ActiveMQ学习笔记之十--从队列中接收消息

从队列中接收消息

public static void testReceive() throws Exception {

    ConnectionFactory factory = new ActiveMQConnectionFactory("tcp://localhost:61616");

    Connection connection = factory.createConnection();

    connection.start();

    final Session session = connection.createSession(true/*支持事务*/, Session.AUTO_ACKNOWLEDGE);

    Destination queue = session.createQueue("test_123");

    MessageConsumer consumer = session.createConsumer(queue);

    consumer.setMessageListener(new MessageListener() {

       @Override

       public void onMessage(Message message) {

           try {

              if (message instanceof TextMessage) {

                  String text = ((TextMessage) message).getText();

                  session.commit();//如果开启事务，这儿就需要提交，才会消费掉这条消息

                  System.out.println(text);

              }

           }

           catch (Exception e) {

              e.printStackTrace();

           }

       }

    });

}

可以观察到队列的变化：