第二节：RabbitMq基本使用(生产消费者、优先级队列、发布订阅等)

一. RabbitMq基本使用

1. 条件准备

　(1).通过指令【net start rabbitmq】启动服务

　(2).准备1个生产者程序Producer, 1个消费者程序Consumer01

　(3).通过Nuget给三个程序安装【RabbitMQ.Client 6.4.0】

　(4).通过地址：http://127.0.0.1:15672 访问RabbitMq的管理系统,进行监控，账号和密码都是guest

　(5).设置程序的启动顺序，先启动Producer，然后延迟2s启动Consumer01

2. 核心代码剖析

　(1). 创建连接工厂ConnectionFactory，指定HostName、UserName、Password(连接地址、账号、密码)，也可以指定VirtualHost。

PS：默认情况向，RabbitMq的信息都是在“/”这一虚拟机中，比如我可以指定Virtual为“/ypf”，当然需要先去可视化界面中创建/ypf，否则程序会报错

(关于 RabbitMq、Queue、Exchange、Virtual之间的关系，详见第一节)

　(2).创建连接 factory.CreateConnection() 和创建传输信道 connection.CreateModel()

　(3).创建队列： QueueDeclare

channel.QueueDeclare(queue: "SimpleProducerQueue", durable: true, exclusive: false, autoDelete: false, arguments: null);

A. queue: 队列名称

B. durable：是否持久化到硬盘， true 则设置队列为持久化，持久化的队列会存磁盘，在服务器重启的时候可以保证不丢失相关信息。

C.exclusive：设置队列是否排他。为 true 则设置队列为排他的。如果一个队列被声明为排他队列，该队列仅对首次声明它的连接可见，并在连接断开时自动删除。

　这里需要注意 3点:

　　① 排他队列是基于连接( Connection) 可见的，同个连接的不同信道 (Channel) 是可以同时访问同一连接创建的排他队列;

　　② "首次"是指如果1个连接己经声明了排他队列，其他连接是不允许建立同名的排他队列的，这个与普通队列不同:

　　③ 即使该队列是持久化的，一旦连接关闭或者客户端退出，该排他队列都会被自动删除，这种队列适用于一个客户端同时发送和读取消息的应用场景

D. autoDelete：至少有一个消费者连接到这个队列，之后所有与这个队列连接的消费者都断开时，才会自动删除

E. arguments：设置队列的其他一些参数，如 x-rnessage-ttl 、x-expires 、x-rnax-length 、x-rnax-length-bytes 等等。

　(4).创建交换机(交换机)：ExchangeDeclare

 channel.ExchangeDeclare(exchange: "SimpleProducerExChange", type: ExchangeType.Direct, durable: true, autoDelete: false, arguments: null);

A. exchange：交换机名称。

B. type：交换机类型，主要有（Direct、Fanout、Topic、Header）

C. durable：是否持久化到磁盘

D. autoDelete：自动删除，至少有一个队列与这个交换机绑定，之后，所有与这个交换机绑定的队列都与此解绑，才会触发删除

E. arguments：设置交换机的一些参数。

　(5).队列和交换机绑定：QueueBind

  channel.QueueBind(queue: "SimpleProducerQueue", exchange: "SimpleProducerExChange", routingKey: string.Empty, arguments: null);

A. queue：需要绑定的队列名称

B. exchange：需要绑定的交换机名称

C. routingKey：路由key，用于指定发送到队列的规则。

D. arguments：设置一些参数

　(6).发送消息：BasicPublish

IBasicProperties basicProperties = channel.CreateBasicProperties();
basicProperties.Persistent = true;  //配置消息持久化
//basicProperties.DeliveryMode = 2;
string message = $"ypf{i}";
byte[] body = Encoding.UTF8.GetBytes(message);
//发消息(不指定路由key)
channel.BasicPublish(exchange: "SimpleProducerExChange",  routingKey: string.Empty,  basicProperties: basicProperties,body: body);

