[xwiki-devs] [Proposal] Modifications to Observation module

Hi, There's a pb with the current implementation: When we get the Observation manager implementation and list the registered listeners we only get the components that have been initialized *before* we get the Observation manager component. Thus if we want to be sure all listeners will receive events we need to ensure they're loaded first. This is hard to do. I'm proposing instead to modify the observation module: * Modify EventListener to be a @ComponentRole * Add List<Event> EventListener.getEvents() (the events that the listener handles) * Inject List<EventListener> in DefaultObservationManager. Thus when the Observation Manager is looked up, all listener components are created and injected. * Keep add/removeListener in ObservationManager so that listeners can be manually added/removed (for ex if a new listener component is added dynamically in the system) but with following signatures: - addListener(EventListener); - removeListener(EventListener); WDYT? Thanks -Vincent