无法使RemoteServiceRelativePath和XML工作（GWT） [英] Cannot make RemoteServiceRelativePath and XML work (GWT)
问题描述
我认为我的GTW项目的XML文件配置不合理，因为当我尝试联系远程服务时，出现此错误：访问/ myresults / compress时出现问题。原因：NOT_FOUND 。如果有人能帮助我，请在下面找到我的代码的重要部分，我认为它与RemoteServiceRelativePath和我的XML有关。
$ b 更新：当我在web.xml中更改URL-PATTERN的内容时，我仍然使用path / myresults / compress获取完全相同的消息。
$ b
CompressionService.java
package myProject.client;
import com.google.gwt.user.client.rpc.RemoteService;
import com.google.gwt.user.client.rpc.RemoteServiceRelativePath;
/ * RPC服务的客户端存根。 * /
@RemoteServiceRelativePath（compress）
public interface CompressionService extends RemoteService {
String compress（String name）throws IllegalArgumentException;
}
CompressionServiceImpl.java
package myProject.server;
导入myProject.client.CompressionService;
import com.google.gwt.user.server.rpc.RemoteServiceServlet;
/ * RPC服务的服务器端实现。 * /
public class CompressionServiceImpl extends RemoteServiceServlet实现
CompressionService {
public String compress（String input）throws IllegalArgumentException {
String output =aaaa;
返回输出;
}
}
CompressionService.java
package myProject.client;
import com.google.gwt.user.client.rpc.AsyncCallback;
/ *< code> CompressService< / code>的异步对象* /
public interface CompressionServiceAsync {
void compress（String input，AsyncCallback< String> callback）
throws IllegalArgumentException;
}
web.xml
<？xml version =1.0encoding =UTF-8？>
<！DOCTYPE web-app
PUBLIC - // Sun Microsystems，Inc. //DTD Web Application 2.3 // EN
http://java.sun.com/ DTD /网络app_2_3.dtd>
< web-app>
< servlet>
< servlet-name> compressionService< / servlet-name>
< servlet-class> myProject.server.CompressionServiceImpl< / servlet-class>
< / servlet>
< servlet-mapping>
< servlet-name> compressionService< / servlet-name>
< url-pattern> / myresults / compress< / url-pattern>
< / servlet-mapping>
< welcome-file-list>
< welcome-file> MyResults.html< / welcome-file>
< / welcome-file-list>
< / web-app>
MyResults.gwt.xml
<？xml version =1.0encoding =UTF-8？>
< module rename-to ='myresults'>
<继承了name ='com.google.gwt.user.User'/>
<继承了name ='com.google.gwt.user.theme.clean.Clean'/>
< entry-point class ='myProject.client.MyResults'/>
< source path ='client'/>
< source path ='shared'/>
< / module>
MyResults.java
private final CompressionServiceAsync compressionService = GWT.create（CompressionService.class）;
compressionService.compress（text，new AsyncCallback< String>（）{
public void onFailure（Throwable caught）{
//向用户
下载显示RPC错误信息。的setText（caught.getMessage（）））;
}
public void onSuccess（String result）{
download.setText（result）;
}
}）;
我想你已经在思考正确的路线。问题似乎是你的 @RemoteServiceRelativePath 和web.xml url-mapping 不一致。
可能将web.xml中的servlet映射更改为以下内容将解决您的问题：
< servlet-mapping>
< servlet-name> compressionService< / servlet-name>
< url-pattern> / compress< / url-pattern>
< / servlet-mapping>
I think I have a bad configuration of my XML files for my GTW project because when I try to contact the remote service I get this error: "Problem accessing /myresults/compress. Reason: NOT_FOUND". Please find below the important pieces of my code if anyone can help me, I think it is related to RemoteServiceRelativePath and my XML.
UPDATE: When I change in web.xml the content of URL-PATTERN I still get exactly the same message with path /myresults/compress.
CompressionService.java
package myProject.client;
import com.google.gwt.user.client.rpc.RemoteService;
import com.google.gwt.user.client.rpc.RemoteServiceRelativePath;
/* The client side stub for the RPC service. */
@RemoteServiceRelativePath("compress")
public interface CompressionService extends RemoteService {
String compress(String name) throws IllegalArgumentException;
}
CompressionServiceImpl.java
package myProject.server;
import myProject.client.CompressionService;
import com.google.gwt.user.server.rpc.RemoteServiceServlet;
/* The server side implementation of the RPC service. */
public class CompressionServiceImpl extends RemoteServiceServlet implements
CompressionService {
public String compress(String input) throws IllegalArgumentException {
String output = "aaaa";
return output;
}
}
CompressionService.java
package myProject.client;
import com.google.gwt.user.client.rpc.AsyncCallback;
/* The async counterpart of <code>CompressService</code> */
public interface CompressionServiceAsync {
void compress(String input, AsyncCallback<String> callback)
throws IllegalArgumentException;
}
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE web-app
PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd">
<web-app>
<servlet>
<servlet-name>compressionService</servlet-name>
<servlet-class>myProject.server.CompressionServiceImpl</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>compressionService</servlet-name>
<url-pattern>/myresults/compress</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>MyResults.html</welcome-file>
</welcome-file-list>
</web-app>
MyResults.gwt.xml
<?xml version="1.0" encoding="UTF-8"?>
<module rename-to='myresults'>
<inherits name='com.google.gwt.user.User'/>
<inherits name='com.google.gwt.user.theme.clean.Clean'/>
<entry-point class='myProject.client.MyResults'/>
<source path='client'/>
<source path='shared'/>
</module>
MyResults.java
private final CompressionServiceAsync compressionService = GWT.create(CompressionService.class);
compressionService.compress(text, new AsyncCallback<String>() {
public void onFailure(Throwable caught) {
// Show the RPC error message to the user
download.setText(caught.getMessage()));
}
public void onSuccess(String result) {
download.setText(result);
}
});
I guess you are already thinking on the right lines. The problem seems to be that your @RemoteServiceRelativePath and web.xml url-mapping doesn't agree with each other.
Probably changing servlet-mapping in web.xml to following will fix your problem:
<servlet-mapping>
<servlet-name>compressionService</servlet-name>
<url-pattern>/compress</url-pattern>
</servlet-mapping>
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