Can not compile simple Vaadin widgetset. - maven

Question

I created simple vaadin application and tried create my vaadin widget module.
File widget structure following:
client
TestConnector
TestWidget
Test
WidgetSet.gwt.xml
MyUI //vaadin UI
Content of this files following:
1) TestConnector
package test.client;
import test.Test;
import com.google.gwt.core.client.GWT;
import com.google.gwt.user.client.ui.Widget;
import com.vaadin.client.communication.RpcProxy;
import com.vaadin.client.ui.AbstractComponentConnector;
import com.vaadin.shared.ui.Connect;
#Connect(Test.class)
public class TestConnector extends AbstractComponentConnector {
private final TestServerRpc serverRpc = RpcProxy.create(TestServerRpc.class, this);
public TestConnector() {
registerRpc(TestClientRpc.class, new TestClientRpc() {
});
}
#Override
protected Widget createWidget() {
return GWT.create(TestWidget.class);
}
#Override
public TestWidget getWidget() {
return (TestWidget) super.getWidget();
}
#Override
public TestState getState() {
return (TestState) super.getState();
}
}
2) TestWidget
package test.client;
import com.google.gwt.user.client.ui.Label;
public class TestWidget extends Label {
public static final String CLASSNAME = "mycomponent";
public TestWidget() {
setText("This is MyComponent");
setStyleName(CLASSNAME);
}
}
3) Test
package test;
import test.client.TestClientRpc;
import test.client.TestServerRpc;
import test.client.TestState;
import com.vaadin.ui.AbstractComponent;
public class Test extends AbstractComponent {
public Test() {
registerRpc(new TestServerRpc() {
private TestClientRpc getClientRpc() {
return getRpcProxy(TestClientRpc.class);
}
});
}
#Override
protected TestState getState() {
return (TestState) super.getState();
}
}
4) WidgetSet.gwt.xml
<!DOCTYPE module PUBLIC "-//Google Inc.//DTD Google Web Toolkit 2.5.0//EN"
"http://gwtproject.org/doctype/2.5.0/gwt-module.dtd">
<module>
<inherits name="com.vaadin.DefaultWidgetSet"/>
</module>
5) MyUI
package test;
import javax.servlet.annotation.WebServlet;
import com.vaadin.annotations.Theme;
import com.vaadin.annotations.VaadinServletConfiguration;
import com.vaadin.server.VaadinRequest;
import com.vaadin.server.VaadinServlet;
import com.vaadin.ui.UI;
import com.vaadin.ui.VerticalLayout;
#Theme("mytheme")
public class MyUI extends UI {
#Override
protected void init(VaadinRequest vaadinRequest) {
final VerticalLayout layout = new VerticalLayout();
Test mywidget = new Test();
layout.addComponents(mywidget);
setContent(layout);
}
#WebServlet(urlPatterns = "/*", name = "MyUIServlet", asyncSupported = true)
#VaadinServletConfiguration(ui = MyUI.class, productionMode = false, widgetset = "Test")
public static class MyUIServlet extends VaadinServlet {
}
}
When I try to compile this I see:
[INFO] --- vaadin-maven-plugin:8.0.5:update-theme (default) # tests ---
[INFO] Updating theme VAADIN\themes\mytheme
[INFO] Widgetsets found from classpath:
[INFO] test.WidgetSet in file:/C:/Users/Alexey/IdeaProjects/tests/src/main/java
[INFO] com.vaadin.DefaultWidgetSet in jar:file:C:/Users/Alexey/.m2/repository/com/vaadin/vaadin-client/7.1-SNAPSHOT/vaadin-client-7.1-SNAPSHOT.jar!/
[INFO] Addon styles found from classpath:
[INFO]
[INFO] Search took 32ms
[INFO] Theme "VAADIN\themes\mytheme" updated
[INFO]
[INFO] --- vaadin-maven-plugin:8.0.5:update-widgetset (default) # tests ---
[INFO] auto discovered modules [test.WidgetSet]
[INFO] Updating widgetset test.WidgetSet
[INFO] Adding resource directory to command classpath: C:\Users\Alexey\IdeaProjects\tests\src\main\resources
[INFO] Using com.vaadin:vaadin-client-compiler version 8.0.5
[INFO] Widgetsets found from classpath:
[INFO] test.WidgetSet in file:/C:/Users/Alexey/IdeaProjects/tests/src/main/java
[INFO] com.vaadin.DefaultWidgetSet in jar:file:C:/Users/Alexey/.m2/repository/com/vaadin/vaadin-client/8.0.5/vaadin-client-8.0.5.jar!/
[INFO] Addon styles found from classpath:
[INFO]
[INFO] Search took 40ms
[INFO]
[INFO] --- vaadin-maven-plugin:8.0.5:compile-theme (default) # tests ---
[INFO] Updating theme VAADIN\themes\mytheme
[INFO] Theme "VAADIN\themes\mytheme" compiled
[INFO]
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) # tests ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 1 resource
[INFO]
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) # tests ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 7 source files to C:\Users\Alexey\IdeaProjects\tests\target\classes
[INFO] -------------------------------------------------------------
[ERROR] COMPILATION ERROR :
[INFO] -------------------------------------------------------------
[ERROR] /C:/Users/Alexey/IdeaProjects/tests/src/main/java/test/client/TestConnector.java:[14,8] cannot access com.google.gwt.event.shared.EventHandler
