package com.zy.sc.common.mqtt;

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.MqttMessage;
import org.eclipse.paho.client.mqttv3.persist.MemoryPersistence;

/**
 * Created by vincent on 2021/9/15
 */
public class PublishSample {

    public static void main(String[] args) {

        String topic = "CROSSWALK_DOWN_TEST_866156056763090";
//        String content = "{\"event\":\"lbs\",\"serial\":\"903597431105519616\"}";
        String content = "hello world";
        int qos = 0;
        String broker = "tcp://iot.emperyland.com:61613";
        String userName = "admin";
        String password = "xltys1995";
        String clientId = "dz-admin1";
        // 内存存储
        MemoryPersistence persistence = new MemoryPersistence();

        try {
            // 创建客户端
            MqttClient sampleClient = new MqttClient(broker, clientId, persistence);
            // 创建链接参数
            MqttConnectOptions connOpts = new MqttConnectOptions();
            // 在重新启动和重新连接时记住状态
            connOpts.setCleanSession(false);
            // 设置连接的用户名
            connOpts.setUserName(userName);
            connOpts.setPassword(password.toCharArray());
            // 建立连接
            sampleClient.connect(connOpts);
            // 创建消息
            MqttMessage message = new MqttMessage(content.getBytes());
            // 设置消息的服务质量
            message.setQos(qos);
            // 发布消息
            sampleClient.publish(topic, message);
            // 断开连接
            sampleClient.disconnect();
            // 关闭客户端
            sampleClient.close();
        } catch (MqttException me) {
            System.out.println("reason " + me.getReasonCode());
            System.out.println("msg " + me.getMessage());
            System.out.println("loc " + me.getLocalizedMessage());
            System.out.println("cause " + me.getCause());
            System.out.println("excep " + me);
            me.printStackTrace();
        }
    }

}