Refactor OpenFeature integration and add dependency injection support (open-telemetry#2160)

* Refactor OpenFeature integration and add dependency injection support

Signed-off-by: André Silva <2493377+askpt@users.noreply.github.com>

* Added change to CHANGELOG.md

Signed-off-by: André Silva <2493377+askpt@users.noreply.github.com>

* Fix formatting in CHANGELOG.md for OpenFeature integration refactor entry

Signed-off-by: André Silva <2493377+askpt@users.noreply.github.com>

---------

Signed-off-by: André Silva <2493377+askpt@users.noreply.github.com>

Author: askpt

CHANGELOG.md

@@ -13,6 +13,8 @@ the release.
   ([#2150](https://github.com/open-telemetry/opentelemetry-demo/pull/2150))
 * [grafana] configure `traceToLogs` integration
   ([#2162](https://github.com/open-telemetry/opentelemetry-demo/pull/2162))
+* [cartservice] Refactor OpenFeature integration and add Dependency Injection support
+  ([#2160](https://github.com/open-telemetry/opentelemetry-demo/pull/2160))
 
 ## 2.0.2
 

src/cart/src/Program.cs

@@ -31,18 +31,18 @@
     .AddOpenTelemetry(options => options.AddOtlpExporter())
     .AddConsole();
 
-builder.Services.AddSingleton<ICartStore>(x=>
+builder.Services.AddSingleton<ICartStore>(x =>
 {
     var store = new ValkeyCartStore(x.GetRequiredService<ILogger<ValkeyCartStore>>(), valkeyAddress);
     store.Initialize();
     return store;
 });
 
-builder.Services.AddSingleton<IFeatureClient>(x => {
-    var flagdProvider = new FlagdProvider();
-    Api.Instance.SetProviderAsync(flagdProvider).GetAwaiter().GetResult();
-    var client = Api.Instance.GetClient();
-    return client;
+builder.Services.AddOpenFeature(openFeatureBuilder =>
+{
+    openFeatureBuilder
+        .AddHostedFeatureLifecycle()
+        .AddProvider(_ => new FlagdProvider());
 });
 
 builder.Services.AddSingleton(x =>
@@ -82,7 +82,7 @@
 
 var app = builder.Build();
 
-var ValkeyCartStore = (ValkeyCartStore) app.Services.GetRequiredService<ICartStore>();
+var ValkeyCartStore = (ValkeyCartStore)app.Services.GetRequiredService<ICartStore>();
 app.Services.GetRequiredService<StackExchangeRedisInstrumentation>().AddConnection(ValkeyCartStore.GetConnection());
 
 app.MapGrpcService<CartService>();

src/cart/src/cart.csproj

@@ -31,6 +31,8 @@
     <PackageReference Include="OpenFeature.Contrib.Providers.Flagd" Version="0.3.2" />
     <PackageReference Include="OpenFeature.Contrib.Hooks.Otel" Version="0.2.0" />
     <PackageReference Include="OpenFeature" Version="2.4.0" />
+    <PackageReference Include="OpenFeature.DependencyInjection" Version="2.4.0" />
+    <PackageReference Include="OpenFeature.Hosting" Version="2.4.0" />
   </ItemGroup>
 
   <ItemGroup>