My project have the requirement of using Vaadin for portlet creation on Liferay Portal.
I am thinking of which IDE to be used-

1. RAD with Vaadin plugin or
2. Ecllipse with Vaadin plugin or
3. Liferay Visual Studio

Please help on this, providing the pros and cons of each.

-Priyanka

Just use Liferay IDE (or if you have Liferay EE, use Liferay Visual Studio) because it already supports Vaadin.

Just select "Vaadin" during portlet wizard.

Any of the Eclipse derivatives can leverage the Vaadin plugin from Vaadin.com. This will provide the visual editor for Vaadin components and works really well for us.

I've noticed that the latest version of IntelliJ IDEA has some Vaadin support, but I haven't had a chance to play with it yet...

Really the only difference between the tools you've listed is the level of support for Liferay development. A vanilla RAD or Eclipse will have very little in the way of Liferay development support where the Liferay Developer Studio (LDS) has as much support as has currently been developed.

We use LDS very successfully for portlet development using Vaadin.