RabbitMQ（三）------routing 路由选择/通配符模式

最新推荐文章于 2024-05-27 19:11:32 发布

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最新推荐文章于 2024-05-27 19:11:32 发布

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分类专栏： RabbitMQ

本文链接：https://blog.youkuaiyun.com/qq_42727102/article/details/103583977

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本文深入探讨了RabbitMQ的直接路由模式(direct)，解释了如何通过不同的路由键将消息发送到相应的队列，以及如何配置多个消费者来处理不同类型的事件。通过具体的Java代码示例，展示了如何设置交换机、绑定队列，并实现消息的发布和消费。

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1.Excahnge(交换机/转发器)：

一方面接收生产者的消息，另一方面是向队列推送消息

2.匿名转发： “”；

3.fanout（不处理路由键）
在这里插入图片描述
direct（处理路由键）

路由模式：
4.Send.java

public class Send {
    private static final String EXCHANGE_NAME = "test_exchange_direct";
    public static void main(String[] args) throws Exception{
        Connection connection = ConnectionUtils.getConnection();
        Channel channel = connection.createChannel();

        //声明交换机
        channel.exchangeDeclare(EXCHANGE_NAME,"direct");

        String msg = "hello direct";
        String routingKey = "warning";
        channel.basicPublish(EXCHANGE_NAME,routingKey,null,msg.getBytes());

        System.out.println("send:"+msg);

        channel.close();
        connection.close();
    }
}

Receive1.java

public class Receive1 {
    private static final String EXCHANGE_NAME = "test_exchange_direct";
    private static final String QUEUE_NAME = "test_queue_direct_1";
    private static int i = 1;
    public static void main(String[] args) throws Exception{
        Connection connection = ConnectionUtils.getConnection();
        final Channel channel = connection.createChannel();

        channel.queueDeclare(QUEUE_NAME,false,false,false,null);

        channel.basicQos(1);

        channel.queueBind(QUEUE_NAME,EXCHANGE_NAME,"error");

        //创建消费者
        DefaultConsumer defaultConsumer = new DefaultConsumer(channel) {
            //一旦有消息就会触发这个方法
            @Override
            public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
                String str = new String(body,"utf-8");
                System.out.println("[1] receive :"+str+"   "+(i++));
                try {
                    TimeUnit.SECONDS.sleep(2);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }finally {
                    System.out.println("[1] done ");
                    //手动回执
                    channel.basicAck(envelope.getDeliveryTag(),false);
                }
            }
        };

        //监听队列  不让其自动应答
        channel.basicConsume(QUEUE_NAME,false,defaultConsumer);
    }
}

Receive2.java

public class Receive2 {
    private static final String EXCHANGE_NAME = "test_exchange_direct";
    private static final String QUEUE_NAME = "test_queue_direct_2";
    private static int i = 1;
    public static void main(String[] args) throws Exception{
        Connection connection = ConnectionUtils.getConnection();
        final Channel channel = connection.createChannel();

        channel.queueDeclare(QUEUE_NAME,false,false,false,null);

        channel.basicQos(1);

        channel.queueBind(QUEUE_NAME,EXCHANGE_NAME,"error");
        channel.queueBind(QUEUE_NAME,EXCHANGE_NAME,"info");
        channel.queueBind(QUEUE_NAME,EXCHANGE_NAME,"warning");

        //创建消费者
        DefaultConsumer defaultConsumer = new DefaultConsumer(channel) {
            //一旦有消息就会触发这个方法
            @Override
            public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
                String str = new String(body,"utf-8");
                System.out.println("[2] receive :"+str+"   "+(i++));
                try {
                    TimeUnit.SECONDS.sleep(2);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }finally {
                    System.out.println("[2] done ");
                    //手动回执
                    channel.basicAck(envelope.getDeliveryTag(),false);
                }
            }
        };

        //监听队列  不让其自动应答
        channel.basicConsume(QUEUE_NAME,false,defaultConsumer);
    }
}