This project was designed to deepen my understanding of backend development principles and best practices, with a particular focus on Hibernate ORM, database design, JPA implementation, and robust unit testing. The core objective was to create a solid and maintainable foundation for a book management application, emphasizing the service, model, and data layers.

Key Features and Technologies:

• Database Design: A relational database schema was carefully designed to efficiently store and manage book information, including titles, authors, genres, ISBNs, and publication dates. Considerations were made for data integrity, relationships between entities, and potential future expansion.

• Hibernate ORM: Leveraging Hibernate, I implemented the object-relational mapping for the application. This involved mapping database tables to Java entities, defining relationships (one-to-many, many-to-many), and utilizing Hibernate's features for data persistence, retrieval, and manipulation.

• JPA Implementation: The project adheres to the Java Persistence API (JPA) standards, ensuring a consistent and portable approach to data access. JPA annotations were used to define entities, relationships, and query methods.

• Service Layer Logic: A well-defined service layer encapsulates the core business logic for managing books. This includes operations like adding new books, updating existing records, searching for books by various criteria, and handling potential data validation rules.

• Unit Testing: A comprehensive suite of unit tests was developed using JUnit and Mockito to ensure the reliability and correctness of the backend logic. Tests were written to cover various scenarios, including data persistence, retrieval, error handling, and edge cases.

Learning Outcomes:

• In-depth understanding of Hibernate ORM and JPA: Gained proficiency in mapping objects to relational databases, writing efficient queries, and managing transactions.

• Strengthened database design skills: Improved ability to design and implement relational database schemas for specific application requirements.

• Enhanced service layer development: Learned to encapsulate business logic and create maintainable and testable code.

• Mastery of unit testing techniques: Developed skills in writing effective unit tests to ensure code quality and prevent regressions.

This project served as a valuable learning experience, reinforcing my backend development skills and providing a solid foundation for building more complex and feature-rich applications in the future.