Feign Client Error Handling

Question

I am using Feign Client,

I have a Location service. So I created a client for my LocationService using FeignClient.

@FeignClient(url=\"http://localho         


        

Answer 1

You could use a feign ErrorDecoder for exception handling. Below is the url for your reference.

https://github.com/OpenFeign/feign/wiki/Custom-error-handling

Example :

public class MyErrorDecoder implements ErrorDecoder {

    private final ErrorDecoder defaultErrorDecoder = new Default();

    @Override
    public Exception decode(String methodKey, Response response) {
        if (response.status() >= 400 && response.status() <= 499) {
            return new MyBadRequestException();
        }
        return defaultErrorDecoder.decode(methodKey, response);
    }

}

To get this ErrorDecoder you need create a bean for it as below :

@Bean
public MyErrorDecoder myErrorDecoder() {
  return new MyErrorDecoder();
}

Answer 2

You can define a fallback client that is called when an exception like timeout or connection refused comes up:

@FeignClient(url="http://localhost:9003/location/v1", name="location-service", fallback=LocationFallbackClient.class)
public interface LocationControllerVOneClient {
    ...
}

LocationFallbackClient must implement LocationControllerVOneClient.