在 GWT 异步回调中，如何在 onSuccess 中处理相同的 return 类型？

Question

如果我在服务中有两个 boolean 方法，我如何确保 onSuccess 方法处理返回 boolean 的正确方法？

例如，在onSuccess方法中我说：

if (result instanceof Boolean) {};

有什么方法可以区分返回布尔值的服务方法吗？否则无法保证正确的代码将在我的 onSuccess 方法中执行，就好像结果是 boolean 如果我的两个 boolean 服务方法中的任何一个被调用它就会执行。

这是我面临的问题的示例：

private class DefaultCallback implements AsyncCallback
        {
        @Override
        public void onFailure(Throwable caught)
            {
            mainGUI.getServerResponseLabel().setStyleName("serverResponseLabelError");
            mainGUI.getServerResponseLabel().setHTML("An error occurred while "
                    + "attempting to contact the server. Please check your network " + "connection and try again.");
            }

        @Override
        public void onSuccess(Object result)
            {
            if (result instanceof Boolean)
                { 
                //
                I have two methods that return a boolean here, 
                so this block will execute no matter which one is called;
                for one method I want to display a GUI windows saying "Upload complete",          
                and for another, create an excel spreadsheet. But the boolean value of one method won't be relevant to the other

Answer 1

有很多灰色区域，但请耐心等待：在 SomethingRPCService.java

boolean isA();
boolean isB();

在SomethingRPCServiceAsync.java

void isA(AsyncCallback<Boolean> callback);
void isB(AsyncCallback<Boolean> callback);

在你的 activity

somethingService.isA(new AsyncCallback<Boolean>() {
        @Override
        public void onSuccessImpl(final Boolean response) {
            //will be executed on success of THIS call
        }
        @Override
        public void onFailure(final Throwable caught) {
            // not relevant here
        }
});

somethingService.isB(new AsyncCallback<Boolean>() {
        @Override
        public void onSuccessImpl(final Boolean response) {
            //will be executed on success of THIS call
        }
        @Override
        public void onFailure(final Throwable caught) {
            // not relevant here
        }
});

您可以（必须？）实际输入您的 return

编辑：通过你的例子，我可以看得更清楚一些；你的回调不应该相同，你应该重写它所以代码不一样，因为它不是

在 GWT 异步回调中，如何在 onSuccess 中处理相同的 return 类型？

In a GWT asynchronous callback, how can I handle the same return types in onSuccess?

java

gwt

rpc