I am trying to make a small example portlet in Liferay, but I try to integrate Gwt (Google Web Toolkit + Vaadin + Liferay)
a) I’ve installed Gwt plugin (from Web) in Eclipse. (It’s ok)
b) In project properties eclipse I have activate:
- Use Google app Engine → Use specific SDK (1.2.6)
- Use Google Web ToolKit → “” (1.7.1)
(Libraries are correct installed in project)
The example:
package com.example.mauro1;
import com.vaadin.Application;
import com.vaadin.ui.*;
import com.google.gwt.core.client.GWT;
public class Mauro1Application extends Application {
@Override
public void init() {
Window mainWindow = new Window(“Mauro1 Application”);
Label label = new Label(“Hello Mauro User”);
mainWindow.addComponent(label);
setMainWindow(mainWindow);
GWT.log(“Hello World!”, null);
}
}
c)In apache tomcat log: 1 portlet for Mauro-example is available for use
d) (Liferay) Add application The apache-tomcat log message say:
17:45:09,342 ERROR [PortletRequestDispatcherImpl:316]
javax.servlet.ServletException: java.lang.NoClassDefFoundError: com/google/gwt/core/client/GWT
javax.servlet.ServletException: java.lang.NoClassDefFoundError: com/google/gwt/core/client/GWT
at com.vaadin.terminal.gwt.server.AbstractApplicationServlet.handleServiceException(AbstractApplicationServlet.java:828)
at com.vaadin.terminal.gwt.server.AbstractApplicationServlet.service(AbstractApplicationServlet.java:478)
etc …
etc …
How can I integrate in Liferay ?
Thanks