routing路由模式

一：介绍

1.模式

　　

2.应用场景

　　如果exchangge与队列中的key相同，消息就发送过去。

　　这个就是需要将交换机与队列增加key。

3.路由类型

　　上节课的订阅模式中的路由类型是Fanout。

　　这篇文章的路由类型是Direct。

二：程序

1.生产者

 package com.mq.routing;
 
 import com.mq.utils.ConnectionUtil;
 import com.rabbitmq.client.Channel;
 import com.rabbitmq.client.Connection;
 import com.rabbitmq.client.ConnectionFactory;
 
 public class RoutingSend {
     private static final String EXCHANGE_NAME="test_exchange_direct";
     private static final String QUEUE_NAME="test_queue_direct_1";
     public static void main(String[] args)throws Exception{
         Connection connection= ConnectionUtil.getConnection();
         Channel channel=connection.createChannel();
         channel.exchangeDeclare(EXCHANGE_NAME,"direct");
         String msg="hello routing";
         //重点是第二个参数routingKey
         String routingKey="info";
         channel.basicPublish(EXCHANGE_NAME,routingKey,null,msg.getBytes());
         System.out.println("msg send:"+msg);
         channel.close();
         connection.close();
     }
 }

2.消费者一

 package com.mq.routing;
 
 import com.mq.utils.ConnectionUtil;
 import com.rabbitmq.client.*;
 
 import java.io.IOException;
 
 public class RoutingReceive1 {
     private static final String EXCHANGE_NAME="test_exchange_direct";
     private static final String QUEUE_NAME="test_queue_direct_1";
     public static void main(String[] args)throws Exception{
         Connection connection= ConnectionUtil.getConnection();
         final Channel channel=connection.createChannel();
         channel.queueDeclare(QUEUE_NAME,false,false,false,null);
         channel.queueBind(QUEUE_NAME,EXCHANGE_NAME,"error");
         channel.basicQos(1);
         Consumer consumer=new DefaultConsumer(channel){
             @Override
             public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
                 String msg = new String(body, "utf-8");
                 System.out.println("[1] receive:" + msg);
                 try {
                     Thread.sleep(200);
                 }catch (Exception e){
                     e.printStackTrace();
                 }finally {
                     System.out.println("[done]");
                     channel.basicAck(envelope.getDeliveryTag(),false);
                 }
             }
         };
         boolean autoAck=false;
         channel.basicConsume(QUEUE_NAME,autoAck,consumer);
     }
 }

3.消费者二

 package com.mq.routing;
 
 import com.mq.utils.ConnectionUtil;
 import com.rabbitmq.client.*;
 
 import java.io.IOException;
 
 public class RoutingReceive2 {
     private static final String EXCHANGE_NAME="test_exchange_direct";
     private static final String QUEUE_NAME="test_queue_direct_2";
     public static void main(String[] args)throws Exception{
         Connection connection= ConnectionUtil.getConnection();
         final Channel channel=connection.createChannel();
         channel.queueDeclare(QUEUE_NAME,false,false,false,null);
         channel.queueBind(QUEUE_NAME,EXCHANGE_NAME,"error");
         channel.queueBind(QUEUE_NAME,EXCHANGE_NAME,"info");
         channel.queueBind(QUEUE_NAME,EXCHANGE_NAME,"waring");
         channel.basicQos(1);
         Consumer consumer=new DefaultConsumer(channel){
             @Override
             public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
                 String msg = new String(body, "utf-8");
                 System.out.println("[1] receive:" + msg);
                 try {
                     Thread.sleep(200);
                 }catch (Exception e){
                     e.printStackTrace();
                 }finally {
                     System.out.println("[done]");
                     channel.basicAck(envelope.getDeliveryTag(),false);
                 }
             }
         };
         boolean autoAck=false;
         channel.basicConsume(QUEUE_NAME,autoAck,consumer);
     }
 }

4.现象

　　send：

　　

　　receive1：

　　

　　receive2：