播放框架：返回CompletableFuture <completablefuture <result>＆gt;？

Question

是否可以将CompletableFuture<CompletableFuture<Result>>返回到Play框架？

以下是我的行动代码：

@BodyParser.Of(BodyParser.Json.class)
public CompletableFuture<CompletableFuture<Result>> addPageGroupMedia(){
    JsonNode payloadJson = request().body().asJson();
    PageGroupPayload payload = Json.fromJson(payloadJson, PageGroupPayload.class);
    logger.debug("PageGroupMediaPayload :: " + payload);
    Response res = new Response();
    CompletableFuture<CompletableFuture<Boolean>> cf = mediaLibraryService.addPageGroupMedia(payload);

    return cf.thenApply(data -> data.handle((d, e) -> {
        if (e != null) {
            res.setStatus(ERROR);
            logger.error("Failed to add page group media - : {}", payload, e);
        } else {
            res.setStatus(SUCCESS);
            res.setData(data);
        }
        logger.debug("res :: " + res);
        return ok(Json.toJson(res));
    }));
}

执行此操作时出现以下错误：

Cannot use a method returning java.util.concurrent.CompletableFuture[java.util.concurrent.CompletableFuture[play.mvc.Result]] as a Handler for requests