1：RabbitMQ是个啥？（专业术语参考自网络）

　RabbitMQ是实现了高级消息队列协议（AMQP）的开源消息代理软件（亦称面向消息的中间件）。

　　RabbitMQ服务器是用Erlang语言编写的，Erlang是专门为高并发而生的语言，而集群和故障转移是构建在开发电信平台框架上的。所有主要的编程语言均有与代理接口通讯的客户端库

2：使用RabbitMQ有啥好处？

RabbitMQ是使用Erlang语言开发的开源消息队列系统，基于AMQP协议来实现。
AMQP的主要特征是面向消息、队列、路由（包括点对点和发布/订阅）、可靠性、安全。
AMQP协议更多用在企业系统内，对数据一致性、稳定性和可靠性要求很高的场景，对性能和吞吐量的要求还在其次。
RabbitMQ的可靠性是非常好的，数据能够保证百分之百的不丢失。可以使用镜像队列，它的稳定性非常好。所以说在我们互联网的金融行业。

对数据的稳定性和可靠性要求都非常高的情况下，我们都会选择RabbitMQ。当然没有kafka性能好，但是要比AvtiveMQ性能要好很多。也可以自己做一些性能的优化。

RabbitMQ可以构建异地双活架构，包括每一个节点存储方式可以采用磁盘或者内存的方式，

3:RabbitMq的安装以及环境搭建等：

网络上有很多关于怎么搭建配置RabbitMq服务环境的详细文章，也比较简单，这里不再说明，本人是Docker上面的pull RabbitMq 镜像来安装的！

3.1：运行容器的命令如下：

docker run -d --hostname Log --restart=always --name rabbitmq -p 5672:5672 -p 15672:15672 -e RABBITMQ_DEFAULT_USER=log_user -e RABBITMQ_DEFAULT_PASS=331QQFEG123 rabbitmq:3-management

4：RabbitMq的使用场景主要有哪些，啥时候用或者不用？

4.1什么时候使用MQ？

1）数据驱动的任务依赖

2）上游不关心多下游执行结果

3）异步返回执行时间长

4.2什么时候不使用MQ？

需要实时关注执行结果 （eg：同步调用）

5：具体C#怎么使用RabbitMq?下面直接上code和测试截图了（Demo环境是.NetCore3.1控制台+Docker上的RabbitMQ容器来进行的）

6：sample模式，就是简单地队列模式，一进一出的效果差不多，测试截图：

Code:

//简单生产端 ui调用者using System;namespace RabbitMqPublishDemo{ using MyRabbitMqService; using System.Runtime.CompilerServices; class Program { static void Main(string[] args) { //就是简单的队列，生产者 Console.WriteLine("====RabbitMqPublishDemo===="); for (int i = 0; i < 500; i++) { ZrfRabbitMqHelper.PublishSampleMsg("smapleMsg", $"nihaifengge:{i}"); } Console.WriteLine("生成完毕！"); Console.ReadLine(); } }}/// <summary>/// 简单生产者 逻辑/// </summary>/// <param name="queueName"></param>/// <param name="msg"></param>public static void PublishSampleMsg(string queueName, string msg){ using (IConnection conn = connectionFactory.CreateConnection()) { using (IModel channel = conn.CreateModel()) { channel.QueueDeclare(queue: queueName, durable: false, exclusive: false, autoDelete: false, arguments: null); var msgBody = Encoding.UTF8.GetBytes(msg); channel.BasicPublish(exchange: "", routingKey: queueName, basicProperties: null, body: msgBody); } }}//简单消费端using System;namespace RabbitMqConsumerDemo{ using MyRabbitMqService; using System.Runtime.InteropServices; class Program { static void Main(string[] args) { Console.WriteLine("====RabbitMqConsumerDemo===="); ZrfRabbitMqHelper.ConsumeSampleMsg("smapleMsg", isBasicNack: true, handleMsgStr: handleMsgStr => { Console.WriteLine($"订阅到消息:{DateTime.Now}:{handleMsgStr}"); }); Console.ReadLine(); } }} #region 简单生产者后端逻辑 /// <summary> /// 简单消费者 /// </summary> /// <param name="queueName">队列名称</param> /// <param name="isBasicNack">失败后是否自动放到队列</param> /// <param name="handleMsgStr">有就自己对字符串的处理,如果要存储到数据库请自行扩展</param> public static void ConsumeSampleMsg(string queueName, bool isBasicNack = false, Action<string> handleMsgStr = null)// bool ifBasicReject = false, { Console.WriteLine("ConsumeSampleMsg Waiting for messages...."); IConnection conn = connectionFactory.CreateConnection(); IModel channel = conn.CreateModel(); channel.QueueDeclare(queue: queueName, durable: false, exclusive: false, autoDelete: false, arguments: null); var consumer = new EventingBasicConsumer(channel); consumer.Received += (sender, ea) => { byte[] bymsg = ea.Body.ToArray(); string msg = Encoding.UTF8.GetString(bymsg); if (handleMsgStr != null) { handleMsgStr.Invoke(msg); } else { Console.WriteLine($"{DateTime.Now}->收到消息:{msg}"); } }; channel.BasicConsume(queueName, autoAck: true, consumer); } #endregion

