Code Review Video
This code review demonstrates the original Hospital Management System artifact, analyzes areas for improvement, and outlines the comprehensive enhancements implemented across three categories: Software Design and Engineering, Algorithms and Data Structures, and Databases.
Code Review Overview
The code review video provides a comprehensive walkthrough of the Hospital Management System's evolution from a basic console application to a production-ready full-stack web application. This presentation demonstrates my understanding of software engineering principles, analytical thinking, and ability to communicate technical concepts effectively.
Code Review Highlights
Part 1: Original Code Walkthrough
- File Structure: Review of the original monolithic Java application with flat architecture
- Data Storage: Analysis of fixed-size arrays limiting scalability (Doctor[], Patient[], Employee[])
- Console Interface: Demonstration of basic menu system with limited functionality
- CRUD Operations: Examination of simple but inefficient data manipulation methods
- Lack of Persistence: Highlighting that all data was lost when the program closed
Part 2: Code Analysis - Areas for Improvement
Software Design Issues:
- Lack of modularity - all logic in one or two classes
- No abstraction layer for data access
- Poor scalability due to fixed capacity constraints
- Insufficient validation and error handling
- Minimal documentation and comments
Algorithmic Issues:
- Inefficient linear search (O(n) complexity)
- No conflict detection for appointment scheduling
- No priority handling for urgent cases
- Manual payroll calculations not based on actual data
Database Issues:
- Complete absence of persistent storage
- All data existed only in memory
- No way to share data across systems
- Unsuitable for real hospital operations
Part 3: Enhancement Plan and Outcomes
Enhancement 1: Software Design and Engineering
- Layered Architecture: Implemented separation of concerns with model, repository, service, and controller layers
- Repository Pattern: Created interfaces that abstract data access from business logic
- Validation Utilities: Centralized validation logic for consistency
- Documentation: Added comprehensive Javadoc and inline comments
- Result: Modular, scalable, maintainable architecture following industry standards
Enhancement 2: Algorithms and Data Structures
- HashMap Implementation: Replaced linear search with O(1) lookup time
- Conflict Detection: Implemented algorithm to prevent appointment overlaps
- Priority Queues: Added priority-based scheduling for urgent appointments
- Automated Payroll: Calculated payroll automatically from appointment data
- Result: Performance improved from O(n²) to O(n log n) for critical operations
Enhancement 3: Databases and Full-Stack
- MongoDB Integration: Added persistent storage with four collections (doctors, patients, appointments, employees)
- Query Optimization: Implemented indexes on frequently searched fields
- Spring Boot API: Built RESTful backend serving data to front-end
- React Dashboard: Created professional web interface with data visualization
- JWT Authentication: Implemented secure authentication system
- Result: Complete, production-ready full-stack application
Course Outcomes Alignment
Outcome 1: Collaborative Environments
Code review demonstrates peer communication, comprehensive documentation supports team collaboration, and modular design enables parallel development.
Outcome 2: Professional Communications
Video presentation showcases ability to explain technical concepts clearly, narratives are well-written and adapted to audience, and code comments facilitate understanding.
Outcome 3: Computing Solutions
Algorithms solve real-world healthcare problems, design patterns address scalability needs, and trade-offs are managed appropriately.
Outcome 4: Techniques and Tools
Modern frameworks (Spring Boot, React) demonstrate industry-standard practices, efficient algorithms deliver value, and professional development tools are used effectively.
Outcome 5: Security Mindset
Input validation prevents vulnerabilities, JWT authentication secures access, BCrypt protects passwords, and error handling maintains system stability.
Key Takeaways
The code review demonstrates my ability to:
- Analyze existing code critically and identify areas for improvement
- Articulate technical concepts in an accessible, professional manner
- Plan and execute systematic enhancements across multiple domains
- Apply computer science principles to solve real-world problems
- Document and communicate design decisions effectively
- Align technical work with professional course outcomes