Netflix Feign - 通过微服务传播状态和异常

Java
@FeignClient(name = "example-service")
public interface ExampleServiceClient {
    @RequestMapping(value = "/example-api", method = RequestMethod.GET)
    ResponseEntity<String> getExampleData();
}

Java
@RestController
public class ExampleController {
    @Autowired
    private ExampleServiceClient exampleServiceClient;
    @RequestMapping(value = "/example", method = RequestMethod.GET)
    public String getExampleData() {
        ResponseEntity<String> response = exampleServiceClient.getExampleData();
        HttpStatus status = response.getStatusCode();
        String responseBody = response.getBody();
        if (status.is2xxSuccessful()) {
            // 处理成功的情况
            return responseBody;
        } else if (status.is4xxClientError()) {
            // 处理客户端错误的情况
            throw new ClientException(responseBody);
        } else if (status.is5xxServerError()) {
            // 处理服务端错误的情况
            throw new ServerException(responseBody);
        } else {
            // 处理其他情况
            throw new UnknownException(responseBody);
        }
    }
}