/// <summary>
/// Initializes a new instance of the <see cref="ServerRpcScope{TRequest, TResponse}"/> class.
/// </summary>
/// <param name="context">The context.</param>
/// <param name="options">The options.</param>
public ServerRpcScope(ServerCallContext context, ServerTracingInterceptorOptions options)
: base(context.Method, options.RecordMessageEvents)
{
if (!GrpcCoreInstrumentation.ActivitySource.HasListeners())
{
return;
}
var currentContext = Activity.Current?.Context;
// Extract the SpanContext, if any from the headers
var metadata = context.RequestHeaders;
if (metadata != null)
{
var propagationContext = options.Propagator.Extract(new PropagationContext(currentContext ?? default, Baggage.Current), metadata, MetadataGetter);
if (propagationContext.ActivityContext.IsValid())
{
currentContext = propagationContext.ActivityContext;
}
if (propagationContext.Baggage != default)
{
Baggage.Current = propagationContext.Baggage;
}
}
// This if block is for unit testing only.
IEnumerable <KeyValuePair <string, object> > customTags = null;
if (options.ActivityIdentifierValue != default)
{
customTags = new List <KeyValuePair <string, object> >
{
new KeyValuePair <string, object>(SemanticConventions.AttributeActivityIdentifier, options.ActivityIdentifierValue),
};
}
var activity = GrpcCoreInstrumentation.ActivitySource.StartActivity(
this.FullServiceName,
ActivityKind.Server,
currentContext ?? default,
tags: customTags);
this.SetActivity(activity);
}
/// <summary>
/// Initializes a new instance of the <see cref="ServerTracingInterceptor"/> class.
/// </summary>
/// <param name="options">The options.</param>
public ServerTracingInterceptor(ServerTracingInterceptorOptions options)
{
this.options = options ?? throw new ArgumentNullException(nameof(options));
}