/// <summary>
/// 获取缓存中指定缓存键的对象。
/// </summary>
/// <param name="cacheKey">用于引用对象的缓存键。</param>
/// <returns>检索到的缓存对象，未找到时为 null。</returns>
/// <exception cref="NotSupportedException">不支持该方法。</exception>
public object Get(string cacheKey)
{
if (cacheDictionary.TryGetValue(cacheKey, out CacheItem entry))
{
if (optimizer.Update(entry) == null)
{
if (cacheDictionary.TryRemove(cacheKey, out entry))
{
NotifyCacheRemoved(entry);
return(null);
}
}
return(entry.Value);
}
return(null);
}
/// <summary>
/// 更新缓存项。
/// </summary>
/// <param name="cache"></param>
/// <param name="checkExpired"></param>
/// <returns></returns>
internal static CacheItem UpdateEntry(CacheItem cache, bool checkExpired = true)
{
return(_optimizer.Update(cache, checkExpired));
}
