private Span(
string name,
SpanContext parentSpanContext,
ActivityAndTracestate activityAndTracestate,
bool ownsActivity,
SpanKind spanKind,
SpanCreationOptions spanCreationOptions,
TracerConfiguration tracerConfiguration,
SpanProcessor spanProcessor,
Resource libraryResource)
{
this.Name = name;
this.LibraryResource = libraryResource;
IEnumerable <Link> links = null;
if (spanCreationOptions != null)
{
links = spanCreationOptions.Links ?? spanCreationOptions.LinksFactory?.Invoke();
this.startTimestamp = spanCreationOptions.StartTimestamp;
}
if (this.startTimestamp == default)
{
this.startTimestamp = PreciseTimestamp.GetUtcNow();
}
this.tracerConfiguration = tracerConfiguration;
this.spanProcessor = spanProcessor;
this.Kind = spanKind;
this.OwnsActivity = ownsActivity;
this.Activity = activityAndTracestate.Activity;
var tracestate = activityAndTracestate.Tracestate;
this.IsRecording = MakeSamplingDecision(
parentSpanContext,
name,
null,
links, // we'll enumerate again, but double enumeration over small collection is cheaper than allocation
this.Activity.TraceId,
this.Activity.SpanId,
this.tracerConfiguration);
if (this.IsRecording)
{
this.Activity.ActivityTraceFlags |= ActivityTraceFlags.Recorded;
this.SetLinks(links);
this.spanProcessor.OnStart(this);
}
else
{
this.Activity.ActivityTraceFlags &= ~ActivityTraceFlags.Recorded;
}
// this context is definitely not remote, setting isRemote to false
this.Context = new SpanContext(this.Activity.TraceId, this.Activity.SpanId, this.Activity.ActivityTraceFlags, false, tracestate);
}
/// <inheritdoc/>
public ISpan Start()
{
TelemetrySpan span = null;
SpanCreationOptions options = null;
if (this.explicitStartTime != null || this.links != null)
{
options = new SpanCreationOptions
{
StartTimestamp = this.explicitStartTime ?? default,
Links = this.links,
};
}
// If specified, this takes precedence.
if (this.ignoreActiveSpan)
{
span = this.tracer.StartRootSpan(this.spanName, this.spanKind, options);
}
else if (this.parentSpan != null)
{
span = this.tracer.StartSpan(this.spanName, this.parentSpan, this.spanKind, options);
}
else if (this.parentSpanContext.IsValid)
{
span = this.tracer.StartSpan(this.spanName, this.parentSpanContext, this.spanKind, options);
}
else if (this.parentSpan == null && !this.parentSpanContext.IsValid && (this.tracer.CurrentSpan == null || !this.tracer.CurrentSpan.Context.IsValid))
{
// We need to know if we should inherit an existing Activity-based context or start a new one.
if (System.Diagnostics.Activity.Current != null && System.Diagnostics.Activity.Current.IdFormat == System.Diagnostics.ActivityIdFormat.W3C)
{
var currentActivity = System.Diagnostics.Activity.Current;
if (this.rootOperationNamesForActivityBasedAutoAdapters.Contains(currentActivity.OperationName))
{
this.tracer.StartSpanFromActivity(this.spanName, currentActivity, this.spanKind, this.links);
span = this.tracer.CurrentSpan;
}
}
}
if (span == null)
{
span = this.tracer.StartSpan(this.spanName, null, this.spanKind, options);
}
foreach (var kvp in this.attributes)
{
span.SetAttribute(kvp.Key, kvp.Value);
}
if (this.error)
{
span.Status = Trace.Status.Unknown;
}
return(new SpanShim(span));
}
public ISpan StartSpan(string operationName, ISpan parent, SpanKind kind, SpanCreationOptions options)
{
if (operationName == null)
{
throw new ArgumentNullException(nameof(operationName));
}
return(this.realTracer != null?this.realTracer.StartSpan(operationName, parent, kind, options) : BlankSpan.Instance);
}
/// <inheritdoc/>
public ISpan StartRootSpan(string operationName, SpanKind kind, SpanCreationOptions options)
{
if (operationName == null)
{
throw new ArgumentNullException(nameof(operationName));
}
return(Span.CreateRoot(operationName, kind, options, this.sampler, this.tracerConfiguration, this.spanProcessor, this.LibraryResource));
}
/// <inheritdoc/>
public ISpan StartSpan(string operationName, ISpan parent, SpanKind kind, SpanCreationOptions options)
{
if (parent == null)
{
parent = this.CurrentSpan;
}
return(Span.CreateFromParentSpan(operationName, parent, kind, options, this.sampler, this.tracerConfiguration,
this.spanProcessor, this.LibraryResource));
}
/// <summary>
/// Starts active span.
