自定义缓存Memcache 以及Cache

*****缓存存储配置项（读缓存和appsetting配直节点的问题 ）*****

MemCache经常用于数据不用经常改动的数据 不用每次都去数据库中读取，可以防止在系统的缓存中，缓存在内存中读取速度快，但是memcache（是可以分布的缓存）没有保存机制，服务器挂掉，memcache丢失

 

系统的配置节放在了appsettings配置节下  <add key=”mingzi” value=”assas” />

ConfigurationManager.appsetting[“mingzi”];获取

 

CacheHelper

 public class CaCheHelper

    {

        /// <summary>

        /// 获取cache

        /// </summary>

        /// <param name="key"></param>

        /// <param name="value"></param>

        public static void set(string key, string value)

        {

            System.Web.Caching.Cache cache = HttpRuntime.Cache;

            cache[key] = value;

        }

        /// <summary>

        /// 设置cache

        /// </summary>

        /// <param name="key"></param>

        /// <returns></returns>

        public static object Get(string key)

        {

            System.Web.Caching.Cache cache = HttpRuntime.Cache;

            return cache[key];

        }

        /// <summary>

        /// 移除cache

        /// </summary>

        /// <param name="key"></param>

        public static void Remove(string key)

        {

            System.Web.Caching.Cache cache = HttpRuntime.Cache;

            cache.Remove(key);

        }

}

 

MemCacheHelper

  private static readonly MemcachedClient mc = null;

        static MemCacheHelper()

        {

            string[] serverlist = { "127.0.0.1:11211" }; //把ip和端口号定义在webConfig

            //初始化池

            SockIOPool pool = SockIOPool.GetInstance();

            pool.SetServers(serverlist);

            pool.InitConnections = 3;

            pool.MinConnections = 3;

            pool.MaxConnections = 5;

            pool.SocketConnectTimeout = 1000;

            pool.SocketTimeout = 3000;

            pool.MaintenanceSleep = 30;

            pool.Failover = true;

            pool.Nagle = false;

            pool.Initialize();

            // 获得客户端实例

            mc = new MemcachedClient();

            mc.EnableCompression = false;

        }

        /// <summary>

        /// 设置

        /// </summary>

        /// <param name="key"></param>

        /// <param name="value"></param>

        public static void Set(string key, object value)

        {

            mc.Set(key, value);

        }

        /// <summary>

        /// 获取缓存

        /// </summary>

        /// <param name="key"></param>

        /// <returns></returns>

        public static object Get(string key)

        {

            return mc.Get(key);

        }

        /// <summary>

        /// 设置缓存并且制定过期时间

        /// </summary>

        /// <param name="key"></param>

        /// <param name="value"></param>

        /// <param name="dt"></param>

        public static void Set(string key, object value, DateTime dt)

        {

            mc.Set(key, value, dt);

        }

        /// <summary>

        /// 删除缓存

        /// </summary>

        /// <param name="key"></param>

        /// <returns></returns>

        public static bool Delete(string key)

        {

            if (mc.KeyExists(key))

            {

                return mc.Delete(key);

            }

            return false;

        }

}

 

 

//读取的时候先进行判断  如果缓存数据中有这个配置节那么就直接返回  如果没有这个配置节那么就从数据库中读取 并且返回  同时把从数据库中读取的数据放入缓存中

  public string GetValue(string key)

        {

            //加上缓存依赖项 在更新数据的时候别忘了remove缓存

            //object obj = Common.CaCheHelper.Get("setting_" + key);//第一次没有所以从数据库中取出

            //if (obj == null)

            //{

            //    var setting = this.DbSession.SettingsDal.LoadEntities(c => c.Name == key).FirstOrDefault();

            //    if (setting != null)

            //    {

            //        Common.CaCheHelper.set("setting_" + key, setting.Value);

            //        //读取出来数据后放入缓存

            //        //返回对应的值

            //        return setting.Value;

            //    }

            //}

            //return obj.ToString();

 

            object o = BookShop.Common.MemCacheHelper.Get("setting_" + key);

            if (o == null)

            {

                var setting = this.DbSession.SettingsDal.LoadEntities(c => c.Name == key).FirstOrDefault();

                if (setting != null)

                {

                    BookShop.Common.MemCacheHelper.Set("setting_" + key, setting.Value);

                    return setting.Value;

                }

            }

            return o.ToString();

转载于:https://www.cnblogs.com/lierjie/p/3833939.html