advanced~2.5h
Circuit Breaker with Resilience4j
A slow, failing downstream service doesn't just fail its own calls — it can quietly take the caller down with it. This module is the pattern that stops that from spreading.
Learning objectives
- Beginner: Explain the three states a circuit breaker can be in and what causes a transition between them.
- Intermediate: Wrap a Feign or WebClient call with a Resilience4j circuit breaker and a fallback method.
- Advanced: Tune a circuit breaker's failure-rate threshold and wait-duration for a specific service's real failure characteristics.
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Circuit Breaker with Resilience4j