Vaadin portlets are developed with Vaadin framework. The Vaadin framework can also be used to develop standalone web applications. Liferay portal supports the Vaadin portlets.
In this section, we will write a Vaadin portlet for Liferay portal using the Vaadin Eclipse plugin.
Install the following software for the development environment, if they are not already there:
If you have not already done so, configure Tomcat 6.0 in Eclipse as follows: