Do you need a custom widgetset? If you're not using any widget addons, and since your're new to Vaadin I am assuming that you did not create your own widgets yet(?), you can simply use the precompiled widgetset provided by Vaadin. To do this, remove any xxx.gwt.xml file from your project, and replace the reference to it in web.xml with com.vaadin.DefaultWidgetset.
web.xml:
<init-param>
<name>widgetset</name>
<value>com.vaadin.DefaultWidgetSet</value>
</init-param>
pom.xml:
<dependency>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-client-compiled</artifactId>
<version>7.1.9</version> <!-- or whatever version you're using -->
</dependency>
If you do need a custom widgetset (and if you don't now, chances are that you will need one further down the road), do yourself a favor and put it in a separate project. In my experience, a widgetset very seldom changes, so why include it in a project that constantly changes. The default widgetset mentioned above, provided by Vaadin, is the prefect blueprint for building one. Just build your own, and copy its structure from vaadin-client-compiled.jar. You can use your favourite maven build helper for that, mine is assembly. Just create a maven project, setup pom.xml, add a xxx.gwt.xml and make sure web.xml contains a reference to it. My own setup looks something like what you see below.
pom.xml:
<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>
<name>MyWidgetset</name>
<groupId>com.company</groupId>
<artifactId>mywidgetset</artifactId>
<version>1.0-SNAPSHOT</version>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<vaadin.version>7.1.9</vaadin.version>
<vaadin.plugin.version>7.1.9</vaadin.plugin.version>
</properties>
<dependencies>
<!-- vaadin -->
<dependency>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-client</artifactId>
<version>${vaadin.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-client-compiler</artifactId>
<version>${vaadin.version}</version>
<scope>provided</scope>
</dependency>
<!-- custom widgets (NOTE: addons without a widget do not belong here) -->
<dependency>
<groupId>org.vaadin.addons</groupId>
<artifactId>filteringtable</artifactId>
<version>0.9.3.v7</version>
</dependency>
<dependency>
<groupId>org.vaadin.addons</groupId>
<artifactId>popupbutton</artifactId>
<version>2.3.0</version>
</dependency>
</dependencies>
<build>
<plugins>
<!-- vaadin update widgetset -->
<plugin>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-maven-plugin</artifactId>
<version>${vaadin.plugin.version}</version>
<configuration>
<extraJvmArgs>-Xmx512M -Xss1024k</extraJvmArgs>
<webappDirectory>${basedir}/target/VAADIN/widgetsets</webappDirectory>
<hostedWebapp>${basedir}/target/VAADIN/widgetsets</hostedWebapp>
<force>false</force>
<strict>true</strict>
<noServer>true</noServer>
<compileReport>true</compileReport>
<style>OBF</style>
<runTarget>http://localhost:8080/</runTarget>
</configuration>
<executions>
<execution>
<goals>
<goal>resources</goal>
<goal>update-widgetset</goal>
<goal>compile</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-assembly-plugin</artifactId>
<version>2.4</version>
<configuration>
<appendAssemblyId>false</appendAssemblyId>
<descriptors>
<descriptor>src/main/resources/assembly.xml</descriptor>
</descriptors>
</configuration>
<executions>
<execution>
<id>make-assembly</id>
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
<repositories>
<repository>
<id>vaadin-addons</id>
<url>http://maven.vaadin.com/vaadin-addons</url>
</repository>
</repositories>
</project>
assembly.xml:
<assembly xmlns="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.2"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.2 http://maven.apache.org/xsd/assembly-1.1.2.xsd">
<id>build-my-widgetset-jar</id>
<formats>
<format>jar</format>
</formats>
<includeBaseDirectory>false</includeBaseDirectory>
<fileSets>
<fileSet>
<directory>${basedir}/target/VAADIN/widgetsets</directory>
<outputDirectory>/VAADIN/widgetsets</outputDirectory>
<excludes>
<exclude>WEB-INF/</exclude>
</excludes>
</fileSet>
</fileSets>
</assembly>
MyWidgetset.gwt.xml:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE module PUBLIC
"-//Google Inc.//DTD Google Web Toolkit 1.7.0//EN"
"http://google-web-toolkit.googlecode.com/svn/tags/1.7.0/distro-source/core/src/gwt-module.dtd">
<module>
<inherits name="com.vaadin.DefaultWidgetSet" />
<inherits name="org.tepi.filtertable.gwt.FilterTableWidgetset" />
<inherits name="org.vaadin.hene.popupbutton.widgetset.PopupbuttonWidgetset" />
</module>
web.xml:
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
version="3.0">
<display-name>MyWidgetset</display-name>
<servlet>
<servlet-name>MyWidgetset</servlet-name>
<servlet-class>com.vaadin.server.VaadinServlet</servlet-class>
<init-param>
<param-name>ui</param-name>
<param-value>com.company.mywidgetset.App</param-value> <!-- use it for testing the widgetset-->
</init-param>
<init-param>
<param-name>widgetset</param-name>
<param-value>com.company.mywidgetset.MyWidgetset</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>MyWidgetset</servlet-name>
<url-pattern>/*</url-pattern>
</servlet-mapping>
</web-app>
project structure:
| pom.xml
|
\---src
+---main
| +---java
| | \---com
| | \---company
| | \---mywidgetset
| | App.java
| | MyWidgetset.gwt.xml
| |
| +---resources
| | assembly.xml
| |
| \---webapp
| \---WEB-INF
| web.xml
|
\---test
\---java
Build it, use the jar as a dependency in your project, and you're done. This will permanently release you from the big pain-in-the-butt that GWT calls "widgetset compilation".