HibernateUtils.java

package org.dayatang.observer;

import org.dayatang.observer.domain.FatherObserver;
import org.dayatang.observer.domain.MotherObserver;
import org.hibernate.SessionFactory;
import org.hibernate.boot.MetadataSources;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
import org.hibernate.service.ServiceRegistry;

public class HibernateUtils {
    private static SessionFactory sessionFactory = buildSessionFactory();

    @SuppressWarnings("deprecation")
    private static SessionFactory buildSessionFactory() {
        final ServiceRegistry registry = new StandardServiceRegistryBuilder()
                .configure() // configures settings from hibernate.cfg.xml
                .build();
        try {
            return new MetadataSources(registry)
                    .addAnnotatedClass(FatherObserver.class)
                    .addAnnotatedClass(MotherObserver.class)
                    .buildMetadata()
                    .buildSessionFactory();
        } catch (Exception e) {
            // The registry would be destroyed by the SessionFactory, but we had trouble building the SessionFactory
            // so destroy it manually.
            StandardServiceRegistryBuilder.destroy(registry);
            throw new RuntimeException(e);
        }
    }

    public static synchronized SessionFactory getSessionFactory() {
        if (sessionFactory == null || sessionFactory.isClosed()) {
            sessionFactory = buildSessionFactory();
        }
        return sessionFactory;
    }

    public static void close() {
        sessionFactory.close();
    }


}