[sdk] Use reflection and dynamic types to start providers

build/Common.props

@@ -37,7 +37,8 @@
     <MicrosoftCodeCoveragePkgVer>[17.4.1]</MicrosoftCodeCoveragePkgVer>
     <MicrosoftExtensionsDependencyInjectionPkgVer>[3.1.0,)</MicrosoftExtensionsDependencyInjectionPkgVer>
     <MicrosoftExtensionsDependencyInjectionAbstractionsPkgVer>$(MicrosoftExtensionsDependencyInjectionPkgVer)</MicrosoftExtensionsDependencyInjectionAbstractionsPkgVer>
-    <MicrosoftExtensionsHostingAbstractionsPkgVer>[2.1.0,)</MicrosoftExtensionsHostingAbstractionsPkgVer>
+    <MicrosoftExtensionsHostingPkgVer>[2.1.0,)</MicrosoftExtensionsHostingPkgVer>
+    <MicrosoftExtensionsHostingAbstractionsPkgVer>$(MicrosoftExtensionsHostingPkgVer)</MicrosoftExtensionsHostingAbstractionsPkgVer>
     <MicrosoftExtensionsLoggingPkgVer>[3.1.0,)</MicrosoftExtensionsLoggingPkgVer>
     <MicrosoftExtensionsLoggingConfigurationPkgVer>$(MicrosoftExtensionsLoggingPkgVer)</MicrosoftExtensionsLoggingConfigurationPkgVer>
     <MicrosoftExtensionsOptionsPkgVer>[3.1.0,)</MicrosoftExtensionsOptionsPkgVer>

docs/trace/getting-started-aspnetcore/Program.cs

@@ -27,8 +27,7 @@
         .AddService(serviceName: "OTel.NET Getting Started"))
     .WithTracing(builder => builder
         .AddAspNetCoreInstrumentation()
-        .AddConsoleExporter())
-    .StartWithHost();
+        .AddConsoleExporter());
 
 var app = appBuilder.Build();
 

docs/trace/getting-started-aspnetcore/getting-started-aspnetcore.csproj

@@ -8,7 +8,6 @@
 
   <ItemGroup>
     <ProjectReference Include="$(RepoRoot)\src\OpenTelemetry.Exporter.Console\OpenTelemetry.Exporter.Console.csproj" />
-    <ProjectReference Include="$(RepoRoot)\src\OpenTelemetry.Extensions.Hosting\OpenTelemetry.Extensions.Hosting.csproj" />
     <ProjectReference Include="$(RepoRoot)\src\OpenTelemetry.Instrumentation.AspNetCore\OpenTelemetry.Instrumentation.AspNetCore.csproj" />
   </ItemGroup>
 

examples/AspNetCore/Examples.AspNetCore.csproj

@@ -10,7 +10,6 @@
   </ItemGroup>
 
   <ItemGroup>
-    <ProjectReference Include="$(RepoRoot)\src\OpenTelemetry.Extensions.Hosting\OpenTelemetry.Extensions.Hosting.csproj" />
     <ProjectReference Include="$(RepoRoot)\src\OpenTelemetry.Exporter.Console\OpenTelemetry.Exporter.Console.csproj" />
     <ProjectReference Include="$(RepoRoot)\src\OpenTelemetry.Exporter.OpenTelemetryProtocol\OpenTelemetry.Exporter.OpenTelemetryProtocol.csproj" />
     <ProjectReference Include="$(RepoRoot)\src\OpenTelemetry.Exporter.OpenTelemetryProtocol.Logs\OpenTelemetry.Exporter.OpenTelemetryProtocol.Logs.csproj" />

examples/AspNetCore/Program.cs

@@ -44,8 +44,7 @@
 // for manual instrumentation
 appBuilder.Services.AddSingleton<Instrumentation>();
 
-// Configure OpenTelemetry tracing & metrics with auto-start using the
-// StartWithHost extension from OpenTelemetry.Extensions.Hosting.
+// Configure OpenTelemetry tracing & metrics.
 appBuilder.Services.AddOpenTelemetry()
     .ConfigureResource(configureResource)
     .WithTracing(builder =>
@@ -127,8 +126,7 @@
                 builder.AddConsoleExporter();
                 break;
         }
-    })
-    .StartWithHost();
+    });
 
