分布式缓存NCache使用

NCache作为缓存优点币Redis有优势，但是收费的所以选用的不多吧。下面简单实操一下：

首先官网下载组件NCache Download Center (alachisoft.com)，这里选择企业和专业版都可以，都只有一个月试用期，下一步后统一协议，后弹出第二个界面需要填写一下注册信息。重点是workemail，这里需要工作邮箱，后缀是qq，163的都不行。我用的是zoho的邮箱。

 

下载完毕后需要通过cmd管理员命令去安装msi的文件，因为msi不能通过右键管理员来执行，二这个必须要管理员权限（有疑问 搜索管理员身份运行msi安装），安装过程中需要安装key，注册的邮箱里面有这个。

安装完后会有这几个出现在开始菜单，只需要打开NCache Web Manager,可以打开localhost:8251的管理界面。Cache Name和Servers需要在代码和配置文件中做好配置。

 

 

下面新建netcore6 webapi程序，导入NCache的包会自动生成：client.ncconf和config.ncconf两个配置文件，重点修改client.ncconf文件的两处服务ip，还有代码

configuration.CacheName = "ClusteredCache"; 指定CacheName名称为上图的Cache Name。

using Alachisoft.NCache.Caching.Distributed;using Microsoft.Extensions.Caching.Distributed;using Microsoft.Extensions.Caching.SqlServer;using Microsoft.Extensions.Caching.StackExchangeRedis;var builder = WebApplication.CreateBuilder(args);builder.Services.AddRazorPages();builder.Services.AddNCacheDistributedCache(configuration =>{    configuration.CacheName = "ClusteredCache";    configuration.EnableLogs = true;    configuration.ExceptionsEnabled = true;});var app = builder.Build();#region snippet_Configureapp.Lifetime.ApplicationStarted.Register(() =>{    var currentTimeUTC = DateTime.UtcNow.ToString();    byte[] encodedCurrentTimeUTC = System.Text.Encoding.UTF8.GetBytes(currentTimeUTC);    var options = new DistributedCacheEntryOptions()        .SetSlidingExpiration(TimeSpan.FromSeconds(20));    app.Services.GetService<IDistributedCache>()                              .Set("cachedTimeUTC", encodedCurrentTimeUTC, options);});#endregionif (!app.Environment.IsDevelopment()){    app.UseExceptionHandler("/Error");    app.UseHsts();}app.UseHttpsRedirection();app.UseStaticFiles();app.UseRouting();app.UseAuthorization();app.MapRazorPages();app.Run();

 

using Microsoft.AspNetCore.Mvc;using Microsoft.AspNetCore.Mvc.RazorPages;using Microsoft.Extensions.Caching.Distributed;using System.Text;namespace SampleApp.Pages{    #region snippet_IndexModel    public class IndexModel : PageModel    {        private readonly IDistributedCache _cache;        public IndexModel(IDistributedCache cache)        {            _cache = cache;        }        public string? CachedTimeUTC { get; set; }        public string? ASP_Environment { get; set; }        public async Task OnGetAsync()        {            CachedTimeUTC = "Cached Time Expired";            var encodedCachedTimeUTC = await _cache.GetAsync("cachedTimeUTC");            if (encodedCachedTimeUTC != null)            {                CachedTimeUTC = Encoding.UTF8.GetString(encodedCachedTimeUTC);            }            ASP_Environment = Environment.GetEnvironmentVariable("ASPNETCORE_ENVIRONMENT");            if (String.IsNullOrEmpty(ASP_Environment))            {                ASP_Environment = "Null, so Production";            }        }        public async Task<IActionResult> OnPostResetCachedTime()        {            var currentTimeUTC = DateTime.UtcNow.ToString();            byte[] encodedCurrentTimeUTC = Encoding.UTF8.GetBytes(currentTimeUTC);            var options = new DistributedCacheEntryOptions()                .SetSlidingExpiration(TimeSpan.FromSeconds(20));            await _cache.SetAsync("cachedTimeUTC", encodedCurrentTimeUTC, options);            return RedirectToPage();        }    }    #endregion}

运行效果图如下：

示例代码：

exercise/NCacheDistCache at master · liuzhixin405/exercise (github.com)

参考来源：

ASP.NET Core 中的分布式缓存 | Microsoft Docs