DeleteCustomerReactive.java

public Mono<String> deleteCustomer(@PathVariable String customerId){
    return webClient.delete()
            .uri("/customers/" + customerId)
            .retrieve()
            .bodyToMono(String.class)
            .transform(it -> {
                ReactiveCircuitBreaker rcb = reactiveCircuitBreakerFactory.create("customer-service");
                return rcb.run(it, throwable -> Mono.just(customerId));
            });
}