GWT Maven Eclipse插件 - 由于重复类而编译失败

我使用安装了m2eclipse和GWT Eclipse插件的Eclipse 3.5（Galileo）。我使用gwt-maven-plugin原型创建了一个项目。我已经创建与这些类定义的RPC服务：GWT Maven Eclipse插件 - 由于重复类而编译失败

my.package.client.DataService 
my.package.client.DataServiceAsync 
my.package.server.DataServiceImpl

当运行mvn clean，目标目录被删除（如exepected）。当我运行gwt:compile gwt:run -X -e，我得到的错误：

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.0.2:compile (default-compile) on project MyProject: Compilation failure 
C:\Devel\EclipseProjects\MyProject\target\generated-sources\gwt\my\package\client\DataServiceAsync.java:[8,7] duplicate class: my.project.client.DataServiceAsync 
-> [Help 1] 
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.0.2:compile (default-compile) on project MyProject: Compilation failure 
C:\Devel\EclipseProjects\MyProject\target\generated-sources\gwt\my\package\client\DataServiceAsync.java:[8,7] duplicate class: my.project.client.DataServiceAsync 


    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:581) 
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeForkedExecutions(DefaultLifecycleExecutor.java:685) 
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:560) 
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:324) 
    at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:247) 
    at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:104) 
    at org.apache.maven.cli.MavenCli.execute(MavenCli.java:427) 
    at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:157) 
    at org.apache.maven.cli.MavenCli.main(MavenCli.java:121) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
    at java.lang.reflect.Method.invoke(Method.java:597) 
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290) 
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230) 
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409) 
    at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352) 
Caused by: org.apache.maven.plugin.CompilationFailureException: Compilation failure 
C:\Devel\EclipseProjects\MyProject\target\generated-sources\gwt\my\package\client\DataServiceAsync.java:[8,7] duplicate class: my.project.client.DataServiceAsync 


    at org.apache.maven.plugin.AbstractCompilerMojo.execute(AbstractCompilerMojo.java:516) 
    at org.apache.maven.plugin.CompilerMojo.execute(CompilerMojo.java:114) 
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:105) 
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:577) 
    ... 16 more 
[ERROR] 
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles: 
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException

失败，目标目录已与以下目录结构创建，并在它的单个文件这样后：

MyProject/target/generated-sources/gwt/my/project/client/DataServiceAsync.java

由于目标目录在运行gwt:compile gwt:run -X -e之前不存在，因此必须创建目录并将java类作为执行目标的一部分进行复制。那么，为什么现在的目标会抱怨重复的课程呢？

任何帮助，非常感谢！

来源

2010-08-31 sdoca

我发现this posting其中规定：

If you manually create the Async interface you must disable the generateAsync goal in the plugin configuration

此修复程序是从我的pom.xml删除<goal>generateAsync</goal>。插件配置现在看起来像：

<plugin> 
    <groupId>org.codehaus.mojo</groupId> 
    <artifactId>gwt-maven-plugin</artifactId> 
    <version>1.2</version> 
    <executions> 
     <execution> 
      <goals> 
       <goal>compile</goal> 
       <goal>test</goal> 
      </goals> 
     </execution> 
    </executions> 
    <configuration> 
     <runTarget>my.package.Application/Application.html</runTarget> 
    </configuration> 
</plugin>

来源

2010-08-31 20:09:51 sdoca

您可能实际上已经生成了重复的类。

pom.xml中有一个“generateAsync”目标，它负责为您创建的每个服务生成Async类。如果你有这个你不需要手动创建一个异步版本。

如果你这样做，那么你会得到“重复类”的错误。

来源

2013-09-23 05:45:55 codingscientist

GWT Maven Eclipse插件 - 由于重复类而编译失败

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