/// <summary>
/// 移除 Key,同时移除从 <c>_indexSet</c> 索引中移除
/// </summary>
/// <param name="key"></param>
/// <returns></returns>
protected bool RemoveKey(TKey key)
{
var setKey = GetEntryKey(key);
_indexSet.Remove(key);
return(Database.KeyDelete(setKey));
}
/// <summary>
/// 检查过去 Set 是否存在,如果不存在,则清除 过期索引
/// </summary>
/// <param name="key"></param>
/// <returns></returns>
private bool CheckExpired(TKey key)
{
if (!_expireIndexSet.Contains(key))
{
return(false);
}
var setKey = GetEntryKey(key);
var setExiste = Database.KeyExists(setKey);
if (!setExiste)
{
_expireIndexSet.Remove(key);
}
return(setExiste);
}