 // Clear default logging providers used by WebApplication host.
 appBuilder.Logging.ClearProviders();

examples/GrpcService/Examples.GrpcService.csproj

@@ -16,7 +16,6 @@
     <ProjectReference Include="$(RepoRoot)\src\OpenTelemetry.Exporter.Console\OpenTelemetry.Exporter.Console.csproj" />
     <ProjectReference Include="$(RepoRoot)\src\OpenTelemetry.Exporter.Jaeger\OpenTelemetry.Exporter.Jaeger.csproj" />
     <ProjectReference Include="$(RepoRoot)\src\OpenTelemetry.Exporter.Zipkin\OpenTelemetry.Exporter.Zipkin.csproj" />
-    <ProjectReference Include="$(RepoRoot)\src\OpenTelemetry.Extensions.Hosting\OpenTelemetry.Extensions.Hosting.csproj" />
     <ProjectReference Include="$(RepoRoot)\src\OpenTelemetry.Instrumentation.AspNetCore\OpenTelemetry.Instrumentation.AspNetCore.csproj" />
   </ItemGroup>
 

examples/GrpcService/Startup.cs

@@ -61,8 +61,7 @@ public void ConfigureServices(IServiceCollection services)
                             builder.AddConsoleExporter();
                             break;
                     }
-                })
-                .StartWithHost();
+                });
         }
 
         public void Configure(IApplicationBuilder app, IWebHostEnvironment env)

examples/MicroserviceExample/WebApi/Startup.cs

@@ -43,8 +43,7 @@ public void ConfigureServices(IServiceCollection services)
                     {
                         var zipkinHostName = Environment.GetEnvironmentVariable("ZIPKIN_HOSTNAME") ?? "localhost";
                         b.Endpoint = new Uri($"http://{zipkinHostName}:9411/api/v2/spans");
-                    }))
-                .StartWithHost();
+                    }));
         }
 
         public void Configure(IApplicationBuilder app, IWebHostEnvironment env)

examples/MicroserviceExample/WebApi/WebApi.csproj

@@ -10,7 +10,6 @@
   <ItemGroup>
     <ProjectReference Include="$(RepoRoot)\src\OpenTelemetry.Instrumentation.AspNetCore\OpenTelemetry.Instrumentation.AspNetCore.csproj" />
     <ProjectReference Include="$(RepoRoot)\src\OpenTelemetry.Exporter.Zipkin\OpenTelemetry.Exporter.Zipkin.csproj" />
-    <ProjectReference Include="$(RepoRoot)\src\OpenTelemetry.Extensions.Hosting\OpenTelemetry.Extensions.Hosting.csproj" />
   </ItemGroup>
 
   <ItemGroup>

examples/MicroserviceExample/WorkerService/Program.cs

@@ -42,8 +42,7 @@ public static IHostBuilder CreateHostBuilder(string[] args) =>
                             {
                                 var zipkinHostName = Environment.GetEnvironmentVariable("ZIPKIN_HOSTNAME") ?? "localhost";
                                 b.Endpoint = new Uri($"http://{zipkinHostName}:9411/api/v2/spans");
-                            }))
-                        .StartWithHost();
+                            }));
                 });
     }
 }

examples/MicroserviceExample/WorkerService/WorkerService.csproj

@@ -11,7 +11,6 @@
   <ItemGroup>
     <ProjectReference Include="$(RepoRoot)\src\OpenTelemetry\OpenTelemetry.csproj" />
     <ProjectReference Include="$(RepoRoot)\src\OpenTelemetry.Exporter.Zipkin\OpenTelemetry.Exporter.Zipkin.csproj" />
-    <ProjectReference Include="$(RepoRoot)\src\OpenTelemetry.Extensions.Hosting\OpenTelemetry.Extensions.Hosting.csproj" />
   </ItemGroup>
 
