def __init__(self, pipe_in, pipe_out):
self.__amber_pipes = AmberPipes(self, pipe_in, pipe_out)
self.__subscribers = []
self.__subscribers_lock = threading.Lock()
self.__logger = logging.getLogger(LOGGER_NAME)
class MessageHandler(object):
def __init__(self, pipe_in, pipe_out):
self.__amber_pipes = AmberPipes(self, pipe_in, pipe_out)
self.__subscribers = []
self.__subscribers_lock = threading.Lock()
self.__logger = logging.getLogger(LOGGER_NAME)
def __call__(self, *args, **kwargs):
self.__amber_pipes(*args, **kwargs)
def run(self):
self.__amber_pipes.run()
def is_alive(self):
return self.__amber_pipes.is_alive()
def get_pipes(self):
return self.__amber_pipes
@abc.abstractmethod
def handle_data_message(self, header, message):
pass
@abc.abstractmethod
def handle_subscribe_message(self, header, message):
pass
@abc.abstractmethod
def handle_unsubscribe_message(self, header, message):
pass
@abc.abstractmethod
def handle_client_died_message(self, client_id):
pass
def fill_subscription_response(self, response_message):
pass
def send_subscribers_message(self):
subscribers = self.__get_subscribers()
if len(subscribers) > 0:
response_header = drivermsg_pb2.DriverHdr()
response_message = drivermsg_pb2.DriverMsg()
response_message.type = drivermsg_pb2.DriverMsg.DATA
response_message.ackNum = 0
response_header.clientIDs.extend(subscribers)
response_message = self.fill_subscription_response(response_message)
self.get_pipes().write_header_and_message_to_pipe(response_header, response_message)
def sending_loop(self):
while self.is_alive():
self.send_subscribers_message()
time.sleep(0.1)
def __get_subscribers(self):
self.__subscribers_lock.acquire()
try:
return list(self.__subscribers)
finally:
self.__subscribers_lock.release()
def add_subscribers(self, client_ids):
self.__subscribers_lock.acquire()
try:
self.__subscribers.extend(client_ids)
finally:
self.__subscribers_lock.release()
def remove_subscriber(self, client_id):
self.__subscribers_lock.acquire()
try:
self.__subscribers.remove(client_id)
except ValueError:
self.__logger.warning('Client %d does not registered as subscriber', client_id)
finally:
self.__subscribers_lock.release()
def is_any_subscriber(self):
self.__subscribers_lock.acquire()
try:
return len(self.__subscribers) > 0
finally:
self.__subscribers_lock.release()
@staticmethod
def handle_and_response(func):
@wraps(func)
def wrapped(inst, received_header, received_message):
response_header = drivermsg_pb2.DriverHdr()
response_message = drivermsg_pb2.DriverMsg()
response_message.type = drivermsg_pb2.DriverMsg.DATA
response_message.ackNum = received_message.synNum
response_header.clientIDs.extend(received_header.clientIDs)
response_header, response_message = func(inst, received_header, received_message,
response_header, response_message)
inst.get_pipes().write_header_and_message_to_pipe(response_header, response_message)
return wrapped
def setUp(self):
self.mocked_stdin, self.mocked_stdout = mock.Mock(), mock.Mock()
self.mocked_message_handler = mock.Mock()
self.amber_pipes = AmberPipes(self.mocked_message_handler,
self.mocked_stdin, self.mocked_stdout)
