mosquitto MQTT安装测试

测试环境为centOS 7

#安装libwebsockets
wget https://dl.fedoraproject.org/pub/epel/7/x86_64/Packages/l/libwebsockets-1.7.5-1.el7.x86_64.rpm
rpm -ivh libwebsockets-1.7.5-1.el7.x86_64.rpm

#安装mosquitto
wget https://download.opensuse.org/repositories/home:/oojah:/mqtt/CentOS_CentOS-7/home:oojah:mqtt.repo
mv home\:oojah\:mqtt.repo /etc/yum.repos.d/mosquitto.repo
yum install mosquitto mosquitto-clients
cd /etc/mosquitto/
cp mosquitto.conf.example conf.d/mosquitto.conf
vim conf.d/mosquitto.conf
# 修改内容为： allow_anonymous false
#password_file /etc/mosquitto/pwfile
cp pwfile.example pwfile
#创建admin用户
mosquitto_passwd -c /etc/mosquitto/pwfile admin
#使用【mosquitto -c /etc/mosquitto/mosquitto.conf -d 】可以后台运行，第一次启用不要加-d，这样如果运行出错可以立即看到反馈
mosquitto -c /etc/mosquitto/mosquitto.conf
#测试
mosquitto_pub -t test -u admin -P password -m "ok"
mosquitto_sub -t test -u admin -P password
# 如果sub收到ok说明测试成功

Publisher

package server;

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

public class Publisher {

  /**
   * 代理服务器ip地址
   */
//  public static final String MQTT_BROKER_HOST = "tcp://192.168.1.236:61613";  //apollo
  public static final String MQTT_BROKER_HOST = "tcp://192.168.1.236:1883";

  /**
   * 订阅标识
   */
  public static final String MQTT_TOPIC = "testTopic";
  /**
   * 客户端唯一标识
   */
  public static final String MQTT_CLIENT_ID = "publisher01";
  private static String userName = "admin";
  private static String password = "password";
  private static MqttTopic topic;
  private static MqttClient client;

  public static void main(String... args) {
    // 推送消息

    try {
      client = new MqttClient(MQTT_BROKER_HOST, MQTT_CLIENT_ID, new MemoryPersistence());
      MqttConnectOptions options = new MqttConnectOptions();
      options.setCleanSession(false);
      options.setUserName(userName);
      options.setPassword(password.toCharArray());
      options.setConnectionTimeout(10);
      options.setKeepAliveInterval(20);

      topic = client.getTopic(MQTT_TOPIC);

      client.connect(options);
      client.setCallback(new MqttCallback() {

        @Override public void connectionLost(Throwable throwable) {
          System.out.println("连接断开,正在重连......");
          try {
            client.connect(options);
          }catch (Exception exception){
            System.out.println(exception.getMessage());
          }
        }

        @Override public void messageArrived(String s, MqttMessage mqttMessage) throws Exception {
        }

        @Override public void deliveryComplete(IMqttDeliveryToken iMqttDeliveryToken) {
        }
      });
      int i=0;
      while (true) {
        MqttMessage message = new MqttMessage();
        //0 最多一次传送 (只负责传送，发送过后就不管数据的传送情况)
        //1 至少一次传送 (确认数据交付)
        //2 正好一次传送 (保证数据交付成功)
        message.setQos(2);
        message.setRetained(true);
        message.setPayload((""+i++).getBytes());
        MqttDeliveryToken token = topic.publish(message);
        token.waitForCompletion();
        System.out.println(i);
        Thread.sleep(1000);
      }

    } catch (Exception e) {
      e.printStackTrace();
    }
  }
}

Subscriber

package client;

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

public class Subscriber {

  /**
   * 代理服务器ip地址
   */
//  public static final String MQTT_BROKER_HOST = "tcp://192.168.1.236:61613";
  public static final String MQTT_BROKER_HOST = "tcp://192.168.1.236:1883";

  /**
   * 客户端唯一标识
   */
  public static final String MQTT_CLIENT_ID = "subscriber01";

  /**
   * 订阅标识
   */
  public static final String MQTT_TOPIC = "testTopic";

  /**
   *
   */
  public static final String USERNAME = "admin";
  /**
   * 密码
   */
  public static final String PASSWORD = "password";

  private volatile static MqttClient mqttClient;
  private static MqttConnectOptions options;

  public static void main(String... args) {
    try {
      // host为主机名，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 = new MqttClient(MQTT_BROKER_HOST, MQTT_CLIENT_ID, new MemoryPersistence());
      // 配置参数信息
      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(false);
      // 设置用户名
      options.setUserName(USERNAME);
      // 设置密码
      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);
      // 连接
      mqttClient.connect(options);
      // 订阅
      mqttClient.subscribe(MQTT_TOPIC);
      // 设置回调
      mqttClient.setCallback(new MqttCallback() {

        @Override public void connectionLost(Throwable throwable) {
          // 连接丢失后，一般在这里面进行重连
          System.out.println("连接断开,正在重连......");
          try {
            mqttClient.connect(options);
          }catch (Exception exception){
            exception.printStackTrace();
          }
        }

        @Override public void messageArrived(String s, MqttMessage mqttMessage) throws Exception {
          System.out.println("toppic:"+s+"\t message:\t"+ mqttMessage.toString());
        }

        @Override public void deliveryComplete(IMqttDeliveryToken iMqttDeliveryToken) {

        }
      });
    } catch (Exception e) {
      e.printStackTrace();
    }

  }

}

mosquitto MQTT安装测试

Publisher

Subscriber

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