playframework1.2.3 save data into database without transaction - jpa

Question

I cannot save my entity data into database without transaction.
I know PersistenceContextType.Extend, But I cannot success.
#NoTransaction
public class Application extends Controller {
public static void create(String body) {
// EntityTransaction tm = JPA.em().getTransaction();
if (!JPA.isEnabled()) {
System.out.println("JPA is not initialized");
}
EntityManager manager = JPA.entityManagerFactory.createEntityManager();
//manager.setFlushMode(FlushModeType.COMMIT);
manager.setProperty("org.hibernate.readOnly", false);
//new Customer("001").save();
if (!JPA.isInsideTransaction()) {
// manager.getTransaction().begin();
}
createContext(manager, false);
new Customer("001").save();
//manager.getTransaction().commit();
/*
* if (tm.equals(null)) { System.out.println("success"); }
*/
}
static void createContext(EntityManager entityManager, boolean readonly) {
if (JPA.local.get() != null) {
try {
JPA.local.get().entityManager.close();
} catch (Exception e) {
// Let's it fail
}
JPA.local.remove();
}
JPA context = new JPA();
context.entityManager = entityManager;
// context.readonly = readonly;
JPA.local.set(context);
}
}
I initialed the JPA by myself to prevent play from starting a transaction.
I want to save my data into database, but I get a TransactionRequiredException error.
I known that JPA operation need a transaction, but I want to know whether has a exception.

Answer 1

I am not really sure what you are trying to achieve here. It is best to let Play handle transactions. You will not be able to commit your changes without a transaction.
If you need more control as to when the transaction is commited you could use a utility method like:
public static void commit() {
if (JPA.em().getTransaction().getRollbackOnly()) {
JPA.em().getTransaction().rollback();
} else {
JPA.em().getTransaction().commit();
}
JPA.em().getTransaction().begin();
JPA.em().flush();
JPA.em().clear();
}