microservices
Steps to implement Circuit Breaker (Resilience4j).
- Add Dependency:
resilience4j-spring-boot2. - Configuration: Define failure rate thresholds, window size, and wait duration in
application.yml.
resilience4j.circuitbreaker: instances: userService: failureRateThreshold: 50 waitDurationInOpenState: 10000
- Usage: Use
@CircuitBreakerannotation on the service method.
@CircuitBreaker(name = "userService", fallbackMethod = "fallback") public User getUser(String id) { ... }
- Fallback: Provide a method with the same signature to return a default value or cached data.