RabbitMQ消息队列（八）-通过Topic主题模式分发消息（.Net Core版）

前两章我们讲了RabbitMQ的direct模式和fanout模式，本章介绍topic主题模式的应用。如果对direct模式下通过routingkey来匹配消息的模式已经有一定了解那fanout也很好理解。简单的可以理解成direct是通过routingkey精准匹配的，而topic是通过routingkey来模糊匹配。 
在topic模式下支持两个特殊字符的匹配。

* (星号) 代表任意 一个单词
# (井号) 0个或者多个单词

注意：上面说的是单词不是字符。

如下图所示，RabbitMQ direct模式通过RoutingKey来精准匹配，RoutingKey为red的投递到Queue1，RoutingKey为black和white的投递到Queue2。

我们可以假设一个场景，我们要做一个日志模块来收集处理不同的日志，日志区分包含三个维度的标准：模块、日志紧急程度、日志重要程度。模块分为：red、black、white；紧急程度分为：critical、normal；把重要程度分为：medium、low、high在RoutingKey字段中我们把这三个维度通过两个“.“连接起来。 
现在我们需要对black模块，紧急程度为critical，重要程度为high的日志分配到队列1打印到屏幕；对所以模块重要程度为high的日志和white紧急程度为critical的日志发送到队列2持久化到硬盘。如下示例：

  • RoutingKey为“black.critical.high”的日志会投递到queue1和queue2,。

  • RoutingKey为“red.critical.high”的日志会只投递到queue2。

  • RoutingKey为“white.critical.high”的日志会投递到queue2，并且虽然queue2的两个匹配规则都符合但只会向queue2投递一份。

新建TopicProduct用来发布三种routingkey的消息。

using System;
using System.Text;
using RabbitMQ.Client;
using RabbitMQ.Client.Events;

namespace TopicProduct
{
    class Program
    {
        static void Main(string[] args)
        {
            String exchangeName = "wytExchangeTopic";
            String routeKeyName1 = "black.critical.high";
            String routeKeyName2 = "red.critical.high";
            String routeKeyName3 = "white.critical.high";

            String message1 = "black-critical-high!";
            String message2 = "red-critical-high!";
            String message3 = "white-critical-high!";

            ConnectionFactory factory = new ConnectionFactory();
            factory.HostName = "192.168.63.129";
            factory.Port = 5672;
            factory.VirtualHost = "/wyt";
            factory.UserName = "wyt";
            factory.Password = "wyt";

            using (IConnection connection=factory.CreateConnection())
            {
                using (IModel channel=connection.CreateModel())
                {
                    channel.ExchangeDeclare(exchange: exchangeName, type: "topic", durable: true, autoDelete: false, arguments: null);

                    IBasicProperties properties = channel.CreateBasicProperties();
                    properties.Persistent = true;

                    Byte[] body1 = Encoding.UTF8.GetBytes(message1);
                    Byte[] body2 = Encoding.UTF8.GetBytes(message2);
                    Byte[] body3 = Encoding.UTF8.GetBytes(message3);

                    //消息推送
                    channel.BasicPublish(exchange: exchangeName, routingKey:routeKeyName1,basicProperties: properties, body: body1);
                    channel.BasicPublish(exchange: exchangeName, routingKey: routeKeyName2, basicProperties: properties, body: body2);
                    channel.BasicPublish(exchange: exchangeName, routingKey: routeKeyName3, basicProperties: properties, body: body3);

                    Console.WriteLine(" [x] Sent {0}", message1);
                    Console.WriteLine(" [x] Sent {0}", message2);
                    Console.WriteLine(" [x] Sent {0}", message3);
                }
            }

            Console.WriteLine(" Press [enter] to exit.");
            Console.ReadLine();
        }
    }
}

　　

using System;
using System.Text;
using RabbitMQ.Client;
using RabbitMQ.Client.Events;

namespace TopicProduct
{
    class Program
    {
        static void Main(string[] args)
        {
            String exchangeName = "wytExchangeTopic";
            String routeKeyName1 = "black.critical.high";
            String routeKeyName2 = "red.critical.high";
            String routeKeyName3 = "white.critical.high";

            String message1 = "black-critical-high!";
            String message2 = "red-critical-high!";
            String message3 = "white-critical-high!";

