Question

我在哪里可以找到如何使用MQTT + JAva Config的示例？

这对我不起作用：http://docs.spring.io/spring-integration/reference/html/mqtt.html

Answer 1

使用Spring Boot解决

@Configuration
@ComponentScan
@EnableAutoConfiguration
@IntegrationComponentScan
public class Application {

  public static void main(String[] args) {
    SpringApplication.run(Application.class, args);
  }

  @Bean
  public MessageChannel mqttInputChannel() {
    return new DirectChannel();
  }

  @Bean
  public MqttPahoClientFactory mqttClientFactory() {
    DefaultMqttPahoClientFactory factory = new DefaultMqttPahoClientFactory();
    factory.setServerURIs("tcp://url:10423");
    factory.setUserName("username");
    factory.setPassword("password");
    return factory;
  }

  @Bean
  public MessageProducer inbound() {
    MqttPahoMessageDrivenChannelAdapter adapter =
            new MqttPahoMessageDrivenChannelAdapter("testMqtt", mqttClientFactory(),
                    "test");
    adapter.setCompletionTimeout(5000);
    adapter.setConverter(new DefaultPahoMessageConverter());
    adapter.setQos(1);
    adapter.setOutputChannel(mqttInputChannel());
    return adapter;
  }

  @Bean
  @ServiceActivator(inputChannel = "mqttInputChannel")
  public MessageHandler handler() {
    return new MessageHandler() {

      @Override
      public void handleMessage(Message<?> message) throws MessagingException {
        System.out.println("!!!!!!!!!!!!!!!!!!!" + message.getPayload());
      }

    };
  }

  @Bean
  @ServiceActivator(inputChannel = "mqttOutboundChannel")
  public MessageHandler mqttOutbound() {
    MqttPahoMessageHandler messageHandler =
            new MqttPahoMessageHandler("testClient", mqttClientFactory());
    messageHandler.setAsync(true);
    messageHandler.setDefaultTopic("test");
    return messageHandler;
  }

  @Bean
  public MessageChannel mqttOutboundChannel() {
    return new DirectChannel();
  }

  @MessagingGateway(defaultRequestChannel = "mqttOutboundChannel")
  public interface MyGateway {

    void sendToMqtt(String data);

  }

}

Answer 2

我很高兴你找到了解决方案。

我创建了一个示例应用程序，它使用Java DSL从stdin读取，发送到MQTT，接收和记录。

以下是相关内容：

// publisher

@Bean
public IntegrationFlow mqttOutFlow() {
    return IntegrationFlows.from(CharacterStreamReadingMessageSource.stdin(),
                    e -> e.poller(Pollers.fixedDelay(1000)))
            .transform(p -> p + " sent to MQTT")
            .handle(mqttOutbound())
            .get();
}

@Bean
public MessageHandler mqttOutbound() {
    MqttPahoMessageHandler messageHandler = new MqttPahoMessageHandler("siSamplePublisher", mqttClientFactory());
    messageHandler.setAsync(true);
    messageHandler.setDefaultTopic("siSampleTopic");
    return messageHandler;
}

// consumer

@Bean
public IntegrationFlow mqttInFlow() {
    return IntegrationFlows.from(mqttInbound())
            .transform(p -> p + ", received from MQTT")
            .handle(logger())
            .get();
}

private LoggingHandler logger() {
    LoggingHandler loggingHandler = new LoggingHandler("INFO");
    loggingHandler.setLoggerName("siSample");
    return loggingHandler;
}

@Bean
public MessageProducerSupport mqttInbound() {
    MqttPahoMessageDrivenChannelAdapter adapter = new MqttPahoMessageDrivenChannelAdapter("siSampleConsumer",
            mqttClientFactory(), "siSampleTopic");
    adapter.setCompletionTimeout(5000);
    adapter.setConverter(new DefaultPahoMessageConverter());
    adapter.setQos(1);
    return adapter;
}

foo
14:40:56.770 [MQTT Call: siSampleConsumer] INFO  siSample - foo sent to MQTT, received from MQTT

修改

带有注释的官方Spring Integration MQTT示例＆amp; DSL配置位于：https://github.com/spring-projects/spring-integration-samples/tree/master/basic/mqtt

Spring MQTT JAva Config示例问题

2 个答案: