IEnumerable <string> ReadAppState()
{
var appstatePath = HostingEnvironment.MapPath(AppStateData);
List <string> list = _cacheStrategy.RetrieveObject <List <string> >(appstatePath);
if (list == null)
{
list = new List <string>();
if (File.Exists(appstatePath))
{
var content = File.ReadAllText(appstatePath, Encoding.UTF8);
if (!string.IsNullOrEmpty(content))
{
list.AddRange(content.Split(','));
}
}
else
{
WriteAppState(null);
}
_cacheStrategy.AddObjectWithFileChange(appstatePath, list, onRemove, appstatePath);
}
return(list);
}
public void AddObject(string objectId, object o, string file)
{
lock (lockHelper)
{
cachedStrategy.AddObjectWithFileChange(objectId, o, file);
}
}
/// <summary>
/// 在XML映射文档中的指定路径,加入当前对象信息
/// </summary>
/// <param name="xpath">分级对象的路径 </param>
/// <param name="o">被缓存的对象</param>
public virtual void AddObject(string xpath, object o, string[] files)
{
xpath = xpath.Replace(" ", "_SPACE_"); //如果xpath中出现空格，则将空格替换为_SPACE_
lock (lockHelper)
{
//当缓存到期时间为0或负值,则不再放入缓存
if (cs.TimeOut <= 0)
{
return;
}
//整理XPATH表达式信息
string newXpath = PrepareXpath(xpath);
int separator = newXpath.LastIndexOf("/");
//找到相关的组名
string group = newXpath.Substring(0, separator);
//找到相关的对象
string element = newXpath.Substring(separator + 1);
XmlNode groupNode = objectXmlMap.SelectSingleNode(group);
//建立对象的唯一键值, 用以映射XML和缓存对象的键
string objectId = "";
XmlNode node = objectXmlMap.SelectSingleNode(PrepareXpath(xpath));
if (node != null)
{
objectId = node.Attributes["objectId"].Value;
}
if (objectId == "")
{
groupNode = CreateNode(group);
objectId = Guid.NewGuid().ToString();
//建立新元素和一个属性 for this perticular object
XmlElement objectElement = objectXmlMap.OwnerDocument.CreateElement(element);
XmlAttribute objectAttribute = objectXmlMap.OwnerDocument.CreateAttribute("objectId");
objectAttribute.Value = objectId;
objectElement.Attributes.Append(objectAttribute);
//为XML文档建立新元素
groupNode.AppendChild(objectElement);
}
else
{
//建立新元素和一个属性 for this perticular object
XmlElement objectElement = objectXmlMap.OwnerDocument.CreateElement(element);
XmlAttribute objectAttribute = objectXmlMap.OwnerDocument.CreateAttribute("objectId");
objectAttribute.Value = objectId;
objectElement.Attributes.Append(objectAttribute);
//为XML文档建立新元素
groupNode.ReplaceChild(objectElement, node);
}
//向缓存加入新的对象
cs.AddObjectWithFileChange(objectId, o, files);
}
}
