gwt - 如何解决在 GWT 中等待 RPC 响应的问题？

Question

我知道 RPC 是异步的，但是如何以其他方式（除了等待响应）来解决这个问题：

public static String htsl(String sentence)
{
    final DataBaseAsync db = GWT.create(DataBase.class);
    String cookie = staticContent.getCookie("ll");
    String shortcut = cookie.split("/")[1];
    final String[] lala = new String[1];
    database.getTranslated(sentence, shortcut, new AsyncCallback<String>() {



        @Override
        public void onSuccess(String result) {
            lala[0]=result;

            //this result I want to return in static function htsl... ?

        }

        @Override
        public void onFailure(Throwable caught) {
            // TODO Auto-generated method stub

        }


    });
    //here I have blank result, because RPC is slower than te return.. 
    And i have always blank result
    return lala[0];

}

我知道这不好，但是..如果这没有可行的解决方案，如何等待响应？

Answer 1

使htsl异步（非阻塞，即响应的回调而不是返回值）

Answer 2

Do it like so:

public static String htsl(String sentence, AsyncCallback<String> myCallback) {
    final DataBaseAsync db = GWT.create(DataBase.class);
    String cookie = staticContent.getCookie("ll");
    String shortcut = cookie.split("/")[1];
    final String[] lala = new String[1];

    database.getTranslated(sentence, shortcut, myCallback);
}

Then you let some other class implement AsyncCallback, pass it as the myCallback argument to the htsl method and Bob's your uncle.