GWT Tomcat问题到RPC调用 [英] GWT Tomcat problem to RPC call

问题描述

当我将war文件部署到TOMCAT（tomcat / webapps / ROOT / war）时，GWT RPC调用似乎不起作用。

它给我一个错误：

请求的资源
（/ war / myproject / call）不是
可用。

如果我改变目录结构，然后直接部署war内容（不是war目录本身），比如（tomcat / webapps / ROOT / project.html，project.css，project等），那么它就可以工作。

继续？

我认为可能有问题：

  < servlet的> 
< servlet-name> callServlet< / servlet-name> 
< servlet-class> com.myproject.server.dao.Call< / servlet-class> 
< / servlet> 
 
< servlet-mapping> 
< servlet-name> callServlet< / servlet-name> 
< url-pattern> / myproject / call< / url-pattern> 
< / servlet-mapping> 
  

解决方案

事情是，单个Tomcat服务器可以有多个部署的应用程序，每个应用程序都位于其所谓的上下文中。应用程序部署在 webapps 文件夹中，每个文件夹映射到一个 context ，而 ROOT 文件夹是默认的（无上下文）。

要访问Tomcat上的应用程序，您需要在URL后面指定 context 。例如，如果您在 webapps / Test 文件夹中有一个应用程序（上下文） Test ，您可以像这样访问它：

  http：// localhost：8080 / Test 
  

但是 ROOT 文件夹中的应用程序没有上下文，只需转到 localhost：8080 。这是你的情况。 Tomcat直接在 ROOT 文件夹中查找应用程序，但是您的应用程序位于 ROOT / war 文件夹中。换句话说，RPC调用期望 myproject 文件夹位于 ROOT 文件夹下，而不在<$ c下$ c> ROOT / war 文件夹。这就是为什么它不起作用。

如果你仍然希望在 war 文件夹> ROOT 文件夹，您必须将 url-pattern 更改为 / war / myProject / call 。

GWT RPC call don't seems to work when i deploy my war file to TOMCAT (tomcat/webapps/ROOT/war).

It gives me an error:

The requested resource (/war/myproject/call) is not available.

If i change the directory structure and then deploy directly war contents (not war directory itself), like (tomcat/webapps/ROOT/project.html, project.css, project, etc...) then it works.

Can someone please explain me whats going on?

I think there might a problem at:

<servlet>
<servlet-name>callServlet</servlet-name>
<servlet-class>com.myproject.server.dao.Call</servlet-class>
</servlet>

<servlet-mapping>
<servlet-name>callServlet</servlet-name>
<url-pattern>/myproject/call</url-pattern>
</servlet-mapping>

解决方案

The thing is that a single Tomcat server can have multiple applications deployed, each in its so-called context. The applications are deployed in the webapps folder and each folder is mapped to one context, while the ROOT folder is the default (no-context).

To access an application on Tomcat, you specify the context after the URL. For example if you had an application (context) Test in webapps/Test folder, you would access it like this:

http://localhost:8080/Test

But applications in the ROOT folder have no context and are accessed by simply going to localhost:8080. And this is your case. Tomcat is looking for you application directly in the ROOT folder but you have your app in the ROOT/war folder. In other words, the RPC call expects the myproject folder to be under the ROOT folder and not under the ROOT/war folder. That's why it's not working.

If you still wanted to have your war folder within the ROOT folder, you would have to change the url-pattern to /war/myProject/call.

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