ActiveMq实例

1.发布端

import javax.jms.Connection;  
import javax.jms.ConnectionFactory;  
import javax.jms.DeliveryMode;  
import javax.jms.Destination;  
import javax.jms.JMSException;  
import javax.jms.Message;  
import javax.jms.MessageProducer;  
import javax.jms.Session;  
  
import org.apache.activemq.ActiveMQConnection;  
import org.apache.activemq.ActiveMQConnectionFactory;  
import org.slf4j.Logger;  
import org.slf4j.LoggerFactory;  
  
public class Publisher   
{  
    private static Logger logger = LoggerFactory.getLogger(Publisher.class);  
      
    public static void main(String[] args)   
    {  
        ConnectionFactory connectionFactory;  
        Connection connection = null;  
        Session session;  
        MessageProducer producer;  
        connectionFactory = new ActiveMQConnectionFactory(  
                ActiveMQConnection.DEFAULT_USER,  
                ActiveMQConnection.DEFAULT_PASSWORD,  
                "tcp://localhost:61616");  
        try   
        {  
            connection = connectionFactory.createConnection();  
            connection.start();  
              
            session = connection.createSession(Boolean.TRUE,  
                    Session.AUTO_ACKNOWLEDGE);  
  
            //注意这里与ptp例子的区别，使用null作为destination  
            producer = session.createProducer(null);  
              
            producer.setDeliveryMode(DeliveryMode.NON_PERSISTENT);  
              
            sendMessage(session, producer);  
              
            session.commit();  
        }   
        catch (Exception e)  
        {  
            e.printStackTrace();  
        }  
        finally   
        {  
            try   
            {  
                if (null != connection)  
                    connection.close();  
            }  
            catch (Throwable ignore)   
            {  
            }  
        }  
      
    }  
  
    private static void sendMessage(Session session, MessageProducer producer) throws JMSException   
    {  
        Destination destination = session.createTopic("pub/sub");  
        Message message = session.createMapMessage();  
        message.setStringProperty("company", "alibaba");  
        message.setStringProperty("department", "b2b");  
        logger.info("destination is {};message is ready to send", destination);  
          
        producer.send(destination, message);  
    }  
}  

2.接收端

import javax.jms.Connection;  
import javax.jms.ConnectionFactory;  
import javax.jms.Destination;  
import javax.jms.MessageConsumer;  
import javax.jms.Session;  
  
import org.apache.activemq.ActiveMQConnection;  
import org.apache.activemq.ActiveMQConnectionFactory;  
  
  
public class Subscribe   
{  
    public static void main(String[] args)   
    {  
        ConnectionFactory connectionFactory;  
        Connection connection = null;  
        Session session;  
        Destination destination;  
        MessageConsumer consumer;  
          
        connectionFactory = new ActiveMQConnectionFactory(  
                ActiveMQConnection.DEFAULT_USER,  
                ActiveMQConnection.DEFAULT_PASSWORD,  
                "tcp://localhost:61616");  
        try   
        {  
            connection = connectionFactory.createConnection();  
            connection.start();  
            session = connection.createSession(Boolean.FALSE,  
                    Session.AUTO_ACKNOWLEDGE);  
              
            destination = session.createTopic("pub/sub");  
            consumer = session.createConsumer(destination);  
              
            //设置指定的监听器  
            consumer.setMessageListener(new MyListener());  
              
            Thread.sleep(100*1000);  
        }   
        catch (Exception e)   
        {  
            e.printStackTrace();  
        }  
        finally   
        {  
            try   
            {  
                if (null != connection)  
                    connection.close();  
            }  
            catch (Throwable ignore)   
            {  
            }  
        }  
      
    }  
}  

3.监听器

import javax.jms.JMSException;  
import javax.jms.MapMessage;  
import javax.jms.Message;  
import javax.jms.MessageListener;  
  
import org.slf4j.Logger;  
import org.slf4j.LoggerFactory;  
  
public class MyListener implements MessageListener   
{  
    private static Logger logger = LoggerFactory.getLogger(MyListener.class);  
      
    public void onMessage(Message message)   
    {  
        MapMessage mapMessage = (MapMessage) message;  
        try   
        {  
            String company = mapMessage.getStringProperty("company");  
            String department = mapMessage.getStringProperty("department");  
              
            logger.info("company is {} ; department is {}", company,department);   
        } catch (JMSException e)   
        {  
            e.printStackTrace();  
        }  
    }  
}  

4.测试

先启动接收端，再启动发布端，结果为：

[main] INFO com.mycompany.app.pub.sub.Publisher - destination is topic://pub/sub;message is ready to send 

[ActiveMQ Session Task-1] INFO com.mycompany.app.pub.sub.MyListener - company is alibaba ; department is b2b