I want suggest a second approach for the same feature: @Observer(String[] value, boolean create) Where the "boolean create" indicate if that component should be create when it not exists. I dig a little on Seam code and conclude that this is very easy to do. This information could be setted on Init.ObserverMethod and Event.raiseEvent() could be changed to consider that. This is less power than previous approach but is simple too. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3992751#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...