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connect() method returns a Future which has result set if the session is disconnected from the broker.

pull/8/head
Nicolas Jouanin 2015-08-11 22:20:03 +02:00
rodzic 1e563ee257
commit 74a66632cf
2 zmienionych plików z 56 dodań i 52 usunięć
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85
hbmqtt/client.py
Wyświetl plik

@ -29,6 +29,11 @@ class ClientException(BaseException):
pass
class ConnectException(ClientException):
def __init__(self, code):
self.return_code = code
class MQTTClient:
def __init__(self, client_id=None, config=None, loop=None):
"""
@ -73,6 +78,8 @@ class MQTTClient:
self.session = None
self._handler = None
self._disconnect_task = None
self._connection_closed_future = None
@asyncio.coroutine
def connect(self,
@ -88,64 +95,40 @@ class MQTTClient:
:param cafile: server certificate authority file
:return:
"""
try:
self.session = self._initsession(uri, cleansession, cafile, capath, cadata)
self.logger.debug("Connect to: %s" % uri)
self.session = self._initsession(uri, cleansession, cafile, capath, cadata)
self.logger.debug("Connect to: %s" % uri)
return_code = yield from self._connect_coro()
self._disconnect_task = asyncio.Task(self.handle_connection_close())
return return_code
except MachineError:
msg = "Connect call incompatible with client current state '%s'" % self.session.transitions.state
self.logger.warn(msg)
self.session.transitions.connect_fail()
raise ClientException(msg)
except Exception as e:
self.session.transitions.disconnect()
self.logger.warn("Connection failed: %s " % e)
raise ClientException("Connection failed: %s " % e)
return_code = yield from self._connect_coro()
self._connection_closed_future = asyncio.Future(loop=self._loop)
self._disconnect_task = asyncio.Task(self.handle_connection_close())
return self._connection_closed_future
@asyncio.coroutine
def disconnect(self):
try:
self.session.transitions.disconnect()
if self.session.transitions.is_connected():
if not self._disconnect_task.done():
self._disconnect_task.cancel()
yield from self._handler.mqtt_disconnect()
yield from self._handler.stop()
self._handler.detach_from_session()
except MachineError as me:
if self.session.transitions.state == "disconnected":
self.logger.warn("Client session is already disconnected")
else:
self.logger.debug("Invalid method call at this moment: %s" % me)
raise ClientException("Client instance can't be disconnected: %s" % me)
except Exception as e:
self.logger.warn("Unhandled exception: %s" % e)
raise ClientException("Unhandled exception: %s" % e)
self.session.transitions.disconnect()
self._connection_closed_future.set_result(None)
else:
self.logger.warn("Client session is not currently connected, ignoring call")
@asyncio.coroutine
def reconnect(self, cleansession=False):
if self.session.transitions.state == 'connected':
if self.session.transitions.is_connected():
self.logger.warn("Client already connected")
return CONNECTION_ACCEPTED
try:
self.session.clean_session = cleansession
self.logger.debug("Reconnecting with session parameters: %s" % self.session)
self.session.clean_session = cleansession
self.logger.debug("Reconnecting with session parameters: %s" % self.session)
return_code = yield from self._connect_coro()
self._disconnect_task = asyncio.Task(self.handle_connection_close())
return return_code
except MachineError:
msg = "Connect call incompatible with client current state '%s'" % self.session.transitions.state
self.logger.warn(msg)
self.session.transitions.disconnect()
raise ClientException(msg)
except Exception as e:
self.session.transitions.disconnect()
self.logger.warn("Connection failed: %s " % e)
raise ClientException("Connection failed: %s " % e)
return_code = yield from self._connect_coro()
self._connection_closed_future = asyncio.Future(loop=self._loop)
self._disconnect_task = asyncio.Task(self.handle_connection_close())
return self._connection_closed_future
@asyncio.coroutine
def ping(self):
@ -153,7 +136,7 @@ class MQTTClient:
Send a MQTT ping request and wait for response
:return: None
"""
if self.session.transitions.state == 'connected':
if self.session.transitions.is_connected():
yield from self._handler.mqtt_ping()
else:
self.logger.warn("MQTT PING request incompatible with current session state '%s'" %
@ -179,6 +162,8 @@ class MQTTClient:
except KeyError:
pass
return _qos, _retain
if not self.session.transitions.is_connected():
self.logger.warn("publish MQTT message while not connected to broker, message may be lost")
(app_qos, app_retain) = get_retain_and_qos()
if app_qos == 0:
yield from self._handler.mqtt_publish(topic, message, 0x00, app_retain)
@ -189,10 +174,14 @@ class MQTTClient:
@asyncio.coroutine
def subscribe(self, topics):
if not self.session.transitions.is_connected():
self.logger.warn("subscribe while not connected to broker, message may be lost")
return (yield from self._handler.mqtt_subscribe(topics, self.session.next_packet_id))
@asyncio.coroutine
def unsubscribe(self, topics):
if not self.session.transitions.is_connected():
self.logger.warn("unsubscribe while not connected to broker, message may be lost")
yield from self._handler.mqtt_unsubscribe(topics, self.session.next_packet_id)
@asyncio.coroutine
@ -261,6 +250,7 @@ class MQTTClient:
yield from self._handler.stop()
self.session.transitions.disconnect()
self.logger.warn("Connection rejected with code '%s'" % return_code)
raise ConnectException(return_code)
else:
# Handle MQTT protocol
self._handler = ClientProtocolHandler(reader, writer, loop=self._loop)
@ -268,7 +258,6 @@ class MQTTClient:
yield from self._handler.start()
self.session.transitions.connect()
self.logger.debug("connected to %s:%s" % (self.session.remote_address, self.session.remote_port))
return return_code
except Exception as e:
self.logger.warn("connection failed: %s" % e)
self.session.transitions.disconnect()
@ -313,13 +302,7 @@ class MQTTClient:
self.logger.debug("Handle broker disconnection")
yield from self._handler.stop()
self.session.transitions.disconnect()
# while self.session.transitions.state != 'connected':
# yield from asyncio.sleep(2)
# self.logger.debug("Trying reconnect")
# try:
# yield from self.reconnect()
# except ClientException:
# self.logger.warn("Reconnect failed")
self._connection_closed_future.set_result(None)
def _initsession(
self,

23
samples/client_publish.py
Wyświetl plik

@ -23,6 +23,12 @@ config = {
#C = MQTTClient(config=config)
C = MQTTClient()
def disconnected(future):
print("DISCONNECTED")
asyncio.get_event_loop().stop()
@asyncio.coroutine
def test_coro():
yield from C.connect('mqtt://localhost:1883/')
@ -36,7 +42,22 @@ def test_coro():
yield from C.disconnect()
@asyncio.coroutine
def test_coro2():
future = yield from C.connect('mqtt://localhost:1883/')
future.add_done_callback(disconnected)
yield from asyncio.wait([asyncio.async(C.publish('a/b', b'TEST MESSAGE WITH QOS_1', qos=0x01))])
yield from asyncio.sleep(10)
yield from asyncio.wait([asyncio.async(C.publish('a/b', b'TEST MESSAGE WITH QOS_1', qos=0x01))])
logger.info("messages published")
yield from C.disconnect()
if __name__ == '__main__':
formatter = "[%(asctime)s] {%(filename)s:%(lineno)d} %(levelname)s - %(message)s"
logging.basicConfig(level=logging.DEBUG, format=formatter)
asyncio.get_event_loop().run_until_complete(test_coro())
asyncio.async(test_coro2())
try:
asyncio.get_event_loop().run_forever()
finally:
asyncio.get_event_loop().close()