MQTT的学习研究（十三) IBM MQTTV3 简单发布订阅实例

使用IBM MQTTv3实现相关的发布订阅功能

MQTTv3的发布消息的实现：

package com.etrip.mqttv3;

import com.ibm.micro.client.mqttv3.MqttClient;
import com.ibm.micro.client.mqttv3.MqttDeliveryToken;
import com.ibm.micro.client.mqttv3.MqttMessage;
import com.ibm.micro.client.mqttv3.MqttTopic;
/**
 * MQTTV3的发布消息类
 * 
 * @author longgangbai
 */
public class MQTTPub { 
	public static void doTest(){ 
		try { 
			MqttClient client = new MqttClient("tcp://192.168.208.46:1883","mqttserver-pub"); 
			MqttTopic topic = client.getTopic("tokudu/china"); 
			MqttMessage message = new MqttMessage("Hello World. Hello IBM".getBytes()); 
			message.setQos(1); 
			client.connect();
			while(true){
				MqttDeliveryToken token = topic.publish(message); 
				while (!token.isComplete()){ 
					token.waitForCompletion(1000); 
				} 
			}
		} catch (Exception e) { 
			e.printStackTrace(); 
		} 
	} 
} 

 MQTTV3的订阅消息类

package com.etrip.mqttv3;
import com.ibm.micro.client.mqttv3.MqttClient;
import com.ibm.micro.client.mqttv3.MqttConnectOptions;
/**
 * MQTTV3的订阅消息类
 * 
 * @author longgangbai
 */
public class MQTTSubsribe { 
	public static String doTest() { 
		try { 
			//创建MqttClient
			MqttClient client = new MqttClient("tcp://192.168.208.46:1883", "java_client0000000000"); 
			//回调处理类
			CallBack callback = new CallBack(); 
			client.setCallback(callback); 
			//创建连接可选项信息
			MqttConnectOptions conOptions = new MqttConnectOptions(); 
			//
			conOptions.setCleanSession(false); 
			//连接broker
			client.connect(conOptions); 
			//发布相关的订阅
			client.subscribe("tokudu/china", 1); 
			//client.disconnect(); 
		} catch (Exception e) { 
			e.printStackTrace(); 
			return "failed"; 
		} 
		return "success"; 
	} 
} 

 回调处理类处理订阅的消息类

package com.etrip.mqttv3;

import com.ibm.micro.client.mqttv3.MqttCallback;
import com.ibm.micro.client.mqttv3.MqttDeliveryToken;
import com.ibm.micro.client.mqttv3.MqttMessage;
import com.ibm.micro.client.mqttv3.MqttTopic;
/**
 * 回调处理类
 * 处理订阅的消息类
 * 
 * @author longgangbai
 */
public class CallBack implements MqttCallback { 
	
	public CallBack() { 
	} 
	/**
	 * 接收到信息的处理
	 */
	public void messageArrived(MqttTopic topic, MqttMessage message) { 
		try { 
			System.out.println(" MQTTSubsribe  message.toString()"+message.toString());
		} catch (Exception e) { 
			e.printStackTrace(); 
		} 
	} 
	public void connectionLost(Throwable cause) {
		
	} 
	public void deliveryComplete(MqttDeliveryToken token) {
		
	} 
} 

测试类：

package com.etrip.mqttv3;
/**
 * MQTTV3的测试类
 * 
 * @author longgangbai
 */
public class MQTTMain {
	public static void main(String[] args) {
		//订阅消息的方法
		MQTTSubsribe.doTest();
		//发布消息的类
		MQTTPub.doTest();
		
	}
}