使用阿里云消息队列

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Java

mq 消息队列 MQ

使用阿里云消息队列

控制台地址:http://ons.console.aliyun.com/#/home/topic

(1)生成Producer ID

点击"申请发布"

示例代码:

package com.alibaba.ons.demo;

import java.util.Properties;

import com.aliyun.openservices.ons.api.Message;
import com.aliyun.openservices.ons.api.ONSFactory;
import com.aliyun.openservices.ons.api.Producer;
import com.aliyun.openservices.ons.api.PropertyKeyConst;
import com.aliyun.openservices.ons.api.SendResult;

public class ProducerClient {

    public static void main(String[] args) {
       Properties properties = new Properties();
       properties.put(PropertyKeyConst.ProducerId, "PID_whuang");
       properties.put(PropertyKeyConst.AccessKey, "请输入AccessKey");
       properties.put(PropertyKeyConst.SecretKey, "请输入SecretKey");
       Producer producer = ONSFactory.createProducer(properties);
           
       //在发送消息前，必须调用start方法来启动Producer，只需调用一次即可。
       producer.start();
       Message msg = new Message(
            //Message Topic
            "com_hbjltv", 
            //Message Tag,
            //可理解为Gmail中的标签，对消息进行再归类，方便Consumer指定过滤条件在ONS服务器过滤        
            "TagA",
            //Message Body
            //任何二进制形式的数据，ONS不做任何干预，需要Producer与Consumer协商好一致的序列化和反序列化方式
            "Hello ONS".getBytes()
        );
        
        // 设置代表消息的业务关键属性，请尽可能全局唯一。
        // 以方便您在无法正常收到消息情况下，可通过ONS Console查询消息并补发。
        // 注意：不设置也不会影响消息正常收发
        msg.setKey("ORDERID_100");
        
        //发送消息，只要不抛异常就是成功
        SendResult sendResult = producer.send(msg);
        System.out.println(sendResult);

        // 在应用退出前，销毁Producer对象
        // 注意：如果不销毁也没有问题
        producer.shutdown();
    }
}

(2)生成Consumer ID

点击"申请订阅"

示例代码:

public class ConsumerTest {
    public static void main(String[] args) {
        Properties properties = new Properties();
        properties.put(PropertyKeyConst.ConsumerId, "CID_tv_mobile");
        properties.put(PropertyKeyConst.AccessKey, "请输入AccessKey");
        properties.put(PropertyKeyConst.SecretKey, "请输入SecretKey");
        Consumer consumer = ONSFactory.createConsumer(properties);
        consumer.subscribe("com_hbjltv", "*", new MessageListener() {
            public Action consume(Message message, ConsumeContext context) {
                System.out.println("Receive: " + message);
                return Action.CommitMessage;
            }
        });
        consumer.start();
        System.out.println("Consumer Started");
    }
}

(3) clientId 的限制

阿里云消息队列对clientId的名称有严格限制:

(a)必须以申请的Consumer ID 开头,后面跟@@@,接着跟用于区分客户端的标志,

例如:

CID_tv_mobile@@@86458fd 是合法的

CID_tv_mobile@@86458fd 是非法的,因为只有两个@

(b)总长度不能超过23个字符

例如

CID_tv_mobile@@@86458_A是合法的

CID_tv_mobile@@@86458_Ab是非法的,因为超过了23个字符

(4)在手机端(客户端)增加订阅逻辑

package com.service;

import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;

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.internal.MemoryPersistence;

import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.IBinder;

import com.common.util.SystemHWUtil;
import com.dict.Constants3;
import com.jianli.R;
import com.push.PushCallback;
import com.string.widget.util.ValueWidget;
import com.util.MacSignature;
import com.util.ShopUtil;

/**
 * @author Dominik Obermaier
 */
public class MQTTService extends Service {

	// public static final String BROKER_URL =
	// "tcp://broker.mqttdashboard.com:1883";
	// public static String BROKER_URL = "tcp://172.16.15.50:1883";
	public static String BROKER_URL_FORMAT = "tcp://%s:%s";
	// public static final String BROKER_URL = "tcp://test.mosquitto.org:1883";

