def test_channel_management(use_dedicated_thread_mode=True):
bus = MessageBus()
initial_channel_count = len(bus.channels) # root channel, internal
# log channel, etc.
test_channels = {}
bus.start() # The bus has already been started by __init__, but
# this extra call should do no damage!
if use_dedicated_thread_mode:
bus.turn_on_dedicated_thread_mode()
attempt_to_create_existing_channel(bus, 'root')
assert bus.root_channel == bus.get_channel('root')
def addchan(name, parent):
get_nonexistent_channel(bus, name)
test_channels[name] = chan = bus.create_new_channel(name)
assert chan == bus.get_channel(name)
assert chan.parent_channel == parent
assert chan in parent.child_channels
assert chan.name == name
return chan
for i in xrange(5):
topname = 'top%i'%i
topchan = addchan(topname, bus.root_channel)
for j in xrange(5):
subname = '%s.subchan%i'%(topname, j)
subchan = addchan(subname, topchan)
assert len(topchan.child_channels) == j+1
assert '.'.join(subchan.name.split('.')[:-1])==topchan.name
for k in xrange(5):
subsubchan = addchan('%s.subsubchan%i'%(subname, k), subchan)
assert len(subchan.child_channels) == k+1
assert '.'.join(subsubchan.name.split('.')[:-1])==subchan.name
assert len(bus.channels) == (len(test_channels)+initial_channel_count)
assert len(bus.channels) == len(bus.get_open_channel_names())
chanX = bus.create_new_channel('X')
attempt_to_create_existing_channel(bus, 'X')
assert chanX.parent_channel == bus.root_channel
assert bus.get_channel('X') == chanX
assert bus.create_new_channel('x') != chanX
chanY = bus.create_new_channel('X.Y')
assert chanY.parent_channel == chanX
assert chanX.name in bus.channels
assert chanY.name in bus.channels
bus.stop()
class LoggingContext(object):
def __init__(self, channel_name='Test'):
self.bus = MessageBus(
channel_class=LogChannel,
use_dedicated_thread_mode=True)
self.log_channel = self.bus.create_new_channel(channel_name)
self.messages = []
self.log_channel.subscribe(lambda msg: self.messages.append(msg))
def __enter__(self):
self.bus.start()
return self
def __exit__(self, exc_type=None, exc_val=None, exc_tb=None):
self.bus.stop()
formatter = Formatter()
for msg in self.messages:
print formatter.format(msg)
def __init__(self, channel_name):
self.channel_name = channel_name
self.messages = []
self.done = Event()
def __call__(self, msg):
if not self.done.isSet():
# only expecting a single message
self.messages.append((msg, current_thread_id()))
self.done.set()
else:
raise Exception('Was only expecting a single message')
## setup non-wildcard subscriptions
for channel_name in channel_names:
channel = bus.create_new_channel(channel_name)
subscriber = Subscriber(channel_name)
subscription=bus.subscribe(
channel_name, subscriber,
async=async, thread_id=(threadlocal and test_thread_id or 0))
channels[channel_name] = (channel, subscription)
assert subscription.channel == channel
assert subscription.subscriber == subscriber
assert not subscription.include_subchannels
assert subscription.message_count == 0
assert subscription.timestamp >= start_time
assert subscription.is_active
assert subscription.async == async
assert subscription.thread_id == (threadlocal and test_thread_id or 0)
