.Net Redis的秒杀Dome和异步执行

1.先到官网下载Redis部署好 Redis 教程 | 菜鸟教程

2.创建一个上游业务项目（这里用控制台项目了，Framwork4.7.2）

NuGet包下载SerivceStack.Redis

 创建一个RedisMessgaeQueue(Redis连接帮助类)

using ServiceStack.Redis;
using System;

namespace RedisUP
{
    class RedisMessgaeQueue:IDisposable
    {
        private RedisClient redisClient { get; }
        /// <summary>
        /// 构造函数
        /// </summary>
        /// <param name="redisHost"></param>
        public RedisMessgaeQueue(string redisHost)
        {
            redisClient = new RedisClient(redisHost);
        }
        /// <summary>
        /// 入队
        /// </summary>
        /// <param name="QKey"></param>
        /// <param name="QMessgae"></param>
        /// <returns></returns>
        public long EnQueue(string QKey,string QMessgae) {
            //1.编码字符串
            byte[] bytes = System.Text.Encoding.UTF8.GetBytes(QMessgae);
            //2.redis消息队列入队
            long count = redisClient.LPush(QKey, bytes);
            return count;
        }
        /// <summary>
        /// 出队（非阻塞）==拉
        /// </summary>
        /// <param name="QKey"></param>
        /// <returns></returns>
        public string DeQueue(string QKey)
        {
            //1.redis消息出队
            byte[] bytes = redisClient.RPop(QKey);
            string QMessgae = null;
            //2.字节转string
            if (bytes==null)
            {
                Console.WriteLine("队列中数据为空");
            }
            else
            {
                QMessgae = System.Text.Encoding.UTF8.GetString(bytes);
            }
            return QMessgae;
        }
        /// <summary>
        /// 出队（阻塞）==推
        /// </summary>
        /// <param name="QKey"></param>
        /// <param name="timeSpan">阻塞超时时间(根据时间自动解除阻塞)</param>
        /// <returns></returns>
        public string BDeQueue(string QKey,TimeSpan? timeSpan)
        {
            //1.redis消息出队
            string QMessgae = redisClient.BlockingPopItemFromList(QKey, timeSpan);
            return QMessgae;
        }
        /// <summary>
        /// 获取队列数
        /// </summary>
        /// <param name="QKey">队列key</param>
        /// <returns></returns>
        public long GetQueueCount(string QKey)
        {
            //1.获取队列数
            return redisClient.GetListCount(QKey);
        }
        /// <summary>
        /// 关闭redis
        /// </summary>
        public void Dispose() { 
            //1.关闭redis
             redisClient.Dispose();
        }
    }
}

Program

using System;
using System.Threading;

namespace RedisUP
{
    class Program
    {
        static void Main(string[] args)
        {
            using (RedisMessgaeQueue redisClient = new RedisMessgaeQueue("localhost:6379"))
            {
                Console.WriteLine("秒杀上游消息....");

                while (true)
                {
                    string rm_sum=redisClient.BDeQueue("rm_skills", TimeSpan.FromSeconds(60));

                    Console.WriteLine("************************开始秒杀下游业务调用****************************");
                    //消费秒杀上游消息
                    //秒杀业务处理
                    HandlerRequest(rm_sum);
                    Console.WriteLine("************************开始秒杀业务调用完成****************************");
                }

            }
        }
        /// <summary>
        /// 处理请求    
        /// </summary>
        /// <param name="requestCount"></param>
        public static void HandlerRequest(string requestCount)
        {
            Thread.Sleep(20);
            //创建订单
            Console.WriteLine("秒杀订单创建成功");
            //扣减库存
            Console.WriteLine("秒杀订单库存扣减生成");
            //扣减余额
            Console.WriteLine("用户余额扣减成功");
            Console.WriteLine($"处理的请求数：{requestCount}");
        }
    }
}

 3.创建一个下游业务项目（这里用控制台项目了，Framwork4.7.2）

 NuGet包下载SerivceStack.Redis

 创建一个RedisMessgaeQueue(Redis连接帮助类)

using ServiceStack.Redis;
using System;

