i found in the topics lot of issues dealing with addons and problems with it.
i have similar problem, i cannot run rating stars demo, get
Widgetset does not contain implementation for org.vaadin.teemu.ratingstars.RatingStars. Check its @ClientWidget mapping, widgetsets GWT module description file and re-compile your widgetset. In case you have downloaded a vaadin add-on package, you might want to refer to add-on instructions. Unrendered UIDL:
org.vaadin.teemu.ratingstars.RatingStars(NO CLIENT IMPLEMENTATION FOUND
What is the right combination of plugin versions? with the following
the plugin gets downloaded correctly but the maven is looking for different plugin which does not exists, and
supposedly maven is thinking that it is org.apache.maven plugin and not vaadin plugin.
what is workaround for this problem…
Do make sure the widgetset compilation plugins are not commented out - your earlier symptoms with Maven looking for org.apache.maven.plugins:maven-vaadin-plugin instead of com.vaadin:vaadin-maven-plugin sounds like the configuraiton is missing. When that is corrected, you probably also see a warning because the version 1.0.1 of the vaadin-maven-plugin depends on an old version of the gwt-maven-plugin, but that should not prevent widgetset updates or compilation.
The module section in your POM should refer to your own widgetset (only), not the one in RatingStars - or you can omit the modules section if your widgetset file already exists in the correct location in your source tree, in which case it is automatically located. Then the command widgetset-update should automatically update your widgetset file to inherit RatingStars. Any other add-on widgets you might use will be added to your widgetset by the vaadin:update-widgetset goal.
And the widgetset parameter here should also refer to your own widgetset. You should consider the one in the add-on a “fragment” of a widgetset, and you compose your own widgetset by inheriting the default widgetset as well as any necessary “fragments”.