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2

Optimistic locking: prevent version increment on entity collection attribute

with the EntityManager's life cycle but cannot figure out what. I am using Guice injection and Guice persist and should get one EntityManager per request. Also, please note that in the web app I actually ... is the EntityManager     em.getTransaction().begin();        Document doc = new Document
2

JBOSS AS7 7.1.1 - Entity not persisted and createNamedQuery fire exception

java.util.List; import javax.ejb.Stateless; import javax.persistence.EntityManager; import javax ... EntityManager em;     // Stores a new guest     public void persist(final Guest guest ... ; import javax.ejb.Stateless; import javax.persistence.EntityManager; import javax.persistence
2

Memory consumption of empty Strings

.odb");     EntityManager entityManager = entityManagerFactory.createEntityManager ... );       entityManager.getTransaction().begin();       entityManager.persist(entity);       entityManager.getTransaction().commit();       entityManager.clear();     }     entityManager.close
2

Should derived fields of an EmbeddedId be manually maintained by app code?

.Entity; import javax.persistence.EntityManager; import javax.persistence.FlushModeType; import ... static EContainer getInstance(EntityManager em) { EContainer c = em.find(EContainer.class, "1 ... , EntityManager em) throws TestException { if (lastInstanceInMap == null) { lastInstanceInMap = 0
2

Insertion Speed Rate and Batch Load

This test from the Memory Leak thread uses a separate transaction, and moreover, a new EntityManager per stored entity object. A batch load should reuse the EntityManager and persist a large number ... =             Persistence.createEntityManagerFactory("$objectdb/db/speed.odb");         EntityManager
2

javax.persistence.PessimisticLockScope

of the EntityManager, Query, and TypedQuery interfaces that allow lock modes to be specified or used
2

javax.persistence.PersistenceContext

javax.persistence Annotation PersistenceContext Target: Classes and fields (including property get methods) Expresses a dependency on a container-managed EntityManager and its associated persistence context. Since: JPA 1.0 String name (Optional) The name by which the entity manager
2

NamedNativeQuery.name

Annotation Element javax.persistence.NamedNativeQuery String name The name used to refer to the query with the EntityManager methods that create query objects. Since: JPA 1.0
2

NamedQuery.name

Annotation Element javax.persistence.NamedQuery String name (Required) The name used to refer to the query with the EntityManager methods that create query objects. Since: JPA 1.0
2

ODB IndexActivation NullPointerException

to an existing Database and create an EntityManager. 1) sometimes the following System out: * Batch ... with opening and closing the creation of EntityManagerFactory or of EntityManager? Is it possible ... ) is to create a entityManager - close it - and wait a few seconds, that the IndexActiovation thread

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