def run(self):
try:
context = zmq.Context()
sub_layer = context.socket(zmq.SUB)
pub_host = self.__pub_addr[0]
pub_port = self.__pub_addr[1]
sub_layer.bind('tcp://%s:%d' % (pub_host, pub_port))
sub_layer.setsockopt(zmq.SUBSCRIBE, b'')
self.__log('setting up subscribing layer to services on {}'.format(
self.__pub_addr))
logger.info(
'setting up subscribing layer to services on {}'.format(
self.__pub_addr))
pub_layer = context.socket(zmq.PUB)
sub_host = self.__sub_addr[0]
sub_port = self.__sub_addr[1]
pub_layer.bind('tcp://%s:%d' % (sub_host, sub_port))
self.__log('setting up publishing layer to listeners on {}'.format(
self.__sub_addr))
logger.info(
'setting up publishing layer to listeners on {}'.format(
self.__sub_addr))
zmq.device(zmq.FORWARDER, sub_layer, pub_layer)
except Exception as e:
# TODO: send error to interface
self.__log('error')
print(e)
def disconnect():
"""
Terminates system and device layer forwarders.
"""
logger.info('browser client disconnected')
if SystemForwarderTopic.FORWARDER in forwarders.keys():
system_forwarder = forwarders.get(SystemForwarderTopic.FORWARDER)
system_forwarder.running = False
system_forwarder.terminate()
system_forwarder.join()
forwarders.pop(SystemForwarderTopic.FORWARDER)
if DeviceForwarderTopic.FORWARDER in forwarders.keys():
device_forwarder = forwarders.get(DeviceForwarderTopic.FORWARDER)
device_forwarder.running = False
device_forwarder.terminate()
device_forwarder.join()
forwarders.pop(DeviceForwarderTopic.FORWARDER)
if DeviceForwarderTopic.FORWARDER_INTERNAL in devices.keys():
internal_forwarder = devices.get(
DeviceForwarderTopic.FORWARDER_INTERNAL)
internal_forwarder.running = False
internal_forwarder.terminate()
internal_forwarder.join()
devices.pop(DeviceForwarderTopic.FORWARDER_INTERNAL)
def connect():
"""
Configures and initializes system and device layer forwarders.
"""
logger.info('browser client connected')
system_forwarder = Forwarder(topic=SystemForwarderTopic.FORWARDER,
pub_addr=InternalAddress.SYSTEM_PUB,
sub_addr=InternalAddress.SYSTEM_SUB)
device_forwarder = Forwarder(topic=DeviceForwarderTopic.FORWARDER,
pub_addr=InternalAddress.DEVICE_PUB,
sub_addr=InternalAddress.DEVICE_SUB)
internal_forwarder = Forwarder(
topic=DeviceForwarderTopic.FORWARDER_INTERNAL,
pub_addr=('127.0.0.1', 8100),
sub_addr=('127.0.0.1', 8101))
internal_forwarder.running = True
if DeviceForwarderTopic.FORWARDER_INTERNAL not in forwarders.keys():
forwarders[
DeviceForwarderTopic.FORWARDER_INTERNAL] = internal_forwarder
forwarders.get(DeviceForwarderTopic.FORWARDER_INTERNAL).start()
system_forwarder.running = True
if SystemForwarderTopic.FORWARDER not in forwarders.keys():
forwarders[SystemForwarderTopic.FORWARDER] = system_forwarder
forwarders.get(SystemForwarderTopic.FORWARDER).start()
device_forwarder.running = True
if DeviceForwarderTopic.FORWARDER not in forwarders.keys():
forwarders[DeviceForwarderTopic.FORWARDER] = device_forwarder
forwarders.get(DeviceForwarderTopic.FORWARDER).start()
def create_app():
app = Flask(__name__, static_folder='static', template_folder='templates')
app.config['SECRET_KEY'] = 'secret!'
app.threaded = True
logger.info('initializing flask websocket app')
return app
def get_help_view():
logger.info('redirecting to help page')
return render_template('help.html')
def get_home_view():
logger.info('redirecting to home page')
return render_template('home.html')