RabbitMQ从入门到精通（通配符模式topic模糊匹配）

1、通配符模式

同一个消息被多个消费者获取。一个消费者队列可以有多个消费者实例，只有其中一个消费者实例会消费到消息。

2、生产者

public class Send {
    private final static String EXCHANGE_NAME = "test_exchange_topic";

    public static void main(String[] args) throws Exception {
        Connection connection = ConnectionUtil.getConnection();
        Channel channel = connection.createChannel();
        channel.exchangeDeclare(EXCHANGE_NAME, "topic");
        String message = "Hello World!";
        channel.basicPublish(EXCHANGE_NAME, "delete.user.pp", null, message.getBytes());
        System.out.println(" [x] Sent '" + message + "'");
        channel.close();
        connection.close();
    }

}

2、消费者一

public class Recv {
    private final static String QUEUE_NAME = "test_queue_topic_1";
    private final static String EXCHANGE_NAME = "test_exchange_topic";

    public static void main(String[] args) throws Exception {
        Connection connection = ConnectionUtil.getConnection();
        Channel channel = connection.createChannel();
        channel.queueDeclare(QUEUE_NAME, false, false, false, null);
        channel.queueBind(QUEUE_NAME, EXCHANGE_NAME, "update.*");
        channel.queueBind(QUEUE_NAME, EXCHANGE_NAME, "delete.#");
        channel.basicQos(1);
        Consumer consumer = new DefaultConsumer(channel) {
            @Override
            public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
                String message = new String(body, "UTF-8");
                System.out.println("我是消费者一，我消费了：" + message);
                try { TimeUnit.SECONDS.sleep(1); } catch (Exception e) { e.printStackTrace(); }
                channel.basicAck(envelope.getDeliveryTag(),false);
            }
        };
        channel.basicConsume(QUEUE_NAME, false, consumer);
    }

}

3、消费者二

public class Recv2 {
    private final static String QUEUE_NAME = "test_queue_topic_2";
    private final static String EXCHANGE_NAME = "test_exchange_topic";

    public static void main(String[] args) throws Exception {
        Connection connection = ConnectionUtil.getConnection();
        Channel channel = connection.createChannel();
        channel.queueDeclare(QUEUE_NAME, false, false, false, null);
        channel.queueBind(QUEUE_NAME, EXCHANGE_NAME, "insert.*");
        channel.basicQos(1);
        Consumer consumer = new DefaultConsumer(channel) {
            @Override
            public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
                String message = new String(body, "UTF-8");
                System.out.println("我是消费者二，我消费了：" + message);
                try { TimeUnit.SECONDS.sleep(1); } catch (Exception e) { e.printStackTrace(); }
                channel.basicAck(envelope.getDeliveryTag(),false);
            }
        };
        channel.basicConsume(QUEUE_NAME, false, consumer);
    }

}

4、测试结果

消费者一：能够匹配update.后面加一个单词和delete后面加多个单词（以.隔开的路由键）。
消费者二: 能够匹配insert.后面加一个单词的路由键。