mqtt/bs-loader/src/main/java/com/data/emqx/MqttSubscribeSample.java

package com.data.emqx;

/**
 * @author licd
 * @className MqttSubscribeSample
 * @description com.data.emqx
 * @date 2024/12/16 14:37
 */

import com.data.emqx.service.ILoaderCarDataSourceService;
import lombok.Synchronized;
import org.eclipse.paho.client.mqttv3.*;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

import java.text.SimpleDateFormat;
import java.util.Date;

@Component
public class MqttSubscribeSample {

    private static final Logger logger = (Logger) LoggerFactory.getLogger(MqttSubscribeSample.class);
    @Value("${emqx.username}")
    private String USERNAME;

    @Value("${emqx.password}")
    private String PASSWORD;
    @Value("${emqx.broker}")
    private String broker;
    @Value("${emqx.clientid}")
    private String clientId;
    @Value("${emqx.subscriptiontopic}")
    private String subscriptionTopic;

    @Value("${emqx.qos}")
    private String qos;
    @Value("${emqx.pubTopic}")
    private String pubTopic;

    @Autowired
    private ILoaderCarDataSourceService loaderCarDataSourceService;


    public  void  getEmqsData() {

       try {
            MqttClient sampleClient = new MqttClient(broker, clientId);
           // MQTT 连接选项
            MqttConnectOptions connOpts = new MqttConnectOptions();
            connOpts.setUserName(USERNAME);
            connOpts.setPassword(PASSWORD.toCharArray());
           // 保留会话
            connOpts.setCleanSession(true);
            // 建立连接
            sampleClient.connect(connOpts);
           // 订阅主题
            sampleClient.subscribe(subscriptionTopic);
            /*try{
                loaderCarDataSourceService.addLoaderCarDataSource(null);
            }catch (Exception e){
                logger.error("消息接收失败："+e.getMessage());
            }*/

           // 设置回调
            sampleClient.setCallback(new MqttCallback() {
                @Override
                public void connectionLost(Throwable cause) {
                    // 连接丢失后的回调
                    System.out.println("连接断开，可以做重连");
                }

                @Override
                public void  messageArrived(String topic, MqttMessage message) {
                    try {
                        // 接收到消息的回调
                        loaderCarDataSourceService.addLoaderCarDataSource(message.getPayload());
                        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
                        // 消息发布所需参数
                        MqttMessage message1 = new MqttMessage(("received success,received time:"+sdf.format(System.currentTimeMillis())).getBytes());
                        message.setQos(Integer.valueOf(qos));
                        // 发布消息
                        sampleClient.publish(pubTopic, message1);
                    }catch (Exception e){
                        logger.error("消息接收异常："+e.getMessage());
                        try {
                            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
                            // 消息发布所需参数
                            MqttMessage message1 = new MqttMessage(("received fail,received time:"+sdf.format(System.currentTimeMillis())).getBytes());
                            message.setQos(Integer.valueOf(qos));
                            // 发布消息
                            sampleClient.publish(pubTopic, message1);
                        }catch (Exception e2){
                            logger.error("消息响应异常："+e2.getMessage());
                        }
                    }

                }

                @Override
                public void deliveryComplete(IMqttDeliveryToken token) {
                    // 消息发送成功的回调
                    /**
                     * 消息发布完成且收到ack确认后的回调
                     * QoS0：消息被网络发出后触发一次
                     * QoS1：当收到broker的PUBACK消息后触发
                     * QoS2：当收到broer的PUBCOMP消息后触发
                     */
                    System.out.println("deliveryComplete---------"+ token.isComplete());
                }
            });


        } catch (MqttException me) {
           logger.error("reason " + me.getReasonCode());
           logger.error("msg " + me.getMessage());
           logger.error("loc " + me.getLocalizedMessage());
           logger.error("cause " + me.getCause());
           logger.error("excep " + me);
            me.printStackTrace();
        }






       /* String HOST = "tcp://124.71.134.146:1883";
        String TOPIC = "emqx_topic";
        int qos =2;
        String clientid = "emqx_clientid";
        String userName = "test";
        String passWord = "test";
        try {
            // host为主机名，test为clientid即连接MQTT的客户端ID，一般以客户端唯一标识符表示，MemoryPersistence设置clientid的保存形式，默认为以内存保存
            MqttClient client = new MqttClient(HOST, clientid, new MemoryPersistence());

            // MQTT的连接设置
            MqttConnectOptions options = new MqttConnectOptions();
            // 设置是否清空session,这里如果设置为false表示服务器会保留客户端的连接记录，这里设置为true表示每次连接到服务器都以新的身份连接
            options.setCleanSession(true);
            // 设置连接的用户名
            options.setUserName(userName);
            // 设置连接的密码
            options.setPassword(passWord.toCharArray());
            // 设置超时时间 单位为秒
            options.setConnectionTimeout(10);
            // 设置会话心跳时间 单位为秒 服务器会每隔1.5*20秒的时间向客户端发送个消息判断客户端是否在线，但这个方法并没有重连的机制
            options.setKeepAliveInterval(20);
            // 自动重连
            options.setAutomaticReconnect(true);

            // 设置回调函数
            client.setCallback(new MqttCallback() {

                public void connectionLost(Throwable cause) {
                    // 连接丢失后，一般在这里面进行重连
                    System.out.println("连接断开，可以做重连");
                }

                public void messageArrived(String topic, MqttMessage message) throws Exception {
                    *//**
                     * 订阅到消息后的回调
                     * 该方法由mqtt客户端同步调用，在此方法未正确返回之前，不会发送ack确认消息到broker
                     * 一旦该方法向外抛出了异常客户端将异常关闭，当再次连接时；所有QoSl,QoS2且客户端未进行ack确认的消息都将由
                     * broker服务器再次发送到客户端
                     *//*
                    System.out.println("messageId:" +message.getId());
                    System.out.println("接收消息主题:" + topic);
                    System.out.println("接收消息Qos:" + message.getQos());
                    System.out.println("接收消息内容:" + new String(message.getPayload()));
                    System.out.println();
                }

                public void deliveryComplete(IMqttDeliveryToken token) {
                    *//**
                     * 消息发布完成且收到ack确认后的回调
                     * QoS0：消息被网络发出后触发一次
                     * QoS1：当收到broker的PUBACK消息后触发
                     * QoS2：当收到broer的PUBCOMP消息后触发
                     *//*
                    System.out.println("deliveryComplete---------"+ token.isComplete());
                }

            });

            // 建立连接
            client.connect(options);

            //订阅消息
            client.subscribe(TOPIC, qos);
        } catch (Exception e) {
            e.printStackTrace();
        }*/
    }
}