Question

我正在尝试监视mqtt代理，以便在连接中断时触发通知。

我的方法是创建一个除了监控代理之外什么都不做的云客户端。 “on_disconnect”似乎是合适的方法，但我不能让它触发。（我一直在不同的终端上加载和卸载代理服务）。

该方法是一个骨架：

import random
import time


def RepresentsInt(s):
    try:
        int(s)
        return True
    except ValueError:
        return False
def on_message(client, userdata, message):
        print message
def on_connect(client, userdata, flags, rc):
    print("Connected with result code "+str(rc))
    mqttc.subscribe('control/iterate',qos=0)
def on_disconnect(client, userdata,  rc):
        print("Disconnected")
mqttc = mqtt.Client()
mqttc.on_connect = on_connect
mqttc.on_message = on_message
mqttc.connect('10.147.17.234', port=1883, keepalive=1)



print("test")
mqttc.loop_forever()

显然有很简单的方法可以做到这一点，但我觉得这个问题有一个优雅的解决方案，我只是缺少。

Answer 1

您实际上并未在代码中添加on_disconnect回调：

import random
import time


def RepresentsInt(s):
    try:
        int(s)
        return True
    except ValueError:
        return False
def on_message(client, userdata, message):
        print message
def on_connect(client, userdata, flags, rc):
    print("Connected with result code "+str(rc))
    mqttc.subscribe('control/iterate',qos=0)
def on_disconnect(client, userdata,  rc):
        print("Disconnected")
mqttc = mqtt.Client()
mqttc.on_connect = on_connect
mqttc.on_message = on_message
#added the following line
mqttc.on_disconnect = on_disconnect
mqttc.connect('10.147.17.234', port=1883, keepalive=1)



print("test")
mqttc.loop_forever()

on_disconnect mqtt客户端没有被调用

1 个答案: