src.conexao.HibernateUtil.java Source code

Introduction

Here is the source code for src.conexao.HibernateUtil.java

Source

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package src.conexao;

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

/**
 *
 * @author Jordan-PC
 */
public class HibernateUtil {

    private static SessionFactory buildSessionFactory() {
        try {
            //objeto que armazena configuraes do hibernate.cfg.xml
            Configuration configuration = new Configuration();

            //mtodo que l e valida as configuraes em hibernate.cfg.xml
            configuration.configure();
            StandardServiceRegistryBuilder serviceRegistryBuilder = new StandardServiceRegistryBuilder();

            //aplica e carrega as configuraes no objeto serviceRegistry
            serviceRegistryBuilder.applySettings(configuration.getProperties());
            //objeto responsvel pela configuraes do hibernate.cfg.xml
            ServiceRegistry serviceRegistry = serviceRegistryBuilder.build();
            //cria uma ou mais instncias de sesso da configurao.
            //Geralmente uma aplicao tem uma nica instncia de sesso e threads servindo pedidos de clientes 
            //obtendo instncias da sesso do factory(fbrica) 
            //fabrica uma ou mais instncia de sesses de acesso ao banco a partir da configuraes do objeto serviceRegistry

            return configuration.buildSessionFactory(serviceRegistry);

        } catch (Throwable e) {
            throw new ExceptionInInitializerError("Criacao do objeto falhou: " + e);
        }
    }

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

    public static void shutdown() {
        // Close caches and connection pools
        getSessionFactory().close();
    }
}