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Propagators Support #54465

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Propagators Support #54465

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7c5d554
Propagators Support
tarekgh Jun 20, 2021
cf75376
Address Feedback
tarekgh Jun 21, 2021
f3b285a
Update Extract method.
tarekgh Jun 21, 2021
7f4ebc5
Fix space trimming and baggage order
tarekgh Jun 23, 2021
fa7d0d9
Tests
tarekgh Jun 23, 2021
ec81f5a
More changes
tarekgh Jun 24, 2021
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20 changes: 19 additions & 1 deletion ...es/System.Diagnostics.DiagnosticSource/ref/System.Diagnostics.DiagnosticSourceActivity.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -253,7 +253,25 @@ public sealed class ActivityListener : IDisposable
public System.Diagnostics.SampleActivity<string>? SampleUsingParentId { get { throw null; } set { throw null; } }
public System.Diagnostics.SampleActivity<ActivityContext>? Sample { get { throw null; } set { throw null; } }
public void Dispose() { throw null; }
}
}


public abstract class TextMapPropagator
{
public delegate bool PropagatorGetterCallback(object carrier, string fieldName, out string? value);
public abstract System.Collections.Generic.IReadOnlyCollection<string> Fields { get; }
public abstract bool Inject(System.Diagnostics.Activity activity, object carrier, Action<object, string, string> setter);
public abstract bool Inject(System.Diagnostics.ActivityContext context, object carrier, Action<object, string, string> setter);
public abstract bool Inject(System.Collections.Generic.IEnumerable<System.Collections.Generic.KeyValuePair<string, string?>> baggage, object carrier, Action<object, string, string> setter);
public abstract bool Extract(object carrier, PropagatorGetterCallback getter, out string? id, out string? state);
public abstract bool Extract(object carrier, PropagatorGetterCallback getter, out System.Diagnostics.ActivityContext context);
public abstract bool Extract(object carrier, PropagatorGetterCallback getter, out System.Collections.Generic.IEnumerable<System.Collections.Generic.KeyValuePair<string, string?>>? baggage);
public static TextMapPropagator DefaultPropagator { get; set; }
public static TextMapPropagator CreateLegacyPropagator() { throw null; }
public static TextMapPropagator CreatePassThroughPropagator() { throw null; }
public static TextMapPropagator CreateOutputSuppressionPropagator() { throw null; }
public static TextMapPropagator CreateW3CPropagator() { throw null; }
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As an implementation detail, these should be caching a single instance IMO (each is allocating a HashSet internally so it's not just an empty object)

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Yes, this is implementation details. We can cache the instances we return if needed. I didn't bother in the protype to go to that level.

}
}

namespace System.Diagnostics.Metrics
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1 change: 1 addition & 0 deletions ...raries/System.Diagnostics.DiagnosticSource/src/System.Diagnostics.DiagnosticSource.csproj
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Expand Up @@ -51,6 +51,7 @@
<Compile Include="System\Diagnostics\Metrics\ObservableCounter.cs" />
<Compile Include="System\Diagnostics\Metrics\ObservableGauge.cs" />
<Compile Include="System\Diagnostics\Metrics\ObservableInstrument.cs" />
<Compile Include="System\Diagnostics\TextMapPropagator.cs" />
<None Include="ActivityUserGuide.md" />
</ItemGroup>
<ItemGroup Condition="'$(TargetFrameworkIdentifier)' == '.NETCoreApp'">
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