handler.java

@Component
public class StoreHandler {
  private final StoreManagementUseCase useCase;

  @Autowired
  public StoreHandler(StoreManagementUseCase useCase) {
    this.useCase = useCase;
  }

  public Mono<ServerResponse> addStore(ServerRequest request) {
    return request.bodyToMono(StorePresenter.class)
      .flatMap(storePresenter -> ServerResponse.status(HttpStatus.CREATED)
        .contentType(MediaType.APPLICATION_JSON)
        .body(useCase.addStore(storePresenter.toDomain()).map(StorePresenter::fromDomain), StorePresenter.class));
  }
}