Go Mini Project: User & Product Services

Overview

This is a mini project implemented in Go (Golang) with two services: user and product. The project follows Hexagonal Architecture for better separation of concerns, scalability, and testability. I use Fiber handling HTTP requests and defining routes for user and product services, GORM for interacting with the PostgreSQL database, Kafka for event streming between services, and Swagger for API documentation.

• Notification Service (https://github.com/WarisLi/Golang-notification-service.git) : Handles event-based notifications triggered by the Product Service.

• Shared Event (https://github.com/WarisLi/Golang-shared-event.git) : Shared repository containing event definitions used for internal service communication.

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Technologies Used

• Go : Programming language
• Hexagonal architecture : Architecture pattern:
• Fiber : HTTP framework
• GORM : ORM for database operations
• PostgreSQL : Relational database
• Kafka : Event streaming
• Swagger : API documentation

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Features

1. User Service
   • User registration
   • Login
2. Product Service
   • Get product
   • Create new product
   • Update product
   • Delete product

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Project Structure

.
/project-root
│── /cmd                 # Entry point of the application
│   ├── main.go
│── /internal            # Internal code that should not be imported externally
│   ├── /core            # Business logic
│   │   ├── /ports       # Interfaces (Ports) such as Repository, Service
│   │   │   ├── product_repository.go
│   │   │   ├── product_service.go
│   │   │   ├── user_repository.go
│   │   │   ├── user_service.go
│   │   ├── /models      # Structs for entities
│   │   │   ├── product.go
│   │   │   ├── user.go
│   ├── /adapters        # Infrastructure (Database, API, HTTP)
│   │   ├── /database    # Database Adapter (GORM, SQL)
│   │   │   ├── gorm_adapter.go
│   │   ├── /http        # HTTP Adapter (Fiber)
│   │   │   ├── router.go           # Setup routes for Fiber
│   │   │   ├── product_handler.go  # HTTP handler for Product
│   │   │   ├── user_handler.go     # HTTP handler for User
│   │   │   ├── /middleware
│   │   │   │   ├── jwt_middleware.go     # JWT Middleware
│   │   │   │   ├── logging_middleware.go # Logging Middleware
│   │   ├── /producer       # Producer Adapter (Kafka)
│   │   │   ├── kafka_producer.go
│   ├── /config
│   │   ├── postgres.go  # Setup DB Connection
│   ├── /tests           # Unit tests
│   │   ├── product_test.go
│   │   ├── user_test.go
│   │   ├── utils.go
│── go.mod