            ConnectionFactory factory = new ConnectionFactory();
            factory.HostName = "192.168.63.129";
            factory.Port = 5672;
            factory.VirtualHost = "/wyt";
            factory.UserName = "wyt";
            factory.Password = "wyt";

            using (IConnection connection=factory.CreateConnection())
            {
                using (IModel channel=connection.CreateModel())
                {
                    channel.ExchangeDeclare(exchange: exchangeName, type: "topic", durable: true, autoDelete: false, arguments: null);

                    IBasicProperties properties = channel.CreateBasicProperties();
                    properties.Persistent = true;

                    Byte[] body1 = Encoding.UTF8.GetBytes(message1);
                    Byte[] body2 = Encoding.UTF8.GetBytes(message2);
                    Byte[] body3 = Encoding.UTF8.GetBytes(message3);

                    //消息推送
                    channel.BasicPublish(exchange: exchangeName, routingKey:routeKeyName1,basicProperties: properties, body: body1);
                    channel.BasicPublish(exchange: exchangeName, routingKey: routeKeyName2, basicProperties: properties, body: body2);
                    channel.BasicPublish(exchange: exchangeName, routingKey: routeKeyName3, basicProperties: properties, body: body3);

                    Console.WriteLine(" [x] Sent {0}", message1);
                    Console.WriteLine(" [x] Sent {0}", message2);
                    Console.WriteLine(" [x] Sent {0}", message3);
                }
            }

            Console.WriteLine(" Press [enter] to exit.");
            Console.ReadLine();
        }
    }
}

新建TopicCustomerA接收一种消息

using System;
using System.Text;
using RabbitMQ.Client;
using RabbitMQ.Client.Events;

namespace TopicCustomerA
{
    class Program
    {
        static void Main(string[] args)
        {
            String exchangeName = "wytExchangeTopic";
            String routeKeyName1 = "black.critical.high";

            ConnectionFactory factory = new ConnectionFactory();
            factory.HostName = "192.168.63.129";
            factory.Port = 5672;
            factory.VirtualHost = "/wyt";
            factory.UserName = "wyt";
            factory.Password = "wyt";

            using (IConnection connection=factory.CreateConnection())
            {
                using (IModel channel=connection.CreateModel())
                {
                    channel.ExchangeDeclare(exchange: exchangeName, type: "topic", durable: true, autoDelete: false, arguments: null);

                    String queueName = channel.QueueDeclare().QueueName;

                    channel.QueueBind(queue: queueName, exchange: exchangeName, routingKey: routeKeyName1, arguments: null);

                    EventingBasicConsumer consumer = new EventingBasicConsumer(channel);
                    consumer.Received += (model, ea) =>
                    {
                        var body = ea.Body;
                        var message = Encoding.UTF8.GetString(body);
                        var routingKey = ea.RoutingKey;
                        Console.WriteLine(" [x] Received '{0}':'{1}'", routingKey, message);

                        channel.BasicAck(deliveryTag: ea.DeliveryTag, multiple: false);
                    };

                    channel.BasicConsume(queue: queueName, autoAck: false, consumer: consumer);

                    Console.WriteLine(" Press [enter] to exit.");
                    Console.ReadLine();
                }
            }
        }
    }
}

　　

using System;
using System.Text;
using RabbitMQ.Client;
using RabbitMQ.Client.Events;

namespace TopicCustomerA
{
    class Program
    {
        static void Main(string[] args)
        {
            String exchangeName = "wytExchangeTopic";
            String routeKeyName1 = "black.critical.high";

            ConnectionFactory factory = new ConnectionFactory();
            factory.HostName = "192.168.63.129";
            factory.Port = 5672;
            factory.VirtualHost = "/wyt";
            factory.UserName = "wyt";
            factory.Password = "wyt";

            using (IConnection connection=factory.CreateConnection())
            {
                using (IModel channel=connection.CreateModel())
                {
                    channel.ExchangeDeclare(exchange: exchangeName, type: "topic", durable: true, autoDelete: false, arguments: null);

                    String queueName = channel.QueueDeclare().QueueName;

                    channel.QueueBind(queue: queueName, exchange: exchangeName, routingKey: routeKeyName1, arguments: null);

                    EventingBasicConsumer consumer = new EventingBasicConsumer(channel);
                    consumer.Received += (model, ea) =>
                    {
                        var body = ea.Body;
                        var message = Encoding.UTF8.GetString(body);
                        var routingKey = ea.RoutingKey;
                        Console.WriteLine(" [x] Received '{0}':'{1}'", routingKey, message);

                        channel.BasicAck(deliveryTag: ea.DeliveryTag, multiple: false);
                    };

                    channel.BasicConsume(queue: queueName, autoAck: false, consumer: consumer);

