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