A. exchange：发送消息通过的交换机名称

B. routingKey：绑定路由key，用于指定发送的规则。

C. basicProperties：配置消息属性（比如消息持久化、消息的优先级）

D. body：发送的消息内容

　(7).接收消息：事件模式，BasicConsume+Received

//channel.QueueDeclare(queue: "SimpleProducerQueue", durable: true, exclusive: false, autoDelete: false, arguments: null);
//channel.ExchangeDeclare(exchange: "SimpleProducerExChange", type: ExchangeType.Direct, durable: true, autoDelete: false, arguments: null);
//channel.QueueBind(queue: "SimpleProducerQueue", exchange: "SimpleProducerExChange", routingKey: string.Empty, arguments: null);

var consumer = new EventingBasicConsumer(channel);
consumer.Received += (model, ea) =>
{
   var body = ea.Body;
   var message = Encoding.UTF8.GetString(body.ToArray());
   Console.WriteLine($"消费者01 接收消息: {message}");
};
channel.BasicConsume(queue: "SimpleProducerQueue", autoAck: true, consumer: consumer);  //进行消费

A. queue：消费的队列（这里只能指定一个队列哦）

B. autoAck：true 接收到传递过来的消息后acknowledged（应答服务器），false 接收到消息后不应答服务器.

C. consumer：指定消费者。

注意：消费者可以不用再次声明路由、交换机、绑定，前提是生产者已经执行，该消费的队列在RabbitMq中已经存在了。

二. 几个场景

1. 生产者-消费者

(1). 1个生产者-1个消费者

模拟：生产者生产的同时，消费者进行消费。

剖析：这里采用的是ExchangeType.Direct，但是绑定的时候不指定路由key

生产者代码

{
                //设置控制台的颜色
                Console.ForegroundColor = ConsoleColor.Red;

                ConnectionFactory factory = new ConnectionFactory();
                factory.HostName = "localhost";//RabbitMQ服务在本地运行
                factory.UserName = "guest";//用户名
                factory.Password = "guest";//密码 
                //factory.VirtualHost = "/ypf";
                using (IConnection connection = factory.CreateConnection())
                {
                    using (IModel channel = connection.CreateModel())
                    {
                        //创建队列
                        channel.QueueDeclare(queue: "SimpleProducerQueue", durable: true, exclusive: false, autoDelete: false, arguments: null);
                        //创建交换机(Direct路由)
                        channel.ExchangeDeclare(exchange: "SimpleProducerExChange", type: ExchangeType.Direct, durable: true, autoDelete: false, arguments: null);
                        //队列和路由绑定
                        channel.QueueBind(queue: "SimpleProducerQueue", exchange: "SimpleProducerExChange", routingKey: string.Empty, arguments: null);

                        Console.WriteLine("------------------------------下面是生产者开始生产消息(2s后开始)------------------------------------------");
                        Thread.Sleep(2000);
                        for (int i = 1; i <= 100; i++)
                        {
                            IBasicProperties basicProperties = channel.CreateBasicProperties();
                            basicProperties.Persistent = true;
                            //basicProperties.DeliveryMode = 2;
                            string message = $"ypf{i}";
                            byte[] body = Encoding.UTF8.GetBytes(message);
                            //发消息(不指定路由key)
                            channel.BasicPublish(exchange: "SimpleProducerExChange",
                                                 routingKey: string.Empty,
                                                 basicProperties: basicProperties,
                                                 body: body);
                            Console.WriteLine($"消息：{message} 已发送~");
                            Thread.Sleep(500);
                        }
                    }
                }
            }

