The year is 2025. Spring Boot 4 is here, and we no longer use deprecated RestTemplate calls. We combine the new Declarative HTTP Client feature with the proven Circuit Breaker Pattern and refine it with a Retry strategy.

Hello everyone,

The move to Spring Boot 4 is more than just a dependency update - it is a leap into a new era of application development. The base is Java 17+ and Jakarta EE 11, but the real gains lie in the Developer Experience (DX) and the reduction of boilerplate code.

Spring Boot 4: Die wichtigsten Neuerungen

Spring Boot 4 ist nicht nur ein inkrementelles Update; es ist ein strategischer Sprung, der die Architektur modernisiert und die Performance in Cloud-Umgebungen maximiert.