Spring Cloud + Ribbon + Eureka (service registry) and Relative URLs (rels)

Question

If I do a call to the autowired RestTemplate it works like a charm:
GET on http://localhost:18990/microservice2/ (service registry):

{
    "_links":  {
        "hl:echo":  { "href": "http://localhost:18989/microservice2/echo?echoMessage={echoMessage}",  "templated": true },
        "curies": 
        [ {
                        "href": "/microservice2/generated-docs/api-guide.html#resources-{rel}",
                        "name": "hl",
                        "templated": true
            }
        ]
    }
}

From micro service 1(calling micro service 2 using the RestTemplate):

@Autowired
private RestTemplate restTemplate;
URI targetUrl = UriComponentsBuilder.fromUriString("http://microservice2")
    .path("/microservice2/echo")
    .queryParam("echoMessage", "echoMessage")
    .build()
    .toUri();
EchoMessageResource response = restTemplate.getForObject(targetUrl, EchoMessageResource.class);

OK

Ribbon does use Eureka to get to the real server behind the scenes.

If I add a rel then it does NOT work. I get a 404.
FROM:

URI targetUrl = UriComponentsBuilder.fromUriString("http://microservice2")
    .path("/microservice2/echo")
    .queryParam("echoMessage", "echoMessage")
    .build()
    .toUri();

TO:

URI targetUrl = UriComponentsBuilder.fromUriString("http://microservice2")
    .path("/microservice2/hl:echo")
    .queryParam("echoMessage", "echoMessage")
    .build()
    .toUri();
EchoMessageResource response = restTemplate.getForObject(targetUrl, EchoMessageResource.class);

KO 404

What is the way to use a rel ? In my example hl:echo.

Answer 1

OK. As The Spring Hateoas Client side support documentation does not make any reference to Ribbon, I make the assumption that Spring Hateoas does not support Ribbon at all.