   <ItemGroup>

src/OpenTelemetry.Exporter.Jaeger/README.md

@@ -98,8 +98,7 @@ services.AddOpenTelemetry()
                 client.DefaultRequestHeaders.Add("X-MyCustomHeader", "value");
                 return client;
             };
-        }))
-    .StartWithHost();
+        }));
 ```
 
 For users using

src/OpenTelemetry.Exporter.OpenTelemetryProtocol/README.md

@@ -135,8 +135,7 @@ services.AddOpenTelemetry()
                 client.DefaultRequestHeaders.Add("X-MyCustomHeader", "value");
                 return client;
             };
-        }))
-    .StartWithHost();
+        }));
 ```
 
 For users using

src/OpenTelemetry.Exporter.Prometheus.AspNetCore/README.md

@@ -28,8 +28,7 @@ dotnet add package --prerelease OpenTelemetry.Exporter.Prometheus.AspNetCore
     ```csharp
     services.AddOpenTelemetry()
         .WithMetrics(builder => builder
-            .AddPrometheusExporter())
-        .StartWithHost();
+            .AddPrometheusExporter());
     ```
 
 * Or configure directly:

src/OpenTelemetry.Exporter.Zipkin/README.md

@@ -87,8 +87,7 @@ services.AddOpenTelemetry()
             HttpClient client = new HttpClient();
             client.DefaultRequestHeaders.Add("X-MyCustomHeader", "value");
             return client;
-        }))
-    .StartWithHost();
+        }));
 ```
 
 For users using

src/OpenTelemetry.Extensions.Hosting/.publicApi/netstandard2.0/PublicAPI.Unshipped.txt

@@ -1,13 +1,11 @@
 Microsoft.Extensions.DependencyInjection.OpenTelemetryServicesExtensions
 OpenTelemetry.Metrics.MeterProviderBuilderExtensions
-OpenTelemetry.OpenTelemetryBuilderHostingExtensions
 OpenTelemetry.Trace.TracerProviderBuilderExtensions
 static Microsoft.Extensions.DependencyInjection.OpenTelemetryServicesExtensions.AddOpenTelemetryMetrics(this Microsoft.Extensions.DependencyInjection.IServiceCollection services) -> Microsoft.Extensions.DependencyInjection.IServiceCollection
 static Microsoft.Extensions.DependencyInjection.OpenTelemetryServicesExtensions.AddOpenTelemetryMetrics(this Microsoft.Extensions.DependencyInjection.IServiceCollection services, System.Action<OpenTelemetry.Metrics.MeterProviderBuilder> configure) -> Microsoft.Extensions.DependencyInjection.IServiceCollection
 static Microsoft.Extensions.DependencyInjection.OpenTelemetryServicesExtensions.AddOpenTelemetryTracing(this Microsoft.Extensions.DependencyInjection.IServiceCollection services) -> Microsoft.Extensions.DependencyInjection.IServiceCollection
 static Microsoft.Extensions.DependencyInjection.OpenTelemetryServicesExtensions.AddOpenTelemetryTracing(this Microsoft.Extensions.DependencyInjection.IServiceCollection services, System.Action<OpenTelemetry.Trace.TracerProviderBuilder> configure) -> Microsoft.Extensions.DependencyInjection.IServiceCollection
 static OpenTelemetry.Metrics.MeterProviderBuilderExtensions.Configure(this OpenTelemetry.Metrics.MeterProviderBuilder meterProviderBuilder, System.Action<System.IServiceProvider, OpenTelemetry.Metrics.MeterProviderBuilder> configure) -> OpenTelemetry.Metrics.MeterProviderBuilder
 static OpenTelemetry.Metrics.MeterProviderBuilderExtensions.GetServices(this OpenTelemetry.Metrics.MeterProviderBuilder meterProviderBuilder) -> Microsoft.Extensions.DependencyInjection.IServiceCollection
-static OpenTelemetry.OpenTelemetryBuilderHostingExtensions.StartWithHost(this OpenTelemetry.OpenTelemetryBuilder builder) -> OpenTelemetry.OpenTelemetryBuilder
 static OpenTelemetry.Trace.TracerProviderBuilderExtensions.Configure(this OpenTelemetry.Trace.TracerProviderBuilder tracerProviderBuilder, System.Action<System.IServiceProvider, OpenTelemetry.Trace.TracerProviderBuilder> configure) -> OpenTelemetry.Trace.TracerProviderBuilder
