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2

Empty temporary dat files in the temp folder

, begin a transaction, do some stuff (find, persist, remove …) and then commit or in the case of errors ... ();   em.setFlushMode(FlushModeType.AUTO);   em.getTransaction().begin();   MyEntity myEntity = new ... .createEntityManager();   em.setFlushMode(FlushModeType.AUTO);   em.getTransaction().begin
Forum
2

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
Forum
2

Error using query with MAX() function

(); } public void doit() { for(int i=1;i<32766;i++) { em.getTransaction().begin ... .getTransaction().begin(); CriteriaBuilder cb = em.getCriteriaBuilder(); CriteriaQuery q = cb ... .getTransaction().commit(); em.getTransaction().begin(); } After much trying to reliably
Forum
2

Extra uninitialised entities spawned on merge()

.createEntityManager();         em.getTransaction().begin();         Element root = new Element(null ... );                 if (DO_PERSIST_BEFORE_MERGE) {             em.getTransaction().begin();             em.persist(e);             em.getTransaction().commit();         }         em.getTransaction().begin
Forum
2

Left join fetch behaviour doesn't retrieve children?

();         if (! em.getTransaction().isActive()) {             em.getTransaction().begin ... .getTransaction().isActive()) {    em.getTransaction().begin();   }   MyEntity e1 = new MyEntity ... ();   if (!em.getTransaction().isActive()) {    em.getTransaction().begin();   }   // Write 100 000
Forum
2

New to Product & Having An Issue

, "dOne", null); try{ em.getTransaction().begin(); em.persist(department ... (this.foundResult); try{ em.getTransaction().begin(); em.remove ... .getResultList(); em.getTransaction().begin(); for(Department d
Issue
2

ObjectDB-2.6.9: Failed to commit transaction: Failed to set numeric value of field property Element.id using reflection

it will report: Java/JVM version: 1.8 Java/JVM detail version: 1.8.0_74 ObjectDB enhancer: begin ... .createEntityManager(); format().out("Persist project.."); em.getTransaction().begin(); em ... detail version: 1.8.0_74 ObjectDB enhancer: begin: (all classes within entity packages): javac.classpath:lib
Forum
2

Optimistic Locking

.getPersistenceManager(); pm.currentTransaction().begin(); pm.makePersistent(new Counter ... .getExtent(Counter.class).iterator().next(); pm1.currentTransaction().begin(); c1.increase ... .currentTransaction().begin(); c2.increase(); // First user commits - succeeds:   pm1
Forum
2

Performance and memory usage of queries

.AUTO);    em.getTransaction().begin();    MyEntity myEntity = new MyEntity();    myEntity = em ... .setFlushMode(FlushModeType.AUTO);   em.getTransaction().begin();   Query q = em.createQuery("DELETE ... ) This DELETE query is very simple, but indeed requires a lot of memory:     em.getTransaction().begin
Forum
2

Remove not working

); EntityManager em = emf.createEntityManager(); em.getTransaction().begin(); B b = new B ... .getTransaction().begin(); b = em.find(B.class, 1); em.remove(b); A a = em.find ... in a for-each statement.   transaction.begin get Extent, traverse its entries, delete an object