ActivitySource sample

activitysourcesample.cs

using System;
using System.Diagnostics;

namespace activitysample
{
    class Program
    {
        private static readonly ActivitySource _ActivitySource = new ActivitySource("actsrc1");

        static void Main(string[] args)
        {
            var listener = new ActivityListener();
            listener.ActivityStarted += (Activity act) =>
            {
                // invoked when activity started
                Console.WriteLine($"activity started: {act.OperationName}");
            };
            listener.ActivityStopped += (Activity act) =>
            {
                // invoked when activity stopped
                Console.WriteLine($"activity stoppped: {act.OperationName}");
            };
            listener.ShouldListenTo += (ActivitySource actsrc) =>
            {
                // invoked when listening started and added new ActivitySource instance.
                // if returned true, then begin to watch the ActivitySource events.
                Console.WriteLine($"shouldlistento: {actsrc.Name}");
                return actsrc.Name == "actsrc1";
            };
            listener.Sample = (ref ActivityCreationOptions<ActivityContext> options) =>
            {
                // invoked when before activity starting.
                // if ActivitySamplingResult.None returned, no activity enabled.
                // if ActivitySamplingResult.PropagationData returned, activity will be enabled and both IsAllDataRequested and Recorded flags will be false.
                // if ActivitySamplingResult.AllData returned, activity will be enabled and IsAllDataRequested will be true, Recorded will be false.
                // if ActivitySamplingResult.AllDataAndRecorded returned, activity will be enabled and IsAllDataRequested will be true, Recorded will be true.
                Console.WriteLine($"sampling: {options.Name}");
                return ActivitySamplingResult.AllDataAndRecorded;
            };
            ActivitySource.AddActivityListener(listener);
            using (var act1 = _ActivitySource.StartActivity("act1", ActivityKind.Internal))
            {
            }
            using (var act2 = _ActivitySource.StartActivity("act2", ActivityKind.Internal))
            {
                // child Activity, set act2 as parent Activity
                using (var act3 = _ActivitySource.StartActivity("act2.child", ActivityKind.Internal))
                {
                }
            }
        }
    }
}