Do you know that? You start a new project with a clean domain model. Your Order entity is perfectly normalized, the database relationships are cleanly defined (3rd normal form), and saving an order is lightning fast. Everything feels right.

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.