To-Do List on AI VOID

Chapter 9: Designing the Data Model & Persistence with JPA/Hibernate

Thu, 04 Dec 2025 00:00:00 +0000

Chapter 9: Designing the Data Model & Persistence with JPA/Hibernate

Chapter Introduction

Welcome to Chapter 9! In this chapter, we’re taking a significant leap in building our “Basic To-Do List Application” by introducing data persistence. Up until now, any data we’ve worked with would vanish as soon as our application stopped. That’s not very useful for a To-Do list! Here, we will design the data model for our To-Do items and implement the persistence layer using Java Persistence API (JPA) with Hibernate, backed by Spring Data JPA.

Chapter 11: Implementing Business Logic with Service Layer

Thu, 04 Dec 2025 00:00:00 +0000

Chapter 11: Implementing Business Logic with Service Layer

Chapter Introduction

Welcome to Chapter 11 of our Java project series! In the previous chapters, we established our project structure, set up our development environment with the latest Java version (Java 24/25), and perhaps even created some basic data models. This chapter marks a significant step forward as we introduce the Service Layer – the heart of our application’s business logic.

The service layer is crucial for separating concerns, ensuring that our core application rules, validations, and operations are encapsulated in a distinct, reusable, and testable component. Instead of scattering business logic across various parts of the application (like a user interface or data access layer), we centralize it here. This approach makes our code easier to understand, maintain, and evolve. For our Basic To-Do List Application, the service layer will manage tasks: adding, retrieving, updating, and deleting them, while enforcing any specific rules for these actions.

Chapter 14: Comprehensive Unit & Integration Testing with JUnit 5

Thu, 04 Dec 2025 00:00:00 +0000

Chapter 14: Comprehensive Unit & Integration Testing with JUnit 5

Welcome to Chapter 14! In this crucial phase of our project development, we shift our focus to ensuring the reliability and robustness of our applications through rigorous testing. We’ll dive deep into unit and integration testing, leveraging the power of JUnit 5, the de facto standard for testing in Java. This chapter is not just about writing tests; it’s about adopting a testing mindset that leads to more stable, maintainable, and production-ready code.