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.

Imagine our SAGA Orchestrator (Saga Pattern Part 3) running at full speed. Customers are ordering like crazy. Suddenly the Inventory Service becomes slow. Maybe it’s due to a database lock or poor deployment.