MQTT的学习研究（十二） MQTT moquette 的 Future API 消息发布订阅的实现

 MQTT moquette 的Server发布主题

package com.etrip.mqtt.future;

import java.net.URISyntaxException;

import org.fusesource.mqtt.client.FutureConnection;
import org.fusesource.mqtt.client.MQTT;
import org.fusesource.mqtt.client.QoS;
import org.fusesource.mqtt.client.Topic;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 *
 *
 *
 * 采用Future式 发布主题
 *
 * @author longgangbai
 */
public class MQTTFutureServer {
        private static final Logger LOG = LoggerFactory.getLogger(MQTTFutureServer.class);
        private final static String CONNECTION_STRING = "tcp://192.168.208.46:1883";
        private final static boolean CLEAN_START = true;
        private final static short KEEP_ALIVE = 30;// 低耗网络，但是又需要及时获取数据，心跳30s
        public  static Topic[] topics = {
                        new Topic("china/beijing", QoS.EXACTLY_ONCE),
                        new Topic("china/tianjin", QoS.AT_LEAST_ONCE),
                        new Topic("china/henan", QoS.AT_MOST_ONCE)};
        public final  static long RECONNECTION_ATTEMPT_MAX=6;
        public final  static long RECONNECTION_DELAY=2000;

        public final static int SEND_BUFFER_SIZE=2*1024*1024;//发送最大缓冲为2M
        public static void main(String[] args)   {
            MQTT mqtt = new MQTT();
            try {
                //设置服务端的ip
                mqtt.setHost(CONNECTION_STRING);
                //连接前清空会话信息
                mqtt.setCleanSession(CLEAN_START);
                //设置重新连接的次数
                mqtt.setReconnectAttemptsMax(RECONNECTION_ATTEMPT_MAX);
                //设置重连的间隔时间
                mqtt.setReconnectDelay(RECONNECTION_DELAY);
                //设置心跳时间
                mqtt.setKeepAlive(KEEP_ALIVE);
                //设置缓冲的大小
                mqtt.setSendBufferSize(SEND_BUFFER_SIZE);

                //创建连接
                final FutureConnection connection= mqtt.futureConnection();
                connection.connect();
                int count=1;
                while(true){
                    count++;
                    // 用于发布消息，目前手机段不需要向服务端发送消息
                    //主题的内容
                    String message="hello "+count+"chinese people !";
                    String topic = "china/beijing";
                    connection.publish(topic, message.getBytes(), QoS.AT_LEAST_ONCE,
                            false);
                    System.out.println("MQTTFutureServer.publish Message "+"Topic Title :"+topic+" context :"+message);

                }
            } catch (URISyntaxException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (Exception e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
}

 MQTT moquette 的Client接收主题

package com.etrip.mqtt.future;

import java.net.URISyntaxException;

import org.fusesource.mqtt.client.Future;
import org.fusesource.mqtt.client.FutureConnection;
import org.fusesource.mqtt.client.MQTT;
import org.fusesource.mqtt.client.Message;
import org.fusesource.mqtt.client.QoS;
import org.fusesource.mqtt.client.Topic;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
 *
 * MQTT moquette 的Client 段用于订阅主题，并接收主题信息
 *
 * 采用Future 式 订阅主题
 *
 * @author longgangbai
 */
public class MQTTFutureClient {
        private static final Logger LOG = LoggerFactory.getLogger(MQTTFutureClient.class);
        private final static String CONNECTION_STRING = "tcp://192.168.208.46:1883";
        private final static boolean CLEAN_START = true;
        private final static short KEEP_ALIVE = 30;// 低耗网络，但是又需要及时获取数据，心跳30s
        private final static String CLIENT_ID = "publishService";
        public  static Topic[] topics = {
                        new Topic("china/beijing", QoS.EXACTLY_ONCE),
                        new Topic("china/tianjin", QoS.AT_LEAST_ONCE),
                        new Topic("china/henan", QoS.AT_MOST_ONCE)};
        public final  static long RECONNECTION_ATTEMPT_MAX=6;
        public final  static long RECONNECTION_DELAY=2000;

        public final static int SEND_BUFFER_SIZE=2*1024*1024;//发送最大缓冲为2M


          public static void main(String[] args)   {
                //创建MQTT对象
                MQTT mqtt = new MQTT();
                try {
                    //设置mqtt broker的ip和端口
                    mqtt.setHost(CONNECTION_STRING);
                    //连接前清空会话信息
                    mqtt.setCleanSession(CLEAN_START);
                    //设置重新连接的次数
                    mqtt.setReconnectAttemptsMax(RECONNECTION_ATTEMPT_MAX);
                    //设置重连的间隔时间
                    mqtt.setReconnectDelay(RECONNECTION_DELAY);
                    //设置心跳时间
                    mqtt.setKeepAlive(KEEP_ALIVE);
                    //设置缓冲的大小
                    mqtt.setSendBufferSize(SEND_BUFFER_SIZE);

                    //获取mqtt的连接对象BlockingConnection
                    final FutureConnection connection= mqtt.futureConnection();
                    connection.connect();
                    connection.subscribe(topics);
                    while(true){
                        Future<Message> futrueMessage=connection.receive();
                        Message message =futrueMessage.await();


                        System.out.println("MQTTFutureClient.Receive Message "+ "Topic Title :"+message.getTopic()+" context :"+String.valueOf(message.getPayloadBuffer()));
                    }
                } catch (URISyntaxException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } catch (Exception e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }finally{

                }
            }
}