斷路器回退方法不起作用

Question

我在計費服務微服務中有以下代碼：

@RestController
@RequestMapping("/billing")
public class WebController {

    @Autowired
    private BillingService service;
    
    @GetMapping("/hi")
    @CircuitBreaker(name="BillingServiceCapture", fallbackMethod = "hiFallback")
    public String hi() {
        return "Hello Khushboo!";
    }
    
    public String hiFallback() {
        return "Hello Khushboo FallBack!";
    }

應用程序.屬性文件：

server.port=9191
spring.h2.console.enable=true
spring.application.name=billing-service
eureka.client.serviceurl.defaultzone=http://localhost:8761/eureka   
eureka.instance.hostname=localhost

management.health.circuitbreakers.enabled=true
#actuator settings
management.endpoints.web.exposure.include=*
management.endpoint.health.show-details=always

resilience4j.circuitbreaker.instances.BillingServiceCapture.registerHealthIndicator=true
resilience4j.circuitbreaker.instances.BillingServiceCapture.eventConsumerBufferSize=10
resilience4j.circuitbreaker.instances.BillingServiceCapture.failureRateThreshold=20
resilience4j.circuitbreaker.instances.BillingServiceCapture.minimumNumberOfCalls=5
resilience4j.circuitbreaker.instances.BillingServiceCapture.automaticTransitionFromOpenToHalfOpenEnabled=true
resilience4j.circuitbreaker.instances.BillingServiceCapture.waitDurationInOpenState=5s
resilience4j.circuitbreaker.instances.BillingServiceCapture.permittedNumberOfCallsInHalfOpenState=3 
resilience4j.circuitbreaker.instances.BillingServiceCapture.slidingWindowSize=10
resilience4j.circuitbreaker.instances.BillingServiceCapture.slidingWindowType=COUNT_BASED

但是，如果我發送 Get Request: localhost:8765/billing/hi 我會收到 Hello Khushboo 消息。

但是當我停止 BillingService 微服務並再次發送相同的請求時，不會調用斷路器方法。

此外，在訪問 Actuator Health 狀態時，我沒有在我應該看到的狀態日志中看到斷路器信息。

任何見解將不勝感激。

謝謝。

Answer 1

回退方法應傳遞 Exception 參數：

public String hiFallback(Exception e) {
    return "Hello Khushboo FallBack!";
}