[OpAMP.Client] Add support for plain http transport

src/OpenTelemetry.OpAmp.Client/FrameDispatcher.cs

@@ -6,7 +6,7 @@
 
 namespace OpenTelemetry.OpAmp.Client;
 
-internal class FrameDispatcher : IDisposable
+internal sealed class FrameDispatcher : IDisposable
 {
     private readonly IOpAmpTransport transport;
     private readonly FrameBuilder frameBuilder;

src/OpenTelemetry.OpAmp.Client/FrameProcessor.cs

@@ -11,7 +11,7 @@
 
 namespace OpenTelemetry.OpAmp.Client;
 
-internal class FrameProcessor
+internal sealed class FrameProcessor
 {
     private readonly ConcurrentDictionary<Type, ImmutableList<IOpAmpListener>> listeners = [];
 

src/OpenTelemetry.OpAmp.Client/OpAmpClient.cs

@@ -6,7 +6,7 @@
 
 namespace OpenTelemetry.OpAmp.Client;
 
-internal class OpAmpClient
+internal sealed class OpAmpClient
 {
     private readonly OpAmpClientSettings settings = new();
     private readonly FrameProcessor processor = new();

src/OpenTelemetry.OpAmp.Client/OpAmpClientSettings.cs

@@ -27,7 +27,12 @@ internal class OpAmpClientSettings
     /// <summary>
     /// Gets or sets the unique identifier for the current instance.
     /// </summary>
-    public Guid InstanceUid { get; set; } = Guid.NewGuid(); // TODO: use Guid.CreateVersion7() with .NET 9+
+    public Guid InstanceUid { get; set; }
+#if NET9_0_OR_GREATER
+        = Guid.CreateVersion7();
+#else
+        = Guid.NewGuid();
+#endif
 
     /// <summary>
     /// Gets or sets the chosen metrics schema to write.

src/OpenTelemetry.OpAmp.Client/OpenTelemetry.OpAmp.Client.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>$(NetMinimumSupportedVersion);$(NetStandardMinimumSupportedVersion);$(NetFrameworkMinimumSupportedVersion)</TargetFrameworks>
+    <TargetFrameworks>$(NetMinimumSupportedVersion);net9.0;$(NetStandardMinimumSupportedVersion);$(NetFrameworkMinimumSupportedVersion)</TargetFrameworks>
     <Description>OpAMP Client for OpenTelemetry .NET.</Description>
     <PackageTags>$(PackageTags);distributed-tracing;opamp;opamp-client</PackageTags>
     <MinVerTagPrefix>OpAmp.Client-</MinVerTagPrefix>

src/OpenTelemetry.OpAmp.Client/Transport/Http/PlainHttpTransport.cs

@@ -11,7 +11,7 @@
 
 namespace OpenTelemetry.OpAmp.Client.Transport.Http;
 
-internal class PlainHttpTransport : IOpAmpTransport, IDisposable
+internal sealed class PlainHttpTransport : IOpAmpTransport, IDisposable
 {
     private readonly Uri uri;
     private readonly HttpClient httpClient;