class file for com.google.gwt.event.shared.EventHandler not found
[ERROR] /C:/Users/Alexey/IdeaProjects/tests/src/main/java/test/client/TestWidget.java:[8,8] cannot access com.google.gwt.event.shared.HasHandlers
class file for com.google.gwt.event.shared.HasHandlers not found
[INFO] 2 errors
[INFO] -------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
I don't understand the reason of this error and don't know how to solve it. Why are com.google.gwt.event.shared.EventHandler and com.google.gwt.event.shared.HasHandlers needed in my program?
pom file:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>test</groupId>
<artifactId>tests</artifactId>
<packaging>war</packaging>
<version>1.0-SNAPSHOT</version>
<name>tests</name>
<prerequisites>
<maven>3</maven>
</prerequisites>
<properties>
<vaadin.version>8.0.5</vaadin.version>
<vaadin.plugin.version>8.0.5</vaadin.plugin.version>
<jetty.plugin.version>9.3.9.v20160517</jetty.plugin.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
<!-- If there are no local customisations, this can also be "fetch" or "cdn" -->
<vaadin.widgetset.mode>local</vaadin.widgetset.mode>
</properties>
<repositories>
<repository>
<id>vaadin-addons</id>
<url>http://maven.vaadin.com/vaadin-addons</url>
</repository>
</repositories>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-bom</artifactId>
<version>${vaadin.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.0.1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-server</artifactId>
</dependency>
<dependency>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-push</artifactId>
</dependency>
<dependency>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-client-compiled</artifactId>
</dependency>
<dependency>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-themes</artifactId>
</dependency>
<dependency>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-client</artifactId>
<version>7.1-SNAPSHOT</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>3.0.0</version>
<configuration>
<failOnMissingWebXml>false</failOnMissingWebXml>
<!-- Exclude an unnecessary file generated by the GWT compiler. -->
<packagingExcludes>WEB-INF/classes/VAADIN/widgetsets/WEB-INF/**</packagingExcludes>
</configuration>
</plugin>
<plugin>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-maven-plugin</artifactId>
<version>${vaadin.plugin.version}</version>
<executions>
<execution>
<goals>
<goal>update-theme</goal>
<goal>update-widgetset</goal>
<goal>compile</goal>
<!-- Comment out compile-theme goal to use on-the-fly theme compilation -->
<goal>compile-theme</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-clean-plugin</artifactId>
<version>3.0.0</version>
<!-- Clean up also any pre-compiled themes -->
<configuration>
<filesets>
<fileset>
<directory>src/main/webapp/VAADIN/themes</directory>
<includes>
<include>**/styles.css</include>
<include>**/styles.scss.cache</include>
</includes>
</fileset>
</filesets>
</configuration>
</plugin>
<!-- The Jetty plugin allows us to easily test the development build by
running jetty:run on the command line. -->
<plugin>
<groupId>org.eclipse.jetty</groupId>
<artifactId>jetty-maven-plugin</artifactId>
<version>${jetty.plugin.version}</version>
<configuration>
<scanIntervalSeconds>2</scanIntervalSeconds>
</configuration>
</plugin>
</plugins>
</build>
<profiles>
<profile>
<!-- Vaadin pre-release repositories -->
<id>vaadin-prerelease</id>
<activation>
<activeByDefault>false</activeByDefault>
</activation>
<repositories>
<repository>
<id>vaadin-prereleases</id>
<url>http://maven.vaadin.com/vaadin-prereleases</url>
</repository>
<repository>
<id>vaadin-snapshots</id>
<url>https://oss.sonatype.org/content/repositories/vaadin-snapshots/</url>
<releases>
<enabled>false</enabled>
</releases>
<snapshots>
<enabled>true</enabled>
</snapshots>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<id>vaadin-prereleases</id>
<url>http://maven.vaadin.com/vaadin-prereleases</url>
</pluginRepository>
<pluginRepository>
<id>vaadin-snapshots</id>
<url>https://oss.sonatype.org/content/repositories/vaadin-snapshots/</url>
<releases>
<enabled>false</enabled>
</releases>
<snapshots>
<enabled>true</enabled>
</snapshots>
</pluginRepository>
</pluginRepositories>
</profile>
</profiles>
</project>

Answer 1

Look like you are not using the 8.0.5 vaadin version in one of your dependencies, change the 7.1-SNAPSHOT to ${vaadin.version}
<dependency>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-client</artifactId>
<version>${vaadin.version}</version>
</dependency>
And you can probably remove the following dependency as it is the same as one above:
<dependency>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-client-compiled</artifactId>
</dependency>