7 | "Attempt to lock a non entity object" error(); Person p = new Person("Ron"); em.getTransaction().begin(); em.persist(p); em ... ().setRetainValues(true); em.getTransaction().begin(); p = em.find(Person.class, 1 ... : " + p.name); em.getTransaction().rollback(); em.getTransaction().begin |
7 | EntityTransaction.commit() does not release a pessimistic lock.getTransaction().begin(); em.persist(new Account(0)); em.getTransaction().commit(); // update EntityManager em1 = emf.createEntityManager(); em1.getTransaction().begin ... .getTransaction().begin(); Account a2 = em2.find(Account.class, 0, LockModeType.PESSIMISTIC_READ |
7 | zip file or JAR manifest missing, that is unnecessary in MySQL. I use ObjectDB exactly because persistence unit is not essential. trans.begin(); ItemList i = new ItemList(); i.setItemname("Beginning"); em.persist(i); trans.commit ... (){ int iCnt = 10; while (--iCnt>=0){ trans.begin(); Page uri = new Page(); uri.setsUrl |
7 | Remove not working); EntityManager em = emf.createEntityManager(); em.getTransaction().begin ... (); em.getTransaction().begin(); b = em.find(B.class, 1); em.remove(b ... . transaction.begin get Extent, traverse its entries, delete an object in there // needs a flush |
5 | Problem with byte arrays in JDO - ClassCastException.getPersistenceManager(); // Clear out existing objects pm.currentTransaction().begin ... .currentTransaction().commit(); pm.currentTransaction().begin(); Example example1 = new |
5 | Embedded Entity in EmbeddedId not persisted. Error 631 at select.(dbName).createEntityManager(); em.getTransaction().begin(); em.persist(new A(new ... it by persisting the B object explicitly: em.getTransaction().begin(); B b = new B(1); em |
5 | Problem with byte arrays in JDO - internal exception(); // Clear out existing objects pm.currentTransaction().begin(); Query query = pm ... ().commit(); pm.currentTransaction().begin(); Example example1 = new Example |
5 | Cannot catch a PersistenceException and continue the transaction but those don't work for me. Begin a new (nested) transaction in another method that will be rolled back instead of the first one- doesn't work. I got a message that it couldn't begin a new transaction |
1 | Best practise loading big data(); // create values em.getTransaction().begin(); MyStepBlockCollection sbc ... = null; long counter = 0; em.getTransaction().begin(); sbc = em.find ... populateDatabase(EntityManager em) { int valueCount = 0; em.getTransaction().begin |
1 | Negative snapshot user count;drop"); EntityManager em = emf.createEntityManager(); em.getTransaction().begin ... (); em2.getTransaction().begin(); em2.createQuery(DELETE_QUERY |