 static OpenTelemetry.Trace.TracerProviderBuilderExtensions.GetServices(this OpenTelemetry.Trace.TracerProviderBuilder tracerProviderBuilder) -> Microsoft.Extensions.DependencyInjection.IServiceCollection

src/OpenTelemetry.Extensions.Hosting/CHANGELOG.md

@@ -2,6 +2,12 @@
 
 ## Unreleased
 
+* Removed the `OpenTelemetryBuilder.StartWithHost` extension and moved the
+  functionality into the SDK `AddOpenTelemetry` extension. With this change
+  `OpenTelemetry.Extensions.Hosting` is no longer needed and will be marked as
+  deprecated.
+  ([#4151](https://github.com/open-telemetry/opentelemetry-dotnet/pull/4151))
+
 ## 1.4.0-rc.3
 
 Released 2023-Feb-01

src/OpenTelemetry.Extensions.Hosting/OpenTelemetryServicesExtensions.cs

@@ -51,7 +51,7 @@ public static class OpenTelemetryServicesExtensions
     /// <param name="services"><see cref="IServiceCollection"/>.</param>
     /// <returns>Supplied <see cref="IServiceCollection"/> for chaining
     /// calls.</returns>
-    [Obsolete("Use the AddOpenTelemetry().WithTracing(configure).StartWithHost() pattern instead. This method will be removed in a future version.")]
+    [Obsolete("Use the AddOpenTelemetry().WithTracing(configure) pattern instead. This method will be removed in a future version.")]
     public static IServiceCollection AddOpenTelemetryTracing(this IServiceCollection services)
         => AddOpenTelemetryTracing(services, b => { });
 
@@ -68,10 +68,10 @@ public static IServiceCollection AddOpenTelemetryTracing(this IServiceCollection
     /// cref="TracerProviderBuilder"/>.</param>
     /// <returns>Supplied <see cref="IServiceCollection"/> for chaining
     /// calls.</returns>
-    [Obsolete("Use the AddOpenTelemetry().WithTracing(configure).StartWithHost() pattern instead. This method will be removed in a future version.")]
+    [Obsolete("Use the AddOpenTelemetry().WithTracing(configure) pattern instead. This method will be removed in a future version.")]
     public static IServiceCollection AddOpenTelemetryTracing(this IServiceCollection services, Action<TracerProviderBuilder> configure)
     {
-        services.AddOpenTelemetry().WithTracing(configure).StartWithHost();
+        services.AddOpenTelemetry().WithTracing(configure);
 
         return services;
     }
@@ -100,7 +100,7 @@ public static IServiceCollection AddOpenTelemetryTracing(this IServiceCollection
     /// <param name="services"><see cref="IServiceCollection"/>.</param>
     /// <returns>Supplied <see cref="IServiceCollection"/> for chaining
     /// calls.</returns>
-    [Obsolete("Use the AddOpenTelemetry().WithMetrics(configure).StartWithHost() pattern instead. This method will be removed in a future version.")]
+    [Obsolete("Use the AddOpenTelemetry().WithMetrics(configure) pattern instead. This method will be removed in a future version.")]
     public static IServiceCollection AddOpenTelemetryMetrics(this IServiceCollection services)
         => AddOpenTelemetryMetrics(services, b => { });
 
@@ -117,10 +117,10 @@ public static IServiceCollection AddOpenTelemetryMetrics(this IServiceCollection
     /// cref="TracerProviderBuilder"/>.</param>
     /// <returns>Supplied <see cref="IServiceCollection"/> for chaining
     /// calls.</returns>
-    [Obsolete("Use the AddOpenTelemetry().WithMetrics(configure).StartWithHost() pattern instead. This method will be removed in a future version.")]
+    [Obsolete("Use the AddOpenTelemetry().WithMetrics(configure) pattern instead. This method will be removed in a future version.")]
     public static IServiceCollection AddOpenTelemetryMetrics(this IServiceCollection services, Action<MeterProviderBuilder> configure)
     {
-        services.AddOpenTelemetry().WithMetrics(configure).StartWithHost();
+        services.AddOpenTelemetry().WithMetrics(configure);
 
         return services;
     }