While displaying the web page, it goes in an infinite loop, displaying this error:
There is no Action mapped for action name VaadinvizApplication/UIDL/
VaadinvizApplication beeing my Vaadin servlet mapped path. Vaadin communicates through UIDL a lot asynchronously.
Struts 2 catches every request / response like an action and wants to do something about it since it filters everything with /*
UIDL is a Vaadin class that gets called asynchronously often, but i don't want Struts 2 to be doing anything about it.
That's why i asked "how can i provide a 'do nothing' struts 2 action".
I want to know how to map VaadinvizApplication/UIDL/ so i can just return "success" or nothing to the same page because i don't want to do nothing with the Struts 2 action.
P.S. I suspect the communication starts from Vaadin through UIDL, and sometime, Struts 2 gets in the way filtering the response by not beeing mapped, and it doesn't get to Vaadin.
If Struts 2 would just forward or ignore the Vaadin comms, i believe there wouldn't be a problem.
I got a war hosted here (but you have to get JSTL, Struts 2, c and sql tlds, Vaadin jar):
http://vaadin.com/forum/-/message_boards/message/99801