View Code

消费者代码

 {
                Thread.Sleep(2000);  //休眠两秒，等待生产者
                Console.ForegroundColor = ConsoleColor.Green;

                var factory = new ConnectionFactory();
                factory.HostName = "localhost";//RabbitMQ服务在本地运行
                factory.UserName = "guest";//用户名
                factory.Password = "guest";//密码 
                using (var connection = factory.CreateConnection())
                {
                    using (var channel = connection.CreateModel())
                    {                     
                        try
                        {
                            //channel.QueueDeclare(queue: "SimpleProducerQueue", durable: true, exclusive: false, autoDelete: false, arguments: null);
                            //channel.ExchangeDeclare(exchange: "SimpleProducerExChange", type: ExchangeType.Direct, durable: true, autoDelete: false, arguments: null);
                            //channel.QueueBind(queue: "SimpleProducerQueue", exchange: "SimpleProducerExChange", routingKey: string.Empty, arguments: null);

                            var consumer = new EventingBasicConsumer(channel);
                            consumer.Received += (model, ea) =>
                            {
                                var body = ea.Body;
                                var message = Encoding.UTF8.GetString(body.ToArray());
                                Console.WriteLine($"消费者01 接收消息: {message}");
                            };
                            channel.BasicConsume(queue: "SimpleProducerQueue", autoAck: true, consumer: consumer);
                            Console.WriteLine(" Press [enter] to exit.");
                            Console.ReadLine();
                        }
                        catch (Exception ex)
                        {
                            Console.WriteLine(ex.Message);
                        }
                    }
                }
            }

View Code

运行效果

(2). 多个生产者-多个消费者

模拟：1个队列，利用多线程开始多个生产者生产的同时，多个消费者进行消费。

剖析：这里采用的是ExchangeType.Direct，但是绑定的时候不指定路由key

生产者代码：

 /// <summary>
    /// 模拟多个生产者
    /// </summary>
    public class ManyProducer
    {
        /// <summary>
        /// 生产者
        /// </summary>
        /// <param name="producerName">生产者名称</param>
        /// <param name="num">模拟消息内容</param>
        public static void Show(string producerName, int num)
        {
            ConnectionFactory factory = new ConnectionFactory();
            factory.HostName = "localhost";//RabbitMQ服务在本地运行
            factory.UserName = "guest";//用户名
            factory.Password = "guest";//密码 
            using (IConnection connection = factory.CreateConnection())
            {
                using (IModel channel = connection.CreateModel())
                {
                    channel.QueueDeclare(queue: "ManyProducerConsumerQueue", durable: true, exclusive: false, autoDelete: false, arguments: null);
                    channel.ExchangeDeclare(exchange: "ManyProducerConsumerExChange", type: ExchangeType.Direct, durable: true, autoDelete: false, arguments: null);
                    channel.QueueBind(queue: "ManyProducerConsumerQueue", exchange: "ManyProducerConsumerExChange", routingKey: string.Empty, arguments: null);
                    Console.ForegroundColor = ConsoleColor.Red;
                    Console.WriteLine($"生产者{producerName}已准备就绪~~~");
                    for (int i = num; i <= num + 100; i++)
                    {
                        string message = $"生产者{producerName}：消息{i}";
                        byte[] body = Encoding.UTF8.GetBytes(message);
                        channel.BasicPublish(exchange: "ManyProducerConsumerExChange",
                                             routingKey: string.Empty,
                                             basicProperties: null,
                                             body: body);
                        Console.WriteLine($"消息：{message} 已发送~");

                        Thread.Sleep(800);
                    }
                }
            }
        }
    }

View Code

{
                //模拟多个生产者，向同一个队列里生产消息(这里使用的一定一个队列, 路由可以1个或多个)
                Task.Run(() =>
                {
                    //生产者ypfProducer1从10开始生产消息
                    ManyProducer.Show("ypfProducer1", 10);
                });
                Task.Run(() =>
                {
                    //生产者ypfProducer2从500开始生产消息
                    ManyProducer.Show("ypfProducer2", 500);
                });
}

