@Fluent public <T>Job on(String event,Handler<Message<T>> handler){
  logger.debug("[LOG] On: " + Kue.getCertainJobAddress(event,this));
  eventBus.consumer(Kue.getCertainJobAddress(event,this),handler);
  return this;
}

@ Fluent public < T > Job on ( String event , Handler < Message < T > > handler ) { logger . debug ( "[LOG] On: " + Kue . getCertainJobAddress ( event , this ) ) ; eventBus . consumer ( Kue . getCertainJobAddress ( event , this ) , handler ) ; return this ; }
add a certain event handler on event bus .
