Scope Fusion document cache to schema, but not executor

Author: tobias-tengler

src/HotChocolate/Fusion-vnext/src/Fusion.Execution/DependencyInjection/HotChocolateFusionServiceCollectionExtensions.cs

@@ -3,6 +3,7 @@
 using HotChocolate.Fusion.Configuration;
 using HotChocolate.Fusion.Execution;
 using HotChocolate.Fusion.Execution.Clients;
+using HotChocolate.Language;
 using Microsoft.Extensions.DependencyInjection.Extensions;
 using Microsoft.Extensions.ObjectPool;
 using Microsoft.Extensions.Options;
@@ -74,7 +75,30 @@ private static DefaultFusionGatewayBuilder CreateBuilder(
         }
 
         var builder = new DefaultFusionGatewayBuilder(services, name);
+        builder.AddDocumentCache();
         builder.UseDefaultPipeline();
         return builder;
     }
+
+    private static IFusionGatewayBuilder AddDocumentCache(this IFusionGatewayBuilder builder)
+    {
+        builder.Services.TryAddKeyedSingleton<IDocumentCache>(
+            builder.Name,
+            static (sp, schemaName) =>
+            {
+                var optionsMonitor = sp.GetRequiredService<IOptionsMonitor<FusionGatewaySetup>>();
+                var setup = optionsMonitor.Get((string)schemaName!);
+
+                var options = FusionRequestExecutorManager.CreateOptions(setup);
+
+                return new DefaultDocumentCache(options.OperationDocumentCacheSize);
+            });
+
+        return builder.ConfigureSchemaServices(
+            static (sp, s) => s.AddSingleton<IDocumentCache>(schemaServices =>
+            {
+                var schemaName = schemaServices.GetRequiredService<ISchemaDefinition>().Name;
+                return sp.GetRequiredKeyedService<IDocumentCache>(schemaName);
+            }));
+    }
 }

src/HotChocolate/Fusion-vnext/src/Fusion.Execution/Execution/FusionRequestExecutorManager.cs

@@ -431,12 +431,6 @@ private static void AddParserServices(IServiceCollection services)
     {
         services.AddSingleton<IDocumentHashProvider>(static _ => new MD5DocumentHashProvider(HashFormat.Hex));
         services.AddSingleton(static sp => sp.GetRequiredService<ISchemaDefinition>().GetParserOptions());
-        services.AddSingleton<IDocumentCache>(
-            static sp =>
-            {
-                var options = sp.GetRequiredService<ISchemaDefinition>().GetOptions();
-                return new DefaultDocumentCache(options.OperationDocumentCacheSize);
-            });
     }
 
     private void AddDocumentValidator(