namespace RedisDown
{
    class RedisMessgaeQueue:IDisposable
    {
        private RedisClient redisClient { get; }
        /// <summary>
        /// 构造函数
        /// </summary>
        /// <param name="redisHost"></param>
        public RedisMessgaeQueue(string redisHost)
        {
            redisClient = new RedisClient(redisHost);
        }
        /// <summary>
        /// 入队
        /// </summary>
        /// <param name="QKey"></param>
        /// <param name="QMessgae"></param>
        /// <returns></returns>
        public long EnQueue(string QKey,string QMessgae) {
            //1.编码字符串
            byte[] bytes = System.Text.Encoding.UTF8.GetBytes(QMessgae);
            //2.redis消息队列入队
            long count = redisClient.LPush(QKey, bytes);
            return count;
        }
        /// <summary>
        /// 出队（非阻塞）==拉
        /// </summary>
        /// <param name="QKey"></param>
        /// <returns></returns>
        public string DeQueue(string QKey)
        {
            //1.redis消息出队
            byte[] bytes = redisClient.RPop(QKey);
            string QMessgae = null;
            //2.字节转string
            if (bytes==null)
            {
                Console.WriteLine("队列中数据为空");
            }
            else
            {
                QMessgae = System.Text.Encoding.UTF8.GetString(bytes);
            }
            return QMessgae;
        }
        /// <summary>
        /// 出队（阻塞）==推
        /// </summary>
        /// <param name="QKey"></param>
        /// <param name="timeSpan">阻塞超时时间(根据时间自动解除阻塞)</param>
        /// <returns></returns>
        public string BDeQueue(string QKey,TimeSpan? timeSpan)
        {
            //1.redis消息出队
            string QMessgae = redisClient.BlockingPopItemFromList(QKey, timeSpan);
            return QMessgae;
        }
        /// <summary>
        /// 获取队列数
        /// </summary>
        /// <param name="QKey">队列key</param>
        /// <returns></returns>
        public long GetQueueCount(string QKey)
        {
            //1.获取队列数
            return redisClient.GetListCount(QKey);
        }
        /// <summary>
        /// 关闭redis
        /// </summary>
        public void Dispose() { 
            //1.关闭redis
             redisClient.Dispose();
        }
    }
}

Program

using System;

namespace RedisDown
{
    class Program
    {
        static void Main(string[] args)
        {
            CreateSkillOrder(5000);
            Console.ReadKey();
        }
        /// <summary>
        /// 秒杀方法
        /// </summary>
        /// <param name="RequestCount">请求的数量</param>
        public static void CreateSkillOrder(int RequestCount) {
            using (RedisMessgaeQueue redisClient = new RedisMessgaeQueue("localhost:6379"))
            {
                int HandlerRequestCounts = 2000;//允许请求的数量
                for (int i = 0; i < RequestCount; i++)
                {
                    long count = redisClient.GetQueueCount("rm_skills");//当前的请求数量为多少

                    if (count > HandlerRequestCounts)//判断当前的请求数量是否大于允许请求的数量
                    {
                        Console.WriteLine("系统繁忙请稍后....");
                    }
                    else
                    {
                        //当前请求数量小于允许请求数量，代表还能请求
                        Console.WriteLine("入队成功");
                        redisClient.EnQueue("rm_skills", i + "Test");
                    }
                }

            }
        }
    }
}

启动下游服务

 ​​

启动上游服务

秒杀服务dome结束

4.异步执行

4.1先创建一个控制台FramWork项目RedisOne（命名随意）>NuGet包下载ServiceStack.Redis>添加RedisMessgaeQueue(Redis连接帮助类)>这个类代码在上面

Program

using System;

namespace RedisOne
{
    class Program
    {
        static void Main(string[] args)
        {
            using (RedisMessgaeQueue redisClient = new RedisMessgaeQueue("localhost:6379"))
            {
                string order_sn = "123456";
                redisClient.EnQueue("Messgar1", order_sn);
                redisClient.EnQueue("Messgar2", order_sn);
                Console.WriteLine("写入成功");
            }
            Console.ReadKey();
        }
    }
}

4.2跟上面一样再创建两个控制台项目分别为Messgae1和Messgae2

4.3两个项目都NuGet包下载ServiceStack.Redis

4.4两个项目都添加RedisMessgaeQueue(Redis连接帮助类)>这个类代码在上面

Messgae1的Program

using System;

namespace Messgae1
{
    class Program
    {
        static void Main(string[] args)
        {
            using (RedisMessgaeQueue redisClient = new RedisMessgaeQueue("localhost:6379"))
            {
                Console.WriteLine("Message1.....");
                while (true)
                {
                    string mesg1 = redisClient.BDeQueue("Messgar1", TimeSpan.FromSeconds(60));
                    if (mesg1!=null)
                    {
                        //消费Message1
                        Console.WriteLine($"消费成功:{mesg1}");
                    }
                    else
                    {
                        Console.WriteLine($"消费失败！");
                    }
                    
                }

            }
        }
    }
}

 Messgae2的Program

using System;

namespace Messgae2
{
    class Program
    {
        static void Main(string[] args)
        {
            using (RedisMessgaeQueue redisClient = new RedisMessgaeQueue("localhost:6379"))
            {
                Console.WriteLine("Message2.....");
                while (true)
                {
                    string mesg2 = redisClient.BDeQueue("Messgar2", TimeSpan.FromSeconds(60));
                    if (mesg2 != null)
                    {
                        //消费Message2
                        Console.WriteLine($"消费成功:{mesg2}");
                    }
                    else
                    {
                        Console.WriteLine($"消费失败！");
                    }

                }

            }
        }
    }
    
}

4.5代码部署完成后分别给项目Messgae1，Messgae2，RedisOne重新生成

4.6生成完后打开Messgae1，Messgae2项目的路径>运行Messgae1.exe，Messgae2.exe

 运行

 4.7开启RedisOne.exe

 完结