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我有一个要求删除未传递的消息,当客户端订阅topic.I只是想在我的application.There实现块/疏通功能是步骤MQTT:删除未传递的消息
1) Person "A" blocked person "B",now person B publishing messages to A and person A will not get messages.
第一步很简单并轻松done.I我在这里面临着在第2步
2) when person A unblocked person "B" and reconnect to topic,then it should not get previous messages send by person "B".
我如何能做到这一点,有没有什么办法订阅之前清除主题的邮件问题?