public class MyService {

    @Autowired
    StateMachineFactory<States, Events> factory;

    HashMap<String, StateMachine<States, Events>> stateMachineMap = new HashMap<>();

    void initMachine(String lessonId) {
        StateMachine<States,Events> stateMachine = factory.getStateMachine();
        stateMachine.start();
        stateMachineMap.put(lessonId, stateMachine);
    }

    void transit(Event e1, String lessonId){
        stateMachineMap.get(lessonId).sendEvent(e1);
    }
}