7：Work模式

//简单生产端 ui调用者using System;namespace RabbitMqPublishDemo{ using MyRabbitMqService; using System.Runtime.CompilerServices; class Program { static void Main(string[] args) { //就是简单的队列，生产者 Console.WriteLine("====RabbitMqPublishDemo===="); for (int i = 0; i < 500; i++) { ZrfRabbitMqHelper.PublishSampleMsg("smapleMsg", $"nihaifengge:{i}"); } Console.WriteLine("生成完毕！"); Console.ReadLine(); } }}/// <summary>/// 简单生产者 逻辑/// </summary>/// <param name="queueName"></param>/// <param name="msg"></param>public static void PublishSampleMsg(string queueName, string msg){ using (IConnection conn = connectionFactory.CreateConnection()) { using (IModel channel = conn.CreateModel()) { channel.QueueDeclare(queue: queueName, durable: false, exclusive: false, autoDelete: false, arguments: null); var msgBody = Encoding.UTF8.GetBytes(msg); channel.BasicPublish(exchange: "", routingKey: queueName, basicProperties: null, body: msgBody); } }}//简单消费端using System;namespace RabbitMqConsumerDemo{ using MyRabbitMqService; using System.Runtime.InteropServices; class Program { static void Main(string[] args) { Console.WriteLine("====RabbitMqConsumerDemo===="); ZrfRabbitMqHelper.ConsumeSampleMsg("smapleMsg", isBasicNack: true, handleMsgStr: handleMsgStr => { Console.WriteLine($"订阅到消息:{DateTime.Now}:{handleMsgStr}"); }); Console.ReadLine(); } }} #region 简单生产者后端逻辑 /// <summary> /// 简单消费者 /// </summary> /// <param name="queueName">队列名称</param> /// <param name="isBasicNack">失败后是否自动放到队列</param> /// <param name="handleMsgStr">有就自己对字符串的处理,如果要存储到数据库请自行扩展</param> public static void ConsumeSampleMsg(string queueName, bool isBasicNack = false, Action<string> handleMsgStr = null)// bool ifBasicReject = false, { Console.WriteLine("ConsumeSampleMsg Waiting for messages...."); IConnection conn = connectionFactory.CreateConnection(); IModel channel = conn.CreateModel(); channel.QueueDeclare(queue: queueName, durable: false, exclusive: false, autoDelete: false, arguments: null); var consumer = new EventingBasicConsumer(channel); consumer.Received += (sender, ea) => { byte[] bymsg = ea.Body.ToArray(); string msg = Encoding.UTF8.GetString(bymsg); if (handleMsgStr != null) { handleMsgStr.Invoke(msg); } else { Console.WriteLine($"{DateTime.Now}->收到消息:{msg}"); } }; channel.BasicConsume(queueName, autoAck: true, consumer); } #endregion

8：Fanout

Code:

