Spring Cloud Openfeign Inject FeignClient type into Configuration context

when {FeignClientFactoryBean#configureUsingConfiguration()} building feignClient with config, config can get the target type reference.

@FeignClient(configuration = CommonConfig .class)
public interface SomeFeign {}

public class CommonConfig {
@bean
public FallbackFactory fallbackFactory(Target<?> target) {
Assert.isTrue(target.type() == SomeFeign.class);
return new CommonFeignFallbackFactory();
}
@bean
public ErrorDecoder errorDecoder(Decoder decoder, Target<?> target) {
return RemoteErrorDecoder.of(decoder, target.type());
}
}

Comment From: OlgaMaciaszek

Hello, @honhimW, please provide a more detailed description of the issue including the steps to reproduce, the expected result and the actual result. Also, please provide a minimal, complete, verifiable example that reproduces the issue.

Comment From: honhimW

I'm just wondering is there any existing way to do such thing, It means i can get the target feignclient type that refer to current configuration class. Exceptions declared on method are useful for ErrorDecoder.

public class CommonFeignConfig {

  protected static final String FEIGN_CLIENT_FACTORY_BEAN_CLASS_NAME = "org.springframework.cloud.openfeign.FeignClientFactoryBean";
  protected static final String FEIGN_CONTEXT_PREFIX = "FeignContext-";

  @Autowired
  private ApplicationContext applicationContext;

  @Bean
  private TargetRef targetRef() throws Exception {
    Class<?> feignClientFactoryBean = Class
      .forName(FEIGN_CLIENT_FACTORY_BEAN_CLASS_NAME);
    Method getTypeMethod = feignClientFactoryBean.getDeclaredMethod("getType");
    Method getNameMethod = feignClientFactoryBean.getDeclaredMethod("getName");
    Method getContextIdMethod = feignClientFactoryBean.getDeclaredMethod("getContextId");
    Method getUrlMethod = feignClientFactoryBean.getDeclaredMethod("getUrl");
    Method getPathMethod = feignClientFactoryBean.getDeclaredMethod("getPath");
    Method getFallbackMethod = feignClientFactoryBean.getDeclaredMethod("getFallback");
    Method getFallbackFactoryMethod = feignClientFactoryBean
      .getDeclaredMethod("getFallbackFactory");
    ReflectionUtils.makeAccessible(getTypeMethod);
    ReflectionUtils.makeAccessible(getNameMethod);
    ReflectionUtils.makeAccessible(getContextIdMethod);
    ReflectionUtils.makeAccessible(getUrlMethod);
    ReflectionUtils.makeAccessible(getPathMethod);
    ReflectionUtils.makeAccessible(getFallbackMethod);
    ReflectionUtils.makeAccessible(getFallbackFactoryMethod);
    TargetRef targetRef = new TargetRef();
    Map<String, ?> beansMap = Objects.requireNonNull(applicationContext.getParent())
      .getBeansOfType(feignClientFactoryBean);
    for (Object o : beansMap.values()) {
      String contextId = (String) getContextIdMethod.invoke(o);
      if (StringUtils
        .equals(contextId, applicationContext.getDisplayName().replace(FEIGN_CONTEXT_PREFIX, ""))) {
        Class<?> feignType = (Class<?>) getTypeMethod.invoke(o);
        targetRef.setType(feignType);
        targetRef.setTypeName(feignType.getName());
        targetRef.setName((String) getNameMethod.invoke(o));
        targetRef.setContextId(contextId);
        targetRef.setUrl((String) getUrlMethod.invoke(o));
        targetRef.setPath((String) getPathMethod.invoke(o));
        targetRef.setFallback((Class<?>) getFallbackMethod.invoke(o));
        targetRef.setFallbackFactory((Class<?>) getFallbackFactoryMethod.invoke(o));
        return targetRef;
      }
    }
    return targetRef;
  }
}

Comment From: OlgaMaciaszek

It is not a feature we are planning to implement. Please specify the use-cases where you would use something like that.

Comment From: spring-cloud-issues

If you would like us to look at this issue, please provide the requested information. If the information is not provided within the next 7 days this issue will be closed.

Comment From: spring-cloud-issues

Closing due to lack of requested feedback. If you would like us to look at this issue, please provide the requested information and we will re-open the issue.