企业库5.0——缓存应用

水深无声 2024-02-18 17:40 54阅读 0赞

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][http_blog.csdn.net_xxj_jing_article_details_7905285]

[http_blog.csdn.net_xxj_jing_article_details_7905285]: http://blog.csdn.net/xxj_jing/article/details/7905285