/// <summary>
/// 获取指定key缓存数据，如果该缓存不存在，则自动调用数据源委托生成缓存(线程安全，但会造成一定性能开销)
/// </summary>
/// <typeparam name="T">缓存数据的类型</typeparam>
/// <param name="key">缓存key</param>
/// <param name="cacheTime">缓存时间</param>
/// <param name="callback">数据源委托</param>
/// <returns></returns>
public static T GetWithLock <T>(string key, CacheTimeOption cacheTime, RefreshCacheDataHandler <T> callback) where T : class
{
// 不缓存时，直接返回
if (cacheTime == CacheTimeOption.None)
{
return(callback());
}
if (Contains(key))
{
return(Get <T>(key));
}
lock (string.Intern(key))
{
if (Contains(key))
{
return(Get <T>(key));
}
else
{
T content = callback();
Set(key, content, cacheTime);
return(content);
}
}
}
/// <summary>
/// 获取指定key缓存数据，如果该缓存不存在，则自动调用数据源委托生成缓存 默认半天12小时
/// </summary>
/// <typeparam name="T">缓存数据的类型</typeparam>
/// <param name="key">缓存key</param>
/// <param name="callback">数据源委托</param>
/// <returns></returns>
public static T Get <T>(string key, RefreshCacheDataHandler <T> callback)
{
if (Contains(key))
{
return(Get <T>(key));
}
T content = callback();
Set(key, content, CacheTimeOption.HalfDay);
return(content);
}
/// <summary>
/// 获取指定key缓存数据，如果该缓存不存在，则自动调用数据源委托生成缓存
/// </summary>
/// <typeparam name="T">缓存数据的类型</typeparam>
/// <param name="key">缓存key</param>
/// <param name="cacheTime">缓存时间</param>
/// <param name="callback">数据源委托</param>
/// <returns></returns>
public static T Get <T>(string key, CacheTimeOption cacheTime, RefreshCacheDataHandler <T> callback)
{
// 不缓存时，直接返回
if (cacheTime == CacheTimeOption.None)
{
return(callback());
}
if (Contains(key))
{
return(Get <T>(key));
}
T content = callback();
Set(key, content, cacheTime);
return(content);
}
