消息中間件ActiveMQ的簡單使用-Topic模式

1.向消息中間件寫入消息

@Test
	public void testTopicSend() throws JMSException {
		ActiveMQConnectionFactory factory = new ActiveMQConnectionFactory();
		Connection connection = factory.createConnection();
		connection.start();
		Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
		Topic topic = session.createTopic("topic_test");
		MessageProducer producer = session.createProducer(topic);
		for(int i = 0;i < 10;i++) {
			MapMessage message = session.createMapMessage();
			message.setString("username", "djc");
			message.setString("password", "123456");
			producer.send(message);
		}
		session.close();
		connection.close();	
	}

2，手動方式實現消息的消費

@Test
	public void testTopicReceiver() throws JMSException {
		ActiveMQConnectionFactory factory = new ActiveMQConnectionFactory();
		Connection connection = factory.createConnection();
		connection.start();
		Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
		Topic topic = session.createTopic("topic_test");
		MessageConsumer consumer = session.createConsumer(topic);
		MapMessage message = (MapMessage) consumer.receive();
		System.out.println(message.getString("username"));
		session.close();
		connection.close();
	}

3.監聽器方式實現消息的消費

可同時開啓多個監聽器測試

	@Test	//監聽器1
	public void testTopicReceiverListener1() throws JMSException {
		ActiveMQConnectionFactory factory = new ActiveMQConnectionFactory();
		Connection connection = factory.createConnection();
		connection.start();
		Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
		Topic topic = session.createTopic("topic_test");
		MessageConsumer consumer = session.createConsumer(topic);
		consumer.setMessageListener(new MessageListener() {
			
			@Override
			public void onMessage(Message arg0) {
				
				try {
					MapMessage message = (MapMessage) arg0;
					System.out.println("Listener1===用戶名是："+message.getString("username"));
				} catch (JMSException e) {
					
					e.printStackTrace();
				}
			}
		});
		while(true);
	}
	
	@Test	//監聽器2
	public void testTopicReceiverListener2() throws JMSException {
		ActiveMQConnectionFactory factory = new ActiveMQConnectionFactory();
		Connection connection = factory.createConnection();
		connection.start();
		Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
		Topic topic = session.createTopic("topic_test");
		MessageConsumer consumer = session.createConsumer(topic);
		consumer.setMessageListener(new MessageListener() {
			
			@Override
			public void onMessage(Message arg0) {
				
				try {
					MapMessage message = (MapMessage) arg0;
					System.out.println("Listener2===用戶名是："+message.getString("username"));
				} catch (JMSException e) {
					
					e.printStackTrace();
				}
			}
		});
		while(true);
	}

注意：Topic模式消費者一方要先開啓，監聽器1，監聽器2模仿多客戶端訪問