Week 10 Worklog

Day	Task	Start Date	Completion Date	Reference Material
1-3	- Design database schema (ERD) - Create JPA entities and repositories - Implement user authentication APIs + Register, Login, Logout + JWT token generation	2025/11/10	2025/11/12	Spring Boot JPA docs
4-5	- Develop blood donation APIs + Create donation request + Search donors by blood type + Update donation status - Test APIs with Postman	2025/11/13	2025/11/14	REST API best practices
6-7	- Build JAR file with Maven - Deploy backend to EC2 + Upload JAR to S3 + Configure EC2 with Java + Run Spring Boot application - Test deployed APIs	2025/11/15	2025/11/16	AWS EC2, S3 docs

Backend Development:
- Designed database schema with 5 main tables: Users, BloodDonations, Donors, Hospitals, DonationHistory
- Created JPA entities with relationships (OneToMany, ManyToOne)
- Implemented Spring Data JPA repositories
- Built authentication system with JWT tokens
- Developed RESTful APIs for user management and blood donations
API Implementation:
- User APIs: Register, Login, Get Profile, Update Profile
- Donation APIs: Create Request, Search Donors, Update Status, Get History
- Implemented proper error handling and validation
- Tested all endpoints with Postman
Backend Deployment:
- Built JAR file using Maven: mvn clean package
- Uploaded JAR to S3 bucket for artifact storage
- Configured EC2 instance with Java 17
- Deployed Spring Boot application on EC2
- Configured application.properties with RDS connection
- Verified APIs working on EC2

JPA Relationships: Circular dependency issues → Used @JsonIgnore and DTOs
JWT Implementation: Token expiration handling → Implemented refresh token mechanism
EC2 Deployment: Port 8080 not accessible → Configured Security Group inbound rules