消费者代码

 /// <summary>
    /// 模拟多个消费者
    /// </summary>
    public class ManyConsumer
    {
        /// <summary>
        /// 消费者01
        /// </summary>
        public static void Show01()
        {
            var factory = new ConnectionFactory();
            factory.HostName = "localhost";//RabbitMQ服务在本地运行
            factory.UserName = "guest";//用户名
            factory.Password = "guest";//密码 
            using (var connection = factory.CreateConnection())
            {
                using (var channel = connection.CreateModel())
                {
                    Console.ForegroundColor = ConsoleColor.Green;
                    try
                    {
                        //channel.QueueDeclare(queue: "ManyProducerConsumerQueue", durable: true, exclusive: false, autoDelete: false, arguments: null);
                        //channel.ExchangeDeclare(exchange: "ManyProducerConsumerExChange", type: ExchangeType.Direct, durable: true, autoDelete: false, arguments: null);
                        //channel.QueueBind(queue: "ManyProducerConsumerQueue", exchange: "ManyProducerConsumerExChange", routingKey: string.Empty, arguments: null);
                        var consumer = new EventingBasicConsumer(channel);
                        consumer.Received += (model, ea) =>
                        {
                            var body = ea.Body;
                            var message = Encoding.UTF8.GetString(body.ToArray());
                            Console.WriteLine($"消费者001 接受消息: {message}");
                        };
                        channel.BasicConsume(queue: "ManyProducerConsumerQueue", autoAck: true, consumer: consumer);
                        Console.WriteLine(" Press [enter] to exit. 001");
                        Console.ReadLine();
                    }
                    catch (Exception ex)
                    {
                        Console.WriteLine(ex.Message);
                    }
                }
            }

        }



        /// <summary>
        /// 消费者02
        /// </summary>
        public static void Show02()
        {
            var factory = new ConnectionFactory();
            factory.HostName = "localhost";//RabbitMQ服务在本地运行
            factory.UserName = "guest";//用户名
            factory.Password = "guest";//密码 
            using var connection = factory.CreateConnection();
            using var channel = connection.CreateModel();
            Console.ForegroundColor = ConsoleColor.Green;
            try
            {
                //channel.QueueDeclare(queue: "ManyProducerConsumerQueue", durable: true, exclusive: false, autoDelete: false, arguments: null);
                //channel.ExchangeDeclare(exchange: "ManyProducerConsumerExChange", type: ExchangeType.Direct, durable: true, autoDelete: false, arguments: null);
                //channel.QueueBind(queue: "ManyProducerConsumerQueue", exchange: "ManyProducerConsumerExChange", routingKey: string.Empty, arguments: null);
                var consumer = new EventingBasicConsumer(channel);
                consumer.Received += (model, ea) =>
                {
                    var body = ea.Body;
                    var message = Encoding.UTF8.GetString(body.ToArray());
                    Console.WriteLine($"消费者002 接受消息: {message}");
                };
                channel.BasicConsume(queue: "ManyProducerConsumerQueue",
                             autoAck: true,
                             consumer: consumer);
                Console.WriteLine(" Press [enter] to exit. 002");
                Console.ReadLine();
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
            }
        }

        /// <summary>
        /// 消费者03
        /// </summary>
        public static void Show03()
        {
            var factory = new ConnectionFactory();
            factory.HostName = "localhost";//RabbitMQ服务在本地运行
            factory.UserName = "guest";//用户名
            factory.Password = "guest";//密码 
            using var connection = factory.CreateConnection();
            using var channel = connection.CreateModel();
            Console.ForegroundColor = ConsoleColor.Green;
            try
            {
                //channel.QueueDeclare(queue: "ManyProducerConsumerQueue", durable: true, exclusive: false, autoDelete: false, arguments: null);
                //channel.ExchangeDeclare(exchange: "ManyProducerConsumerExChange", type: ExchangeType.Direct, durable: true, autoDelete: false, arguments: null);
                //channel.QueueBind(queue: "ManyProducerConsumerQueue", exchange: "ManyProducerConsumerExChange", routingKey: string.Empty, arguments: null);
                var consumer = new EventingBasicConsumer(channel);
                consumer.Received += (model, ea) =>
                {
                    var body = ea.Body;
                    var message = Encoding.UTF8.GetString(body.ToArray());
                    Console.WriteLine($"消费者003 接受消息: {message}");
                };
                channel.BasicConsume(queue: "ManyProducerConsumerQueue",
                             autoAck: true,
                             consumer: consumer);
                Console.WriteLine(" Press [enter] to exit 003.");
                Console.ReadLine();

