title: How to integrate a mqtt broker into spring boot project
body: <p>How to integrate a mqtt broker into spring boot project ？</p>
  <p>I had ever tried spring-boot-starter-activemq , but it is a client ,not a broker</p>
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  <p>the main purpose is bridge message between cloud mqtt broker and Intranet Mqtt broker ， include message bridging and topic management</p>