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It was developed as part of my academic journey to explore enterprise application architecture, asynchronous communication, and real-time system design.\n\nThe system enables users to:\n- View products\n- Place manual or auto bids\n- Participate in real-time bidding with automated bid updates\n\nBacked by **Message-Driven Beans (MDB)** and **Singleton Session Beans**, this project simulates high-concurrency auction environments using **JMS Topics** for asynchronous processing and **WebSocket** for real-time updates.\n\n---\n\n## ⚙️ Technologies Used\n- **Java EE** (Jakarta EE)\n- **Payara Server (OpenMQ embedded)**\n- **Enterprise JavaBeans (EJB)**\n  - Stateless Session Beans\n  - Singleton Session Bean\n  - Message-Driven Beans\n- **Java Messaging Service (JMS)**\n- **WebSocket (for real-time updates)**\n- **HTML, CSS, JavaScript (for test UI)**\n\n---\n\n## 📦 Modules\nThe application is structured as a **Java EE EAR** project with three modules:\n- **Core Module** – Entity and DTO classes\n- **EJB Module** – Business logic (bidding, user, product, auto-bid)\n- **Web Module** – Servlet endpoints, WebSocket server, static frontend\n\n---\n\n## 🧠 Key Features\n- **Real-time bidding system** with live updates via WebSocket\n- **Auto-bidding logic**: Users can set a max bid, and the system auto-bids when outbid\n- **In-memory datastore** using a Singleton EJB for products and users\n- **JMS integration** for decoupled and scalable message processing\n- **Concurrency-handling** tested with tools like JMeter\n\n---\n\n## 📸 User Interface Preview\n\n\u003e *Click the image below to watch the full walkthrough video.*\n\n[![Auction System Tutorial](images/Thumbnail.png)](https://youtu.be/52rSvAdtjSE?si=1OrrlGGUaPhZpOsA)\n\u003c/br\u003e\u003c/br\u003e\u003c/br\u003e\u003c/br\u003e\u003c/br\u003e\n\u003e You can also view sample UI screens.\n\n\u003c/br\u003e\n\n![Home](images/home.png)\n\n\u003c/br\u003e\n\n\u003c/br\u003e\n\n![Bid](images/screencapture-localhost-8080-product-jsp-2025-06-15-21_51_31.png)\n\n\u003c/br\u003e\n\n---\n\n## Disclaimer\n\n**This project is part of my professional portfolio. You’re welcome to reference it, but please credit me if you reuse or adapt any part of it.**\n\n## License\n\nThis project is licensed under the [MIT License](LICENSE.md).\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fkavindu-kodikara%2Fbidsphere","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fkavindu-kodikara%2Fbidsphere","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fkavindu-kodikara%2Fbidsphere/lists"}