public class DatabaseServiceImpl implements DatabaseService {
EntityManager em =
JPAContainerFactory.createEntityManagerForPersistenceUnit(
TwentyFourConstants.PERSISTENCE_UNIT);
@Override
public void init() {
if (isInitiated()) {
System.out.println("The database is already initiated.");
return;
}
System.out.println("Initiating database for the first time.");
addUsers();
markAsInitiated();
}
private boolean isInitiated() {
boolean initiated = false;
CriteriaQuery<Properties> query = em.getCriteriaBuilder().createQuery(Properties.class);
List<Properties> propertiesList =
em.createQuery(query.select(query.from(Properties.class))).getResultList();
for (Properties properties : propertiesList) {
if (properties.getDb().toString().equals("basic")
&& properties.getState().toString().equals("Initiated")) {
initiated = true;
}
}
return initiated;
}
private void addUsers() {
UserServiceImpl service = new UserServiceImpl();
service.addUser("chgri", "Chris", "Grivas", Role.ADMIN);
}
private void markAsInitiated() {
Properties twentyFourDatabaseState = new Properties();
twentyFourDatabaseState.setDb("basic");
twentyFourDatabaseState.setState("Initiated");
EntityTransaction tx = em.getTransaction();
tx.begin();
em.persist(twentyFourDatabaseState);
tx.commit();
}
}
