Tanka GraphQL

A comprehensive .NET GraphQL library providing a complete GraphQL implementation for .NET applications.

✨ Features

• 🚀 Execute queries, mutations and subscriptions - Full GraphQL operation support
• 🔍 Comprehensive validation - Built-in GraphQL specification compliance
• ⚡ Source code generation - Generate schema types from C# classes with source generators
• 📝 Modern GraphQL parser - Fast parser for executable and type system documents
• 🔗 Delegate-based resolvers - Clean resolver implementation with middleware support
• 🏗️ Middleware pipeline architecture - Modular schema building with extensible middleware stages
• 🌐 ASP.NET Core server - HTTP/WebSocket transport with real-time subscriptions
• 🔄 Apollo Federation v2.3 - Full spec compliance with @link directive and type aliasing support
• 📡 Real-time subscriptions - graphql-ws compatible WebSocket server
• ⏭️ Incremental delivery - @defer and @stream directives for progressive data loading
• 🎯 @oneOf directive - Polymorphic input types support (Stage 3 RFC)
• 🔗 Schema composition - @link directive processing for modular schema development

📖 Documentation

• Getting Started Guide
• API Documentation
• Samples & Examples

📦 Packages

Package	Description
Tanka.GraphQL	Core execution engine
Tanka.GraphQL.Language	Parser and AST
Tanka.GraphQL.Server	ASP.NET Core server
Tanka.GraphQL.Server.SourceGenerators	Code generation

🎯 Examples

Quick Server Setup:

var builder = WebApplication.CreateBuilder(args);

builder.AddTankaGraphQL()
    .AddHttp()
    .AddWebSockets()
    .AddSchema("MyAPI", schema => {
        schema.Add("Query", new FieldsWithResolvers {
            { "hello: String!", () => "Hello World!" }
        });
    });

var app = builder.Build();
app.UseWebSockets();
app.MapTankaGraphQL("/graphql", "MyAPI");
app.Run();

Advanced Examples:

• HTTP & WebSocket Server - Complete server setup
• Source Generation - Code-first development
• Apollo Federation v2.3 - Federated subgraph with @link directives
• Incremental Delivery - @defer/@stream examples
• Tanka Chat - Real-world application

🚀 Quick Start

Installation

Essential packages:

dotnet add package Tanka.GraphQL          # Core GraphQL execution
dotnet add package Tanka.GraphQL.Server   # ASP.NET Core server

Optional packages:

dotnet add package Tanka.GraphQL.Server.SourceGenerators    # Code generation
dotnet add package Tanka.GraphQL.Extensions.ApolloFederation # Federation support

Basic Usage

1. Create a simple GraphQL server:

   var builder = WebApplication.CreateBuilder(args);
   
   builder.AddTankaGraphQL()
       .AddHttp()
       .AddSchema("Demo", schema => {
           schema.Add("Query", new FieldsWithResolvers {
               { "greeting(name: String!): String!", (string name) => $"Hello, {name}!" }
           });
       });
   
   var app = builder.Build();
   app.MapTankaGraphQL("/graphql", "Demo");
   app.Run();

2. Test your GraphQL endpoint:

   curl -X POST http://localhost:5000/graphql \
     -H "Content-Type: application/json" \
     -d '{"query": "{ greeting(name: \"World\") }"}'

🏋️ Performance

Run benchmarks to see Tanka GraphQL performance:

cd benchmarks/GraphQL.Benchmarks
dotnet run --configuration Release --framework net9.0

🔧 Requirements

• .NET 9.0 or later
• ASP.NET Core 9.0 (for server features)

🤝 Contributing

We welcome contributions! Please see our contribution guidelines for details.

📄 License

This project is licensed under the MIT License - see the LICENSE file for details.