MqttConsumerConfig.java 3.8 KB
package com.skua.modules.remotemeeting.mqtt;

import com.skua.modules.remotemeeting.service.IRemoteMeetingService;
import com.skua.tool.util.UniqIdUtils;
import lombok.extern.slf4j.Slf4j;
import org.eclipse.paho.client.mqttv3.MqttClient;
import org.eclipse.paho.client.mqttv3.MqttConnectOptions;
import org.eclipse.paho.client.mqttv3.MqttException;
import org.eclipse.paho.client.mqttv3.persist.MemoryPersistence;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Configuration;
import org.springframework.stereotype.Service;

import javax.annotation.PostConstruct;

@Configuration
@Service
@Slf4j
public class MqttConsumerConfig {

    @Value("${ar-remote-meeting.mqtt-url}")
    private String hostUrl;

    @Autowired
    IRemoteMeetingService remoteMeetingService;

    /**
     * 客户端对象
     */
    private MqttClient client;

    /**
     * 在bean初始化后连接到服务器
     */
    @PostConstruct
    public void init(){
        connect();
    }

    /**
     * 客户端连接服务端
     */
    public void connect(){
        try {
            // clientId保证在多个连接中唯一,不然出现java.io.EOFException: null (a client identifier that is unique on the server being connected to)
            String clientId = "jk_mqtt_client_5af98f9b" + UniqIdUtils.getInstance().getUniqID();
            //创建MQTT客户端对象
            client = new MqttClient(hostUrl,clientId,new MemoryPersistence());
            //连接设置
            MqttConnectOptions options = new MqttConnectOptions();
            //是否清空session,设置为false表示服务器会保留客户端的连接记录,客户端重连之后能获取到服务器在客户端断开连接期间推送的消息
            //设置为true表示每次连接到服务端都是以新的身份
            options.setCleanSession(false);
            //设置连接用户名
//            options.setUserName(username);
            //设置连接密码
//            options.setPassword(password.toCharArray());
            //设置超时时间,单位为秒
            options.setConnectionTimeout(100);
            //设置心跳时间 单位为秒,表示服务器每隔1.5*20秒的时间向客户端发送心跳判断客户端是否在线
            options.setKeepAliveInterval(20);
            //断开后自动重连
            options.setAutomaticReconnect(true);
            //设置遗嘱消息的话题,若客户端和服务器之间的连接意外断开,服务器将发布客户端的遗嘱信息
            options.setWill("willTopic",(clientId + "与服务器断开连接").getBytes(),0,false);
            //设置回调
            client.setCallback(new MqttConsumerCallBack(this.remoteMeetingService, client));
            client.connect(options);
            //订阅主题
            //消息等级,和主题数组一一对应,服务端将按照指定等级给订阅了主题的客户端推送消息
            int[] qos = {1,1};
            //主题
            String[] topics = {"room/#","topic2"};
          	//订阅主题
            client.subscribe(topics,qos);

            log.info("第三方远程AR会议:mqtt连接成功!!!!!!!");
        } catch (MqttException e) {
            e.printStackTrace();
        }
    }

    /**
     * 主动断开与服务器之间的连接
     */
    public void disConnect(){
        try {
            client.disconnect();
        } catch (MqttException e) {
            e.printStackTrace();
        }
    }


    /**
     * 订阅主题
     */
    public void subscribe(String topic,int qos){
        try {
            client.subscribe(topic,qos);
        } catch (MqttException e) {
            e.printStackTrace();
        }
    }
}