Hi Mauricio,
thanks for the tip.
Actually, I am working with the following example and try to adapt/cut out the activiti part and use jBPM instead.
https://vaadin.com/de/wiki/-/wiki/Main/Building%20Vaadin%20Applications%20on%20top%20of%20Activiti
Do you know any more (complex) examples I can use to as a "treasure map" to find the right way?
Sporty regards,
Tom