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Explains the N+1 query problem in ORMs (why it appears from lazy relationships and proxies) and provides practical solutions: JOIN FETCH, @EntityGraph, batch fetching, DTO/projection queries, and pagination-safe strategies. Slug

Explains why updating only the owner side in bidirectional JPA relationships causes lazy/loading, cache and dirty-checking issues — and shows helper methods to keep both sides synchronized.

Covers JPA relationship types (one-to-one, one-to-many, many-to-many), unidirectional vs bidirectional mapping, mappedBy, cascade types, FetchType trade-offs, and common pitfalls like N+1 and eager/lazy issues.

Practical guide to MapStruct for compile-time mapping between entities and DTOs, covering @Mapper(componentModel="spring"), @Mapping, @AfterMapping/@BeforeMapping, qualifiedByName/qualifiedBy, and common patterns. Slug

A compact overview of ORM fundamentals, JPA as a specification, Hibernate and Spring Data JPA, entity mappings/annotations, and key configuration options for schema generation and dialects.

Covers using JdbcTemplate in Spring Boot, how auto-configuration and profiles simplify setup, DispatcherServlet/routing basics, and when to prefer raw JDBC over an ORM.

A practical guide to global exception handling with @RestControllerAdvice, validation error mapping, secure file upload/download patterns, and Log4j2-based logging best practices in Spring Boot.

This post explains annotation retention, Lombok’s compile-time behavior, and Spring/Jakarta validation at runtime.

Spring Boot profiles enable environment-specific setups with minimal code and maximum flexibility.

Spring Boot enables effortless configuration by automatically wiring components based on the classpath and externalizing settings via properties or YAML files.

A concise guide to what @SpringBootApplication does, how component scanning and auto-configuration work, and practical REST routing and request/response binding patterns in Spring Boot.

This guide provides a practical overview of Spring Boot Controller, Service,DI annotations, API architecture.

Explains the difference between libraries and frameworks and details Spring’s IoC, dependency-injection strategies, bean scopes, lifecycle hooks, and configuration best practices.

A deep dive into Spring Boot’s startup phases, bean instantiation, dependency injection, and lifecycle management.

A beginner-friendly guide to understanding Spring Boot, JPA, Hibernate, and building web applications step by step.

A practical guide to mastering common attack vectors and modern defense strategies in web application security.

Learn how to securely manage user sessions across stateless HTTP using classic server-based methods and modern scalable solutions like Spring Session.

Discover how cookies empower stateless HTTP to remember users, manage sessions, and enable seamless web experiences.

Explore the depths of localStorage, sessionStorage, and IndexedDB to understand how modern web apps manage client-side data with flexibility, security, and performance in mind.

This article traces the internet’s transformation from static Web 1.0 pages to today’s interactive platforms

This article explores the core principles, benefits, and challenges of Object-Relational Mapping (ORM) as a bridge between object-oriented code and relational databases.

A practical deep dive into JPA, from specification to real-world implementation.

Provides a clear overview of JSP lifecycle, syntax and best practices for efficient web development.

HTML is essential in JSP as it structures user interactions and enables communication with the backend.

A server handles client requests using protocols, with handlers and mapping directing request processing.

How internet works and what happen in the back?

it’s all about servelet and jetty embedded server

This text explains how browsers load and display web content securely.

An in-depth explanation of hosting and how data flows through the OSI and TCP/IP models

This explains the structure and function of HTTP requests and responses in web communication.

This blog explains Java as a platform-independent, object-oriented language powered by the JVM.