                    Console.WriteLine(" Press [enter] to exit.");
                    Console.ReadLine();
                }
            }
        }
    }
}

新建TopicCustomerB接收两种消息

using System;
using System.Text;
using RabbitMQ.Client;
using RabbitMQ.Client.Events;

namespace TopicCustomerB
{
    class Program
    {
        static void Main(string[] args)
        {
            String exchangeName = "wytExchangeTopic";
            String routeKeyName1 = "red.critical.*";
            String routeKeyName2 = "white.critical.*";

            ConnectionFactory factory = new ConnectionFactory();
            factory.HostName = "192.168.63.129";
            factory.Port = 5672;
            factory.VirtualHost = "/wyt";
            factory.UserName = "wyt";
            factory.Password = "wyt";

            using (IConnection connection = factory.CreateConnection())
            {
                using (IModel channel = connection.CreateModel())
                {
                    channel.ExchangeDeclare(exchange: exchangeName, type: "topic", durable: true, autoDelete: false, arguments: null);

                    String queueName = channel.QueueDeclare().QueueName;

                    channel.QueueBind(queue: queueName, exchange: exchangeName, routingKey: routeKeyName1, arguments: null);
                    channel.QueueBind(queue: queueName, exchange: exchangeName, routingKey: routeKeyName2, arguments: null);

                    EventingBasicConsumer consumer = new EventingBasicConsumer(channel);
                    consumer.Received += (model, ea) =>
                    {
                        var body = ea.Body;
                        var message = Encoding.UTF8.GetString(body);
                        var routingKey = ea.RoutingKey;
                        Console.WriteLine(" [x] Received '{0}':'{1}'", routingKey, message);

                        channel.BasicAck(deliveryTag: ea.DeliveryTag, multiple: false);
                    };

                    channel.BasicConsume(queue: queueName, autoAck: false, consumer: consumer);

                    Console.WriteLine(" Press [enter] to exit.");
                    Console.ReadLine();
                }
            }
        }
    }
}

　　

using System;
using System.Text;
using RabbitMQ.Client;
using RabbitMQ.Client.Events;

namespace TopicCustomerB
{
    class Program
    {
        static void Main(string[] args)
        {
            String exchangeName = "wytExchangeTopic";
            String routeKeyName1 = "red.critical.*";
            String routeKeyName2 = "white.critical.*";

            ConnectionFactory factory = new ConnectionFactory();
            factory.HostName = "192.168.63.129";
            factory.Port = 5672;
            factory.VirtualHost = "/wyt";
            factory.UserName = "wyt";
            factory.Password = "wyt";

            using (IConnection connection = factory.CreateConnection())
            {
                using (IModel channel = connection.CreateModel())
                {
                    channel.ExchangeDeclare(exchange: exchangeName, type: "topic", durable: true, autoDelete: false, arguments: null);

                    String queueName = channel.QueueDeclare().QueueName;

                    channel.QueueBind(queue: queueName, exchange: exchangeName, routingKey: routeKeyName1, arguments: null);
                    channel.QueueBind(queue: queueName, exchange: exchangeName, routingKey: routeKeyName2, arguments: null);

                    EventingBasicConsumer consumer = new EventingBasicConsumer(channel);
                    consumer.Received += (model, ea) =>
                    {
                        var body = ea.Body;
                        var message = Encoding.UTF8.GetString(body);
                        var routingKey = ea.RoutingKey;
                        Console.WriteLine(" [x] Received '{0}':'{1}'", routingKey, message);

                        channel.BasicAck(deliveryTag: ea.DeliveryTag, multiple: false);
                    };

                    channel.BasicConsume(queue: queueName, autoAck: false, consumer: consumer);

                    Console.WriteLine(" Press [enter] to exit.");
                    Console.ReadLine();
                }
            }
        }
    }
}

先运行TopicCustomerA和TopicCustomerB保持订阅状态。然后执行TopicProduct发布消息。TopicCustomerA和TopicCustomerB收到的消息如下：

rabbitMQ tipic 模式的更多相关文章

  1. 1.RabbitMq - Work 模式

    RabbitMq - Work 模式 一.什么是Work模式 如果有几个消息都需要处理,且每个消息的处理时间很长,仅有一个消费者,那么当它在处理一个消息的时候,其他消息就只有等待. 等待有时候是好的, ...

  2. Rabbitmq -Publish_Subscribe模式- python编码实现

    what is Exchanges ?? Let's quickly go over what we covered in the previous tutorials: A producer is ...

