private static void SaveMetaDataSection(ChoPerformanceCounter pc)
{
string xPath = GetXPath(pc);
ChoPCMetaDataInfo metaDataInfo = pc.MetaDataInfo;
using (ChoXmlDocument xmlDocument = new ChoXmlDocument(MetaDataFilepath, false, false))
{
if (metaDataInfo == null)
{
return;
}
XmlNode node = xmlDocument.XmlDocument.SelectSingleNode(xPath);
if (node == null)
{
node = xmlDocument.XmlDocument.MakeXPath(xPath);
}
if (node != null)
{
ChoXmlDocument.SetOuterXml(node, metaDataInfo.ToXml());
xmlDocument.Save();
}
}
}
public static ChoPCMetaDataInfo GetMetaDataSection(ChoPerformanceCounter pc)
{
if (pc == null)
{
return(null);
}
string xPath = GetXPath(pc);
XmlNode node = null;
if (_rootNode != null)
{
node = _rootNode.SelectSingleNode(xPath);
}
if (node != null)
{
XmlAttributeOverrides overrides = new XmlAttributeOverrides();
XmlAttributes attr = new XmlAttributes();
attr.XmlRoot = new XmlRootAttribute(node.Name);
overrides.Add(typeof(ChoPCMetaDataInfo), attr);
ChoPCMetaDataInfo metaDataInfo = node.ToObject(typeof(ChoPCMetaDataInfo), overrides) as ChoPCMetaDataInfo;
return(metaDataInfo);
}
else
{
return(null);
}
}
private static string GetXPath(ChoPerformanceCounter pc)
{
if (pc.InstanceName.IsNullOrEmpty())
{
return("//PerformanceCounterCategory[@name='{0}']/PerformanceCounter[@name='{1}']".FormatString(pc.CategoryName, pc.CounterName));
}
else
{
return("//PerformanceCounterCategory[@name='{0}']/PerformanceCounter[@name='{1}' and @instanceName='{2}']".FormatString(pc.CategoryName, pc.CounterName, pc.InstanceName));
}
}
public static bool IsMetaDataModified(ChoPerformanceCounter pc)
{
if (pc == null)
{
return(false);
}
ChoPCMetaDataInfo newConfigurationMetaDataInfo = GetMetaDataSection(pc);
return(!ChoObject.Equals <ChoPCMetaDataInfo>(newConfigurationMetaDataInfo, pc.MetaDataInfo));
}
public static void SetMetaDataSection(ChoPerformanceCounter pc)
{
if (pc == null)
{
return;
}
if (ChoObject.Equals <ChoPCMetaDataInfo>(pc.MetaDataInfo, GetMetaDataSection(pc)))
{
return;
}
SaveMetaDataSection(pc);
}
public static ChoPCMetaDataInfo GetMetaDataSectionNSaveIfEmpty(ChoPerformanceCounter pc)
{
ChoPCMetaDataInfo metaData = GetMetaDataSection(pc);
if (metaData == null)
{
SaveMetaDataSection(pc);
return(pc.MetaDataInfo);
}
else
{
return(metaData);
}
}
public static void SetWatcher(ChoPerformanceCounter pc)
{
if (pc == null)
{
return;
}
Initialize();
ConfigurationChangeWatcher.SetConfigurationChangedEventHandler("{0}_PCMetaData_WatcherHandler".FormatString("{0}/{1}/{2}".FormatString(pc.CategoryName, pc.CounterName, pc.InstanceName)),
(sender, e) =>
{
if (ChoPCMetaDataManager.IsMetaDataModified(pc))
{
pc.RefreshMetaData(GetMetaDataSectionNSaveIfEmpty(pc));
}
});
pc.RefreshMetaData(GetMetaDataSection(pc));
}