Declarative Restclient Interfaces not compatible with the Property Placeholder in Spring Boot 4.0

[yigsvnsla]

Hi team,

I noticed that property placeholders (${...}) are not being resolved inside @HttpExchange(url = "...") when using declarative RestClient interfaces in Spring Boot 4.0.

Even though placeholders work correctly in other annotations (e.g., @JmsListener(destination = "${mq.config.requestQueue}")), the following fails:

@HttpExchange(url = "${provider.auth.url}")
public interface AuthClient { ... }

This results in:

java.lang.IllegalArgumentException: Map has no value for 'provider.auth.url'
    at org.springframework.web.util.UriComponents$MapTemplateVariables.getValue(UriComponents.java:336)
    ...

Is placeholder resolution currently supported for @HttpExchange and @ImportHttpServices?
Or is this a missing feature that will be added later?

Thanks!