https://github.com/kavindu-kodikara/bidsphere

This project is a full-stack Distributed Online Auction System built using Java EE technologies such as Enterprise JavaBeans (EJB), Java Message Service (JMS), and WebSocket. It simulates a real-time bidding environment where users can place bids, configure auto-bid rules, and receive instant updates on auction activity.
https://github.com/kavindu-kodikara/bidsphere

ejb enterprise-java j2ee java jms mdb payara

Last synced: 8 months ago
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This project is a full-stack Distributed Online Auction System built using Java EE technologies such as Enterprise JavaBeans (EJB), Java Message Service (JMS), and WebSocket. It simulates a real-time bidding environment where users can place bids, configure auto-bid rules, and receive instant updates on auction activity.

• Host: GitHub
• URL: https://github.com/kavindu-kodikara/bidsphere
• Owner: kavindu-kodikara
• License: mit
• Created: 2025-05-26T21:58:28.000Z (about 1 year ago)
• Default Branch: master
• Last Pushed: 2025-06-15T16:34:14.000Z (12 months ago)
• Last Synced: 2025-06-15T17:26:16.724Z (12 months ago)
• Topics: ejb, enterprise-java, j2ee, java, jms, mdb, payara
• Language: Java
• Homepage:
• Size: 2.56 MB
• Stars: 0
• Watchers: 0
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# Distributed Online Auction System BidSphere (Java EE + JMS)

## 🎯 Project Overview

This project is a **Java EE-based Distributed Online Auction System** built using **Enterprise JavaBeans (EJB)** and **Java Message Service (JMS)**. It was developed as part of my academic journey to explore enterprise application architecture, asynchronous communication, and real-time system design.

The system enables users to:

- View products

- Place manual or auto bids

- Participate in real-time bidding with automated bid updates

Backed 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.

---

## ⚙️ Technologies Used

- **Java EE** (Jakarta EE)

- **Payara Server (OpenMQ embedded)**

- **Enterprise JavaBeans (EJB)**

  - Stateless Session Beans

  - Singleton Session Bean

  - Message-Driven Beans

- **Java Messaging Service (JMS)**

- **WebSocket (for real-time updates)**

- **HTML, CSS, JavaScript (for test UI)**

---

## 📦 Modules

The application is structured as a **Java EE EAR** project with three modules:

- **Core Module** – Entity and DTO classes

- **EJB Module** – Business logic (bidding, user, product, auto-bid)

- **Web Module** – Servlet endpoints, WebSocket server, static frontend

---

## 🧠 Key Features

- **Real-time bidding system** with live updates via WebSocket

- **Auto-bidding logic**: Users can set a max bid, and the system auto-bids when outbid

- **In-memory datastore** using a Singleton EJB for products and users

- **JMS integration** for decoupled and scalable message processing

- **Concurrency-handling** tested with tools like JMeter

---

## 📸 User Interface Preview

> *Click the image below to watch the full walkthrough video.*

[![Auction System Tutorial](images/Thumbnail.png)](https://youtu.be/52rSvAdtjSE?si=1OrrlGGUaPhZpOsA)

> You can also view sample UI screens.

![Home](images/home.png)

![Bid](images/screencapture-localhost-8080-product-jsp-2025-06-15-21_51_31.png)

---

## Disclaimer

**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.**

## License

This project is licensed under the [MIT License](LICENSE.md).