Java 如何在play framework 2.6中从CompletionStage获取json对象

我需要从以下代码中获取json对象

JsonObject request = HttpRequestProcessor.getJsonFromRequest(request().body());
    ActorRef actorRef = ActorHandler.getActorReferenceOfParameterisedActor(AControllerTasksExecutor.class,
            new AControllersTaskContext(FactoryType.USER_COMMAND_FACTORY, ObjectType.PURCHASE_SHARES));

            CompletionStage<JsonObject> promise = PromiseHandler.getPromise(actorRef, request, 7000);

    JsonObject response = null;

    Result result = null;
    try {
        response =  promise.get(70000);
        log.debug(">> response object >> {}", response);
        result = PlayResultHandler.getResult(response.get("status").getAsInt(), JsonHandler.parseJsonIntoString(response));

    } catch (Exception e) {

}

public class PromiseHandler {


private final static Logger log = LoggerFactory.getLogger(PromiseHandler.class);

public static <B> CompletionStage<B> getPromise(ActorRef actorRef, Object msg, int time) {

    log.debug("Preparing promise. ActorRef: {}, Message-Object: {}, time: {}", actorRef, msg, time);
    CompletionStagev<B> prom = CompletionStage.wrap(ask(actorRef, msg, time)).map(new Function<Object, B>() {

        @SuppressWarnings("unchecked")
        public B apply(Object response) {
            log.debug("In Apply method. Returning Response.  Response-object: {}",response);
            return (B) response;
        }

    });

    return prom;
}

response =  promise.get(70000);

我怎样才能得到我正在使用的json对象

response =  promise.get(70000);

但它给

response =  promise.get(70000);

cannot find symbol
[error]   symbol:   method get(int)
[error]   location: variable promise of type java.util.concurrent.CompletionStage<com.google.gson.JsonObject>
[error]             response =  promise.get(70000);

找不到符号
[错误]符号：方法get（int）
[错误]位置：java.util.concurrent.CompletionStage类型的变量承诺
[error]response=promise.get（70000）；

---

我怎样才能做到这一点？

你能用你试图解析的JSON的摘录更新这个问题吗？这是我得到的编译时错误，在解析运行时发生的JSON之前，在我看来这行代码没有完成

ActorRef ActorRef=ActorHandler.getActorReference

，你能发布全文吗？我编辑了代码和AcontrollerTask actor，你能检查你的promise对象是否为null吗？你能用你试图解析的JSON的摘录更新这个问题吗？这是我得到的编译时错误，，在分析运行时发生的json之前，我觉得这行代码没有完成

ActorRef-ActorRef=ActorHandler.getActorReference

，您可以发布完整的行吗？我已经编辑了代码和AcontrollerTask actor，您可以检查您的promise对象是否为null吗？

response =  promise.get(70000);