GWT编译的一些细微之处 - “gwt模块可能需要（重新）编译”。 [英] Some subtlety of GWT compilation - "gwt module may need to be (re)compiled."

问题描述

我正在向GAE部署应用程序。我在Eclipse中有一个单独的项目设置，包含三个独立的GWT模块，每个模块都有自己的HTML页面，入口点等等。它们共享很多代码。

当我将应用程序部署到appengine，两个模块工作正常。我可以完美地访问他们的HTML页面。第三个给我的错误，gwt模块'xyz'可能需要（重新）编译。我曾尝试重新编译和重新部署两次，但都没有成功，并且没有任何关于前进的想法。

有关此问题的其他线程指向gwt.codeserver参数， ，如果我添加了这个参数，坏模块会运行......但它似乎在开发模式下运行！如果这是真的，我有点担心，因为我不想向任何人提供开发模式代码。

任何建议都会受到欢迎 - 我的工作基本上完全停滞在这个问题上。

解决方案

我找到了自己的答案：在我的情况下，错误不是由缺少 gwt.codesvr 参数引起的（如同所有其他情况我在网上查到）。相反，在我的模块定义文件 gwt.xml 文件中添加的模块重命名属性导致混淆。我会重新计算整个故事，以帮助其他人了解更多信息。

1. 我创建了一个新模块和一个新的HTML页面。


2. 模块名称为 com.reallylong.and.unwieldy ，我的HTML页面从 com.reallylong.and.unwieldy / com.reallylong.and.unwieldy.nocache.js 。


3. 后来，我变得聪明并使用 rename-to 属性重命名
   com.reallylong.and.unwieldy 改为short，不改变我的HTML代码。
   我忘了。
   
   $ b $这几天没有影响我，因为我认为eclipse足够聪明，可以重新编译文件或其他东西。谁知道。我怀疑 gwt.codesvr 参数实际上启用了这种模糊行为，从dev模式而不是从js文件加载代码。
   
   
   

   最终，修正很简单：我更改了我的HTML文件，以便js从 short / short.nocache.js 中拉出。
   它的工作！
   呜呼！

   
   

   I'm deploying an app to GAE. I have a single project setup in Eclipse, with three separate GWT modules, each with its own HTML page, entry point, etc. They share a lot of code.

   When I deploy the app to appengine, TWO of the modules work fine. I can access their HTML pages perfectly. The third gives me the error that "gwt module 'xyz' may need to be (re)compiled." I have tried recompiling and redeploying twice, to no avail, and have no ideas about moving forward.

   Other threads about this problem point to the gwt.codeserver argument, and indeed, if I add that argument, the bad module runs... but it seems to be running in dev mode! If this is true, I'm a little bit apalled, since I don't want to serve dev mode code to anyone.

   Any suggestions would be welcome - my work is basically entirely stalled on this issue.

   解决方案

   I've found my own answer: in my case, the error was not being caused by a missing gwt.codesvr argument (as in all other cases I found referenced online). Instead, a module rename-to attribute I added in my module definition gwt.xml file caused a mixup. I'll recount the whole story in case it helps others understand more.

   1. I created a new module and a new HTML page.
   2. The module's name was com.reallylong.and.unwieldy, and my HTML page pulled in the javascript from com.reallylong.and.unwieldy/com.reallylong.and.unwieldy.nocache.js.
   3. Later, I got smart and used the rename-to attribute to rename com.reallylong.and.unwieldy to "short," not changing my HTML code. I forgot.

   This didn't affect me for several days, since I guess eclipse is smart enough to recompile both files, or something. Who knows. I suspect the gwt.codesvr argument was actually enabling this obscuring behavior, loading the code from dev mode instead of from the js file.

   Ultimately, the fix was simple: I changed my HTML file so that the js was being pulled from short/short.nocache.js. And it worked! Woohoo!

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