mqtt压力测试工具emqtt

参考：https://blog.csdn.net/frankcheng5143/article/details/52045501

1.emqtt下载地址：http://emqtt.com/downloads，找到自己要下载的版本信息，注意开发版、稳定版；

2.下载后放到硬盘根目录，进入下载路径目录，cmd进入dos窗口，如下图：

3.输入.\bin\emqttd consloe,之后弹出启动状态页面，代表启动成功；

4.登录：地址 ：http://localhost:18083/ 

              用户名为：admin   密码为：public

登录上去就可以看服务器的运行状态了。

测试
依赖

<dependency>
        <groupId>org.eclipse.paho</groupId>
        <artifactId>org.eclipse.paho.client.mqttv3</artifactId>
        <version>1.0.2</version>
    </dependency>

Server

package com.mymqtt.myemqtt;

import java.util.Scanner;

import org.eclipse.paho.client.mqttv3.MqttClient;
import org.eclipse.paho.client.mqttv3.MqttConnectOptions;
import org.eclipse.paho.client.mqttv3.MqttMessage;

public class Server {

    public static void main(String[] args) throws Exception {
        String host = "tcp://127.0.0.1:1883";
        String topic = "hello";
        String clientId = "server";// clientId不能重复
        MqttConnectOptions options = new MqttConnectOptions();
        options.setCleanSession(true);

        MqttClient client = new MqttClient(host, clientId);
        client.connect(options);

        MqttMessage message = new MqttMessage();

        @SuppressWarnings("resource")
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入要发送的内容：");
        while (true) {
            String line = scanner.nextLine();
            message.setPayload(line.getBytes());
            client.publish(topic, message);
        }

    }
}

Client

package com.mymqtt.myemqtt;

import org.eclipse.paho.client.mqttv3.MqttClient;
import org.eclipse.paho.client.mqttv3.MqttConnectOptions;

public class Client {

    public static void main(String[] args) throws Exception {

        String host = "tcp://127.0.0.1:1883";
        String topic = "hello";
        String clientId = "12345";// clientId不能重复
        // 1.设置mqtt连接属性
        MqttConnectOptions options = new MqttConnectOptions();
        options.setCleanSession(true);
        // 2.实例化mqtt客户端
        MqttClient client = new MqttClient(host, clientId);
        // 3.连接
        client.connect(options);

        client.setCallback(new PushCallback());
        while (true) {
            client.subscribe(topic, 2);
        }
        // client.disconnect();
    }
}

PushCallback

package com.mymqtt.myemqtt;

import java.util.Date;

import org.eclipse.paho.client.mqttv3.IMqttDeliveryToken;
import org.eclipse.paho.client.mqttv3.MqttCallback;
import org.eclipse.paho.client.mqttv3.MqttMessage;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class PushCallback implements MqttCallback {
    private final Logger logger = LoggerFactory.getLogger(this.getClass());

    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");
        logger.info("掉线时间:{}", new Date());
    }

    public void deliveryComplete(IMqttDeliveryToken token) {
        System.out.println("deliveryComplete---------" + token.isComplete());
    }

    public void messageArrived(String topic, MqttMessage message) throws Exception {
        // subscribe后得到的消息会执行到这里面
        // System.out.println(message);
        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()));
    }

}

结果：

控制台显示

两个连接

参考资料：http://emqtt.com/