I've done quite a bit a research on this with no luck, but all the answers have a tendency to point toward the
session context settings in the config file. What is odd is that I get a
session connection the very first time I hit the page (and therefore, a successful result set), but then when I reload I get the following exception: org.hibernate.SessionException:
Session is closed!
Here are my config settings that are not DB connection string related:
<property name="hibernate.show_sql">false</property>
<property name="hibernate.dialect">org.hibernate.dialect.SQLServerDialect</property>
<property name="hibernate.current_session_context_class">thread</property>
<property name="hibernate.cache.provider_class">org.hibernate.cache.NoCacheProvider</property>
<property name="hibernate.cache.use_query_cache">false</property>
<property name="hibernate.cache.use_minimal_puts">false</property>
Here is an example of a call I make that produces the situation I described above.
public T get(int id) {
session.beginTransaction();
T type;
try {
type = getTypeClass().cast(session.get(getTypeClass(), id));
} catch (ClassCastException classCastException) {
throw new ClassCastException(classCastException.getMessage());
}
session.getTransaction().commit();
return type;
}
The
session variable reference is to a static field that contains the current
session. All of the
session connection details are textbook reference manual. For example, here is my Hibernate
session utility:
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
public class HibernateSessionFactoryUtil {
private static final SessionFactory sessionFactory = buildSessionFactory();
private static SessionFactory buildSessionFactory() {
try {
return new Configuration().configure().buildSessionFactory();
} catch (Throwable ex) {
System.err.println("Initial SessionFactory creation failed." + ex);
throw new ExceptionInInitializerError(ex);
}
}
public static SessionFactory getSessionFactory() {
return sessionFactory;
}
}
