/// <summary>
/// 单体模式返回当前类的实例
/// </summary>
/// <returns></returns>
public static DNTCache GetCacheService()
{
if (instance == null)
{
lock (lockHelper)
{
if (instance == null)
{
instance = CachesFileMonitor.CheckAndRemoveCache(new DNTCache());
}
}
}
return(instance);
}
/// <summary>
/// 通过指定的路径删除缓存中的对象
/// </summary>
/// <param name="xpath">分级对象的路径</param>
/// <param name="writeconfig">是否写入文件</param>
public virtual void RemoveObject(string xpath, bool writeconfig)
{
lock (lockHelper)
{
try
{
if (writeconfig)
{
CachesFileMonitor.UpdateCacheItem(xpath);
}
XmlNode result = objectXmlMap.SelectSingleNode(PrepareXpath(xpath));
//检查路径是否指向一个组或一个被缓存的实例元素
if (result.HasChildNodes)
{
//删除所有对象和子结点的信息
XmlNodeList objects = result.SelectNodes("*[@objectId]");
string objectId = "";
foreach (XmlNode node in objects)
{
objectId = node.Attributes["objectId"].Value;
node.ParentNode.RemoveChild(node);
//删除对象
cs.RemoveObject(objectId);
}
}
else
{
//删除元素结点和相关的对象
string objectId = result.Attributes["objectId"].Value;
result.ParentNode.RemoveChild(result);
cs.RemoveObject(objectId);
}
//检查并移除相应的缓存项
}
catch
{ //如出错误表明当前路径不存在
}
}
}
private static void Timer_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
{
//检查并移除相应的缓存项
instance = CachesFileMonitor.CheckAndRemoveCache(instance);
}
