mqtt服务搭建

来源：互联网发布：苏州php培训编辑：程序博客网时间：2024/06/05 01:11

MQTT是IBM推出的一种针对移动终端设备的基于TCP/IP的发布/预订协议，可以连接大量的远程传感器和控制设备。

MQTT的官网见：http://mqtt.org/。其中http://mqtt.org/software里面提供了官方推荐的各种服务器和客户端使用的各种语言版本的API。

1.下载地址

http://activemq.apache.org/apollo/download.html

1、在这里下载Apollo服务器，下载后解压目录：D:\pfsoft\apache-apollo-1.7.1

2、create mybroker之后会在bin目录下生成mybroker文件夹 D:\pfsoft\apache-apollo-1.7.1\bin>apollo create mybroker
D:\pfsoft\apache-apollo-1.7.1\bin\mybroker\bin>apollo-broker run

3. 登录 http://127.0.0.1:61680/查看是否安装成功用户名密码：admin password

生产者

package com.pf.domain;

import java.awt.Container;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;

import org.eclipse.paho.client.mqttv3.IMqttDeliveryToken;
import org.eclipse.paho.client.mqttv3.MqttCallback;
import org.eclipse.paho.client.mqttv3.MqttClient;
import org.eclipse.paho.client.mqttv3.MqttConnectOptions;
import org.eclipse.paho.client.mqttv3.MqttDeliveryToken;
import org.eclipse.paho.client.mqttv3.MqttMessage;
import org.eclipse.paho.client.mqttv3.MqttTopic;
import org.eclipse.paho.client.mqttv3.persist.MemoryPersistence;

public class Server extends JFrame {
private static final long serialVersionUID = 1L;
private JPanel panel;
private JButton button;

private MqttClient client;
private String host = "tcp://127.0.0.1:61613";
// private String host = "tcp://localhost:1883";
private String userName = "admin";
private String passWord = "password";
private MqttTopic topic;
private MqttMessage message;

private String myTopic = "test/topic2";

public Server() {

try {
client = new MqttClient(host, "Server",
new MemoryPersistence());
connect();
} catch (Exception e) {
e.printStackTrace();
}

Container container = this.getContentPane();
panel = new JPanel();
button = new JButton("发布话题");
button.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent ae) {
try {
MqttDeliveryToken token = topic.publish(message);
token.waitForCompletion();
System.out.println(token.isComplete()+"========");
} catch (Exception e) {
e.printStackTrace();
}
}
});
panel.add(button);
container.add(panel, "North");

}

private void connect() {

MqttConnectOptions options = new MqttConnectOptions();
options.setCleanSession(false);
options.setUserName(userName);
options.setPassword(passWord.toCharArray());
// 设置超时时间
options.setConnectionTimeout(10);
// 设置会话心跳时间
options.setKeepAliveInterval(20);
try {
client.setCallback(new MqttCallback() {

public void connectionLost(Throwable cause) {
System.out.println("connectionLost-----------");
}

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

public void messageArrived(String topic, MqttMessage arg1)
throws Exception {
System.out.println("messageArrived----------");

}
});

topic = client.getTopic(myTopic);

message = new MqttMessage();
message.setQos(1);
message.setRetained(true);
System.out.println(message.isRetained()+"------ratained状态");
message.setPayload("publish1-eeeeeaaaaaawwwwww---".getBytes());

client.connect(options);
} catch (Exception e) {
e.printStackTrace();
}

}

public static void main(String[] args) {
Server s = new Server();
s.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
s.setSize(600, 370);
s.setLocationRelativeTo(null);
s.setVisible(true);
}
}

消费者

package com.pf.domain;

import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;

import org.eclipse.paho.client.mqttv3.IMqttDeliveryToken;
import org.eclipse.paho.client.mqttv3.MqttCallback;
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;

public class Consumer {
private String host = "tcp://127.0.0.1:61613";
private String userName = "admin";
private String passWord = "password";

private static MqttClient client;

private static String myTopic = "test/topic1";

private MqttConnectOptions options;

private ScheduledExecutorService scheduler;

private void init() {

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
client = new MqttClient(host, "test",
new MemoryPersistence());
//MQTT的连接设置
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);

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

@Override
public void connectionLost(Throwable cause) {
//连接丢失后，一般在这里面进行重连
connect();
System.out.println("connectionLost----------");
}

@Override
public void deliveryComplete(IMqttDeliveryToken token) {
//publish后会执行到这里
System.out.println("deliveryComplete---------"
+ token.isComplete());
}

@Override
public void messageArrived(String topicName, MqttMessage message)
throws Exception {
//subscribe后得到的消息会执行到这里面
System.out.println("messageArrived----------");
System.out.println(topicName+"---"+message.toString());

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

private void connect() {
new Thread(new Runnable() {

@Override
public void run() {
try {
client.connect(options);
} catch (Exception e) {
e.printStackTrace();
}
}
}).start();
}

private void startReconnect() {
scheduler = Executors.newSingleThreadScheduledExecutor();
scheduler.scheduleAtFixedRate(new Runnable() {

@Override
public void run() {
if(!client.isConnected()) {
connect();
}
}
}, 0 * 1000, 1 * 1000, TimeUnit.MILLISECONDS);
}
public static void main(String[] args) {
Consumer c =new Consumer();
c.startReconnect();
c.init();
try {
client.subscribe(myTopic, 1);
} catch (MqttException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

}

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