.NET Core中RabbitMQ使用死信队列的实现

using RabbitMQ.Client;
using RabbitMQ.Client.Events;
using System;
using System.Collections.Generic;
using System.Text;
 
class Program
{
    static void Main(string[] args)
    {
        var factory = new ConnectionFactory() { HostName = "localhost" };
        using (var connection = factory.CreateConnection())
        {
            using (var channel = connection.CreateModel())
            {
                // 定义死信交换机
                channel.ExchangeDeclare("dead-letter-exchange", ExchangeType.Direct);
 
                // 定义死信队列
                var deadLetterQueueArgs = new Dictionary<string, object>
                {
                    { "x-dead-letter-exchange", "dead-letter-exchange" },
                    { "x-message-ttl", 60000 } // 消息超时时间设置为60秒
                };
                channel.QueueDeclare("dead-letter-queue", true, false, false, deadLetterQueueArgs);
 
                // 定义队列
                var queueName = "my-queue";
                channel.QueueDeclare(queueName, true, false, false, null);
 
                // 将队列绑定到死信交换机上
                channel.QueueBind(queueName, "dead-letter-exchange", "my-routing-key");
 
                // 定义消息消费者
                var consumer = new EventingBasicConsumer(channel);
                consumer.Received += (model, ea) =>
                {
                    var body = ea.Body;
                    var message = Encoding.UTF8.GetString(body.ToArray());
                    Console.WriteLine($"接收到消息：{message}");
                };
                channel.BasicConsume(queueName, true, consumer);
 
                // 发送消息
                var message = "Hello RabbitMQ!";
                var body = Encoding.UTF8.GetBytes(message);
                var properties = channel.CreateBasicProperties();
                properties.Persistent = true;
                properties.Expiration = "5000"; // 消息过期时间设置为5秒
                channel.BasicPublish("", queueName, properties, body);
 
                Console.WriteLine("按任意键退出。");
                Console.ReadKey();
            }
        }
    }
}