/// </summary>
/// <param name="tracer">Tracer instance.</param>
/// <param name="operationName">Span name.</param>
/// <param name="kind">Kind.</param>
/// <param name="options">Advanced span creation options.</param>
/// <param name="span">Created span.</param>
/// <returns>Scope.</returns>
public static IDisposable StartActiveSpan(this Tracer tracer, string operationName, SpanKind kind, SpanCreationOptions options, out ISpan span)
{
span = tracer.StartSpan(operationName, kind, options);
return(tracer.WithSpan(span, true));
}
private Span(
string name,
SpanContext parentSpanContext,
ActivityAndTracestate activityAndTracestate,
bool createdFromActivity,
SpanKind spanKind,
SpanCreationOptions spanCreationOptions,
Sampler sampler,
TracerConfiguration tracerConfiguration,
SpanProcessor spanProcessor,
Resource libraryResource)
{
if (name != null)
{
this.Name = name;
}
else
{
OpenTelemetrySdkEventSource.Log.InvalidArgument("StartSpan", "span name is null");
this.Name = string.Empty;
}
this.LibraryResource = libraryResource;
IEnumerable <Link> links = null;
if (spanCreationOptions != null)
{
links = spanCreationOptions.Links ?? spanCreationOptions.LinksFactory?.Invoke();
this.startTimestamp = spanCreationOptions.StartTimestamp;
}
if (this.startTimestamp == default)
{
this.startTimestamp = PreciseTimestamp.GetUtcNow();
}
this.sampler = sampler;
this.tracerConfiguration = tracerConfiguration;
this.spanProcessor = spanProcessor;
this.Kind = spanKind;
this.createdFromActivity = createdFromActivity;
this.Activity = activityAndTracestate.Activity;
var tracestate = activityAndTracestate.Tracestate;
this.IsRecording = MakeSamplingDecision(
parentSpanContext,
name,
spanCreationOptions?.Attributes,
links, // we'll enumerate again, but double enumeration over small collection is cheaper than allocation
this.Activity.TraceId,
this.Activity.SpanId,
this.sampler);
this.Activity.ActivityTraceFlags =
this.IsRecording
? this.Activity.ActivityTraceFlags |= ActivityTraceFlags.Recorded
: this.Activity.ActivityTraceFlags &= ~ActivityTraceFlags.Recorded;
// this context is definitely not remote, setting isRemote to false
this.Context = new SpanContext(this.Activity.TraceId, this.Activity.SpanId, this.Activity.ActivityTraceFlags, false, tracestate);
if (this.IsRecording)
{
this.SetLinks(links);
if (spanCreationOptions?.Attributes != null)
{
foreach (var attribute in spanCreationOptions.Attributes)
{
this.SetAttribute(attribute);
}
}
this.spanProcessor.OnStart(this);
}
}
/// <inheritdoc/>
public override ISpan StartRootSpan(string operationName, SpanKind kind, SpanCreationOptions options)
{
return(Span.CreateRoot(operationName, kind, options, this.sampler, this.tracerConfiguration, this.spanProcessor, this.LibraryResource));
}
/// <summary> /// Starts span. /// </summary> /// <param name="operationName">Span name.</param> /// <param name="parent">Parent for new span.</param> /// <param name="kind">Kind.</param> /// <param name="options">Advanced span creation options.</param> /// <returns>Span instance.</returns> public abstract TelemetrySpan StartSpan(string operationName, TelemetrySpan parent, SpanKind kind, SpanCreationOptions options);
public override ISpan StartSpan(string operationName, ISpan parent, SpanKind kind, SpanCreationOptions options)
{
return(this.realTracer != null?this.realTracer.StartSpan(operationName, parent, kind, options) : BlankSpan.Instance);
}
/// <summary>
/// Starts span. If there is active current span, it becomes a parent for returned span.
/// </summary>
/// <param name="tracer">Tracer instance.</param>
/// <param name="operationName">Span name.</param>
/// <param name="kind">Kind.</param>
/// <param name="options">Advanced span creation options.</param>
/// <returns>Span instance.</returns>
public static ISpan StartSpan(this ITracer tracer, string operationName, SpanKind kind, SpanCreationOptions options)
{
return(tracer.StartSpan(operationName, null, kind, options));
}
public override TelemetrySpan StartRootSpan(string operationName, SpanKind kind, SpanCreationOptions options)
{
return(this.realTracer != null?this.realTracer.StartRootSpan(operationName, kind, options) : BlankSpan.Instance);
}
/// <inheritdoc/>
public override TelemetrySpan StartSpan(string operationName, TelemetrySpan parentSpan, SpanKind kind, SpanCreationOptions options)
{
if (parentSpan == null)
{
parentSpan = this.CurrentSpan;
}
return(SpanSdk.CreateFromParentSpan(
operationName,
parentSpan,
kind,
options,
this.sampler,
this.tracerConfiguration,
this.spanProcessor,
this.LibraryResource));
}
// TODO: add sampling hints
/// <summary>
/// Starts root span.
/// </summary>
/// <param name="operationName">Span name.</param>
/// <param name="kind">Kind.</param>
/// <param name="options">Advanced span creation options.</param>
/// <returns>Span instance.</returns>
public abstract ISpan StartRootSpan(string operationName, SpanKind kind, SpanCreationOptions options);
/// <inheritdoc/>
public ISpan StartSpan(string operationName, SpanKind kind, SpanCreationOptions options)
{
return(this.StartSpan(operationName, null, kind, options));
}