	/*
	 * In a real application, you should get an Unique Client ID of the device
	 * and use this, see
	 * http://android-developers.blogspot.de/2011/03/identifying
	 * -app-installations.html
	 */
	public static String clientId = null;

	/**
	 * 不能含有英文句点,可以包含下划线
	 */
	public static final String TOPIC = "com_hbjltv";
	private MqttClient mqttClient;
//	private String ip="182.92.80.122";
	/***
	 * 是否连接上activeMQ
	 */
	private boolean online = false;
	boolean isAliyun=false;

	public IBinder onBind(Intent intent) {
		return null;
	}

	@Override
	public void onCreate() {
		super.onCreate();
	}

	private MqttClient createMqttClient(String serverURL, String clientId) throws MqttException{
		return new MqttClient(serverURL, clientId,
				new MemoryPersistence());
	}
	/***
	 * 
	 * @param serverURL
	 * @param clientId
	 *            : 最大长度:23
	 * @param isAllowOffline
	 * @param username
	 * @param password
	 * @throws MqttException
	 */
	private void connectAndSubscribe(String serverURL, String clientId,
	/* String topicFilter, */boolean isAllowOffline, String username,
			String password) throws MqttException {
		
		if(isAliyun){
			if(!ShopUtil.validateClientId(getApplicationContext(), clientId)){
				return;
			}
		}
		mqttClient = createMqttClient(serverURL, clientId);
		MqttConnectOptions options = new MqttConnectOptions();
		options.setCleanSession(!isAllowOffline);// mqtt receive offline message
		if (ValueWidget.isNullOrEmpty(username)) {
			username = null;
		}
		String sign=null;
		if(isAliyun){
        	try {
				sign = MacSignature.macSignature(Constants3.CONSUMER_ID_TV, password);
				password=sign;
			} catch (InvalidKeyException e) {
				e.printStackTrace();
			} catch (NoSuchAlgorithmException e) {
				e.printStackTrace();
			}
        	
        }
		if (ValueWidget.isNullOrEmpty(password)) {
			password = null;
		} else {
			options.setPassword(password.toCharArray());
		}
		options.setUserName(username);
		options.setConnectionTimeout(10);
		options.setKeepAliveInterval(10);
		if(null==mqttClient){//点击HOME键,过很长时间,再点击应用时,mqttClient为null
			mqttClient = createMqttClient(serverURL, clientId);
		}
		mqttClient.setCallback(new PushCallback(this));
		boolean isSuccess=false;
		mqttClient.connect(options);
		isSuccess=true;
		// Subscribe to all subtopics of homeautomation
		// mqttClient.subscribe(topicFilter);
		if(null==mqttClient){//点击HOME键,过很长时间,再点击应用时,mqttClient为null
			mqttClient = createMqttClient(serverURL, clientId);
		}
		if(isAliyun){
    		final String p2ptopic = TOPIC+"/p2p/";
    		//同时订阅两个topic，一个是基于标准mqtt协议的发布订阅模式，一个是扩展的点对点推送模式
    		final String[] topicFilters=new String[]{TOPIC,p2ptopic};
    		mqttClient.subscribe(topicFilters);
    	}else{
    		mqttClient.subscribe(new String[] { TOPIC, clientId });
		}
	}

	@Override
	public void onStart(Intent intent, int startId) {
		final boolean isRestart=intent.getBooleanExtra("isRestart", false);
		ShopUtil.logger2("restart MQTT service:"+isRestart);
		// super.onStart(intent, startId);
//		if (intent == null) {//重启服务时intent 确实为空
		
