消息中间件入门(ActiveMQ)

Queue模式

生产者

public class MyProducer {
    private static final String url = "tcp://127.0.0.1:61616";
    private static final String queueName = "queue-demo";

    public static void main(String[] args) throws JMSException {
        ConnectionFactory connectionFactory = new ActiveMQConnectionFactory(url);
        Connection connection = connectionFactory.createConnection();
        connection.start();
        //创建会话
        // 1.是否在事务中处理  2.连接的应答模式
        Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);//自动应答
        //创建目的地
        Destination destination = session.createQueue(queueName);
        //创建生产者
        MessageProducer producer = session.createProducer(destination);
        for (int i = 0; i < 10; i++) {
            TextMessage textMessage = session.createTextMessage("发送消息--" + i);
            producer.send(textMessage);
            System.out.println("发送消息--" + i);
        }
        //关闭连接
        connection.close();
    }
}

消费者

public class MyCustomer {
    private static final String url = "tcp://127.0.0.1:61616";
    private static final String queueName = "queue-demo";

    public static void main(String[] args) throws JMSException {
        ConnectionFactory connectionFactory = new ActiveMQConnectionFactory(url);
        Connection connection = connectionFactory.createConnection();
        connection.start();
        //创建会话
        // 1.是否在事务中处理  2.连接的应答模式
        Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);//自动应答
        //创建目的地
        Destination destination = session.createQueue(queueName);
        //创建消费者
        MessageConsumer consumer = session.createConsumer(destination);
        //创建监听器
        consumer.setMessageListener(new MessageListener() {
            public void onMessage(Message message) {
                TextMessage textMessage = (TextMessage) message;
                try {
                    System.out.println(("接收:" + textMessage.getText()));
                } catch (JMSException e) {
                    e.printStackTrace();
                }
            }
        });
    }
}

topic模式

topic模式只需要在前面代码上修改一行

Destination destination = session.createQueue(queueName);

改为

Destination destination = session.createTopic(topicName);

spring集成

common.xml

consumer.xml

producer.xml

ProducerService

public interface ProducerService {
    void sendMessage(String message);
}

public class ProducerServiceImpl implements ProducerService {

    @Autowired
    private JmsTemplate jmsTemplate;

    @Resource(name = "queueDestination")
    private Destination destination;

    @Override
    public void sendMessage(final String message) {
        jmsTemplate.send(destination, new MessageCreator() {
            @Override
            public Message createMessage(Session session) throws JMSException {
                TextMessage textMessage = session.createTextMessage(message);
                return textMessage;
            }
        });
        System.out.println(("发送消息:" + message));
    }
}

ProducerService发送消息测试

public class MyProducer {

    public static void main(String[] args) {
        ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("producer.xml");
        ProducerService service = context.getBean(ProducerService.class);
        for (int i = 0; i < 10; i++) {
            service.sendMessage("这是第" + i + "条消息");
        }
        context.close();
    }
}

ConsumerMessageListener .java

public class ConsumerMessageListener implements MessageListener{

    @Override
    public void onMessage(Message message) {
        TextMessage textMessage = (TextMessage) message;
        try {
            System.out.println(("接收消息" + textMessage.getText()));
        } catch (JMSException e) {
            e.printStackTrace();
        }
    }
}

接收消息测试

public class MyConsumer {

    public static void main(String[] args){
        ApplicationContext context = new ClassPathXmlApplicationContext("consumer.xml");
    }
}