Examples with UnitOfWork org.eclipse.persistence.sessions.UnitOfWork used on opensource projects

Example 6 with UnitOfWork

use of org.eclipse.persistence.sessions.UnitOfWork in project spring-framework by spring-projects.

the class EclipseLinkJpaDialect method beginTransaction.

@Override
@Nullable
public Object beginTransaction(EntityManager entityManager, TransactionDefinition definition) throws PersistenceException, SQLException, TransactionException {
    if (definition.getIsolationLevel() != TransactionDefinition.ISOLATION_DEFAULT) {
        // Pass custom isolation level on to EclipseLink's DatabaseLogin configuration
        // (since Spring 4.1.2)
        UnitOfWork uow = entityManager.unwrap(UnitOfWork.class);
        uow.getLogin().setTransactionIsolation(definition.getIsolationLevel());
    }
    entityManager.getTransaction().begin();
    if (!definition.isReadOnly() && !this.lazyDatabaseTransaction) {
        // Begin an early transaction to force EclipseLink to get a JDBC Connection
        // so that Spring can manage transactions with JDBC as well as EclipseLink.
        entityManager.unwrap(UnitOfWork.class).beginEarlyTransaction();
    }
    return null;
}