I am confused with CircuitBreaker using WebClient. When the dependent service is down it, the fallback is not executed.
Do I need additional configuration?
For the CircuitBreaker using RestTemplate this is working without any further configuration. See my example code here: https://github.com/altfatterz/resilience4j-demo
Here is my example
@GetMapping("/")
public Mono<String> hello() {
return webClient.build()
.get().uri(uriBuilder -> uriBuilder
.scheme("http")
.host("slow-service").path("/slow")
.build())
.retrieve().bodyToMono(String.class).transform(it -> {
CircuitBreaker cb = circuitBreakerFactory.create("slow");
return cb.run(() -> it, throwable -> Mono.just("fallback"));
});
}
using the following configuration:
@Bean
public Customizer<ReactiveResilience4JCircuitBreakerFactory> defaultCustomizer() {
return factory -> factory.configureDefault(id -> new Resilience4JConfigBuilder(id)
.circuitBreakerConfig(ofDefaults())
.timeLimiterConfig(TimeLimiterConfig.custom().timeoutDuration(Duration.ofSeconds(3)).build()).build());
}
@Bean
@LoadBalanced
public WebClient.Builder webClient() {
return WebClient.builder();
}
