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umqtt.robust: Resubscribe to topics after doing reconnect. #186

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umqtt.robust: Resubscribe to topics after doing reconnect. #186

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6542e9b
umqtt.robust: Resubscribe to topics after doing reconnect.
dpgeorge Jun 2, 2017
0ed2641
umqtt/robust: Only resubscribe if session state was not present.
dpgeorge Jun 7, 2017
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22 changes: 21 additions & 1 deletion umqtt.robust/umqtt/robust.py
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Original file line number Diff line number Diff line change
Expand Up @@ -6,6 +6,10 @@ class MQTTClient(simple.MQTTClient):
DELAY = 2
DEBUG = False

def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self.subscriptions = []

def delay(self, i):
utime.sleep(self.DELAY)

Expand All @@ -20,7 +24,13 @@ def reconnect(self):
i = 0
while 1:
try:
return super().connect(False)
ret = super().connect(False)
if not ret:
for topic, qos in self.subscriptions:
if self.DEBUG:
print("mqtt resubscribe: %r" % topic)
super().subscribe(topic, qos)
return ret
except OSError as e:
self.log(True, e)
i += 1
Expand All @@ -34,6 +44,16 @@ def publish(self, topic, msg, retain=False, qos=0):
self.log(False, e)
self.reconnect()

def subscribe(self, topic, qos=0):
while 1:
try:
ret = super().subscribe(topic, qos)
self.subscriptions.append((topic, qos))
return ret
except OSError as e:
self.log(False, e)
self.reconnect()

def wait_msg(self):
while 1:
try:
Expand Down