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我正在使用 Spring 的 spring-integration-mqtt，我可以连接到单个 Mqtt 服务器并可以接收有关订阅主题的消息，现在我想制作可以连接到多个 Mqtt 服务器并可以从每个连接接收数据的应用程序，我想要将其作为动态管理，我可以从数据库或文本文件中添加更多 Mqtt 服务器。

用于订阅的单个 Mqtt 连接的简单 bean 如下

@Bean
public MessageProducer inbound() {

    MqttPahoMessageDrivenChannelAdapter adapter2 =
            new MqttPahoMessageDrivenChannelAdapter("tcp://192.168.100.1:1883","mqtt_virtual_received_sus_2",
                                             "DATA/#", "LD/#","CONF/#","CONFIG/#");
    adapter2.setCompletionTimeout(0);
    adapter2.setConverter(new DefaultPahoMessageConverter());
    adapter2.setQos(2);

    adapter2.setOutputChannel(mqttInputChannel());
    return adapter2;

}

上面的代码为 mqtt 服务器创建了一个连接，并且可以接收消息，如果我将相同的代码复制两次粘贴到具有不同 Mqtt ip 地址的第二个服务器，我可以连接到两个 Mqtt 服务器，如下所示

@Bean
public MessageProducer inbound() {

    MqttPahoMessageDrivenChannelAdapter adapter2 =
            new MqttPahoMessageDrivenChannelAdapter("tcp://192.168.100.1:1883","mqtt_virtual_received_sus_2",
                                             "DATA/#", "LD/#","CONF/#","CONFIG/#");
    adapter2.setCompletionTimeout(0);
    adapter2.setConverter(new DefaultPahoMessageConverter());
    adapter2.setQos(2);

    adapter2.setOutputChannel(mqttInputChannel());
    return adapter2;

}

@Bean
public MessageProducer inbound2() {

    MqttPahoMessageDrivenChannelAdapter adapter2 =
            new MqttPahoMessageDrivenChannelAdapter("tcp://192.168.100.14:1883","mqtt_virtual_received_sus_1",
                                             "DATA/#", "LD/#","CONF/#","CONFIG/#");
    adapter2.setCompletionTimeout(0);
    adapter2.setConverter(new DefaultPahoMessageConverter());
    adapter2.setQos(2);

    adapter2.setOutputChannel(mqttInputChannel());
    return adapter2;

}

上面的代码也可以正常工作，我可以从两个 Mqtt 服务器接收消息，但是有什么方法可以动态管理它，如下所示，我将 bean 的返回类型更改为列表，但没有工作： 

  @Bean
  public List<MqttPahoMessageDrivenChannelAdapter> getAdapter () {
      List<MqttPahoMessageDrivenChannelAdapter > logConfList=new ArrayList<MqttPahoMessageDrivenChannelAdapter>();
      MqttPahoMessageDrivenChannelAdapter adapter2 =
              new MqttPahoMessageDrivenChannelAdapter("tcp://192.168.100.1:1883","mqtt_virtual_received_sus_2",
                                               "DATA/#", "LD/#","CONF/#","CONFIG/#");
      adapter2.setCompletionTimeout(0);
      adapter2.setConverter(new DefaultPahoMessageConverter());
      adapter2.setQos(2);

      adapter2.setOutputChannel(mqttInputChannel() );

      MqttPahoMessageDrivenChannelAdapter adapter =
              new MqttPahoMessageDrivenChannelAdapter("tcp://192.168.100.14:1883","mqtt_virtual_received_sus_1",
                                               "DATA/#", "LD/#","CONF/#","CONFIG/#");
      adapter.setCompletionTimeout(0);
      adapter.setConverter(new DefaultPahoMessageConverter());
      adapter.setQos(2);

      adapter.setOutputChannel(mqttInputChannel() );
      logConfList.add(adapter);
      logConfList.add(adapter2);

      return logConfList;

  }

有什么方法可以动态管理这些bean，我可以从文本文件和for循环中获取mqtt服务器详细信息，或者我可以管理多个连接。

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1 回答 1

3

请参阅动态和运行时集成流。

@Autowired
private IntegrationFlowContext flowContext;

private IntegrationFlowRegistration addAnAdapter(String uri, String clientId, MessageChannel channel,
        String... topics) {
    MqttPahoMessageDrivenChannelAdapter adapter = new MqttPahoMessageDrivenChannelAdapter(uri, clientId, topics);
    // more adapter configuration
    IntegrationFlow flow = IntegrationFlows.from(adapter)
        .channel(channel)
        .get();
    return this.flowContext.registration(flow).register();
}

private void removeAdapter(IntegrationFlowRegistration flowReg) {
    this.flowContext.remove(flowReg.getId());
}
于 2018-01-27T17:35:02.387 回答