@Override
public void deleteConference(long conferenceId) {
try {
Conference c = em.find(Conference.class, conferenceId);
em.getTransaction().begin();
// first remove related relation ...
for (Key Skey : c.getStakeholders()) {
Stakeholder s = em.find(Stakeholder.class, Skey.getId());
s.getConferences().remove(c.getId());
em.persist(s);
}
// then remove the entity
em.remove(c);
em.getTransaction().commit();
} catch (Exception e) {
e.printStackTrace();
} finally {
em.close();
}
}
