java-design-patterns/service-layer/src/main/java/com/iluwatar/servicelayer/hibernate/HibernateUtil.java

package com.iluwatar.servicelayer.hibernate;

import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;

import com.iluwatar.servicelayer.spell.Spell;
import com.iluwatar.servicelayer.spellbook.Spellbook;
import com.iluwatar.servicelayer.wizard.Wizard;

/**
 * 
 * Produces the Hibernate {@link SessionFactory}.
 *
 */
public class HibernateUtil {

  private static final SessionFactory sessionFactory;

  static {
    try {
      sessionFactory =
          new Configuration().addAnnotatedClass(Wizard.class).addAnnotatedClass(Spellbook.class)
              .addAnnotatedClass(Spell.class)
              .setProperty("hibernate.dialect", "org.hibernate.dialect.H2Dialect")
              .setProperty("hibernate.connection.url", "jdbc:h2:mem:test;DB_CLOSE_DELAY=-1")
              .setProperty("hibernate.current_session_context_class", "thread")
              .setProperty("hibernate.show_sql", "true")
              .setProperty("hibernate.hbm2ddl.auto", "create-drop").buildSessionFactory();
    } catch (Throwable ex) {
      System.err.println("Initial SessionFactory creation failed." + ex);
      throw new ExceptionInInitializerError(ex);
    }
  }

  public static SessionFactory getSessionFactory() {
    return sessionFactory;
  }
}