            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
            }
        }
    }

View Code

 {
                Thread.Sleep(2000);  //休眠2秒，等待生产者
                Task.Run(() =>
                {
                    ManyConsumer.Show01();
                });
                Task.Run(() =>
                {
                    ManyConsumer.Show02();
                });
                Task.Run(() =>
                {
                    ManyConsumer.Show03();
                });
}

运行效果

2. 优先级队列

模拟：用户购买东西，依次下单，进行排队，但是svip级别最高，可以先拿到东西，vip级别次之，普通用户最后。

剖析：这里采用的是ExchangeType.Direct，指定路由key，通过对了的arguments参数配置支持优先级队列，然后发送消息的时候，通过Priority设置级别，数值越大级别越高。

生产者代码：

 /// <summary>
    /// 优先级队列
    /// </summary>
    public class PriorityQueue
    {
        public static void Show()
        {
            ConnectionFactory factory = new ConnectionFactory();
            factory.HostName = "localhost";//RabbitMQ服务在本地运行
            factory.UserName = "guest";//用户名
            factory.Password = "guest";//密码 
            using (IConnection connection = factory.CreateConnection())
            {
                using (IModel channel = connection.CreateModel())
                {
                    channel.QueueDeclare(queue: "PriorityQueue", durable: true, exclusive: false, autoDelete: false, arguments: new Dictionary<string, object>() {
                             {"x-max-priority",10 }  //指定队列要支持优先级设置；
                       });
                    channel.ExchangeDeclare(exchange: "PriorityQueueExchange", type: ExchangeType.Direct, durable: true, autoDelete: false, arguments: null);
                    channel.QueueBind(queue: "PriorityQueue", exchange: "PriorityQueueExchange", routingKey: "PriorityKey");
                    Console.ForegroundColor = ConsoleColor.Red;
                    //下面发送消息,并设置消息的优先级
                    {
                        string[] questionList = {  "普通用户A购买东西", "vip用户B购买东西", "普通用户C购买东西", "普通用户D购买东西", "svip用户F购买东西", "vip用户G购买东西" };
                        //设置消息优先级
                        IBasicProperties props = channel.CreateBasicProperties();
                        foreach (string questionMsg in questionList)
                        {
                            //包含vip的优先级设置的高一些
                            if (questionMsg.StartsWith("svip"))
                            {
                                props.Priority = 9;                  //svip设置级别最高
                                channel.BasicPublish(exchange: "PriorityQueueExchange",
                                               routingKey: "PriorityKey",
                                               basicProperties: props,
                                               body: Encoding.UTF8.GetBytes(questionMsg));
                            }
                            else if (questionMsg.StartsWith("vip"))
                            {
                                props.Priority = 5;                 //vip级别次之
                                channel.BasicPublish(exchange: "PriorityQueueExchange",
                                               routingKey: "PriorityKey",
                                               basicProperties: props,
                                               body: Encoding.UTF8.GetBytes(questionMsg));
                            }
                            else
                            {
                                props.Priority = 1;               //普通用户最后   
                                channel.BasicPublish(exchange: "PriorityQueueExchange",
                                               routingKey: "PriorityKey",
                                               basicProperties: props,
                                               body: Encoding.UTF8.GetBytes(questionMsg));
                            }
                            Console.WriteLine($"{questionMsg} 已发送~~");
                        }
                    }
                    Console.Read();
                }
            }
        }
    }

