ActiveMQ的一个producer----customer例子

关键字: producertool/customertool                   ActiveMQ的一个简单示例
关键字: activemq

最近由于公司项目需要，开始学习JMS，用的是ActiveMQ。由于这方面网上的例子不是很多，而且有的也不完整。于是经过几天的摸索学习，写了一个简单的小例子，现在贴出来与大家分享。
ProducerTool.java用于发送消息：

package homework;    
   
import javax.jms.Connection;    
import javax.jms.DeliveryMode;    
import javax.jms.Destination;    
import javax.jms.JMSException;    
import javax.jms.MessageProducer;    
import javax.jms.Session;    
import javax.jms.TextMessage;    
   
import org.apache.activemq.ActiveMQConnection;    
import org.apache.activemq.ActiveMQConnectionFactory;    
   
public class ProducerTool {    
   
    private String user = ActiveMQConnection.DEFAULT_USER;    
   
    private String password = ActiveMQConnection.DEFAULT_PASSWORD;    
   
    private String url = ActiveMQConnection.DEFAULT_BROKER_URL;    
   
    private String subject = "TOOL.DEFAULT";    
   
    private Destination destination = null;    
   
    private Connection connection = null;    
   
    private Session session = null;    
   
    private MessageProducer producer = null;    
   
    // 初始化    
    private void initialize() throws JMSException, Exception {    
        ActiveMQConnectionFactory connectionFactory = new ActiveMQConnectionFactory(    
                user, password, url);    
        connection = connectionFactory.createConnection();    
        session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);    
        destination = session.createQueue(subject);    
        producer = session.createProducer(destination);    
        producer.setDeliveryMode(DeliveryMode.NON_PERSISTENT);    
    }    
   
    // 发送消息    
    public void produceMessage(String message) throws JMSException, Exception {    
        initialize();    
        TextMessage msg = session.createTextMessage(message);    
        connection.start();    
        System.out.println("Producer:->Sending message: " + message);    
        producer.send(msg);    
        System.out.println("Producer:->Message sent complete!");    
    }    
   
    // 关闭连接    
    public void close() throws JMSException {    
        System.out.println("Producer:->Closing connection");    
        if (producer != null)    
            producer.close();    
        if (session != null)    
            session.close();    
        if (connection != null)    
            connection.close();    
    }    
}   

ConsumerTool.java用于接受消息，我用的是基于消息监听的机制，需要实现MessageListener接口，这个接口有个onMessage方法，当接受到消息的时候会自动调用这个函数对消息进行处理。

package homework;    
   
import javax.jms.Connection;    
import javax.jms.Destination;    
import javax.jms.JMSException;    
import javax.jms.MessageConsumer;    
import javax.jms.Session;    
import javax.jms.MessageListener;    
import javax.jms.Message;    
import javax.jms.TextMessage;    
   
import org.apache.activemq.ActiveMQConnection;    
import org.apache.activemq.ActiveMQConnectionFactory;    
   
public class ConsumerTool implements MessageListener {    
   
    private String user = ActiveMQConnection.DEFAULT_USER;    
   
    private String password = ActiveMQConnection.DEFAULT_PASSWORD;    
   
    private String url = ActiveMQConnection.DEFAULT_BROKER_URL;    
   
    private String subject = "TOOL.DEFAULT";    
   
    private Destination destination = null;    
   
    private Connection connection = null;    
   
    private Session session = null;    
   
    private MessageConsumer consumer = null;    
   
    // 初始化    
    private void initialize() throws JMSException, Exception {    
        ActiveMQConnectionFactory connectionFactory = new ActiveMQConnectionFactory(    
                user, password, url);    
        connection = connectionFactory.createConnection();    
        session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);    
        destination = session.createQueue(subject);    
        consumer = session.createConsumer(destination);    
            
    }    
   
    // 消费消息    
    public void consumeMessage() throws JMSException, Exception {    
        initialize();    
        connection.start();    
            
        System.out.println("Consumer:->Begin listening...");    
        // 开始监听    
        consumer.setMessageListener(this);    
        // Message message = consumer.receive();    
    }    
   
    // 关闭连接    
    public void close() throws JMSException {    
        System.out.println("Consumer:->Closing connection");    
        if (consumer != null)    
            consumer.close();    
        if (session != null)    
            session.close();    
        if (connection != null)    
            connection.close();    
    }    
   
    // 消息处理函数    
    public void onMessage(Message message) {    
        try {    
            if (message instanceof TextMessage) {    
                TextMessage txtMsg = (TextMessage) message;    
                String msg = txtMsg.getText();    
                System.out.println("Consumer:->Received: " + msg);    
            } else {    
                System.out.println("Consumer:->Received: " + message);    
            }    
        } catch (JMSException e) {    
            // TODO Auto-generated catch block    
            e.printStackTrace();    
        }    
    }    
}    

如果想主动的去接受消息，而不用消息监听的话，把consumer.setMessageListener(this)改为Message message = consumer.receive()，手动去调用MessageConsumer的receive方法即可。

下面是测试类Test.java：

package homework;    
   
import javax.jms.JMSException;    
   
public class Test {    
   
    /**   
     * @param args   
     */   
    public static void main(String[] args) throws JMSException, Exception {    
        // TODO Auto-generated method stub    
        ConsumerTool consumer = new ConsumerTool();    
        ProducerTool producer = new ProducerTool();    
        // 开始监听    
        consumer.consumeMessage();    
            
        // 延时500毫秒之后发送消息    
        Thread.sleep(500);    
        producer.produceMessage("Hello, world!");    
        producer.close();    
            
        // 延时500毫秒之后停止接受消息    
        Thread.sleep(500);    
        consumer.close();    
    }    
}    

以上就是我学习ActiveMQ之后写的一个简单的例子，希望对你有帮助，如果有什么错误还请指正。

评论

1 楼 wjm901215 2011-05-13  

导入的那些jar包能具体说下吗