/// <summary>
/// Parse W3C trace context headers to ActivityContext object.
/// </summary>
/// <param name="traceParent">W3C trace parent header.</param>
/// <param name="traceState">W3C trace state.</param>
/// <param name="context">The ActivityContext object created from the parsing operation.</param>
public static bool TryParse(string traceParent, string?traceState, out ActivityContext context)
{
if (traceParent == null)
{
throw new ArgumentNullException(nameof(traceParent));
}
return(Activity.TryConvertIdToContext(traceParent, traceState, out context));
}
/// <summary>
/// Parse W3C trace context headers to ActivityContext object.
/// </summary>
/// <param name="traceParent">W3C trace parent header.</param>
/// <param name="traceState">W3C trace state.</param>
/// <param name="context">The ActivityContext object created from the parsing operation.</param>
public static bool TryParse(string?traceParent, string?traceState, out ActivityContext context)
{
if (traceParent is null)
{
context = default;
return(false);
}
return(Activity.TryConvertIdToContext(traceParent, traceState, out context));
}
/// <summary>
/// Parse W3C trace context headers to ActivityContext object.
/// </summary>
/// <param name="traceParent">W3C trace parent header.</param>
/// <param name="traceState">Trace state.</param>
/// <returns>
/// The ActivityContext object created from the parsing operation.
/// </returns>
public static ActivityContext Parse(string traceParent, string?traceState)
{
if (traceParent is null)
{
throw new ArgumentNullException(nameof(traceParent));
}
if (!Activity.TryConvertIdToContext(traceParent, traceState, out ActivityContext context))
{
throw new ArgumentException(SR.InvalidTraceParent);
}
return(context);
}
private static void GetRootId(out string?parentId, out string?traceState, out bool isW3c, out IEnumerable <KeyValuePair <string, string?> >?baggage)
{
Activity?activity = Activity.Current;
while (activity?.Parent is Activity parent)
{
activity = parent;
}
traceState = activity?.TraceStateString;
parentId = activity?.ParentId ?? activity?.Id;
isW3c = parentId is not null?Activity.TryConvertIdToContext(parentId, traceState, isRemote : false, out _) : false;
baggage = activity?.Baggage;
}
private Activity?StartActivity(string name, ActivityKind kind, ActivityContext context, string?parentId, IEnumerable <KeyValuePair <string, object?> >?tags, IEnumerable <ActivityLink>?links, DateTimeOffset startTime)
{
// _listeners can get assigned to null in Dispose.
SynchronizedList <ActivityListener>?listeners = _listeners;
if (listeners == null || listeners.Count == 0)
{
return(null);
}
Activity?activity = null;
ActivityDataRequest dataRequest = ActivityDataRequest.None;
bool?useContext = default;
ActivityCreationOptions <ActivityContext> optionsWithContext = default;
if (parentId != null)
{
var aco = new ActivityCreationOptions <string>(this, name, parentId, kind, tags, links);
listeners.EnumWithFunc((ActivityListener listener, ref ActivityCreationOptions <string> data, ref ActivityDataRequest request, ref bool?canUseContext, ref ActivityCreationOptions <ActivityContext> dataWithContext) => {
GetRequestedData <string>?getRequestedDataUsingParentId = listener.GetRequestedDataUsingParentId;
if (getRequestedDataUsingParentId != null)
{
ActivityDataRequest dr = getRequestedDataUsingParentId(ref data);
if (dr > request)
{
request = dr;
}
// Stop the enumeration if we get the max value RecordingAndSampling.
return(request != ActivityDataRequest.AllDataAndRecorded);
}
else
{
// In case we have a parent Id and the listener not providing the GetRequestedDataUsingParentId, we'll try to find out if the following conditions are true:
// - The listener is providing the GetRequestedDataUsingContext callback
// - Can convert the parent Id to a Context
// Then we can call the listener GetRequestedDataUsingContext callback with the constructed context.
GetRequestedData <ActivityContext>?getRequestedDataUsingContext = listener.GetRequestedDataUsingContext;
if (getRequestedDataUsingContext != null)
{
if (!canUseContext.HasValue)
{
canUseContext = Activity.TryConvertIdToContext(parentId, out ActivityContext ctx);
if (canUseContext.Value)
{
dataWithContext = new ActivityCreationOptions <ActivityContext>(data.Source, data.Name, ctx, data.Kind, data.Tags, data.Links);
}
}
if (canUseContext.Value)
{
ActivityDataRequest dr = getRequestedDataUsingContext(ref dataWithContext);
if (dr > request)
{
request = dr;
}
// Stop the enumeration if we get the max value RecordingAndSampling.
return(request != ActivityDataRequest.AllDataAndRecorded);
}
}
}
return(true);
}, ref aco, ref dataRequest, ref useContext, ref optionsWithContext);
}
else
{
ActivityContext initializedContext = context == default && Activity.Current != null ? Activity.Current.Context : context;
optionsWithContext = new ActivityCreationOptions <ActivityContext>(this, name, initializedContext, kind, tags, links);
listeners.EnumWithFunc((ActivityListener listener, ref ActivityCreationOptions <ActivityContext> data, ref ActivityDataRequest request, ref bool?canUseContext, ref ActivityCreationOptions <ActivityContext> dataWithContext) => {
GetRequestedData <ActivityContext>?getRequestedDataUsingContext = listener.GetRequestedDataUsingContext;
if (getRequestedDataUsingContext != null)
{
if (listener.AutoGenerateRootContextTraceId && !canUseContext.HasValue && data.Parent == default)
{
ActivityContext ctx = new ActivityContext(ActivityTraceId.CreateRandom(), default, default);