ActivityContext.cs

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using System.Diagnostics.CodeAnalysis;
 
namespace System.Diagnostics;
 
public readonly struct ActivityContext : IEquatable<ActivityContext>
{
    public ActivityTraceId TraceId { get; }
 
    public ActivitySpanId SpanId { get; }
 
    public ActivityTraceFlags TraceFlags { get; }
 
    public string? TraceState { get; }
 
    public bool IsRemote { get; }
 
    public ActivityContext(ActivityTraceId traceId, ActivitySpanId spanId, ActivityTraceFlags traceFlags, string? traceState = null, bool isRemote = false)
    {
        TraceId = traceId;
        SpanId = spanId;
        TraceFlags = traceFlags;
        TraceState = traceState;
        IsRemote = isRemote;
    }
 
    public static bool TryParse(string? traceParent, string? traceState, out ActivityContext context)
    {
        if (traceParent == null)
        {
            context = default(ActivityContext);
            return false;
        }
        return Activity.TryConvertIdToContext(traceParent, traceState, out context);
    }
 
    public static ActivityContext Parse(string traceParent, string? traceState)
    {
        if (traceParent == null)
        {
            throw new ArgumentNullException("traceParent");
        }
        if (!Activity.TryConvertIdToContext(traceParent, traceState, out var context))
        {
            throw new ArgumentException(System.SR.InvalidTraceParent);
        }
        return context;
    }
 
    public bool Equals(ActivityContext value)
    {
        if (SpanId.Equals(value.SpanId) && TraceId.Equals(value.TraceId) && TraceFlags == value.TraceFlags && TraceState == value.TraceState)
        {
            return IsRemote == value.IsRemote;
        }
        return false;
    }
 
    public override bool Equals([NotNullWhen(true)] object? obj)
    {
        if (!(obj is ActivityContext value))
        {
            return false;
        }
        return Equals(value);
    }
 
    public static bool operator ==(ActivityContext left, ActivityContext right)
    {
        return left.Equals(right);
    }
 
    public static bool operator !=(ActivityContext left, ActivityContext right)
    {
        return !(left == right);
    }
 
    public override int GetHashCode()
    {
        return HashCode.Combine(TraceId, SpanId, TraceFlags, TraceState);
    }
}