SpringStateMachineHack

@Bean
public StateMachineListener<States, Events> listener() {
 
    return new StateMachineListenerAdapter<States, Events>() {
        @Override
        public void stateChanged(State<States, Events> from, State<States, Events> to) {
 
            if (from == null) {
                System.out.println("State machine initialised in state " + to.getId());
            } else {
                System.out.println("State changed from " + from.getId() + " to " + to.getId());
            }
        }
    };
}