ActiveMQ接收消息+发送消息的简单实例(二)
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：
java 代码
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();
}
}
ActiveMQ的一个简单实例-ActiveMQ接收+发送消息