特定断路器配置

与提供默认配置类似，你可以创建一个 Customizer Bean，它将被传递给 Resilience4JCircuitBreakerFactory 或 ReactiveResilience4JCircuitBreakerFactory。

@Bean
public Customizer<Resilience4JCircuitBreakerFactory> slowCustomizer() {
	return factory -> factory.configure(builder -> builder.circuitBreakerConfig(CircuitBreakerConfig.ofDefaults())
			.timeLimiterConfig(TimeLimiterConfig.custom().timeoutDuration(Duration.ofSeconds(2)).build()), "slow");
}

除了配置创建的熔断器外，你还可以在熔断器创建后但在返回给调用者之前对其进行自定义。为此，你可以使用 addCircuitBreakerCustomizer 方法。这对于向 Resilience4J 熔断器添加事件处理器非常有用。

@Bean
public Customizer<Resilience4JCircuitBreakerFactory> slowCustomizer() {
	return factory -> factory.addCircuitBreakerCustomizer(circuitBreaker -> circuitBreaker.getEventPublisher()
	.onError(normalFluxErrorConsumer).onSuccess(normalFluxSuccessConsumer), "normalflux");
}

如果你需要将安全上下文传播到熔断器，则必须配置熔断器以使用 DelegatingSecurityContextExecutorService。

@Bean
public Customizer<Resilience4JCircuitBreakerFactory> groupExecutorServiceCustomizer() {
	return factory -> factory.configureGroupExecutorService(group -> new DelegatingSecurityContextExecutorService(Executors.newVirtualThreadPerTaskExecutor()));
}

响应式示例

@Bean
public Customizer<ReactiveResilience4JCircuitBreakerFactory> slowCustomizer() {
	return factory -> {
		factory.configure(builder -> builder
		.timeLimiterConfig(TimeLimiterConfig.custom().timeoutDuration(Duration.ofSeconds(2)).build())
		.circuitBreakerConfig(CircuitBreakerConfig.ofDefaults()), "slow", "slowflux");
		factory.addCircuitBreakerCustomizer(circuitBreaker -> circuitBreaker.getEventPublisher()
        	.onError(normalFluxErrorConsumer).onSuccess(normalFluxSuccessConsumer), "normalflux");
     };
}