[Instrumentation.EntityFrameworkCore] Update EntityFrameworkCore Acti…

…vitySource name (#486)

src/OpenTelemetry.Instrumentation.EntityFrameworkCore/CHANGELOG.md

@@ -5,6 +5,10 @@
 * Updated OTel SDK package version to 1.2.0
   [#347](https://github.com/open-telemetry/opentelemetry-dotnet-contrib/pull/347)
 
+* Update the `ActivitySource` name used to the assembly name:
+`OpenTelemetry.Instrumentation.StackExchangeRedis`
+  [#486](https://github.com/open-telemetry/opentelemetry-dotnet-contrib/pull/486)
+
 ## 1.0.0-beta.3
 
 * Going forward the NuGet package will be

src/OpenTelemetry.Instrumentation.EntityFrameworkCore/Implementation/EntityFrameworkDiagnosticListener.cs

@@ -25,9 +25,6 @@ internal sealed class EntityFrameworkDiagnosticListener : ListenerHandler
     {
         internal const string DiagnosticSourceName = "Microsoft.EntityFrameworkCore";
 
-        internal const string ActivitySourceName = "OpenTelemetry.EntityFrameworkCore";
-        internal const string ActivityName = ActivitySourceName + ".Execute";
-
         internal const string EntityFrameworkCoreCommandCreated = "Microsoft.EntityFrameworkCore.Database.Command.CommandCreated";
         internal const string EntityFrameworkCoreCommandExecuting = "Microsoft.EntityFrameworkCore.Database.Command.CommandExecuting";
         internal const string EntityFrameworkCoreCommandExecuted = "Microsoft.EntityFrameworkCore.Database.Command.CommandExecuted";
@@ -38,6 +35,9 @@ internal sealed class EntityFrameworkDiagnosticListener : ListenerHandler
         internal const string AttributeDbName = "db.name";
         internal const string AttributeDbStatement = "db.statement";
 
+        internal static readonly string ActivitySourceName = typeof(EntityFrameworkDiagnosticListener).Assembly.GetName().Name;
+        internal static readonly string ActivityName = ActivitySourceName + ".Execute";
+
         private static readonly Version Version = typeof(EntityFrameworkDiagnosticListener).Assembly.GetName().Version;
 #pragma warning disable SA1202 // Elements should be ordered by access <- In this case, Version MUST come before SqlClientActivitySource otherwise null ref exception is thrown.
         internal static readonly ActivitySource SqlClientActivitySource = new ActivitySource(ActivitySourceName, Version.ToString());