View Code

{
      PriorityQueue.Show();
}

消费者代码：

 /// <summary>
    /// 优先级队列，消费者
    /// </summary>
    public class PriorityQueue
    {
        public static void Show()
        {
            Console.ForegroundColor = ConsoleColor.Green;

            var factory = new ConnectionFactory();
            factory.HostName = "localhost";//RabbitMQ服务在本地运行
            factory.UserName = "guest";//用户名
            factory.Password = "guest";//密码 
            using (var connection = factory.CreateConnection())
            {
                using (var channel = connection.CreateModel())
                {
                    //channel.QueueDeclare(queue: "PriorityQueue", durable: true, exclusive: false, autoDelete: false, arguments: new Dictionary<string, object>() {
                    //         {"x-max-priority",10 }  //指定队列要支持优先级设置；
                    //   });
                    //channel.ExchangeDeclare(exchange: "PriorityQueueExchange", type: ExchangeType.Direct, durable: true, autoDelete: false, arguments: null);
                    //channel.QueueBind(queue: "PriorityQueue", exchange: "PriorityQueueExchange", routingKey: "PriorityKey");

                   
                    //定义消费者                                      
                    var consumer = new EventingBasicConsumer(channel);
                    consumer.Received += (model, ea) =>
                    {
                        string msg = Encoding.UTF8.GetString(ea.Body.ToArray());
                        Console.WriteLine(msg);
                        Thread.Sleep(300);
                    };
                    Console.WriteLine("消费者准备就绪....");
                    //处理消息
                    channel.BasicConsume(queue: "PriorityQueue", autoAck: true, consumer: consumer);
                    Console.ReadKey();

                }
            }
        }
    }

View Code

{
                Thread.Sleep(3000);
                PriorityQueue.Show();
}

运行结果：svip虽然是第5个下单的，但是消费的时候是第1个消费的，然后vip次之，普通用户最后。

3. 发布订阅模式

　也可以叫做观察者模式，实质上就是一个交换机绑定多个队列，每个队列就是一个订阅者，发布者每发布一条消息，同时向多个订阅者的队列中发送消息，然后每个订阅者分别去自己的队列中消费即可。

剖析：这里采用Fanout交换机的模式处理这个场景最为恰当（下一节会详细介绍）

发布者代码

/// <summary>
    /// 发布订阅模式-发布者
    /// </summary>
    public class PublishSubscribeConsumer
    {
        public static void Show()
        {
            var factory = new ConnectionFactory();
            factory.HostName = "localhost";//RabbitMQ服务在本地运行
            factory.UserName = "guest";//用户名
            factory.Password = "guest";//密码 
            using (var connection = factory.CreateConnection())
            {
                using (IModel channel = connection.CreateModel())
                {
                    channel.QueueDeclare(queue: "PublishSubscrib01", durable: true, exclusive: false, autoDelete: false, arguments: null);
                    channel.QueueDeclare(queue: "PublishSubscrib02", durable: true, exclusive: false, autoDelete: false, arguments: null);
                    channel.ExchangeDeclare(exchange: "PublishSubscribExChange", type: ExchangeType.Fanout, durable: true, autoDelete: false, arguments: null);
                    channel.QueueBind(queue: "PublishSubscrib01", exchange: "PublishSubscribExChange", routingKey: string.Empty, arguments: null);
                    channel.QueueBind(queue: "PublishSubscrib02", exchange: "PublishSubscribExChange", routingKey: string.Empty, arguments: null);
                    Console.ForegroundColor = ConsoleColor.Red;
                    Console.WriteLine("开始发布消息~~~~"); 
                    for (int i = 1; i <= 20; i++)
                    { 
                        string message = $"发布第{i}条消息...";
                        byte[] body = Encoding.UTF8.GetBytes(message);
                        channel.BasicPublish(exchange: "PublishSubscribExChange",
                                        routingKey: string.Empty,
                                        basicProperties: null,
                                        body: body); 
                        Console.WriteLine(message);
                        Thread.Sleep(200);
                    }
                }
            }
        }
    }

