Question

我正在使用播放框架2.4，然后由于某种原因我不得不将其升级到2.6版，然后我的代码开始出现编译时错误这是我得到的错误

/myproject/app/controllers/UserGeneralController.java:44: cannot find symbol
[error]   symbol:   class Promise
[error]   location: class controllers.UserGeneralController
[error]         Promise<JsonObject> promise = PromiseHandler.getPromise(actorRef, request, 60000);

他们从link说到

将所有返回F.Promise的代码更改为返回CompletionStage。

所以我更改了代码这是破旧的代码

Promise<JsonObject> promise = PromiseHandler.getPromise(actorRef, request, 60000);

        JsonObject response = null;

        Result result = null;
        try {

            response = promise.get(60000);
            log.debug("saveUserAccountInfo: >> response object >> {}", response);
            result = PlayResultHandler.getResult(response.get("status").getAsInt(),
                    JsonHandler.parseJsonIntoString(response));

        } catch (Exception e) {

}

这是我在play 2.6的代码中所做的更改

import java.util.concurrent.CompletionStage;

CompletionStage<JsonObject> promise = PromiseHandler.getPromise(actorRef, request, 6000);

Result result = null;
        try {
            response = ((JsonObject) promise.get(60000));
            log.debug(">> response object >> {}", response);
            result = PlayResultHandler.getResult(response.get("status").getAsInt(), JsonHandler.parseJsonIntoString(response));

        } catch (Exception e) {
}

此后，我在

上出错

response = promise.get(60000);

/myproject/app/controllers/UserGenralController.java:42: 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(60000);

在获得帮助之前，如何从中获取json对象

如何在Play框架2.6中的CompletionStage中使用promise.get方法

0 个答案: