RestClient not evaluating API annotations in class hierarchy

[georgleber]

Describe the bug
In a RestClient implementation the additional API annotations in the class hierarchy are not evaluated. So that it is needed to duplicate the annotation on the RestClient interface.

Expected behavior
I would expect that annotations are evaluated in the class hierarchy, like it is done in the JAX-RS resource implementation, where e.g. the @Path annotation can be used in an interface.

Actual behavior
Annotations in the class hierarchy are ignored. The @Path annotation must be explicitly set on the interface which is annotated with @RegisterRestClient.

To Reproduce
https://github.com/GeorgHenkel/quarkus-restclient-error

1. Start modules impl and service with ./mvnw quarkus:dev
2. Request URL http://0.0.0.0:8080/test/myName -> Returns 404
3. Request URL http://0.0.0.0:8080/test/with-path/myName -> Returns 200 with json body: { "name": "myName" }

Environment (please complete the following information):

• Output of uname -a or ver:

Darwin MacBook-Pro.local 19.6.0 Darwin Kernel Version 19.6.0: Thu Oct 29 22:56:45 PDT 2020; root:xnu- 6153.141.2.2~1/RELEASE_X86_64 x86_64

• Output of java -version:

openjdk version "11.0.8" 2020-07-14
OpenJDK Runtime Environment AdoptOpenJDK (build 11.0.8+10)
OpenJDK 64-Bit Server VM AdoptOpenJDK (build 11.0.8+10, mixed mode)

• Quarkus version or git rev:

1.9.2.Final

• Build tool (ie. output of mvnw --version or gradlew --version):

Apache Maven 3.6.3 (cecedd343002696d0abb50b32b541b8a6ba2883f)
Maven home: /Users/georgleber/.m2/wrapper/dists/apache-maven-3.6.3-bin/1iopthnavndlasol9gbrbg6bf2/apache-maven-3.6.3
Java version: 11.0.8, vendor: AdoptOpenJDK, runtime: /Users/georgleber/.sdkman/candidates/java/11.0.8.hs-adpt
Default locale: de_DE, platform encoding: UTF-8
OS name: "mac os x", version: "10.15.7", arch: "x86_64", family: "mac"

[rquinio]

Linking to eclipse/microprofile-rest-client#262, as it appears to be an issue in the spec.

[quarkus-bot]

/cc @Sgitario(rest-client), @cescoffier(rest-client), @geoand(rest-client)

[gsmet]

From the discussion I can see in the MP issue, it seems to be a behavior mandated by spec so I will close this one.

[geoand]

Is this still an issue with quarkus-rest-client-reactive?

[geoand]

👌