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GWT RPC Simple Example Doesn't Work in Eclipse Neon 1 and Vaadin 7.7
Setup a new project in Eclipse using the wizard. Test default application configured to run on jetty and works as expected. Would like to test a GWT RPC example. Use the wizard to create a sample widget where when clicked 5 times you get a message. Complie Vaadin Widgetset via the toolbar. Add custom widget to the demo app and get the following error message for the @connector. Spent countless hours searching the error message for clues. Many others have had this problem and appears to be a configuration issue. Tried all the helpful suggestions and can't resolve.
The expectation is since I am using a vaadin provide wizard to create the project and creat the custom widget in eclipse it should work. I have included the pom.xml file autogenerated where I did add artifactId=vaadin-client so it would resolve com.google.gwt.* imports. The source code is autogenerated. I did add widgetset="AppWidgetset" based on a help item in a forum in @VaadinServletConfiguration(ui = MyUI.class, productionMode = false, widgetset = "AppWidgetset")
Was hoping someone could try and reproduce the error using the project wizards in eclipse and determine what isn't getting configured properly.
<?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>com.example</groupId>
<artifactId>myapplication</artifactId>
<packaging>war</packaging>
<version>1.0-SNAPSHOT</version>
<name>myapplication</name>
<prerequisites>
<maven>3</maven>
</prerequisites>
<properties>
<vaadin.version>7.7.3</vaadin.version>
<vaadin.plugin.version>7.7.3</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>${vaadin.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.0.1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-server</artifactId>
</dependency>
<dependency>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-push</artifactId>
</dependency>
<dependency>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-client-compiled</artifactId>
</dependency>
<dependency>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-themes</artifactId>
</dependency>
<dependency>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-client</artifactId>
<scope>provided</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>2.6</version>
<configuration>
<failOnMissingWebXml>false</failOnMissingWebXml>
<!-- Exclude an unnecessary file generated by the GWT compiler. -->
<packagingExcludes>WEB-INF/classes/VAADIN/widgetsets/WEB-INF/**</packagingExcludes>
</configuration>
</plugin>
<plugin>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-maven-plugin</artifactId>
<version>${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>