(精华)2020年10月18日 高可用高并发 缓存的使用(Redis)

首先按装如下包

Microsoft.Extensions.Caching.Redis

配置

public class Startup
    {
        public Startup(IConfiguration configuration)
        {
            Configuration = configuration;
        }

        public IConfiguration Configuration { get; }

        public void ConfigureServices(IServiceCollection services)
        {
            services.AddControllers();
            services.AddDistributedRedisCache(options =>
            {
                options.Configuration = "localhost";//地址
                options.InstanceName = "Sample";//实例名称
            });
        }

        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }

            app.UseRouting();

            app.UseAuthorization();

            app.UseEndpoints(endpoints =>
            {
                endpoints.MapControllers();
            });
        }
    }

使用

[Route("api/[controller]")]
    [ApiController]
    public class Sample01Controller : ControllerBase
    {
        private readonly IDistributedCache _cache;

        public Sample01Controller(IDistributedCache distributedCache)
        {
            _cache = distributedCache;
        }

        public async Task<IActionResult> Get()
        {
            var cacheTime = await _cache.GetStringAsync("CacheTime");
            if (cacheTime == null)
            {
                cacheTime = DateTime.Now.ToString("yyyy-MM-dd hh:mm:ss");
                await _cache.SetAsync("CacheTime", Encoding.UTF8.GetBytes(cacheTime));
            }

            return Ok(new
            {
                cacheTime,
                currentTime = DateTime.Now.ToString("yyyy-MM-dd hh:mm:ss")
            });
        }
    }

[Route("api/[controller]")]
    [ApiController]
    public class Sample02Controller : ControllerBase
    {
        private readonly IDistributedCache _cache;

        public Sample02Controller(IDistributedCache distributedCache)
        {
            _cache = distributedCache;
        }

        public async Task<IActionResult> Get()
        {
            var cacheTime = await _cache.GetStringAsync("CacheTime");
            if (cacheTime == null)
            {
                cacheTime = DateTime.Now.ToString("yyyy-MM-dd hh:mm:ss");
                var cacheEntryOptions = new DistributedCacheEntryOptions()
                    .SetSlidingExpiration(TimeSpan.FromSeconds(10))
                    .SetAbsoluteExpiration(TimeSpan.FromSeconds(20));

                await _cache.SetAsync("CacheTime", Encoding.UTF8.GetBytes(cacheTime), cacheEntryOptions);
            }

            return Ok(new
            {
                cacheTime,
                currentTime = DateTime.Now.ToString("yyyy-MM-dd hh:mm:ss")
            });
        }
    }

文章来源: codeboy.blog.csdn.net，作者：愚公搬代码，版权归原作者所有，如需转载，请联系作者。

原文链接：codeboy.blog.csdn.net/article/details/109150974