GWT - 我应该在哪里使用code分裂，而使用的地方/活动/映射器？

问题描述

芯是指在最初的片加载的应用的

"core" refers to the initial piece of the application that is loaded.

• 为了绑定URL的地方，GWT使用 PlaceTokenizer＆LT; p延伸广场＆GT; 。当加载从URL的应用程序，它调用方法点getPlace（字符串标记）来检索调用的地方的新实例。

• In order to bind url to places, GWT uses PlaceTokenizer<P extends Place>. When loading the application from the url, it calls the method P getPlace(String token) to retrieve a new instance of the place to call.

由于code分裂的异步性，我不能创造这种方法在 runAsync 的地方。所以，我必须把全部我的核心应用程序的地方。

due to the asynchronous nature of code splitting, I can't create the place inside a runAsync in this method. So I have to put all the places of my app in the core.

要链接的地方活动，GWT将活动getActivity（地点的地方）（从 com.google.gwt.activity.shared .ActivityMapper ）来检索活动的新实例。

To link places to activity, GWT callsActivity getActivity(Place place) (from com.google.gwt.activity.shared.ActivityMapper) to retrieve a new instance of the activity.

再一次，我必须把全部我的活动的核心。

Once again, i have to put all my activities in the core.

下面是我想尝试什么：写一个自定义的 com.google.gwt.place.shared.Delegate 是

Here's what I want to try: Write a custom com.google.gwt.place.shared.Delegate that

在 PlaceChangeRequestEvent
• 绑定本身。如果未加载对应requestedPlace的AppPiece，它调用 event.setWarning（NEED_TO_LOAD_MODULE）


• 在确认（字符串消息）方法的总是返回假消息等于当 NEED_TO_LOAD_MODULE （所以它不会打扰用户），并通过 RunAsync 。


• 一旦模块加载，请拨打 GOTO（requestedPlace）

• bind itself on PlaceChangeRequestEvent. If the AppPiece corresponding to the requestedPlace isn't loaded, it calls event.setWarning(NEED_TO_LOAD_MODULE)
• in the confirm(String message) method, always return false when the message equals NEED_TO_LOAD_MODULE (so it doesn't bother the user), and load the module via RunAsync.
• Once the module is loaded, call goTo(requestedPlace)

我的应用程序的每个AppPiece包含了一堆activies和相应的意见。由于映射器只被调用时， PlaceChangeEvent 被激发，我可以生成我活动的新实例通过 AppPiece.getSomeActivityInstance（）。

Each AppPiece of my application contains a bunch of activies and the corresponding views. Since the mappers are only called when PlaceChangeEventis fired, i could generate a new instance of my activity via AppPiece.getSomeActivityInstance().

我是pretty肯定这会工作，但什么打扰我是

I'm pretty sure this will work, but what bother me is that

• 查找至极AppPiece加载取决于requestedPlace会强迫我写code，这将是非常相似，我的映射器


• 我想有我的相应AppPiece
里面的地方

• 重写代表用于此目的是棘手的，我正在寻找一个更好的解决方案

• Finding wich AppPiece to load depending on the requestedPlace will force me to write code that will be very similar to my mappers
• I would like to have my places inside the corresponding AppPiece
• Overriding Delegate for this purpose is tricky, and I'm looking for a better solution

推荐答案

您不必把所有的活动的核心的（如你称呼它）：当一个活动实例检索同步，它是允许的开始异步。这就是你把你的 GWT.runAsync 电话。

You don't have to put all your activities in the core (as you call it): while an Activity instance is retrieved synchronously, it's allowed to start asynchronously. This is where you'd put your GWT.runAsync call.

请参阅和https://groups.google.com/d/topic/google-web-toolkit/8_P_d4aT-0E/discussion

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