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declension / squeeze-alexa

Squeezebox integration for Amazon Alexa
GNU General Public License v3.0
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MQTT: track persistent connections and avoid reconnects #87

Closed declension closed 6 years ago

declension commented 6 years ago

Warm lambdas could perhaps use persistent connections, but

  1. are reconnecting needlessly when a check or even assumption before publishing would do (perhaps)
  2. are adding listeners to the connection success event: inefficient and noisy (potentially harmful at scale too)

Seems like the listeners are giving away the problem:

08:00:09 Connecting to {'hostname': '****.iot.eu-west-1.amazonaws.com', 'cert_dir': '/var/task/etc/certs', 'port': 8883, 'internal_server_hostname': '192.168.1.9', 'topic_req': 'squeeze-req', 'topic_resp': 'squeeze-resp', 'debug': False}
Connecting to {'hostname': '****.iot.eu-west-1.amazonaws.com', 'cert_dir': '/var/task/etc/certs', 'port': 8883, 'internal_server_hostname': '192.168.1.9', 'topic_req': 'squeeze-req', 'topic_resp': 'squeeze-resp', 'debug': False}
08:00:11 Connected to client to ****.iot.eu-west-1.amazonaws.com:8883. Subscribing to squeeze-resp
08:00:11 Connected to client to ****.iot.eu-west-1.amazonaws.com:8883. Subscribing to squeeze-resp
08:00:11 Connected to client to ****.iot.eu-west-1.amazonaws.com:8883. Subscribing to squeeze-resp 
08:00:11 Connected to client to ****.iot.eu-west-1.amazonaws.com:8883. Subscribing to squeeze-resp
08:00:11 Connected to client to ****.iot.eu-west-1.amazonaws.com:8883. Subscribing to squeeze-resp
08:00:11 MQTT/TLS transport to client to ****.iot.eu-west-1.amazonaws.com:8883 initialised. (@QoS (1,))
08:00:11 MQTT/TLS transport to client to ****.iot.eu-west-1.amazonaws.com:8883 initialised. (@QoS (1,))
08:00:11 MQTT/TLS transport to client to ****.iot.eu-west-1.amazonaws.com:8883 initialised. (@QoS (1,))
08:00:11 MQTT/TLS transport to client to ****.iot.eu-west-1.amazonaws.com:8883 initialised. (@QoS (1,))
08:00:11 MQTT/TLS transport to client to ****.iot.eu-west-1.amazonaws.com:8883 initialised. (@QoS (1,))