Hands-On Microservices with Spring Boot and Spring Cloud

Introducing the circuit breaker

Let's quickly revisit the state diagram for a circuit breaker from Chapter 8, Introduction to Spring Cloud, in the Resilience4j for improved resilience section:

The key features of a circuit breaker are as follows:

• If a circuit breaker detects too many faults, it will open its circuit, that is, not allow new calls.
• When the circuit is open, a circuit breaker will perform fast failure logic. This means that it doesn't wait for a new fault, for example, a timeout, to happen on subsequent calls. Instead, it directly redirects the call to a fallback method. The fallback method can apply various business logic to ...