Support registering a ClientHeadersFactory in the rest client programmatic API

[vsevel]

Description

It would be useful to be able to register client headers factories through the programmatic API. Example :

@Inject
RequestUUIDHeaderFactory  factory;
...
MyService myService = RestClientBuilder.newBuilder()
            .baseUri(URI.create("https://stage.code.quarkus.io/api"))
            .clientHeadersFactory(factory)
            .build(MyService.class);

Using a programmatic rest client is one solution when using a rest interface coming from a jar external to the application (most likely coming from non quarkus applications). In that case it is not possible to add additional quarkus annotations, such as @RegisterRestClient or @RegisterClientHeaders.

See this zulip chat

Implementation ideas

No response

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[quarkus-bot]

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

[geoand]

Thanks for reporting!

[geoand]

@radcortez this sounds like something that should be taken up with the spec, right?

[radcortez]

Yes, but this was requested a long time ago without considerable progress:
eclipse/microprofile-rest-client#283

Maybe we need to consider providing our own enhanced ClientBuilder API.

[geoand]

Maybe we need to consider providing our own enhanced ClientBuilder API

+1

[WesleyBlancoYuan]

+1 for external classes. In my case I have OpenAPI codegen classes and it's just a restClient but I cannot enable injection by adding annotations to it. For now I define a Quarkus client which extends the generated class, as here. A workaround, even I cannot use CompletionStage directly, but I need to supplyAsync() in the caller.

[Sgitario]

Maybe we need to consider providing our own enhanced ClientBuilder API

+1

I've created this issue #32856 for this.

[Sgitario]

#32880 should take care of this feature request.