ObjectDB ObjectDB

Internal Website Search

91-100 of 200 resultsRefresh
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

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
5

How prevent post-compile enhancement of non entity classes

/objectdb.jar"/> <target name="-post-compile"> <echo message="begin ObjectDB enhancer"/> <java ... compile single: begin ObjectDB enhancer"/> <java classname="com.objectdb.Enhancer" fork="true
5

Cannot sort descending, when ordering by caluculated float in a method

();                 em.getTransaction().begin();                 Invoice i1 = new Invoice();         i1 ... (); em.getTransaction().begin(); Invoice i1 = new Invoice(); i1.getItemList().add
1

Negative snapshot user count

;drop");         EntityManager em = emf.createEntityManager();         em.getTransaction().begin ... ();                     em2.getTransaction().begin();                     em2.createQuery(DELETE_QUERY

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

Need Help?

  1. Search ObjectDB website
  2. Read the FAQ
  3. Follow the Tutorials
  4. View or post in the forum
  5. Search or file an issue
  6. Contact support