When building Spring MVC or Spring Boot backend applications, handling incoming data from clients correctly is crucial. Two commonly used annotations, @RequestBody and @ModelAttribute, often cause confusion. They may seem similar, but they serve distinct purposes in request-data binding. Here’s…
When working on Spring MVC or Spring Boot applications, handling exceptions, data binding, or shared model attributes often ends up duplicated across controllers. That’s where @ControllerAdvice comes in—a powerful annotation that helps you centralize behavior across all controllers. In this…
When building web applications with Spring Boot, choosing between @Controller and @RestController is more than just a matter of syntax—it shapes how your application handles HTTP responses. I’ve navigated this decision in multiple projects, and understanding the distinction helps avoid…
Understanding Spring MVC’s internal request processing can transform how you architect controllers, filters, interceptors, and exception handling in your application. Let’s walk through the typical execution flow—complete with illustrations from real-world projects. 🧭 1. DispatcherServlet: Spring’s Front Controller Every HTTP…
When building robust Spring Boot or Spring MVC applications, you’ll often need to execute reusable logic—like logging, authentication, or compression—before or after handling HTTP requests. But should you use a Servlet Filter or a Spring Interceptor? In my experience as…
When building web applications with Spring MVC or Spring Boot, you’ve likely encountered errors bubbling up to the end user or your logs—especially unexpected ones. The @ExceptionHandler annotation exists precisely to help you handle exceptions neatly within your controllers or…
If you’re configuring a Spring Boot application, you’ve likely used the @Value annotation to inject configuration values from application.properties or application.yml. It seems straightforward—but there are important subtleties to be aware of. In this post, I’ll break down the key…
In modern backend and infrastructure setups, managing storage performance and data reliability is critical. Whether you’re configuring local servers or working with cloud-hosted volumes, understanding RAID (Redundant Array of Independent Disks) is essential. In this post, we’ll break down RAID…
If you’ve ever dealt with lazy loading issues, N+1 query nightmares, or mysteriously open database connections in your Spring Boot application, you’ve likely encountered the notorious Open Session in View (OSIV) setting. It’s a seemingly harmless configuration, but it hides…
Java’s exception handling model is built around one crucial question: Who’s responsible for handling what? This philosophy emerges clearly in Java’s two main exception categories — Checked and Unchecked. Understanding the difference can guide cleaner, more maintainable code. Let’s dive…