使用Maven和Spring Boot的Vaadin自定义组件/小部件

Question

我是vaadin的新手，刚开始使用spring boot应用程序和vaadin spring boot插件。一切正常，直到我到达我试图创建自己的组件/小部件的程度。

不幸的是，我没有找到任何“官方”示例/文档如何在Spring启动应用程序中设置自定义组件，所以我不得不搜索网络以了解如何在maven中设置其他插件以编译代码客户端小部件。据我可以从日志输出中看出这些组件的编译有效，但是当我尝试在网页上访问这些组件时，我收到一个错误：

Widgetset 'com.vaadin.DefaultWidgetSet' does not contain implementation for net.gtidev.test.components.MyComponent. Check its component connector's @Connect mapping, widgetsets GWT module description file and re-compile your widgetset. [...]

这是小部件编译器日志：

[INFO] Using com.vaadin:vaadin-client-compiler version 7.6.4
[ERROR] Mar 22, 2016 10:22:43 AM java.util.prefs.WindowsPreferences <init>
[ERROR] WARNUNG: Could not open/create prefs root node SoftwareJavaSoftPrefs at root 0x80000002. Windows RegCreateKeyEx(...) returned error code 5.
[INFO] Compiling module net.gtidev.test.components.TestWidgetset
[INFO]    Computing all possible rebind results for 'com.vaadin.client.metadata.ConnectorBundleLoader'
[INFO]       Rebinding com.vaadin.client.metadata.ConnectorBundleLoader
[INFO]          Invoking generator com.vaadin.server.widgetsetutils.ConnectorBundleLoaderFactory
[INFO]             Populating eager bundle

. . . . . 250 more lines

[INFO]    Computing all possible rebind results for 'com.vaadin.client.ui.dd.VAcceptCriterionFactory'
[INFO]       Rebinding com.vaadin.client.ui.dd.VAcceptCriterionFactory
[INFO]          Invoking generator com.vaadin.server.widgetsetutils.AcceptCriteriaFactoryGenerator
[INFO]             Detecting available criteria ...
[INFO]             creating mapping for com.vaadin.event.dd.acceptcriteria.AcceptAll
[INFO]             creating mapping for com.vaadin.event.dd.acceptcriteria.And
[INFO]             creating mapping for com.vaadin.event.dd.acceptcriteria.ContainsDataFlavor
[INFO]             creating mapping for com.vaadin.event.dd.acceptcriteria.SourceIs
[INFO]             creating mapping for com.vaadin.ui.AbstractSelect.TargetItemIs
[INFO]             creating mapping for com.vaadin.ui.AbstractSelect.AcceptItem
[INFO]             creating mapping for com.vaadin.ui.Table.TableDropCriterion
[INFO]             creating mapping for com.vaadin.ui.Tree.TreeDropCriterion
[INFO]             creating mapping for com.vaadin.event.dd.acceptcriteria.Not
[INFO]             creating mapping for com.vaadin.event.dd.acceptcriteria.Or
[INFO]             creating mapping for com.vaadin.event.dd.acceptcriteria.ServerSideCriterion
[INFO]             creating mapping for com.vaadin.event.dd.acceptcriteria.SourceIsTarget
[INFO]             creating mapping for com.vaadin.event.dd.acceptcriteria.TargetDetailIs
[INFO]             creating mapping for com.vaadin.ui.Tree.TargetInSubtree
[INFO]             Done. (0seconds)
[INFO]    Compiling 1 permutation
[INFO]       Compiling permutation 0...
[INFO]    Compile of permutations succeeded
[INFO]    Compilation succeeded -- 59,217s
[INFO] Linking into C:projectsmiscvaadin-boot	argetvaadin-boot-0.0.1-SNAPSHOT
et.gtidev.test.components.TestWidgetset
[INFO]    Link succeeded
[INFO]    Linking succeeded -- 0,492s

我用于自定义组件的文件是由vaadin 7项目中的eclipse vaadin插件生成的，我只是为此目的创建的。当我在eclipse中启动这个vaadin 7项目时，该组件工作正常。然后我将这些文件复制到我的spring boot maven项目中，自定义组件不再被加载。

我知道spring引导应用程序的引导机制和布局与“经典”webapps略有不同，除此之外，静态资源不是从webapp-folder加载，而是从classpath：/ static文件夹加载。我认为问题的核心与这个事实有关，但我不知道如何解决它。

我的插件配置（我尝试使用和不使用注释选项）：

<plugin>
  <groupId>com.vaadin</groupId>
  <artifactId>vaadin-maven-plugin</artifactId>
  <version>7.6.4</version>
  <configuration>
    <strict>true</strict>
    <force>true</force>
    <!-- Enable during development to speed compiling. -->
    <!-- <draftCompile>true</draftCompile>
    <style>DETAILED</style> -->
    <!-- End development options -->
    <!--<webappDirectory>src/main/webapp/VAADIN/widgetsets</webappDirectory>-->
    <modules>
      <module>net.gtidev.test.components.TestWidgetset</module>
    </modules>
  </configuration>
  <executions>
    <execution>
      <goals>
        <goal>resources</goal>
        <goal>compile</goal>
      </goals>
    </execution>
  </executions>
</plugin>

我尝试了不同的maven插件组合和配置。在一个例子中，还提到了一个Google-GWT插件，但是在代码上运行这个插件产生了与vaadin插件相同的日志输出：

<plugin>
  <groupId>org.codehaus.mojo</groupId>
  <artifactId>gwt-maven-plugin</artifactId>
  <version>2.5.1</version>
  <!--<configuration>-->
  <!--<webappDirectory>src/main/webapp/VAADIN/widgetsets</webappDirectory>-->
  <!--<extraJvmArgs>-Xmx512M -Xss1024k</extraJvmArgs>-->
  <!--<runTarget>clean</runTarget>-->
  <!--<hostedWebapp>${project.build.directory}/${project.build.finalName}</hostedWebapp>-->
  <!--<noServer>true</noServer>-->
  <!--<port>8080</port>-->
  <!--<soycDetailed>false</soycDetailed>-->
  <!--</configuration>-->
  <executions>
    <execution>
      <goals>
        <goal>resources</goal>
        <goal>compile</goal>
      </goals>
    </execution>
  </executions>
</plugin>