public override async Task Invoke()
{
var parentActivity = Activity.Current;
if (parentActivity == null)
{
await _handlerInvokerImplementation.Invoke();
return;
}
var initialTags = new ActivityTagsCollection();
foreach (var tag in parentActivity.Tags)
{
initialTags.Add(tag.Key, tag.Value);
}
initialTags["messaging.operation"] = "process";
using var activity = RebusDiagnosticConstants.ActivitySource.StartActivity($"{_messageType} process", ActivityKind.Internal, parentActivity.Context, initialTags);
TagHelper.CopyBaggage(parentActivity, activity);
await _handlerInvokerImplementation.Invoke();
}
private static Activity?StartActivity(OutgoingStepContext context)
{
var parentActivity = Activity.Current;
if (parentActivity == null)
{
return(null);
}
Activity?activity = null;
if (RebusDiagnosticConstants.ActivitySource.HasListeners())
{
var message = context.Load <TransportMessage>();
var messageType = message.GetMessageType();
var messageWrapper = new TransportMessageWrapper(message);
var activityKind = messageWrapper.GetIntentOption() == Headers.IntentOptions.PublishSubscribe
? ActivityKind.Producer
: ActivityKind.Client;
var activityName = $"{messageType} send";
var initialTags = TagHelper.ExtractInitialTags(messageWrapper);
// Per the spec on how to handle array types: https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/common/common.md#attributes
var destinationAddresses = context.Load <DestinationAddresses>();
initialTags.Add("messaging.destination", JsonConvert.SerializeObject(destinationAddresses.ToList()));
// TODO: Transport specific tags, like rabbitmq routing key
activity = RebusDiagnosticConstants.ActivitySource.StartActivity(activityName, activityKind,
parentActivity.Context, initialTags);
TagHelper.CopyBaggage(parentActivity, activity);
// TODO: Figure out if this is actually needed now
// DiagnosticListener.OnActivityImport(activity, context);
}
SendBeforeSendEvent(context);
return(activity);
}