Frontend
JSP & JSTL
HTML5
Vanilla JS
CSS3
Selected Work
Overview
A full-featured web-based grocery ordering platform designed to bridge the gap between consumers and retail inventory. It enables customers to browse catalogs, manage a shopping cart, and securely check out, while providing dedicated dashboards for administrators, support agents, and delivery personnel to manage operations, orders, and customer queries efficiently.
Main Mockup
Grocery Dashboard Preview
Placeholder
Tech Stack
Built With a Robust Stack
Backend
Java 11/17
Servlet API
Database
PostgreSQL
JDBC
Supabase
DevOps & Tools
Docker
Maven
Tomcat 9.0
Jetty
Key Features
Key Features & Core Functionalities
Robust Shopping Cart
Session-based cart allowing dynamic item management, checkout calculations, taxes, and conditional delivery fees.
Multi-Role Portals
Distinct authorization flows for Customers, Admins (inventory), Support Agents, and Delivery Personnel.
End-to-End Orders
Comprehensive transaction handling with an advanced OrderDAO, allowing history views and ongoing tracking.
Support Ticketing
A built-in module for submitting issues, allowing support agents to interactively review, escalate, and resolve customer tickets.
Dynamic Catalog Browsing
An efficient API-like JSP catalog engine for smooth searching and filtering of grocery products by category.
Multi-Stage Docker
A streamlined DevOps pipeline ensuring high availability and robust containerized Tomcat deployments.
Architecture & Patterns
Technical Architecture & Patterns
Design Patterns
Model-View-Controller (MVC)
The system strictly adheres to the MVC structural pattern. The Model package contains plain Java Entities, the Servlet package acts as controllers for parsing requests, and the webapp directory houses all JSP views.
Data Access Object (DAO) Pattern
Database interaction is entirely abstracted via DAOs (e.g., OrderDAO). This encapsulates connection logic and SQL logic, distinctly separating database operations from the application's business core.
Stateful Session Management
Relies on Java's native HttpSession mechanism to securely persist user states, contexts, and dynamic shopping carts without resorting to heavy, repetitive database read operations.