
connection_closed_handler=do_nothing_func)
moler_conn.unsubscribe(observer=observer1.on_new_data,
connection_closed_handler=do_nothing_func)
moler_conn.subscribe(observer=raw_fun1,
connection_closed_handler=do_nothing_func)
moler_conn.subscribe(observer=raw_fun2,
connection_closed_handler=do_nothing_func)
moler_conn.subscribe(observer=raw_fun2,
connection_closed_handler=do_nothing_func)
moler_conn.unsubscribe(observer=raw_fun1,
connection_closed_handler=do_nothing_func)
moler_conn.subscribe(observer=callable1,
connection_closed_handler=do_nothing_func)
moler_conn.subscribe(observer=callable2,
connection_closed_handler=do_nothing_func)
moler_conn.subscribe(observer=callable2,
connection_closed_handler=do_nothing_func)
moler_conn.unsubscribe(observer=callable1,
connection_closed_handler=do_nothing_func)
moler_conn.data_received("incoming data")
assert observer1.received_data == []
assert observer2.received_data == ["incoming data"]
assert function_received_data == ["incoming data"]
assert callable1.received_data == []
assert callable2.received_data == ["incoming data"]