我有一个使用线程运行一系列插件的程序。在此过程中,它将插件的运行时间写入XDocument,以便程序知道自上次插件运行以来已经过去了多长时间。不过,我有一个问题。关于每天一次(在不可预测的时间),当我加载的XDocument我收到以下错误:
[04/01/2013 08:17:10.083] Unexpected end of file has occurred. The following elements are not closed: Database, DatabaseList. Line 4043, position 1.
为什么我的XDocument保存不完整的文件?
我进行了一些跟踪语句,结果发现,在这之前的时间,服务失败,约44插件左运行,这显然导致XDocument关闭而不写入文件的结尾。它写入和读取硬盘上的XML文件,但是它执行内存中XDocument的所有操作,因为我使用Linq对数据执行复杂的操作。
是否有人知道为什么会发生?我如何加载我的XDocument,以便在运行过程中发生什么事情时不会破坏实际的文件?
编辑:下面是利用XDocument
(名为XDoc
)的代码的一个示例:
private void RunPlugin(object oQueuedPlugin)
{
PluginState oPluginState = (PluginState)oQueuedPlugin;
PluginResponse oResponse = new PluginResponse();
XElement xPlugin;
lock (xDoc)
{
xPlugin = GetPluginNode(oPluginState.ClientFusionDatabase.Name, oPluginState.Plugin.Name);
}
if (xPlugin == null)
{
API.Log.Write("ActivityTrace.ShowXMLLog", "XML for " + oPluginState.ClientFusionDatabase.Name + " was null.");
XElement NewPlugin = new XElement("Plugin",
new XAttribute("PluginName", oPluginState.Plugin.Name),
new XAttribute("Running", "true"),
new XAttribute("LastStart", DateTime.Now.ToString()),
new XAttribute("LastSuccess", ""),
new XAttribute("LastExitStatus",""));
lock (xDoc)
{
var Location = from database in xDoc.Root.Elements("Database")
where database.Attribute("DatabaseName").Value == oPluginState.ClientFusionDatabase.Name
select database;
Location.FirstOrDefault().Add(NewPlugin);
xDoc.Save(XmlLogFilePath);
}
oResponse = oPluginState.Plugin.Run(oPluginState.ClientFusionDatabase);
if (oResponse == null)
{
API.Log.Write("ActivityTrace.ShowNullReturnLog", oPluginState.ClientFusionDatabase.Name + "- " + oPluginState.Plugin.Name + " returned null.");
}
lock (xDoc)
{
NewPlugin.Attribute("Running").Value = "false";
NewPlugin.Attribute("LastExitStatus").Value = oResponse.ResponseType.ToString();
if (oResponse.ResponseType == PluginResponseTypes.Success || oResponse.ResponseType == PluginResponseTypes.Warning)
NewPlugin.Attribute("LastSuccess").Value = DateTime.Now.ToString();
xDoc.Save(XmlLogFilePath);
}
API.Log.Write("ActivityTrace.ShowXMLLog","Completed " + oPluginState.ClientFusionDatabase.Name + "- " + oPluginState.Plugin.Name + " with XML " + NewPlugin.ToString());
API.Log.Write(oPluginState.Plugin.Name, "(" + oPluginState.ClientFusionDatabase.Connection.Database + " = " + (oResponse.ResponseType + ") ").PadRight(9) + "EXIT MESSAGE: " + (string.IsNullOrEmpty(oResponse.Message) ? "None" : oResponse.Message));
}
else
{
DateTime dLastRun = (DateTime)xPlugin.Attribute("LastStart");
bool bRunning = (bool)xPlugin.Attribute("Running");
if ((DateTime.Now - dLastRun) > oPluginState.Plugin.Interval && !bRunning)
{
lock (xDoc)
{
xPlugin.Attribute("LastStart").Value = DateTime.Now.ToString();
xPlugin.Attribute("Running").Value = "true";
xDoc.Save(XmlLogFilePath);
}
oResponse = oPluginState.Plugin.Run(oPluginState.ClientFusionDatabase);
lock (xDoc)
{
xPlugin.Attribute("Running").Value = "false";
xPlugin.Attribute("LastExitStatus").Value = oResponse.ResponseType.ToString();
if (oResponse.ResponseType == PluginResponseTypes.Success || oResponse.ResponseType == PluginResponseTypes.Warning)
xPlugin.Attribute("LastSuccess").Value = DateTime.Now.ToString();
xDoc.Save(XmlLogFilePath);
}
API.Log.Write(oPluginState.Plugin.Name, "(" + oPluginState.ClientFusionDatabase.Connection.Database + " = " + (oResponse.ResponseType + ") ").PadRight(9) + "EXIT MESSAGE: " + (string.IsNullOrEmpty(oResponse.Message) ? "None" : oResponse.Message));
}
else if (bRunning)
API.Log.Write(oPluginState.Plugin.Name, "(" + oPluginState.ClientFusionDatabase.Connection.Database + " = " + ("SKIPPED) ").PadRight(9) + "REASON: Plugin already running");
}
oPluginState.Complete = true;
}
的问题是,一个或多个插件的不正确处理错误,从而导致它不返回任何响应并使程序崩溃。
岂不是可以张贴的代码和输入的一些例子吗? –
从你的故事中得知你的服务崩溃了?如果是这样的话,你很难期望所有对象都能正确处理并将其更改写入磁盘。 – Virtlink
我会尝试添加一些。挂在那里。 – ijb109