Spring Cloud Circuit Breaker - SirajChaudhary/comprehensive-example-on-microservices-using-spring-boot-with-spring-cloud GitHub Wiki

<!-- spring cloud starter circuit breaker (resilience4j implementation) -->
<dependency>
	<groupId>org.springframework.cloud</groupId>
	<artifactId>spring-cloud-starter-circuitbreaker-resilience4j</artifactId>
	<version>2.0.2</version>
</dependency>

<!-- spring cloud starter aop (Its needed for spring-cloud-starter-circuitbreaker-resilience4j) -->
<dependency>
	<groupId>org.springframework.boot</groupId>
	<artifactId>spring-boot-starter-aop</artifactId>
</dependency>

# SPRING CLOUD CIRCUIT BREAKER WITH RESILIENCE4J IMPLEMENTATION
# Spring Cloud Circuit breaker provides an abstraction across different circuit breaker implementations 
# i.e Hystrix, Resilience4j, Sentinel, Spring Retry
# circuit breaker switch is indicated with following terms 
# i.e. UP means switch is closed and so allowed all the calls closed - UP, open - DOWN, half-open - UNKNOWN
resilience4j:
  circuitbreaker:
    instances:
      airportPilotService:
        # slidingWindowSize indicate (e.g. 5) after how many calls the switch will be open or close
        slidingWindowSize: '5'
        # we are now setting threshold value here like failure rate is greater then 60% make the switch open(DOWN)
        failureRateThreshold: '60'
        # switch will wait 50 seconds in open(DOWN) state so the down service airport-pilot-service get 50 seconds to recover
        waitDurationInOpenState: '50000'
        # after 50 seconds making switch as half open
        automaticTransitionFromOpenToHalfOpenEnabled: 'true'
        # allow 4 calls in half-open state of switch
        permittedNumberOfCallsInHalfOpenState: '4'
        allowHealthIndicatorToFail: 'true'
        registerHealthIndicator: 'true'