Layer Architecture Framework

🚀 Overview

A robust implementation of the layered architecture pattern for standalone Java applications. This framework demonstrates clean separation of concerns through well-defined service layers, data access patterns, and business logic organization. Built with Java 17+ and Maven, it provides a solid foundation for building maintainable Java applications.

✨ Key Features

Feature	Description
🏗️ Three-tier Architecture	Clear separation between service, business, and data layers
📦 Modular Design	Discrete Maven modules for better maintenance
🧪 Comprehensive Testing	Unit and integration tests with JUnit 5
🛠️ Build Automation	Maven-based build lifecycle management

🎯 Architecture

graph TD
    A[View Layer] --> B[Controller Layer]
    B --> C[Model Layer]
    C --> D[(Database)]
    
    style A fill:#ff9900,stroke:#333,stroke-width:2px
    style B fill:#00b8d4,stroke:#333,stroke-width:2px
    style C fill:#00c853,stroke:#333,stroke-width:2px
    style D fill:#7e57c2,stroke:#333,stroke-width:2px

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🛠️ Tech Stack

Technology	Version	Purpose
Java	17+	Core Programming Language
Maven	3.9.6	Build and Dependency Management
JUnit	5.9.2	Testing Framework
Mockito	5.10.0	Mocking Framework
H2 Database	2.2.224	Development Database
PostgreSQL	15+	Production Database
Hibernate	6.2+	ORM Framework

📁 Project Structure

src/
├── main/
│   ├── java/
│   │   ├── view/          # View components and UI logic
│   │   ├── controller/    # Controllers handling user input
│   │   ├── model/         # Domain models and data access
│   │   └── config/        # Application configuration
│   └── resources/
│       ├── config/        # Configuration files
│       └── db/            # Database migration scripts
└── test/
    └── java/             # Unit and integration tests

🚀 Quick Start

Prerequisites

• Java 17 JDK
• Maven 3.9+
• PostgreSQL 15+ (for production)

Setup

# Clone the repository
git clone https://github.com/ChamathDilshanC/Layer_Architecture_Final.git

# Navigate to project directory
cd Layer_Architecture_Final

# Build the project
mvn clean install

# Run the application
java -jar target/layer-architecture.jar

🌟 Features in Detail

1. Layered Architecture

   • Clear separation between service, business, and data access layers
   • Dependency injection for loose coupling
   • Interface-based design for flexibility

2. Data Access Layer

   • JPA/Hibernate implementation
   • Connection pooling
   • Transaction management
   • Entity lifecycle management

3. Business Layer

   • Domain-driven design principles
   • Business logic encapsulation
   • Validation and business rules

4. Testing

   • Unit tests with JUnit 5
   • Integration tests
   • Mockito for mocking dependencies

🤝 Contributing

We welcome contributions! Here's how you can help:

1. Fork the repository
2. Create your feature branch (git checkout -b feature/AmazingFeature)
3. Commit your changes (git commit -m 'Add some AmazingFeature')
4. Push to the branch (git push origin feature/AmazingFeature)
5. Open a Pull Request

📬 Connect With Me

📄 License

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

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Made with ❤️ by Chamath Dilshan

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