Weapons grade MQTT client.
The haka_mqtt package is reliable “weapons grade” MQTT client library. It contains a core mqtt reactor class built with provable reliability, and reproducibility as its fundamental goals. A side effect is that the library turns out to be speedy as well.
The project’s core reactor is stable. It has been tested on systems with thousands of distributed nodes in difficult field conditions. The QoS=1 datapath is well field tested. The QoS=0 and QoS=2 are not as thoroughly field tested.
While the core reactor is very well tested the frontends are less tested. You should pay attention to notes on the different frontends regarding their status and use.
The haka library is mostly tested on Linux derivatives. It may work on other platforms but this has not been tested by the authors and no definite reports of success have been reported to the authors.
A quick example of how the package can be used:
# Standard python Packages import logging # 3rd-Party Packages from haka_mqtt.frontends.poll import ( MqttPollClientProperties, BlockingMqttClient ) from haka_mqtt.reactor import ACTIVE_STATES from mqtt_codec.packet import MqttTopic LOG_FMT='%(asctime)s %(name)s %(levelname)s %(message)s' logging.basicConfig(format=LOG_FMT, level=logging.INFO) properties = MqttPollClientProperties() properties.host = 'test.mosquitto.org' properties.port = 1883 properties.ssl = False TOPIC = 'haka' c = BlockingMqttClient(properties) c.start() sub_ticket = c.subscribe([MqttTopic(TOPIC, 1)]) c.on_suback = lambda c, suback: c.publish(TOPIC, 'payload', 1) c.on_publish = lambda c, publish: c.stop() while c.state in ACTIVE_STATES: c.poll(5.)
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