使用JMS API创建JMS应用程序

1. 创建JMS应用程序的一般步骤；

    (1). 获取一个JMS ConnectionFactory

    (2). 使用ConnectionFactory创建一个Connection

    (3). 打开JMS Connection

    (4). 从Connection创建一个Session

    (5). 获取一个Destination

    (6). 创建一个JMS Producer或创建一个JMS producer 和 JMS Message并指定Destination

    (7). 创建一个JMD Consumer或创建一个JMD Consumer 并可选的注册一个JMS 消息Listener

    (8). 发送或接受JMS消息

    (9). 关闭所有的JMS资源(包括Connection, Session,Producer,Consumer等)

    实例代码：

public class MyMessageProducer {
         ...
         ConnectionFactory connectionFactory;
         Connection connection;
         Session session;
         Destination destination;
         MessageProducer producer;
         Message message;
         boolean useTransaction = false;

    
         try {
              Context ctx = new InitialContext();
              connectionFactory =
                   (ConnectionFactory) ctx.lookup("ConnectionFactoryName");
              connection = connectionFactory.createConnection();
              connection.start();
              session = connection.createSession(useTransaction,Session.AUTO_ACKNOWLEDGE);
              destination = session.createQueue("TEST.QUEUE");
              producer = session.createProducer(destination);
              message = session.createTextMessage("this is a test");
              producer.send(message);
         } catch (JMSException jmsEx) {

              ...
         } finally {
              producer.close();
              session.close();
              connection.close();
         }
 } 

2. 同步方式接收一个JMS Message

public class MySyncMessageConsumer {
        ...
        ConnectionFactory connectionFactory;
        Connection connection;
        Session session;
        Destination destination;
        MessageConsumer consumer;
        Message message;
        boolean useTransaction = false;
        try {
             Context ctx = new InitialContext();
             connectionFactory = (ConnectionFactory) ctx.lookup("ConnectionFactoryName");
             connection = connectionFactory.createConnection();
             connection.start();
             session = connection.createSession(useTransaction,
             Session.AUTO_ACKNOWLEDGE);
             destination = session.createQueue("TEST.QUEUE");
             consumer = session.createConsumer(destination);
             message = (TextMessage) consumer.receive(1000);
             System.out.println("Received message: " + message);

        } catch (JMSException jmsEx) {
             ...
        } finally {
             producer.close();
             session.close();
             connection.close();
        }
 }

3. 异步方式接收一个JMS Message

public class MyAsyncMessageConsumer implements MessageListener {
        ...
        ConnectionFactory connectionFactory;
        Connection connection;
        Session session;
        Destination destination;
        MessageProducer producer;
        Message message;
        boolean useTransaction = false;
        try {
              Context ctx = new InitialContext();
              connectionFactory = (ConnectionFactory) ctx.lookup("ConnectionFactoryName");
              connection = connectionFactory.createConnection();
              connection.start();
              session = connection.createSession(useTransaction,
                  Session.AUTO_ACKNOWLEDGE);
              destination = session.createQueue("TEST.QUEUE");
              consumer = session.createConsumer(destination);
              consumer.setMessageListener(this);
        } catch (JMSException jmsEx) {
              ...
        } finally {
              producer.close();

              session.close();
              connection.close();
        }

       
        public void onMessage(Message message) {
              if (message instanceof TextMessage) {
                  System.out.println("Received message: " + message);
              }
        }
}