OwinInstrumentationEventSource.cs

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

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

namespace OpenTelemetry.Instrumentation.Owin;

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

    [NonEvent]
    public void RequestFilterException(Exception ex)
    {
        if (this.IsEnabled(EventLevel.Error, (EventKeywords)(-1)))
        {
            this.RequestFilterException(ex.ToInvariantString());
        }
    }

    [Event(EventIds.RequestIsFilteredOut, Message = "Request is filtered out.", Level = EventLevel.Verbose)]
    public void RequestIsFilteredOut()
    {
        this.WriteEvent(EventIds.RequestIsFilteredOut);
    }

    [Event(EventIds.RequestFilterException, Message = "InstrumentationFilter threw exception. Request will not be collected. Exception {0}.", Level = EventLevel.Error)]
    public void RequestFilterException(string exception)
    {
        this.WriteEvent(EventIds.RequestFilterException, exception);
    }

    [NonEvent]
    public void EnrichmentException(Exception exception)
    {
        if (this.IsEnabled(EventLevel.Error, (EventKeywords)(-1)))
        {
            this.EnrichmentException(exception.ToInvariantString());
        }
    }

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

    [Event(EventIds.EnrichmentException, Message = "Enrichment threw exception. Exception {0}.", Level = EventLevel.Error)]
    public void EnrichmentException(string exception)
    {
        this.WriteEvent(EventIds.EnrichmentException, exception);
    }

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

    private class EventIds
    {
        public const int RequestIsFilteredOut = 1;
        public const int RequestFilterException = 2;
        public const int EnrichmentException = 3;
        public const int FailedToReadEnvironmentVariable = 4;
    }
}