com.alfredmuponda.lostandfound.persistence.HibernateUtil.java Source code

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Here is the source code for com.alfredmuponda.lostandfound.persistence.HibernateUtil.java

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package com.alfredmuponda.lostandfound.persistence;

import java.util.Properties;

import org.hibernate.SessionFactory;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistry;

//import com.journaldev.hibernate.model.Employee1;

/**
 *
 * @author Alfred
 */
public class HibernateUtil {

    //XML based configuration
    private static SessionFactory sessionFactory;

    //Annotation based configuration
    private static SessionFactory sessionAnnotationFactory;

    //Property based configuration
    private static SessionFactory sessionJavaConfigFactory;

    private static SessionFactory buildSessionFactory() {
        try {
            // Create the SessionFactory from hibernate.cfg.xml
            Configuration configuration = new Configuration();
            configuration.configure("hibernate.cfg.xml");
            System.out.println("Hibernate Configuration loaded");

            ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder()
                    .applySettings(configuration.getProperties()).build();
            System.out.println("Hibernate serviceRegistry created");

            SessionFactory sessionFactory = configuration.buildSessionFactory(serviceRegistry);

            return sessionFactory;
        } catch (Throwable ex) {
            // Make sure you log the exception, as it might be swallowed
            System.err.println("Initial SessionFactory creation failed." + ex);
            throw new ExceptionInInitializerError(ex);
        }
    }

    private static SessionFactory buildSessionAnnotationFactory() {
        try {
            // Create the SessionFactory from hibernate.cfg.xml
            Configuration configuration = new Configuration();
            configuration.configure("hibernate-annotation.cfg.xml");
            System.out.println("Hibernate Annotation Configuration loaded");

            ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder()
                    .applySettings(configuration.getProperties()).build();
            System.out.println("Hibernate Annotation serviceRegistry created");

            SessionFactory sessionFactory = configuration.buildSessionFactory(serviceRegistry);

            return sessionFactory;
        } catch (Throwable ex) {
            // Make sure you log the exception, as it might be swallowed
            System.err.println("Initial SessionFactory creation failed." + ex);
            throw new ExceptionInInitializerError(ex);
        }
    }

    private static SessionFactory buildSessionJavaConfigFactory() {
        try {
            Configuration configuration = new Configuration();

            //Create Properties, can be read from property files too
            Properties props = new Properties();
            props.put("hibernate.connection.driver_class", "com.mysql.jdbc.Driver");
            props.put("hibernate.connection.url", "jdbc:mysql://localhost/LostAndFound");
            props.put("hibernate.connection.username", "hitrac");
            props.put("hibernate.connection.password", "hitrac");
            props.put("hibernate.current_session_context_class", "thread");

            configuration.setProperties(props);

            //we can set mapping file or class with annotation
            //addClass(Employee1.class) will look for resource
            // com/journaldev/hibernate/model/Employee1.hbm.xml (not good)
            //configuration.addAnnotatedClass(Employee1.class);

            ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder()
                    .applySettings(configuration.getProperties()).build();
            System.out.println("Hibernate Java Config serviceRegistry created");

            SessionFactory sessionFactory = configuration.buildSessionFactory(serviceRegistry);

            return sessionFactory;
        } catch (Throwable ex) {
            System.err.println("Initial SessionFactory creation failed." + ex);
            throw new ExceptionInInitializerError(ex);
        }
    }

    public static SessionFactory getSessionFactory() {
        if (sessionFactory == null)
            sessionFactory = buildSessionFactory();
        return sessionFactory;
    }

    public static SessionFactory getSessionAnnotationFactory() {
        if (sessionAnnotationFactory == null)
            sessionAnnotationFactory = buildSessionAnnotationFactory();
        return sessionAnnotationFactory;
    }

    public static SessionFactory getSessionJavaConfigFactory() {
        if (sessionJavaConfigFactory == null)
            sessionJavaConfigFactory = buildSessionJavaConfigFactory();
        return sessionJavaConfigFactory;
    }

}