56 lines
1.6 KiB
Python
56 lines
1.6 KiB
Python
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import time
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import zmq
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import proto.telemetry_pb2 as proto
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class Subscriber:
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def __init__(self, addr, topics=None, conflate=1):
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self.ctx = zmq.Context().instance()
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self.socket = self.ctx.socket(zmq.SUB)
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self.socket.setsockopt(zmq.CONFLATE, conflate)
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self._topics = set()
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self.socket.connect(addr)
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if topics is not None:
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for topic in topics:
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self.subscribe(topic)
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def subscribe(self, topic):
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if len(topic) == 0:
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self.socket.subscribe('')
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self._topics.add('')
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return
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if not topic in self._topics:
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self._topics.add(topic)
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topic_bytes = bytearray([10, len(topic)])
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topic_bytes.extend(topic)
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self.socket.subscribe(bytes(topic_bytes))
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def topics(self):
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return list(self._topics)
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def receive(self):
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return self.socket.recv()
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def close(self):
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return self.socket.close()
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class Publisher:
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def __init__(self, addr, conflate=1):
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self.ctx = zmq.Context().instance()
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self.socket = self.ctx.socket(zmq.PUB)
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self.socket.setsockopt(zmq.CONFLATE, conflate)
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self.socket.bind(addr)
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def publish(self, message, topic=b''):
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message = proto.Packet(topic=topic, created=int(time.time()), payload=message)
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return self.socket.send(message.SerializeToString())
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def publish_json(self, message, topic=b''):
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return self.publish(json.dumps(message).encode('UTF-8'), topic)
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def close(self):
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return self.socket.close()
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