java代码消费mqtt协议的demo

最新推荐文章于 2025-03-25 09:04:39 发布

原创最新推荐文章于 2025-03-25 09:04:39 发布 · 514 阅读

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CC 4.0 BY-SA版权

文章标签：

#rabbitmq #java

该博客展示了一个Java程序，用于订阅并消费通过MQTT协议发布的RabbitMQ消息。程序创建了一个MqttClient实例，设置连接选项如用户名、密码和超时时间，并实现了MqttCallback接口以处理连接丢失、消息到达和传递完成的事件。

消费rmq中mqtt协议的demo

主函数类：
public static void main(String[] args) throws MqttException {

        String clientId = UUIDTool.getRandomUUID();

        MqttClient client = new MqttClient("tcp://10.19.141.219:1883", clientId,
            new MemoryPersistence());
        MqttConnectOptions options = new MqttConnectOptions();
        options.setCleanSession(false);
        options.setUserName("root");
        options.setPassword("QhVGBvvF".toCharArray());
        // 设置超时时间
        options.setConnectionTimeout(10);
        options.setAutomaticReconnect(true);
        // 设置会话心跳时间
        options.setKeepAliveInterval(20);

        client.setCallback(new PushCallbackService());
        client.connect(options);
        client.subscribe("ianalysis_dac/admin", 1);
    }

统一提供的回调函数类
public class PushCallbackService implements MqttCallback {

    private static final HikGaLogger logger = HikGaLoggerFactory.getLogger(PushCallbackService.class);

    @Override
    public void connectionLost(Throwable throwable) {
        logger.info("RabbitMQ MQTT connection is break!", throwable);
    }

    @Override
    public void messageArrived(String topic, MqttMessage message) throws Exception {
        logger.info("receive one message, topic:{}, Qos:{}, content:{}",
            topic,
            message.getQos(),
            new String(message.getPayload(), Constant.ENCODING_UTF8));
    }

    @Override
    public void deliveryComplete(IMqttDeliveryToken iMqttDeliveryToken) {
        logger.info("RabbitMQ deliveryComplete, isComplete:{}, messageId:{}",
            iMqttDeliveryToken.isComplete(),
            iMqttDeliveryToken.getMessageId());
    }
}