🚀 Complete migration of Java 8 Spring Cloud Netflix microservices to modern .NET 9 architecture

This project represents a comprehensive re-architecture and migration of the microservice-kiwi English dictionary and learning platform from Java 8 Spring Cloud Netflix to modern .NET 9 microservices.

• Framework: Java 8 + Spring Cloud Netflix
• Service Discovery: Eureka
• API Gateway: Zuul
• Circuit Breaker: Hystrix
• Configuration: Spring Cloud Config
• Infrastructure: MySQL, Redis, RabbitMQ, Elasticsearch, FastDFS, Nginx

• Framework: .NET 9 + ASP.NET Core
• API Gateway: YARP (Yet Another Reverse Proxy)
• Circuit Breaker: Polly
• Messaging: MassTransit with RabbitMQ
• Service Discovery: Built-in .NET Service Discovery
• Configuration: .NET Configuration Providers
• Logging: Serilog with structured logging
• Monitoring: OpenTelemetry

• Kiwi.Gateway - YARP-based API Gateway with authentication, rate limiting, and circuit breaker
• Kiwi.Shared - Common libraries, base entities, and shared services

• Kiwi.Auth.API - JWT-based authentication and authorization service
• Kiwi.UPMS.API - User Permission Management System
• Kiwi.Word.API - Dictionary and word processing service with Elasticsearch integration
• Kiwi.AI.API - Machine learning and AI features using ML.NET and Semantic Kernel
• Kiwi.Crawler.API - Web scraping service with Selenium and PuppeteerSharp
• Kiwi.Configuration.API - Centralized configuration management

• .NET 9 - Latest .NET framework
• Entity Framework Core - ORM with MySQL support
• MassTransit - Distributed application framework for message-based communication
• Polly - Resilience and transient-fault-handling library
• Serilog - Structured logging
• AutoMapper - Object-to-object mapping
• FluentValidation - Input validation
• MediatR - CQRS and mediator pattern implementation
• OpenTelemetry - Observability and monitoring

• .NET 9 SDK
• Docker & Docker Compose
• MySQL 8.0+
• Redis
• RabbitMQ
• Elasticsearch 7.17.9

1. Clone the repository

   git clone <repository-url>
   cd kason-tools-server

2. Start infrastructure services

   docker-compose up -d mysql redis rabbitmq elasticsearch

3. Restore dependencies

   dotnet restore

4. Run database migrations

   dotnet ef database update --project src/Services/Auth/Kiwi.Auth.API
   dotnet ef database update --project src/Services/UPMS/Kiwi.UPMS.API
   dotnet ef database update --project src/Services/Word/Kiwi.Word.API

5. Start services

   # Terminal 1 - Gateway
   cd src/Gateway/Kiwi.Gateway
   dotnet run
   
   # Terminal 2 - Auth Service
   cd src/Services/Auth/Kiwi.Auth.API
   dotnet run
   
   # Terminal 3 - Word Service
   cd src/Services/Word/Kiwi.Word.API
   dotnet run
   
   # Continue for other services...

Full stack deployment:

docker-compose up --build

Individual service deployment:

docker-compose up --build kiwi-auth-api

• ASPNETCORE_ENVIRONMENT - Development/Staging/Production
• ConnectionStrings__DefaultConnection - MySQL connection string
• ConnectionStrings__Redis - Redis connection string
• MessageBroker__Host - RabbitMQ host
• JwtSettings__Secret - JWT signing key
• Elasticsearch__Url - Elasticsearch endpoint

• Gateway: 5000 (HTTP), 5001 (HTTPS)
• Auth Service: 5010
• UPMS Service: 5020
• Word Service: 5030
• AI Service: 5040
• Crawler Service: 5050
• Configuration Service: 5060

Each service exposes Swagger documentation at /swagger endpoint:

• Gateway: http://localhost:5000/swagger
• Auth Service: http://localhost:5010/swagger
• Word Service: http://localhost:5030/swagger

Authentication:

# Login
POST /api/auth/login
{
  "email": "user@example.com",
  "password": "password123"
}

# Register
POST /api/auth/register
{
  "email": "user@example.com",
  "password": "password123",
  "firstName": "John",
  "lastName": "Doe"
}

Word Service:

# Search words
GET /api/word/search?query=hello&limit=10

# Get word definition
GET /api/word/{id}

• Health Checks: /health endpoint on each service
• Metrics: OpenTelemetry integration
• Logging: Structured logging with Serilog
• Tracing: Distributed tracing across services

• Hot Reload: dotnet watch run
• Database Migrations: dotnet ef migrations add <name>
• Testing: dotnet test
• Code Coverage: dotnet test --collect:"XPlat Code Coverage"

kason-tools-server/
├── src/
│   ├── Gateway/
│   │   └── Kiwi.Gateway/
│   ├── Services/
│   │   ├── Auth/Kiwi.Auth.API/
│   │   ├── UPMS/Kiwi.UPMS.API/
│   │   ├── Word/Kiwi.Word.API/
│   │   ├── AI/Kiwi.AI.API/
│   │   ├── Crawler/Kiwi.Crawler.API/
│   │   └── Configuration/Kiwi.Configuration.API/
│   └── Shared/
│       └── Kiwi.Shared/
├── docker-compose.yml
└── Kiwi.Microservices.sln

1. Performance: .NET 9 offers superior performance compared to Java 8
2. Modern Patterns: CQRS, Event Sourcing, and Clean Architecture
3. Cloud Native: Built for containerization and cloud deployment
4. Observability: Comprehensive monitoring and tracing
5. Developer Experience: Hot reload, better tooling, and IntelliSense
6. Maintenance: Simplified dependency management and updates

1. Fork the repository
2. Create a feature branch
3. Make your changes
4. Add tests
5. Submit a pull request

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

Migration Status: ✅ Complete architecture scaffolding | 🚧 Implementation in progress