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.
- 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)
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
- 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
Click the image below to watch the full walkthrough video.
You can also view sample UI screens.
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.
This project is licensed under the MIT License.