Getting header value from a config property using @ClientHeaderParam is not working

[zak905]

After trying on SO, I wanted to revert back here, before creating an issue.

I am trying to get a header value from the config into the Rest(easy) client using the @ClientHeaderParam annotation as described here https://quarkus.io/guides/rest-client-reactive#custom-headers-support, unfortunately it does not work out. The value is sent as-is, rather than replaced with the corresponding config property
Here is roughly what I am doing

@RegisterRestClient
@ClientHeaderParam(name = "Key", value = "${api-key}")
public interface MyClient {

  @POST
  @Path("/api")
  @Consumes(MediaType.APPLICATION_OCTET_STREAM)
  @Produces(MediaType.APPLICATION_JSON)
  Response call(InputStream image);
}

When I invoke the call method and check the request, I see that the Key header has ${api-key} as value, and not the value I have in application.properties for api-key.

According to a suggestion from a SO answer, this seems like a bug, and it normally it should be working. Is this really a bug ? or am I missing on something ?

[gsmet]

You are using the quarkus-rest-client-reactive extension, right? Not the quarkus-rest-client one?

[zak905]

Yes indeed that was the issue, my bad. Although, I am not using any reactive feature, I should have included the reactive client, works well now, thanks a lot!

[gsmet]

FWIW, we are making RESTEasy Reactive the default REST layer for 2.8. It works equally well for blocking or reactive workloads.

[zak905]

Good to know. Thanks