ORM Concept ~ Hibernate

Official Documentation for the Hibernate. 📚

• hibernate.org/orm
• Hibernate ORM 6.2.6 Final User Guide

Key Sections. 🚩

• Hibernate Diagram.pdf
• Native hibernate bootstrapping
• CRUD operations
• Relationships (One2One | One2Many | Many2Many)
• Javafx-fxml with Hibernate
• Query Languages (HQL Vs. SQL)

How to get Repository.

1. Install Git on your computer: https://git-scm.com/downloads
2. Then on your terminal. Run 👇

git clone https://github.com/DanujaV/hibernate-and-jpa-cmjd100.git

Session Factory

//import lk.ijse.query.entity.Customer;
import org.hibernate.SessionFactory;
import org.hibernate.boot.Metadata;
import org.hibernate.boot.MetadataSources;
import org.hibernate.boot.model.naming.ImplicitNamingStrategyJpaCompliantImpl;
import org.hibernate.boot.registry.StandardServiceRegistry;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;

public class HibernateUtil {    //Session Factory
    private static final SessionFactory sessionFactory = buildSessionFactory();

    private static SessionFactory buildSessionFactory() {
        StandardServiceRegistry standardRegistry = new StandardServiceRegistryBuilder()
        //      .configure("/hibernate.cfg.xml")
                .loadProperties("/application.properties")
                .build();

        Metadata metadata = new MetadataSources(standardRegistry)
        //       .addAnnotatedClass(Customer.class)
                .getMetadataBuilder()
                .applyImplicitNamingStrategy(ImplicitNamingStrategyJpaCompliantImpl.INSTANCE)
                .build();

        SessionFactory sessionFactory = metadata.getSessionFactoryBuilder()
                .build();

        return sessionFactory;
    }

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

Factory Configuration

• XML Configuration

<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
    "-//Hibernate/Hibernate Configuration DTD//EN"
    "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
  <session-factory>
    <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
    <property name="hibernate.connection.driver_class">com.mysql.cj.jdbc.Driver</property>
    <property name="hibernate.connection.url">jdbc:mysql://localhost:3306/nh_cmjd100?createDatabaseIfNotExist=true</property>
    <property name="hibernate.connection.username">root</property>
    <property name="hibernate.connection.password">password</property>
    <property name="hibernate.show_sql">true</property>
    <property name="hibernate.format_sql">true</property>
    <property name="hibernate.hbm2ddl.auto">update</property>-->
  </session-factory>
</hibernate-configuration>

OR

• Resource Bundle Configuration

#key=value pairing

hibernate.dialect=org.hibernate.dialect.MySQLDialect
hibernate.connection.driver_class=com.mysql.cj.jdbc.Driver
hibernate.connection.url=jdbc:mysql://localhost:3306/cmjd100_thogakade?createDatabaseIfNotExist=true
hibernate.connection.username=root
hibernate.connection.password=password
hibernate.show_sql=true
hibernate.format_sql=true
hibernate.hbm2ddl.auto=update

License. 🛡️

Copyright 2023 CMJD. All Rights Reserved.