RabbitMQ五种消息队列学习（五）–路由模式

标签（空格分隔）： RabbitMQ

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

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

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);
        }
    }