OpenTelemetry with Spring Boot 4: The New Starter You've Been Waiting For
Learn how to use the new spring-boot-starter-opentelemetry in Spring Boot 4 to add observability with traces, metrics, and logs—no Actuator required.
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.
Building a Spring Boot 4 REST API the Fast Way
Learn how to build a REST API with Spring Boot 4 in minutes. This tutorial shows you how to create CRUD endpoints using Java records and the @RestController annotation.
Loading Resources in Spring Boot
Learn how to load resources in Spring Boot using the Resource interface. This tutorial covers three approaches for loading files from the classpath, filesystem, and URLs.
Spring Security 7 Multi-Factor Authentication: Complete Tutorial with @EnableMultiFactorAuthentication
Learn how to implement multi-factor authentication (MFA) in Spring Boot 4 using Spring Security 7's new @EnableMultiFactorAuthentication annotation. Step-by-step tutorial with one-time token login and custom PIN codes.
Spring Boot 4 Modularization: Fix Auto-Configuration Issues After Upgrading
Upgraded to Spring Boot 4 and features stopped working? Learn how the new modular auto-configuration architecture affects your migration and how to fix common issues like the H2 console not appearing.