View Code

{
     PublishSubscribeConsumer.Show();
}

订阅者代码

 /// <summary>
    /// 发布订阅-订阅者
    /// </summary>
    public class PublishSubscribeConsumer
    {
        /// <summary>
        /// 订阅者1
        /// </summary>
        public static void Show1()
        {
            var factory = new ConnectionFactory();
            factory.HostName = "localhost";//RabbitMQ服务在本地运行
            factory.UserName = "guest";//用户名
            factory.Password = "guest";//密码 
            using (var connection = factory.CreateConnection())
            {
                using (var channel = connection.CreateModel())
                { 
                    Console.ForegroundColor = ConsoleColor.Green;
                    //channel.QueueDeclare(queue: "PublishSubscrib01", durable: true, exclusive: false, autoDelete: false, arguments: null);
                    //channel.ExchangeDeclare(exchange: "PublishSubscribExChange", type: ExchangeType.Fanout, durable: true, autoDelete: false, arguments: null);
                    //channel.QueueBind(queue: "PublishSubscrib01", exchange: "PublishSubscribExChange", routingKey: string.Empty, arguments: null);                     
                    Console.WriteLine("订阅者01 已经准备就绪~~");
                    try
                    {
                        var consumer = new EventingBasicConsumer(channel); 
                        consumer.Received += (model, ea) =>
                        { 
                                var body = ea.Body;
                                var message = Encoding.UTF8.GetString(body.ToArray());
                                Console.WriteLine($"订阅者01收到消息:{message} ~");  
                        };
                        channel.BasicConsume(queue: "PublishSubscrib01", autoAck: true, consumer: consumer); 
                        Console.ReadLine();
                    }
                    catch (Exception ex)
                    {
                        Console.WriteLine(ex.Message);
                    } 
                }
            }
        }

        /// <summary>
        /// 订阅者2
        /// </summary>
        public static void Show2()
        {
            var factory = new ConnectionFactory();
            factory.HostName = "localhost";//RabbitMQ服务在本地运行
            factory.UserName = "guest";//用户名
            factory.Password = "guest";//密码 
            using (var connection = factory.CreateConnection())
            {
                using (var channel = connection.CreateModel())
                {
                    Console.ForegroundColor = ConsoleColor.Green;
                    //channel.QueueDeclare(queue: "PublishSubscrib02", durable: true, exclusive: false, autoDelete: false, arguments: null);
                    //channel.ExchangeDeclare(exchange: "PublishSubscribExChange", type: ExchangeType.Fanout, durable: true, autoDelete: false, arguments: null);
                    //channel.QueueBind(queue: "PublishSubscrib02", exchange: "PublishSubscribExChange", routingKey: string.Empty, arguments: null);

                    Console.WriteLine("订阅者02 已经准备就绪~~");
                    try
                    {
                        var consumer = new EventingBasicConsumer(channel);
                        consumer.Received += (model, ea) =>
                        {
                            var body = ea.Body;
                            var message = Encoding.UTF8.GetString(body.ToArray());
                            Console.WriteLine($"订阅者02收到消息:{message} ~");
                        };
                        channel.BasicConsume(queue: "PublishSubscrib02", autoAck: true, consumer: consumer);
                        Console.ReadLine();
                    }
                    catch (Exception ex)
                    {
                        Console.WriteLine(ex.Message);
                    }
                }
            }
        }

    }

View Code

 {
                Thread.Sleep(2000);

                Task.Run(() =>
                {
                    PublishSubscribeConsumer.Show1();
                });
                Task.Run(() =>
                {
                    PublishSubscribeConsumer.Show2();
                });
}

运行结果 (订阅者1和订阅者2分别拿到自己的消息)

作者 : Yaopengfei(姚鹏飞)
博客地址 : http://www.cnblogs.com/yaopengfei/
声明1 : 如有错误，欢迎讨论，请勿谩骂^_^。
声明2 : 原创博客请在转载时保留原文链接或在文章开头加上本人博客地址，否则保留追究法律责任的权利。

posted @ 2021-04-15 20:53 Yaopengfei 阅读(1276) 评论(2) 编辑收藏举报

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