AspNetInstrumentationEventSource.cs

// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0

using System;
using System.Diagnostics.Tracing;
using OpenTelemetry.Internal;

namespace OpenTelemetry.Instrumentation.AspNet.Implementation;

/// <summary>
/// EventSource events emitted from the project.
/// </summary>
[EventSource(Name = "OpenTelemetry-Instrumentation-AspNet")]
internal sealed class AspNetInstrumentationEventSource : EventSource
{
    public static AspNetInstrumentationEventSource Log = new();

    [NonEvent]
    public void RequestFilterException(string operationName, Exception ex)
    {
        if (this.IsEnabled(EventLevel.Error, EventKeywords.All))
        {
            this.RequestFilterException(operationName, ex.ToInvariantString());
        }
    }

    [NonEvent]
    public void EnrichmentException(string eventName, Exception ex)
    {
        if (this.IsEnabled(EventLevel.Error, EventKeywords.All))
        {
            this.EnrichmentException(eventName, ex.ToInvariantString());
        }
    }

    [NonEvent]
    public void FailedToReadEnvironmentVariable(string envVarName, Exception ex)
    {
        if (this.IsEnabled(EventLevel.Error, EventKeywords.All))
        {
            this.EnrichmentException(envVarName, ex.ToInvariantString());
        }
    }

    [Event(1, Message = "Request is filtered out and will not be collected. Operation='{0}'", Level = EventLevel.Verbose)]
    public void RequestIsFilteredOut(string operationName)
    {
        this.WriteEvent(1, operationName);
    }

    [Event(2, Message = "Filter callback threw an exception. Request will not be collected. Operation='{0}': {1}", Level = EventLevel.Error)]
    public void RequestFilterException(string operationName, string exception)
    {
        this.WriteEvent(2, operationName, exception);
    }

    [Event(3, Message = "Enrich callback threw an exception. Event='{0}': {1}", Level = EventLevel.Error)]
    public void EnrichmentException(string eventName, string exception)
    {
        this.WriteEvent(3, eventName, exception);
    }

    [Event(4, Message = "Failed to read environment variable='{0}': {1}", Level = EventLevel.Error)]
    public void FailedToReadEnvironmentVariable(string envVarName, string exception)
    {
        this.WriteEvent(4, envVarName, exception);
    }
}