public static void Pop(ILoggingContext context)
{
var frameID = GetFrameID(context);
var frame = new LoggingCallContextStackFrame(frameID);
if (!frame.Deactivate())
{
return;
}
using (var keySet = Keys().GetEditor())
{
foreach (var key in frame.Keys)
{
var activeFrameData = new LoggingCallContextActiveFrameData(key);
LoggingCallContextStackFrame currentFrame;
while (activeFrameData.TryGetFrame(out currentFrame) &&
!currentFrame.IsActive())
{
currentFrame.FreeKey(key);
if (!activeFrameData.Pop())
{
keySet.Remove(key);
break;
}
}
}
CallContext.LogicalSetData(SERIALIZATION_KEY, SerializeToXML(keySet.DataStore()));
}
}
/// <summary>
/// Enumerate the keys stored in the context and
/// serialize them to an XML blob
/// </summary>
private static string SerializeToXML(IEnumerable <string> keyCollection)
{
var sb = new StringBuilder();
using (var tw = new StringWriter(sb))
using (var xw = new XmlTextWriter(tw))
{
xw.WriteStartElement("loggingContext");
foreach (var key in keyCollection)
{
var frameData = new LoggingCallContextActiveFrameData(key);
object data;
xw.WriteStartElement(key);
if (frameData.TryGetValue(out data) && data != null)
{
xw.WriteString(data.ToString());
}
else
{
xw.WriteString("(Unknown)");
}
xw.WriteEndElement();
}
xw.WriteEndElement();
}
return(sb.ToString());
}
public static ILoggingContext Push(IEnumerable <KeyValuePair <string, object> > data)
{
var context = new LoggingContext();
var frame = LoggingCallContextStackFrame.Initialize(context, data);
using (var keySet = Keys().GetEditor())
{
foreach (var key in frame.Keys)
{
LoggingCallContextActiveFrameData.Initialize(frame, key);
keySet.Add(key);
}
CallContext.LogicalSetData(SERIALIZATION_KEY, SerializeToXML(keySet.DataStore()));
}
return(context);
}
/// <summary>
/// Retrieves the current active value for the key
/// </summary>
public static bool TryGetContextData(string key, out object result)
{
LoggingCallContextActiveFrameData data = new LoggingCallContextActiveFrameData(key);
return(data.TryGetValue(out result));
}
