1：
queue与topic两种魔术。queue是“该队列所有的监听者总共消费1次”；topic是“该所有的订阅者都会消费1次”
//连接配置
private String userName = "admin"; private String password = "admin"; private String url = "tcp://192.168.8.65:61616"; private String queueName = "Qtest_queue"; private String topicName = "Ttest_topic";
1.1 queue队列消息
1.1.1 生产者
/** * 队列模式：生产者 */ @Test public void queueProduce() throws JMSException { // #1 创建连接工厂 ActiveMQConnectionFactory factory = new ActiveMQConnectionFactory(userName, password, url); // #2 从工厂获得连接connectino Connection connection = factory.createConnection(); // #3 启动访问 connection.start(); // #4 创建会话session Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE); // #5 由会话session创建目的地distinct(Queue/Topic) Queue queue = session.createQueue(queueName); // #6 会话session创建生产者Produce MessageProducer producer = session.createProducer(queue); // #7 宕机保存消息 producer.setDeliveryMode(DeliveryMode.PERSISTENT); // #8 生产消息，发送到队列 for (int i = 1; i <= 10; i++) { String msg = "第" + i + "个msg"; TextMessage message = session.createTextMessage(msg); // #9 发送消息到MQ producer.send(message); } // #10 关闭资源 producer.close(); session.close(); connection.close(); }
1.1.2消费者
1.1.2.1 receive模式
/** * 队列模式：消费者 * Receive方式：每次只消费一次(需要代码while循环查询) */ @Test public void queueReceiveConsumer() throws JMSException { // #1 创建连接工厂 ActiveMQConnectionFactory factory = new ActiveMQConnectionFactory(userName, password, url); // #2 从工厂获得连接connectino Connection connection = factory.createConnection(); // #3 启动访问 connection.start(); // #4 创建会话session Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE); // #5 由会话session创建目的地distinct(Queue/Topic) Queue queue = session.createQueue(queueName); // #6 会话session创建消费者Produce MessageConsumer consumer = session.createConsumer(queue); // receive同步阻塞方式：没有收到消息一直等 while (true) { Message message = consumer.receive(); //没有参数会一直等 if (message != null && message instanceof TextMessage) { TextMessage textMessage = (TextMessage) message; System.out.println("消费了：： " + textMessage); } else { break; } } // #10 关闭资源 consumer.close(); session.close(); connection.close(); }
1.1.2.2listen监听模式
/** * 队列模式：消费者 * Listen方式 */ @Test public void queueListenConsumer() throws JMSException { // #1 创建连接工厂 ActiveMQConnectionFactory factory = new ActiveMQConnectionFactory(userName, password, url); // #2 从工厂获得连接connectino Connection connection = factory.createConnection(); // #3 启动访问 connection.start(); // #4 创建会话session Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE); // #5 由会话session创建目的地distinct(Queue/Topic) Queue queue = session.createQueue(queueName); // #6 会话session创建消费者Produce MessageConsumer consumer = session.createConsumer(queue); // 监听方式获得message consumer.setMessageListener(message -> { if (message != null && message instanceof TextMessage) { TextMessage textMessage = (TextMessage) message; System.out.println("消费了：： " + textMessage); } }); try { System.in.read();//保证控制台不灭：避免没有监听到消息的时候关闭控制台 } catch (IOException e) { e.printStackTrace(); } // #10 关闭资源 consumer.close(); session.close(); connection.close(); }
1.2 topic模式
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1.2.1 生产者
@Test public void topicProducer() throws JMSException { // #1 创建连接工厂 ActiveMQConnectionFactory factory = new ActiveMQConnectionFactory(userName, password, url); // #2 从工厂获得连接connectino Connection connection = factory.createConnection(); // #3 启动访问 connection.start(); // #4 创建会话session Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE); // #5 由会话session创建目的地distinct(Queue/Topic) Topic topic = session.createTopic(topicName); // #6 会话session创建生产者Produce MessageProducer producer = session.createProducer(topic); // #7 宕机保存消息 producer.setDeliveryMode(DeliveryMode.PERSISTENT); // #8 生产消息，发送到队列 for (int i = 1; i <= 10; i++) { String msg = "第" + i + "个msg"; TextMessage message = session.createTextMessage(msg); message.setStringProperty("top","vip"); //设置消息属性，加强消息的识别度（comsumer可以进行筛选某些消息，着重处理） // #9 发送消息到MQ producer.send(message); } // #10 关闭资源 producer.close(); session.close(); connection.close(); }
1.2.2消费者
1.2.2.1 receive模式
// 多个消费者测试topic模式
@Test public void topicReceiveConsumer1() throws JMSException { // #1 创建连接工厂 ActiveMQConnectionFactory factory = new ActiveMQConnectionFactory(userName, password, url); // #2 从工厂获得连接connectino Connection connection = factory.createConnection(); // #3 启动访问 connection.start(); // #4 创建会话session Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE); // #5 由会话session创建目的地distinct(Queue/Topic) Topic topic = session.createTopic(topicName); // #6 会话session创建生产者Produce MessageConsumer consumer = session.createConsumer(topic); while (true) { Message receive = consumer.receive(); if (receive != null && receive instanceof TextMessage) { TextMessage message = (TextMessage) receive; System.out.println("topicConsumer1收到topic消息" + message.getText()); } } // #10 关闭资源 // consumer.close(); // session.close(); // connection.close(); }
1.2.2.2 listen监听模式
@Test public void topicListenConsumer2() throws JMSException, IOException { // #1 创建连接工厂 ActiveMQConnectionFactory factory = new ActiveMQConnectionFactory(userName, password, url); // #2 从工厂获得连接connectino Connection connection = factory.createConnection(); // #3 启动访问 connection.start(); // #4 创建会话session Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE); // #5 由会话session创建目的地distinct(Queue/Topic) Topic topic = session.createTopic(topicName); // #6 会话session创建生产者Produce MessageConsumer consumer = session.createConsumer(topic); consumer.setMessageListener(message -> { if (message != null && message instanceof TextMessage) { TextMessage msg = (TextMessage) message; try { System.out.println("topicListenConsumer2收到topic消息" + msg.getText()); } catch (JMSException e) { e.printStackTrace(); } } }); System.in.read(); // #10 关闭资源 // consumer.close(); // session.close(); // connection.close(); }