doc(propagators): switch to use new Extensions.Propagators package, add some documentation (#3271)

src/OpenTelemetry.Extensions.Propagators/CHANGELOG.md

@@ -0,0 +1,6 @@
+# Changelog
+
+## Unreleased
+
+* Initial release. This has been ported as is from
+[OpenTelemetry.Api](../OpenTelemetry.Api/README.md) package.

src/OpenTelemetry.Extensions.Propagators/README.md

@@ -0,0 +1,49 @@
+# Propagator formats for OpenTelemetry .NET
+
+[![NuGet](https://img.shields.io/nuget/v/OpenTelemetry.Extensions.Propagators.svg)](https://www.nuget.org/packages/OpenTelemetry.Extensions.Propagators)
+[![NuGet](https://img.shields.io/nuget/dt/OpenTelemetry.Extensions.Propagators.svg)](https://www.nuget.org/packages/OpenTelemetry.Extensions.Propagators)
+
+The package provides context
+propagators by following the [OpenTelemetry specification](https://opentelemetry.io/docs/reference/specification/context/api-propagators/)
+(currently supporting [B3](https://github.com/openzipkin/b3-propagation) format)
+for tracing.
+
+## Installation
+
+Add a reference to the
+[`OpenTelemetry.Extensions.Propagators`](https://www.nuget.org/packages/OpenTelemetry.Extensions.Propagators)
+package in your project.
+
+```shell
+dotnet add package --prerelease OpenTelemetry.Extensions.Propagators
+```
+
+## Configuration
+
+Use `B3 OpenZipkin` context only:
+
+```csharp
+using OpenTelemetry;
+using OpenTelemetry.Extensions.Propagators;
+
+Sdk.SetDefaultTextMapPropagator(new B3Propagator())
+```
+
+Use `B3 OpenZipkin` and `W3C Baggage` propagators at the same time:
+
+```csharp
+using OpenTelemetry;
+using OpenTelemetry.Context.Propagation;
+using OpenTelemetry.Extensions.Propagators;
+
+Sdk.SetDefaultTextMapPropagator(new CompositeTextMapPropagator(new TextMapPropagator[]
+    {
+        new OpenTelemetry.Extensions.Propagators.B3Propagator(),
+        new BaggagePropagator(),
+    }));
+```
+
+## References
+
+* [B3 (Zipkin) Context specification](https://github.com/openzipkin/b3-propagation)
+* [OpenTelemetry Project](https://opentelemetry.io/)

test/OpenTelemetry.Instrumentation.Grpc.Tests/GrpcTests.server.cs

@@ -126,7 +126,7 @@ namespace OpenTelemetry.Instrumentation.Grpc.Tests
             try
             {
                 // B3Propagator along with the headers passed to the client.SayHello ensure that the instrumentation creates a sibling activity
-                Sdk.SetDefaultTextMapPropagator(new B3Propagator());
+                Sdk.SetDefaultTextMapPropagator(new Extensions.Propagators.B3Propagator());
                 var exportedItems = new List<Activity>();
                 var tracerProviderBuilder = Sdk.CreateTracerProviderBuilder();
 

test/OpenTelemetry.Instrumentation.Grpc.Tests/OpenTelemetry.Instrumentation.Grpc.Tests.csproj

@@ -32,6 +32,7 @@
 
   <ItemGroup>
     <ProjectReference Include="$(RepoRoot)\src\OpenTelemetry.Exporter.InMemory\OpenTelemetry.Exporter.InMemory.csproj" />
+    <ProjectReference Include="$(RepoRoot)\src\OpenTelemetry.Extensions.Propagators\OpenTelemetry.Extensions.Propagators.csproj" />
     <ProjectReference Include="$(RepoRoot)\src\OpenTelemetry.Instrumentation.AspNetCore\OpenTelemetry.Instrumentation.AspNetCore.csproj" />
     <ProjectReference Include="$(RepoRoot)\src\OpenTelemetry.Instrumentation.GrpcNetClient\OpenTelemetry.Instrumentation.GrpcNetClient.csproj" />
     <ProjectReference Include="$(RepoRoot)\src\OpenTelemetry.Instrumentation.Http\OpenTelemetry.Instrumentation.Http.csproj" />

test/OpenTelemetry.Instrumentation.W3cTraceContext.Tests/OpenTelemetry.Instrumentation.W3cTraceContext.Tests.csproj

@@ -26,7 +26,7 @@
     <Compile Include="$(RepoRoot)\src\OpenTelemetry.Api\Internal\StatusHelper.cs" Link="Includes\StatusHelper.cs" />
     <Compile Include="$(RepoRoot)\src\OpenTelemetry.Api\Internal\IActivityEnumerator.cs" Link="Includes\IActivityEnumerator.cs" />
     <Compile Include="$(RepoRoot)\src\OpenTelemetry.Api\Internal\EnumerationHelper.cs" Link="Includes\EnumerationHelper.cs" />
-  <Compile Include="$(RepoRoot)\src\OpenTelemetry.Api\Internal\SpanAttributeConstants.cs" Link="Includes\SpanAttributeConstants.cs" />
+    <Compile Include="$(RepoRoot)\src\OpenTelemetry.Api\Internal\SpanAttributeConstants.cs" Link="Includes\SpanAttributeConstants.cs" />
   </ItemGroup>
 
   <ItemGroup Condition="'$(TargetFramework)' == 'net6.0'">