About EntityManager

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Forum
3

Merge with Parent/Child entities not possible

javax.persistence.Entity; import javax.persistence.EntityManager; import javax.persistence ... id) {    this.id = id;   } } private EntityManager createEntityManager(String dbFileName ... ("objectdb:" + dbFileName);   EntityManager entityManager = emf.createEntityManager
Forum
3

Updating Entities

"); public static EntityManager employeeDB = emf.createEntityManager(); public static EntityManager ... EntityManagers were not communicating their changes to each other. Which is where my question comes in ... within their respective EntityManager i.e. EmployeeOverview deals with employeeDB - PaygradeOverview deals
Forum
3

Internal exception when updating date filed (TemporalType.DATE)

;         private EntityManager entityManager;         public DataManager(String connectionString ... );             entityManager = entityManagerFactory.createEntityManager();         }         public void ... :" + newBirthday.toString());             try {                 entityManager.getTransaction().begin
Forum
3

@OneToMany(fetch = FetchType.LAZY) list is always null

") private EntityManager entityManager; @EJB private Manager manager; private ... = entityManager.createQuery("SELECT p FROM Parent p"); parents = query.getResultList ... (unitName = "my-pu") private EntityManager entityManager; public void persist(Object o
Forum
3

Performance in large transactions

++) { EntityManager entityManager = getEntityManagerFactory().createEntityManager(); entityManager.setFlushMode(FlushModeType.AUTO); EntityTransaction transaction = entityManager.getTransaction ... = create10000Entites(); entityManager.merge(entities); x.end += 1; transaction.commit
JPA Doc
3

javax.persistence.EntityExistsException

: Serializable Thrown by the persistence provider when EntityManager.persist(Object) is called ... See Also: javax.persistence.EntityManager.persist(Object) EntityExistsException() Constructs a new
JPA Doc
3

javax.persistence.NamedNativeQuery

name The name used to refer to the query with the EntityManager methods that create query objects. The name used to refer to the query with the EntityManager methods that create query objects
JPA Doc
3

javax.persistence.Persistence

: persistenceUnitName - the name of the persistence unit Returns: the factory that creates EntityManagers configured ... : the factory that creates EntityManagers configured according to the specified persistence unit. Since: JPA 1.0
Forum
3

Memory Leaks after COMMIT operation (checked on versions 2.6.5 & 2.6.6.b01)

_EntityManager = m_EntityMgrFactory.createEntityManager(); m_EntityManager.setFlushMode( FlushModeType.COMMIT ); if ( m_EntityManager.isOpen() ) { m_EntityManager.getTransaction().begin(); for ( Pa3DataKey dataKey : aDataKeys ) { m_EntityManager.persist( dataKey
Issue
3

Removing of an entity removes also another entity type

with a result and after that a ToleranceDefinition entity is removed from database by entitymanager ... . Please note that mixing direct DELETE / UPDATE database queries with EntityManager's operations is known as ... the EntityManager mechanism and therefore are very risky as the EntityManager can easily loss