This version is still in development and is not considered stable yet. For the latest stable version, please use Spring-Cloud-CircuitBreaker 3.1.2!

Circuit Breaker Properties Configuration

You can configure CircuitBreaker and TimeLimiter configs or instances in your application’s configuration properties file. Property configuration has higher priority than Java Customizer configuration.

Descending priority from top to bottom.

Method(id) config - on specific method or operation
Service(group) config - on specific application service or operations
Global default config

ReactiveResilience4JCircuitBreakerFactory.create(String id, String groupName)
Resilience4JCircuitBreakerFactory.create(String id, String groupName)

Global Default Properties Configuration

resilience4j.circuitbreaker:
    configs:
        default:
            registerHealthIndicator: true
            slidingWindowSize: 50

resilience4j.timelimiter:
    configs:
        default:
            timeoutDuration: 5s
            cancelRunningFuture: true

Configs Properties Configuration

resilience4j.circuitbreaker:
    configs:
        groupA:
            registerHealthIndicator: true
            slidingWindowSize: 200

resilience4j.timelimiter:
    configs:
        groupC:
            timeoutDuration: 3s
            cancelRunningFuture: true

Instances Properties Configuration

resilience4j.circuitbreaker:
 instances:
     backendA:
         registerHealthIndicator: true
         slidingWindowSize: 100
     backendB:
         registerHealthIndicator: true
         slidingWindowSize: 10
         permittedNumberOfCallsInHalfOpenState: 3
         slidingWindowType: TIME_BASED
         recordFailurePredicate: io.github.robwin.exception.RecordFailurePredicate

resilience4j.timelimiter:
 instances:
     backendA:
         timeoutDuration: 2s
         cancelRunningFuture: true
     backendB:
         timeoutDuration: 1s
         cancelRunningFuture: false

ReactiveResilience4JCircuitBreakerFactory.create("backendA") or Resilience4JCircuitBreakerFactory.create("backendA") will apply instances backendA properties
ReactiveResilience4JCircuitBreakerFactory.create("backendA", "groupA") or Resilience4JCircuitBreakerFactory.create("backendA", "groupA") will apply instances backendA properties
ReactiveResilience4JCircuitBreakerFactory.create("backendC") or Resilience4JCircuitBreakerFactory.create("backendC") will apply global default properties
ReactiveResilience4JCircuitBreakerFactory.create("backendC", "groupC") or Resilience4JCircuitBreakerFactory.create("backendC", "groupC") will apply global default CircuitBreaker properties and config groupC TimeLimiter properties

For more information on Resilience4j property configuration, see Resilience4J Spring Boot 2 Configuration.

Disabling the TimeLimiter

By default, the TimeLimiter is enabled and every execution is backed by a time limit. This time limit is either defined explicitly or the default time limit (provided by io.github.resilience4j.timelimiter.TimeLimiterConfig#ofDefaults) is used.

The TimeLimiter can be globally disabled by setting the property spring.cloud.circuitbreaker.resilience4j.disable-time-limiter to true.

spring:
	cloud:
		circuitbreaker:
			resilience4j:
				disable-time-limiter: true

TimeLimiter can also be disabled for specific group or instances using spring.cloud.circuitbreaker.resilience4j.disable-time-limiter-map as below:

spring:
	cloud:
		circuitbreaker:
			resilience4j:
				disable-time-limiter-map:
					group1: true
					instanceA: false
					instanceB: true

These options for disabling TimeLimit are provided within spring-cloud-circuitbreaker and applies to both basic and reactive circuitbreaker implementation.

Priority order of disabling is : instance > group > global. Based on above configuration, instanceB and group1 have TimeLimiter disabled but instanceA has enabled. For all other instances and groups, it will fall back to globally set value of spring.cloud.circuitbreaker.resilience4j.disable-time-limiter If spring.cloud.circuitbreaker.resilience4j.disable-time-limiter is not set, by default, TimeLimit is enabled for remaining circuitbreaker instances and groups.