[jbpm-users] best practice jbpm4 task

Hi , What is the preferred method of handling tasks in the frontend. a.k.a. based on what information of the task can the frontend provide the needed user interaction. Please do not misinterpret my question, I am fully aware its the responsibilty of the application and not jbpm to handle the user interaction, however in jbpm 3 we had controllers and variable mappings, the possiblity to create your TaskFactory and own task implementations for example. So how do we know that one task needs one user interaction and another task another user interaction? Solely based on the name/id of the task? Or something similar to jbpm 3, or handle this through assignment/task startevents?? Sorry, if this information is readily available somewhere, but I tried to find my answer in the forums, and the wiki and might have missed it. I just want to make sure what I will do is in line with the new ideas underlying jbpm4. Thanks, Marco