Spring CORS Configuration: A Comprehensive Guide
Cross-Origin Resource Sharing (CORS) is a security mechanism that browsers implement to restrict web pages from making requests to a different domain than the one that served the web page.…
Java’s missing TreeMap
One thing I have always found lacking in Java collections/containers is TreeMap. A simple class that takes a hierarchical approach to mapping data to a node. Given a hierarchical string…
Goodbye Resilience4j? Native Fault Tolerance in Spring Boot 4
For years, the standard advice for building resilient Spring Boot microservices was simple: add Resilience4j. It became the Swiss Army knife for circuit breakers, rate limiters, and retries. However, with…
Load Balancing in Spring: Gateway & Discovery
Load balancing is crucial in modern applications to distribute traffic across multiple instances of a service, ensuring high availability and fault tolerance. Spring provides robust mechanisms for load balancing, both…
Spring Boot 4: Mastering REST API Versioning with @ApiVersion
As software architects, we often face the challenge of evolving our APIs without breaking the contracts relied upon by existing clients. For years, Spring developers had to rely on manual…