activemq消息队列-发布/订阅

 

  发布-订阅消息：一个消息多次消费（群发）

 

  阻塞的方式接收消息

 

 

 public class TopicProducter {
   
    // 发送次数
   public static final int SEND_NUM = 10;
   // tcp 地址 服务器器端地址
   //public static final String BROKER_URL =ActiveMQConnection.DEFAULT_BROKER_URL;  // 其值为 "tcp://localhost:61616";
   public static final String BROKER_URL = "tcp://192.168.191.12:61616";
   // 目标地址，在ActiveMQ管理员控制台创建 http://localhost:8161/admin/topics.jsp中可以查询到发送的mq消息
   public static final String DESTINATION = "jd.mq.topic";
   //测试连接使用默认的用户名
   public static final String DEFAULT_USER = ActiveMQConnection.DEFAULT_USER;//默认为null
   //测试连接使用默认的密码
   public static final String DEFAULT_PASSWORD = ActiveMQConnection.DEFAULT_PASSWORD;//默认为null
 
   /**
    * 消息发送端
    * @param session
    * @param publisher
    * @throws Exception
    */
   public static void sendMessage(TopicSession session, TopicPublisher publisher) throws Exception {
       for (int i = 0; i < SEND_NUM; i++) {
           String message = "发送消息第" + (i + 1) + "条";
           
           TextMessage textMessage = session.createTextMessage(message);
           System.out.println(textMessage.getText());
           //发送 Topic消息
           publisher.send(textMessage);
       }
   }
   
   public  void run() throws Exception {
       //Topic连接
       TopicConnection connection = null;
       //Topic会话
       TopicSession session = null;
       try {
           // 1、创建链接工厂
           TopicConnectionFactory factory = new ActiveMQConnectionFactory(TopicProducter.DEFAULT_USER, TopicProducter.DEFAULT_PASSWORD, TopicProducter.BROKER_URL);
           // 2、通过工厂创建一个连接
           connection = factory.createTopicConnection();
           // 3、启动连接
           connection.start();
           // 4、创建一个session会话
           session = connection.createTopicSession(Boolean.TRUE, Session.AUTO_ACKNOWLEDGE);
           // 5、创建一个消息队列
           Topic topic = session.createTopic(DESTINATION);
           // 6、创建消息发送者
           TopicPublisher publisher = session.createPublisher(topic);
           // 设置持久化模式
           publisher.setDeliveryMode(DeliveryMode.NON_PERSISTENT);
           sendMessage(session, publisher);
           // 提交会话
           session.commit();
           
           
       } catch (Exception e) {
           throw e;
       } finally {
           // 关闭释放资源
           if (session != null) {
               session.close();
           }
           if (connection != null) {
               connection.close();
           }
       }
   }
   
   public static void main(String[] args) throws Exception {
     new  TopicProducter().run();
   }
}

 

public class TopicReceiver {
  
 
    // tcp 地址 服务器器端地址
   // public static final String BROKER_URL =ActiveMQConnection.DEFAULT_BROKER_URL;  // 其值为 "tcp://localhost:61616";
 public static final String BROKER_URL = "tcp://192.168.191.12:61616";
 // 目标地址，在ActiveMQ管理员控制台创建 http://localhost:8161/admin/topics.jsp中可以查询到发送的mq消息
    public static final String DESTINATION = "jd.mq.topic";
    //测试连接使用默认的用户名
    public static final String DEFAULT_USER = ActiveMQConnection.DEFAULT_USER;//默认为null
    //测试连接使用默认的密码
    public static final String DEFAULT_PASSWORD = ActiveMQConnection.DEFAULT_PASSWORD;//默认为null
 
    
    public static void run() throws Exception {
        
        TopicConnection connection = null;
        TopicSession session = null;
        try {
            // 1、创建链接工厂
            TopicConnectionFactory factory = new ActiveMQConnectionFactory(TopicReceiver.DEFAULT_USER, TopicReceiver.DEFAULT_PASSWORD, TopicReceiver.BROKER_URL);
            // 2、通过工厂创建一个连接
            connection = factory.createTopicConnection();
            // 3、启动连接
            connection.start();
            // 4、创建一个session会话
            session = connection.createTopicSession(Boolean.TRUE, Session.AUTO_ACKNOWLEDGE);
            // 5、创建一个消息队列
            Topic topic = session.createTopic(DESTINATION);
            // 6、创建消息制作者
            final TopicSubscriber subscriber = session.createSubscriber(topic);
            
            //接收Topic生产者发送过来的消息
            //需要注意的是此处需要启动一个新的线程来处理问题
            new Thread(){
                public void run(){
                TextMessage textMessage = null;
                try {
                    while(true){//持续接收消息
                    textMessage = (TextMessage) subscriber.receive();
                    if(textMessage==null)
                     break;
                    System.out.println("接收#" + textMessage.getText());
                    }
                } catch (JMSException e) {
                    e.printStackTrace();
                }
                }
            }.start();
            
            // 休眠100s再关闭 接收生产者发送的全部的10条消息
            // 需要注意的是这里使用sleep会使当前正在执行的线程进入休眠状态
            // 也就是TopicReceiver_Receive这个类进入休眠状态了，而接收者.start方法刚刚启动的新线程会继续执行的哦。
            Thread.sleep(1000 *100);
            
            // 提交会话
            session.commit();
            
        } catch (Exception e) {
            throw e;
        } finally {
            // 关闭释放资源
            if (session != null) {
                session.close();
            }
            if (connection != null) {
                connection.close();
            }
        }
    }
    
    public static void main(String[] args) throws Exception {
        TopicReceiver.run();
    }
}