  3. RabbitMQ事物模式

    Rabbit的消息确认机制(事务+confirm)在rabbmitmq中我们可以通过持久化数据解决rabbitmq服务器异常的数据丢失问题问题:生产者将消息发送出去之后消息到底有没有到达rabbitm ...

  4. RabbitMQ广播模式

    广播模式:1对多,produce发送一则消息多个consumer同时收到.注意:广播是实时的,produce只负责发出去,不会管对端是否收到,若发送的时刻没有对端接收,那消息就没了,因此在广播模式下设 ...

  5. RabbitMQ镜像模式双节点部署时故障转移过程中队列中消息的状态

    场景 现有节点Node1和Node2,建立Exchange:yu.exchange,创建队列yu1.queue镜像队列master位于Node1,yu2.queue镜像队列位于Node2,使用topi ...

  6. 使用rabbitmq rpc 模式

        服务器端     安装 ubuntu 16.04 server     安装 rabbitmq-server     设置 apt 源 curl -s https://packagecloud ...

  7. RabbitMQ工作模式

    ------------恢复内容开始------------ RabbitMQ基本概念: Producer:生产者(消息的提供者) Consumer:消费者(消息的使用者) Message:消息(程序 ...

  8. RabbitMQ 消息模式

    消息模式实例 视频教程:https://ke.qq.com/course/304104 编写代码前,最好先添加好用户并设置virtual hosts 一.简单模式 1.导入jar包 <depen ...

  9. 干货！基于SpringBoot的RabbitMQ多种模式队列实战

    目录 环境准备 安装RabbitMQ 依赖 连接配置 五种队列模式实现 1 点对点的队列 2 工作队列模式Work Queue 3 路由模式Routing 4 发布/订阅模式Publish/Subsc ...

随机推荐

  1. 13 Vue事件处理

    监听事件 可以用 v-on 指令监听 DOM 事件,并在触发时运行一些 JavaScript 代码. 可以用 v-on 指令监听 DOM 事件,并在触发时运行一些 JavaScript 代码. 示例: ...

  2. BZOJ4543 Hotel加强版（长链剖分）

    题意 求一棵树上,两两距离相等的三个点的三元组(无序)的个数. 题解 转自 CaptainHarryChen 的博客 CODE 代码中的f,gf,gf,g对应题解中的num,waynum,waynum ...

  3. sql server 存储过程 output 和return的使用 方法,详解

    SQL Server目前正日益成为WindowNT操作系统上面最为重要的一种数据库管理系统,随着 SQL Server2000的推出,微软的这种数据库服务系统真正地实现了在WindowsNT/2000 ...

  4. 洛谷 UVA10298 Power Strings 题解

    Analysis 结论:设字符串长度为n,最长相同前后缀的长度为kmp[i],如n%(n-kmp[n])=0,则答案为n/(n-kmp[n]),否则为1. 如果循环节多于一个,以前n-kmp[n]个为 ...

  5. 073_使用 shell 脚本打印如下图形

    #!/bin/bash #打印第一组图片#for(())为类 C 语言的语法格式,也可以使用 for i in;do;done 的格式替换#for((i=1;i<=9;i++))循环会执行 9 ...

  6. 学生管理系统——数据库、java基础

    1.项目分层 view层:视图层 controller层:控制层 service层:业务层 dao层:数据库访问层 domain:实体包 tools:工具类 2.jar包 3.配置文件 4.程序设计 ...

  7. Ubuntu 14.04 indigo 相关依赖

    sudo apt-get install libbullet-dev sudo apt-get install ros-indigo-bfl sudo apt-get install libsdl-d ...

  8. GFS中元数据的管理

    GFS 元数据(metadata)中包含三部分: GFS元数据的管理方式: 1.文件的命名空间和块的命名空间: 采用持久化的方式. 对于文件和块的命名空间以及从文件到块的映射:通过向操作日志登记修改而 ...

  9. hadoop(1)---hadoop的介绍和几种模式。

    一.什么是hadoop? Hadoop软件库是一个开源框架,允许使用简单的编程模型跨计算机集群分布式处理大型数据集.它旨在从单个服务器扩展到数千台计算机,每台计算机都提供本地计算和存储.库本身不是依靠 ...

  10. linux下安装apache和php和mysql

    我的系统环境时ubuntu 18.04.3,为了ROS: 首先:安装下面一堆软件包: sudo apt install nginx nginx-doc fcgiwrap sudo apt instal ...