MyEnrichingProcessor.cs

// <copyright file="MyEnrichingProcessor.cs" company="OpenTelemetry Authors">
// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// </copyright>

using System.Diagnostics;
using OpenTelemetry;

internal class MyEnrichingProcessor : BaseProcessor<Activity>
{
    public override void OnEnd(Activity activity)
    {
        // Enrich activity with additional tags.
        activity.SetTag("myCustomTag", "myCustomTagValue");

        // Enriching from Baggage.
        // The below snippet adds every Baggage item.
        foreach (var baggage in Baggage.GetBaggage())
        {
            activity.SetTag(baggage.Key, baggage.Value);
        }

        // The below snippet adds specific Baggage item.
        var deviceTypeFromBaggage = Baggage.GetBaggage("device.type");
        if (deviceTypeFromBaggage != null)
        {
            activity.SetTag("device.type", deviceTypeFromBaggage);
        }
    }
}