//就如下的code, 多次生产，3个消费者都可以自动开始消费//生产者using System;namespace RabbitMqPublishDemo{ using MyRabbitMqService; using System.Runtime.CompilerServices; class Program { static void Main(string[] args) { for (int i = 0; i < 500; i++) { ZrfRabbitMqHelper.PublishWorkQueueModel("workqueue", $" :发布消息成功{i}"); } Console.WriteLine("工作队列模式 生成完毕......！"); Console.ReadLine(); } }}//生产者后端逻辑public static void PublishWorkQueueModel(string queueName, string msg) { using (var connection = connectionFactory.CreateConnection()) using (var channel = connection.CreateModel()) { channel.QueueDeclare(queue: queueName, durable: true, exclusive: false, autoDelete: false, arguments: null); var body = Encoding.UTF8.GetBytes(msg); var properties = channel.CreateBasicProperties(); properties.Persistent = true; channel.BasicPublish(exchange: "", routingKey: queueName, basicProperties: properties, body: body); Console.WriteLine($"{DateTime.Now},SentMsg: {msg}"); } }//work消费端using System;namespace RabbitMqConsumerDemo{ using MyRabbitMqService; using System.Runtime.InteropServices; class Program { static void Main(string[] args) { Console.WriteLine("====Work模式开启了===="); ZrfRabbitMqHelper.ConsumeWorkQueueModel("workqueue", handserMsg: msg => { Console.WriteLine($"work模式获取到消息{msg}"); }); Console.ReadLine(); } }}//work后端逻辑 public static void ConsumeWorkQueueModel(string queueName, int sleepHmao = 90, Action<string> handserMsg = null) { var connection = connectionFactory.CreateConnection(); var channel = connection.CreateModel(); channel.QueueDeclare(queue: queueName, durable: true, exclusive: false, autoDelete: false, arguments: null); channel.BasicQos(prefetchSize: 0, prefetchCount: 1, global: false); var consumer = new EventingBasicConsumer(channel); Console.WriteLine(" ConsumeWorkQueueModel Waiting for messages...."); consumer.Received += (sender, ea) => { var body = ea.Body.ToArray(); var message = Encoding.UTF8.GetString(body); if (handserMsg != null) { if (!string.IsNullOrEmpty(message)) { handserMsg.Invoke(message); } } channel.BasicAck(deliveryTag: ea.DeliveryTag, multiple: false); }; channel.BasicConsume(queue: queueName, autoAck: false, consumer: consumer); }

9：Direct

Code:

//同一个消息会被多个订阅者消费//发布者using System;namespace RabbitMqPublishDemo{ using MyRabbitMqService; using System.Runtime.CompilerServices; class Program { static void Main(string[] args) { #region 发布订阅模式，带上了exchange for (int i = 0; i < 500; i++) { ZrfRabbitMqHelper.PublishExchangeModel("exchangemodel", $"发布的消息是：{i}"); } Console.WriteLine("发布ok！"); #endregion Console.ReadLine(); } }}//发布者的后端逻辑 我在这里选择了扇形: ExchangeType.Fanout public static void PublishExchangeModel(string exchangeName, string message) { using (var connection = connectionFactory.CreateConnection()) using (var channel = connection.CreateModel()) { channel.ExchangeDeclare(exchange: exchangeName, type: ExchangeType.Fanout); var body = Encoding.UTF8.GetBytes(message); channel.BasicPublish(exchange: exchangeName, routingKey: "", basicProperties: null, body: body); Console.WriteLine($" Sent {message}"); } }//订阅者using System;namespace RabbitMqConsumerDemo{ using MyRabbitMqService; using System.Runtime.InteropServices; class Program { static void Main(string[] args) { #region 发布订阅模式 Exchange ZrfRabbitMqHelper.SubscriberExchangeModel("exchangemodel", msg => { Console.WriteLine($"订阅到消息：{msg}"); }); #endregion Console.ReadLine(); } }}//订阅者后端的逻辑 public static void SubscriberExchangeModel(string exchangeName, Action<string> handlerMsg = null) { var connection = connectionFactory.CreateConnection(); var channel = connection.CreateModel(); channel.ExchangeDeclare(exchange: exchangeName, type: ExchangeType.Fanout);//Fanout 扇形分叉 var queueName = channel.QueueDeclare().QueueName; channel.QueueBind(queue: queueName, exchange: exchangeName, routingKey: ""); Console.WriteLine(" Waiting for msg...."); var consumer = new EventingBasicConsumer(channel); consumer.Received += (model, ea) => { var body = ea.Body.ToArray(); var message = Encoding.UTF8.GetString(body); if (handlerMsg != null) { if (!string.IsNullOrEmpty(message)) { handlerMsg.Invoke(message); } } else { Console.WriteLine($"订阅到消息:{message}"); } }; channel.BasicConsume(queue: queueName, autoAck: true, consumer: consumer); }

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