Dan Vega

Writing on software development and anything else I find interesting.

All of my long-form thoughts on programming, content creation, and more, collected in chronological order.

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Filtering by tag: Spring Framework

Spring Boot 4's Bean Registrar: A Cleaner Way to Register Beans Programmatically

Learn how Spring Boot 4's new BeanRegistrar interface simplifies programmatic bean registration in Spring Framework 7. This tutorial demonstrates dynamic bean creation based on environment properties, conditional registration with complex logic, and performance optimization techniques. Discover when to use BeanRegistrar vs @Bean annotations with practical code examples and testing strategies...

Testing Spring REST APIs with RestTestClient: A Complete Guide

Explore the new Rest Test Client in Spring Framework 7, a modern replacement for RestTemplate that provides a fluent API for testing REST APIs with improved type safety and better integration with modern testing practices.

First-Class API Versioning in Spring Boot 4

Learn how to implement API versioning strategies in Spring Boot 4 applications, including best practices for managing backwards compatibility and evolution of your REST APIs.

Spring Boot 3.x Features: Complete Guide to Major Updates (2022-2025)

Explore the transformative features introduced in Spring Boot 3.0 through 3.5, from Java 17 requirements and GraalVM native images to virtual threads and enhanced observability. This comprehensive guide covers each release's major improvements, including Docker Compose integration, Testcontainers support, structured logging, and SSL certificate management. Learn how Spring Boot 3.x...

How to add Request Headers using HTTP Interfaces in Spring Boot 3

In this tutorial you will learn how to add a request header when using HTTP Interfaces in Spring Boot 3. This can be useful when you need to add a header to a single request or every single request. You will also learn how to view the headers that are...