title: How to add ServletForwardingController to GrailsDispatcherServlet in Grails 3?
body: <p>I am trying to configure Grails 3.2 application to use Vaadin 8 alongside the dispatcher servlet. I added a compile dependency on "com.vaadin:vaadin-spring-boot-starter:2.0.0.beta1", which pulls necessary spring machinery (e.g. SpringVaadinServlet etc.) and Vaadin dependency. Spring Vaadin add-on depends on ServletForwardingController configured to forward all Vaadin requests to Spring Vaadin servlet from DispatcherServlet. How should I configure that for GrailsDispatcherServlet? At best, this would be something that could be put into a plugin for reuse.</p>