//			Log.d(Constants.LOG_TAG, "intent is null");
//			return;
//		}
		Context context = getApplicationContext();
		clientId = ShopUtil.getIMEI(context);
		// Bundle bundle=intent.getExtras();
		// String ip=bundle.getString(Constants.ACTIVEMQ_IP);
//		final String ip = context.getString(R.string.pushserver_ip);
		SharedPreferences preferences = getApplicationContext()
				.getSharedPreferences(Constants3.SHAREDPREFERENCES_NAME,
						Context.MODE_PRIVATE);
		final String ip ="mqtt.ons.aliyun.com";// preferences.getString("pushserver_ip", context.getString(R.string.pushserver_ip));
		final String port = preferences.getString("pushserver_port", "1883");
		isAliyun=SystemHWUtil.parse2Boolean(preferences.getString("is_aliyun_mq_ONS", "false"));
		// String topic=bundle.getString(Constants.ACTIVEMQ_TOPIC);
		 System.out.println("push ip:"+ip);
		new Thread(new Runnable() {
			/****
			 * 尝试连接的次数,为什么要尝试连接几次那?
			 * (1)无wifi时启动,则肯定连接失败,所以尝试连接三次,只要在这个期间启动wifi就可以连接上activeMQ;<br />
			 * (2)之前连接上,然后断开wifi,然后又启动wifi,<br />
			 * 这时容易报 "Broker unavailable"异常,暂时不清楚原因,所以也需要继续尝试连接;<br />
			 * 
			 */
			private int tryTime = 5;

			@Override
			public void run() {
				System.out.println(tryTime+","+mqttClient+","+isOnline() );
				while (tryTime > 0
						&& (!isOnline() || mqttClient == null || (!mqttClient
								.isConnected())||isRestart)) {
					try {
						ShopUtil.logger2("start push service");
						ShopUtil.logger2("push server:"+ip);
						String prefix=Constants3.CONSUMER_ID_TV+"@@@";
						int remainingLength=23-prefix.length();
						String suffix=null;
						if(clientId.length()>remainingLength){
							suffix=clientId.substring(0,remainingLength);
						}else{
							suffix=clientId;
						}
						String clientId2=prefix+suffix;
						connectAndSubscribe(String.format(
								MQTTService.BROKER_URL_FORMAT, ip, port),
								clientId2, /* topic, */true, ""/*自己申请的access key*/, ""/*secret*/);
						 ShopUtil.logger2("clientId:" + clientId2);
						ShopUtil.logger2("succeed to connect to activeMQ");
						setOnline(true);
					} catch (MqttException e) {
						setOnline(false);
						mqttClient=null;
						 e.printStackTrace();
						ShopUtil.logger2("抛异常:"+e.getMessage());
						ShopUtil.logger2("ip:" + ip + " ,port:" + port);
						try {
							Thread.sleep(10000);
						} catch (InterruptedException e1) {
							e1.printStackTrace();
						}
					}
					tryTime--;
				}

			}
		}).start();
//		new Thread(new Runnable() {
//			@Override
//			public void run() {
//				System.out.println("start:"+System.currentTimeMillis());
//				try {
//					Thread.sleep(10000);
//				} catch (InterruptedException e) {
//					e.printStackTrace();
//				}
//				while(true){
//					try {
//						Thread.sleep(10000);
//						if(mqttClient!=null&& !mqttClient.isConnected()){
//							System.out.println("disConnected:"+System.currentTimeMillis());
//						}
//					} catch (InterruptedException e) {
//						e.printStackTrace();
//					}
//				}
//			}
//		}).start();
	}

	@Override
	public void onDestroy() {
		setOnline(false);
	     
		try {
			ShopUtil.logger2("MQTTService destory");
			mqttClient.disconnect(0);
		} catch (MqttException e) {
//			Toast.makeText(getApplicationContext(),
//					"Something went wrong!" + e.getMessage(), Toast.LENGTH_LONG)
//					.show();
			e.printStackTrace();
			
		}
		mqttClient = null;
		stopForeground(true);
		Intent intent = new Intent("com.dbjtech.waiqin.destroy");  
	    sendBroadcast(intent); 
	}

	

	public boolean isOnline() {
		return online;
	}

	public void setOnline(boolean online) {
		this.online = online;
	}
	@Override
	public int onStartCommand(Intent intent, int flags, int startId) {
		flags = START_STICKY;
		return super.onStartCommand(intent, flags, startId);
	}
}

源代码见githb:

https://github.com/whuanghkl/mqtt_client_swing.git

阿里云消息队列MQ 开发者手册见附件