How to make a non Spring Class part of a Transaction

[fv967]

Hi,

In my spring project, I'm using a class of "Interactive Brokers" and I explicitely annotate this class with @Component. This class is going to write into the DB via methods of a CRUDService (Spring bean), so I annotate all methods of the I.B. class with : @Transactional(propagation = Propagation.REQUIRES_NEW).

@Component
@Scope(BeanDefinition.SCOPE_PROTOTYPE)
public class RequestRealTimeBarsIB extends RetrievalBase {

    @Autowired
    private CRUDService crudService;

    @Transactional(propagation = Propagation.REQUIRES_NEW)
    public void realtimeBar(int reqId, long time, double open, double high, double low, double close, long volume, double wap, int count) {
          ...
          crudService.create(...);
} 

CRUDServiceBean.java

@Repository
@Scope(BeanDefinition.SCOPE_PROTOTYPE)
@Transactional(propagation = Propagation.MANDATORY)
// Above will simply ensure that a transaction has already been started when the DAO layer is entered
public class CRUDServiceBean implements CRUDService {

    @PersistenceContext
    private EntityManager em;

    public EntityManager getEntityManager() {
        return em;
    }

    public <T extends BaseEntity> T create(T t) {
        em.persist(t);
        em.flush();
        em.refresh(t);
        return t;
    } 

The methods of RequestRealTimeBarsIB are called by Interactive brokers service automatically every 5 seconds.

The Problem is that the create method of CRUDService is throwing an exception :

"No Excisting transaction found for transaction marked with propagation 'mandatorry'

How can I make sure that a transaction is started regardless how the method realtimeBar(..) is called ?

Many thanks,

Frank