RabbitMQ五种消息队列学习（五）--路由模式

野性酷女 2022-06-03 03:59 208阅读 0赞

# RabbitMQ五种消息队列学习（五）–路由模式 #

标签（空格分隔）： RabbitMQ

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发布订阅模式只是利用路由这个功能，将消息全部分发给所有与路由绑定的队列中，不能对不同的消息进行选择性的分发。

## 模型结构 ##

![这里写图片描述][SouthEast]

路由根据Routing Key进行动态的绑定分发  
消息路径如下：  
![这里写图片描述][SouthEast 1]

## 实现 ##

1、生产者

> 发送一个key：channel.basicPublish(EXCHANGE\_NAME, “delete”, null, message.getBytes());

private final static String EXCHANGE_NAME = "test_exchange_direct";
    
        public static void main(String[] argv) throws Exception {
            // 获取到连接以及mq通道
            Connection connection = ConnectionUtil.getConnection();
            Channel channel = connection.createChannel();
    
            // 声明exchange
            channel.exchangeDeclare(EXCHANGE_NAME, "direct");
    
            // 消息内容
            String message = "id = 1000";
            channel.basicPublish(EXCHANGE_NAME, "delete", null, message.getBytes());
            System.out.println(" [x] Sent '" + message + "'");
    
            channel.close();
            connection.close();
        }

2、消费者1  
绑定路由key

> // 绑定队列到交换机  
> channel.queueBind(QUEUE\_NAME, EXCHANGE\_NAME, “update”);  
> channel.queueBind(QUEUE\_NAME, EXCHANGE\_NAME, “delete”);

private final static String QUEUE_NAME = "test_queue_direct_1";
    
        private final static String EXCHANGE_NAME = "test_exchange_direct";
    
        public static void main(String[] argv) throws Exception {
    
            // 获取到连接以及mq通道
            Connection connection = ConnectionUtil.getConnection();
            Channel channel = connection.createChannel();
    
            // 声明队列
            channel.queueDeclare(QUEUE_NAME, false, false, false, null);
    
            // 绑定队列到交换机
            channel.queueBind(QUEUE_NAME, EXCHANGE_NAME, "update");
            channel.queueBind(QUEUE_NAME, EXCHANGE_NAME, "delete");
    
            // 同一时刻服务器只会发一条消息给消费者
            channel.basicQos(1);
    
            // 定义队列的消费者
            QueueingConsumer consumer = new QueueingConsumer(channel);
            // 监听队列，手动返回完成
            channel.basicConsume(QUEUE_NAME, false, consumer);
    
            // 获取消息
            while (true) {
                QueueingConsumer.Delivery delivery = consumer.nextDelivery();
                String message = new String(delivery.getBody());
                System.out.println(" [x] Received '" + message + "'");
                Thread.sleep(10);
    
                channel.basicAck(delivery.getEnvelope().getDeliveryTag(), false);
            }
        }

3、消费者2

private final static String QUEUE_NAME = "test_queue_direct_2";
    
        private final static String EXCHANGE_NAME = "test_exchange_direct";
    
        public static void main(String[] argv) throws Exception {
    
            // 获取到连接以及mq通道
            Connection connection = ConnectionUtil.getConnection();
            Channel channel = connection.createChannel();
    
            // 声明队列
            channel.queueDeclare(QUEUE_NAME, false, false, false, null);
    
            // 绑定队列到交换机
            channel.queueBind(QUEUE_NAME, EXCHANGE_NAME, "insert");
            channel.queueBind(QUEUE_NAME, EXCHANGE_NAME, "update");
            channel.queueBind(QUEUE_NAME, EXCHANGE_NAME, "delete");
    
            // 同一时刻服务器只会发一条消息给消费者
            channel.basicQos(1);
    
            // 定义队列的消费者
            QueueingConsumer consumer = new QueueingConsumer(channel);
            // 监听队列，手动返回完成
            channel.basicConsume(QUEUE_NAME, false, consumer);
    
            // 获取消息
            while (true) {
                QueueingConsumer.Delivery delivery = consumer.nextDelivery();
                String message = new String(delivery.getBody());
                System.out.println(" [x] Received '" + message + "'");
                Thread.sleep(10);
    
                channel.basicAck(delivery.getEnvelope().getDeliveryTag(), false);
            }
        }

## 测试 ##

## 总结： ##

该模式可以实现对绑定在同一个路由器的地方实现不同的分发模式。那有没有更灵活的处理方式呢？—通配符

[SouthEast]: /images/20220603/f5d2fdf0d17c4a3483f9f917a5ad9ac7.png
[SouthEast 1]: /images/20220603/8ac9c0ed99ac420784745508908d8538.png