public class DictionaryCacheManager<TK,TV>
{ private Dictionary<TK, TV> cacheDic = new Dictionary<TK,TV>();
private Dictionary<TK, object> lockDic = new Dictionary<TK, object>();
public TV Get(TK key,Func<TV> getValue)
{
if(!CheckKey(key))
{
CheckLock(key);
}
if(!CheckKey(key))
{
lock(lockDic[key])
{
if(!CheckKey(key)||cacheDic[key]==null)
{
cacheDic[key] = getValue();
}
}
}
return cacheDic[key];
}
private object _lock = new object();
private void CheckLock(TK key)
{
lock(_lock)
{
if(!lockDic.ContainsKey(key))
{
lockDic.Add(key, new object());
}
}
}
private bool CheckKey(TK key)
{
return cacheDic.ContainsKey(key);
}
public void Clear()
{
lock(_lock)
{
lockDic.Clear();
cacheDic.Clear();
}
}
public void Clear(TK key)
{
lock(lockDic[key])
{
cacheDic.Remove(key);
}
}
} |
很简单
本文转自today4king博客园博客，原文链接：http://www.cnblogs.com/jinzhao/archive/2012/04/20/2460652.html，如需转载请自行联系原作者