Java-Based POS & Stock Management System

📌 Project Overview

This project is a Java-based Point-of-Sale (POS) and stock management system developed following SOLID principles, clean architecture, and industry-standard design patterns.
The system is designed to support concurrent transactions, ensuring data consistency and reliability in multi-user environments.

Key goals of the project include scalability, maintainability, testability, and robustness, with a strong emphasis on clean coding practices and structured software design.

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🚀 Key Features

• Java-based POS system with modular and layered architecture
• Inventory and stock management with batch-aware logic
• Concurrency handling for parallel transactions and stock updates
• Application of design patterns to improve extensibility and maintainability
• MySQL-based persistence for transactional and inventory data
• Comprehensive unit and integration testing

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🛠️ Technologies & Tools

• Language: Java
• Database: MySQL
• Testing: JUnit, Mockito
• Concurrency: Java concurrency utilities (locks, thread pools)
• Design Principles: SOLID, Clean Code
• Design Patterns: Factory, Command, Builder, Singleton, Template Method
• IDE: Visual Studio Code
• Code Quality: SonarQube

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📁 Repository Structure

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├── .scannerwork/      # Static code analysis reports (SonarQube)
├── .vscode/           # VS Code workspace and debugging configuration
├── bin/               # Compiled Java bytecode output
├── lib/               # External libraries (JUnit, Mockito, JDBC drivers)
├── src/               # Main application source code
├── test-servlet/      # Servlet-based concurrency and stress testing
├── test/              # Unit and integration tests
└── README.md          # Project documentation and overview