企业库5.0——缓存应用

using System; using Microsoft.Practices.EnterpriseLibrary.Caching; using Microsoft.Practices.EnterpriseLibrary.Caching.Expirations;

namespace SpecialSale.Sys.SysCache {   /// <summary>   /// 缓存过期类型枚举   /// </summary>   public enum EnumCacheExpirationType   {     /// <summary>     /// 绝对过期     /// </summary>     AbsoluteTime = 1,     /// <summary>     /// 固定过期     /// </summary>     SlidingTime = 2,     /// <summary>     /// 指定过期格式，以特定的格式来过期     /// </summary>     ExtendedFormatTime=3,     /// <summary>     /// 文件依赖     /// </summary>     FileDependency=4,   }

  public static class CacheHelper   {     //2种建立CacheManager的方式     //ICacheManager cache = EnterpriseLibraryContainer.Current.GetInstance<ICacheManager>();     private static ICacheManager cache = CacheFactory.GetCacheManager();

    /// <summary>     /// 添加缓存     /// </summary>     /// <param name="key">键</param>     /// <param name="value">值</param>     /// <param name="type">缓存过期类型</param>     public static void Add(string key, object value, EnumCacheExpirationType type)     {       switch (type)       {         case EnumCacheExpirationType.AbsoluteTime:           cache.Add(key, value, CacheItemPriority.Normal, new SysCacheItemRefreshAction(), new AbsoluteTime(TimeSpan.FromMinutes(15)));           break;         case EnumCacheExpirationType.SlidingTime:           cache.Add(key, value, CacheItemPriority.Normal, new SysCacheItemRefreshAction(), new SlidingTime(TimeSpan.FromMinutes(15)));           break;         case EnumCacheExpirationType.ExtendedFormatTime:           throw new Exception("暂时不支持 ExtendedFormatTime 过期");           break;         case EnumCacheExpirationType.FileDependency:           throw new Exception("暂时不支持 FileDependency 过期");           break;       }     }

    /// <summary>     /// 获取缓存对象     /// </summary>     /// <param name="key">键</param>     /// <returns></returns>     public static T GetCache<T>(string key) where T:class     {       return cache.GetData(key) as T;     }

    /// <summary>     /// 移除缓存对象     /// </summary>     /// <param name="key">键</param>     public static void RemoveCache(string key)     {       cache.Remove(key);     }   }

  /// <summary>   /// 自定义缓存刷新操作   /// </summary>   [Serializable]   public class SysCacheItemRefreshAction : ICacheItemRefreshAction   {     #region ICacheItemRefreshAction 成员

    /// <summary>     /// 自定义刷新操作     /// </summary>     /// <param name="removedKey">移除的键</param>     /// <param name="expiredValue">过期的值</param>     /// <param name="removalReason">移除理由</param>     void ICacheItemRefreshAction.Refresh(string removedKey, object expiredValue, CacheItemRemovedReason removalReason)     {       if (removalReason == CacheItemRemovedReason.Expired)       {         ICacheManager cache = CacheFactory.GetCacheManager();         cache.Add(removedKey, expiredValue);       }     }     #endregion   } }

 

转载保留：http://blog.csdn.net/xxj_jing/article/details/7905285

 

转载于:https://www.cnblogs.com/xxj-jing/archive/2012/08/24/2890051.html

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