Let’s say I have a quarkus resource like the following:

@ApplicationScoped
@Path("/some")
public class SomeResource {
    @Inject
    SomeService service;

    @POST
    @Path("/path")
    @Produces(MediaType.SERVER_SENT_EVENTS)
    @Consumes(MediaType.APPLICATION_JSON)
    @RestStreamElementType(MediaType.APPLICATION_JSON)
    public Multi<SomeResponse> streamResponses(@Body SomeRequest someRequest) {
        return service.stream(someRequest);
    }
}

and the SomeRequest class can contain a flag called stream, which indicates if the response should be streamed or returned as bulk json request. The service already has the capability to return bulk json. How can i return bulk responses or stream responses on the same route depending on the stream flag?

The resource with the additional endpoint should look something like this:

@ApplicationScoped
@Path("/some")
public class SomeResource {
    @Inject
    SomeService service;

    @POST
    @Path("/path")
    @Produces(MediaType.SERVER_SENT_EVENTS)
    @Consumes(MediaType.APPLICATION_JSON)
    @RestStreamElementType(MediaType.APPLICATION_JSON)
    public Multi<SomeResponse> streamResponses(@Body SomeRequest someRequest) {
        return service.stream(someRequest);
    }
    
    @POST
    @Path("/path")
    @Produces(MediaType.APPLICATION_JSON)
    @Consumes(MediaType.APPLICATION_JSON)
    public SomeResponse streamResponses(@Body SomeRequest someRequest) {
        return service.chat(someRequest);
    }

}

I have tried to use Reactive Routes, but could not find out how to conditionally set the return type correctely. Using a Uni resulted in the wrong content-type of the response