[xwiki-devs] [Proposal] Add a wiki filling event

Hi devs! When we create a subwiki from a template, we import a lot of documents that are then displayed in the Activity Stream, and it should not (cf: http://jira.xwiki.org/browse/XWIKI-9489 ). Following the Sergui's advice, I have created a Pull Request that create a new interface called TransientEvent. A transient event means an event that should not be seen by users but that the system can care about it. Moreover, coupled with begin/end events, it means that every events related to a transient event should not be shown to users neither. I don't really like this name because, in my opinion, all events are ephemerals. But at least this interface can solve this problem. But we don't want to hide the fact that a new wiki has been created. Displaying a message concerning the creation of a wiki is a valid use-case. What we want to hide is the import of a lot of documents during the "initialization" phase of that wiki. That is why I propose to create a new event: WikiFillingEvent, which will be transient. It will be associated to a begin/end events so every document creation during this filling process will be hidden in the AS. I'm not sure about the name, but I think we need it. WDYT? LM