59 行
1.8 KiB
Python
59 行
1.8 KiB
Python
import config
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import json
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import logging
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import mqtt
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import report
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import subprocess
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import time
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try:
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from config import APP_NAME as ROOT_LOGGER_NAME
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except ImportError:
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ROOT_LOGGER_NAME = 'root'
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logger = logging.getLogger(ROOT_LOGGER_NAME).getChild('main')
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class exec_command(mqtt.mqtt_client):
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def __init__(self):
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self.__block_execution__ = False
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mqtt.mqtt_client.__init__(self, config.APP_NAME, config.MQTT_SERVER, 1883, config.MQTT_USER, config.MQTT_PASS)
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self.add_callback(config.TOPIC, self.mqtt_rx)
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# Start a pseudo process
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self.process = subprocess.Popen(["sleep", "0"])
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def exec_command(self):
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self.process = subprocess.Popen(config.COMMAND.split(" "))
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def mqtt_rx(self, client, userdate, message):
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data = None
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if config.PAYLOAD_KEY is None:
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try:
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data = message.payload.decode('utf-8')
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except:
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logger.exception("Error decoding mqtt message")
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else:
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try:
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payload = json.loads(message.payload)
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except:
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logger.exception("Error decoding json mqtt message")
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else:
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data = payload.get(config.PAYLOAD_KEY)
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if config.PAYLOAD_DATA is None or data == config.PAYLOAD_DATA:
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if self.process.poll() is None:
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self.process.kill()
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logger.debug("Starting execution in background...")
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self.exec_command()
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if __name__ == '__main__':
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report.appLoggingConfigure(config.__BASEPATH__, config.LOGTARGET, ((config.APP_NAME, config.LOGLVL), ), fmt=config.formatter, host=config.LOGHOST, port=config.LOGPORT)
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#
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ec = exec_command()
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#
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while True:
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time.sleep(30)
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try:
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ec.join()
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finally:
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ec.stop()
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