/// <summary>
/// 在Cache中读取Cache项，如果不存在，则调用action
/// </summary>
/// <param name="key">键值</param>
/// <param name="action">不存在时的回调</param>
/// <returns>Cache项的值</returns>
public TValue GetOrAddNewValue(TKey key, CacheItemNotExistsAction action)
{
TValue result = default(TValue);
if (TryGetValue(key, out result) == false)
{
lock (this.syncRoot)
{
if (TryGetValue(key, out result) == false)
{
result = action(this, key);
}
}
}
return(result);
}
/// <summary>
/// 在Cache中读取Cache项，如果不存在，则调用action
/// </summary>
/// <param name="key">键值</param>
/// <param name="action">不存在时的回调</param>
/// <returns>Cache项的值</returns>
public TValue GetOrAddNewValue(TKey key, CacheItemNotExistsAction action)
{
key = ConvertCacheKey(key);
TValue result;
if (this.InnerTryGetValue(key, out result) == false)
{
lock (this.syncRoot)
{
if (this.InnerTryGetValue(key, out result) == false)
{
result = action(this, key);
}
}
}
return(result);
}
