Spring Boot

SonarQube integration with Spring Boot

✅ What is SonarQube? SonarQube is an open-source code quality and security analysis tool. It scans your source code to detect: Bugs 🐞 Code smells 🧹 Vulnerabilities 🔓 Duplications 🔁...

✅ Session Management in Spring Boot

Session management in Spring Boot is about tracking user state across multiple HTTP requests — typically used for login sessions, shopping carts, etc. 🧱 1. Default Behavior (HTTP Session) Spring...

Input Validation in REST API (Spring Boot)

Validating inputs for a REST API in Spring Boot is typically done using Java Bean Validation (JSR-380) with annotations like @NotNull, @Size, @Email, etc., and the @Valid or @Validated annotation...

✅ CrudRepository vs JpaRepository

Feature CrudRepository JpaRepository 📦 Package org.springframework.data.repository org.springframework.data.jpa.repository 🔁 Inheritance Base interface for CRUD operations Extends PagingAndSortingRepository & CrudRepository 🔨 Basic CRUD (save, findById, delete) ✅ Yes ✅ Yes 📄 Pagination...

✅ What is Pagination?

Pagination is a technique to split large sets of data into smaller, manageable chunks (pages), improving performance and user experience—especially in APIs and UI tables. 🔧 Why Use Pagination? 🐢...

✅ How Rollback Works in Spring Boot?

🔄 Spring uses: @Transactional annotation AOP (Aspect-Oriented Programming) Underlying transaction manager (e.g., JDBC, JPA, Hibernate) 🧪 Example: Rollback with @Transactional @Servicepublic class AccountService {     @Autowired    private AccountRepository...