Reworked fusion configuration to use observer. (#6310)

Author: michaelstaib

src/HotChocolate/Core/src/Execution/Configuration/ITypeModule.cs

@@ -50,6 +50,11 @@ public abstract class TypeModule : ITypeModule
     /// </summary>
     public event EventHandler<EventArgs>? TypesChanged;
 
+    internal virtual ValueTask ConfigureAsync(
+        ConfigurationContext context,
+        CancellationToken cancellationToken)
+        => default;
+
     /// <summary>
     /// Will be called by the schema building process to add the dynamically created
     /// types and type extensions to the schema building process.

src/HotChocolate/Core/src/Execution/RequestExecutorResolver.cs

@@ -243,6 +243,10 @@ await OnConfigureRequestExecutorOptionsAsync(context, setup, cancellationToken)
             typeModuleChangeMonitor.Register(typeModule);
         }
 
+        // we allow newer type modules to apply configurations.
+        await typeModuleChangeMonitor.ConfigureAsync(context, cancellationToken)
+            .ConfigureAwait(false);
+
         serviceCollection.AddSingleton<IApplicationServiceProvider>(
             _ => new DefaultApplicationServiceProvider(_applicationServices));
 
@@ -519,6 +523,20 @@ public void Register(ITypeModule typeModule)
             _typeModules.Add(typeModule);
         }
 
+        internal async ValueTask ConfigureAsync(
+            ConfigurationContext context,
+            CancellationToken cancellationToken)
+        {
+            foreach (var item in _typeModules)
+            {
+                if (item is TypeModule typeModule)
+                {
+                    await typeModule.ConfigureAsync(context, cancellationToken)
+                        .ConfigureAwait(false);
+                }
+            }
+        }
+
         public IAsyncEnumerable<ITypeSystemMember> CreateTypesAsync(IDescriptorContext context)
             => new TypeModuleEnumerable(_typeModules, context);
 

src/HotChocolate/Fusion/src/Core/Clients/IGraphQLClient.cs

@@ -1,5 +1,3 @@
-using HotChocolate.Fusion.Metadata;
-
 namespace HotChocolate.Fusion.Clients;
 
 /// <summary>
@@ -28,16 +26,3 @@ Task<GraphQLResponse> ExecuteAsync(
         GraphQLRequest request,
         CancellationToken cancellationToken);
 }
-
-/// <summary>
-/// Represents a factory for creating <see cref="IGraphQLClient"/> instances.
-/// </summary>
-public interface IGraphQLClientFactory
-{
-    /// <summary>
-    /// Creates a new <see cref="IGraphQLClient"/> instance.
-    /// </summary>
-    /// <param name="configuration"></param>
-    /// <returns></returns>
-    IGraphQLClient CreateClient(HttpClientConfiguration configuration);
-}

src/HotChocolate/Fusion/src/Core/Clients/IGraphQLClientFactory.cs

@@ -0,0 +1,16 @@
+using HotChocolate.Fusion.Metadata;
+
+namespace HotChocolate.Fusion.Clients;
+
+/// <summary>
+/// Represents a factory for creating <see cref="IGraphQLClient"/> instances.
+/// </summary>
+public interface IGraphQLClientFactory
+{
+    /// <summary>
+    /// Creates a new <see cref="IGraphQLClient"/> instance.
+    /// </summary>
+    /// <param name="configuration"></param>
+    /// <returns></returns>
+    IGraphQLClient CreateClient(HttpClientConfiguration configuration);
+}