Using @RequestLine with Feign

问题

I have a working Feign interface defined as:

@FeignClient("content-link-service")
public interface ContentLinkServiceClient {

    @RequestMapping(method = RequestMethod.GET, value = "/{trackid}/links")
    List<Link> getLinksForTrack(@PathVariable("trackid") Long trackId);

}

If I change this to use @RequestLine

@FeignClient("content-link-service")
public interface ContentLinkServiceClient {

    @RequestLine("GET /{trackid}/links")
    List<Link> getLinksForTrack(@Param("trackid") Long trackId);

}

I get the exception

Caused by: java.lang.IllegalStateException: Method getLinksForTrack not annotated with HTTP method type (ex. GET, POST)

Any ideas why?

回答1:

I wouldn't expect this to work.

@RequestLine is a core Feign annotation, but you are using the Spring Cloud @FeignClient which uses Spring MVC annotations.

回答2:

Spring has created their own Feign Contract to allow you to use Spring's @RequestMapping annotations instead of Feigns. You can disable this behavior by including a bean of type feign.Contract.Default in your application context.

If you're using spring-boot (or anything using Java config), including this in an @Configuration class should re-enable Feign's annotations:

@Bean
public Contract useFeignAnnotations() {
    return new Contract.Default();
}

来源：https://stackoverflow.com/questions/29985205/using-requestline-with-feign