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backend 如何发送消息到设备时,是如何指定设备连接在哪个gateway上面的? #1
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现在没有指定设备发送,消息发送流程
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设备订阅的时候,gateway会订阅一个对应的topic到broker(kafka),这样topic会不会太多了? |
Gateway只订阅一级topic(比如a/b/c,Gateway订阅的是a),然后在消息里有完整topic 对,多个Gateway会消费相同的topic |
这样的话,backend srv收到消息后,回复的响应没办法保证client能收到了 |
好的,谢谢,非常棒的框架 |
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主动下发消息的情况
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