com.shoppingcart.persistance.InvoiceDAO.java Source code

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Here is the source code for com.shoppingcart.persistance.InvoiceDAO.java

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/*
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package com.shoppingcart.persistance;

import com.shoppingcart.pojo.Invoice;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistry;
import org.hibernate.service.ServiceRegistryBuilder;

/**
 *
 * @author janith
 */
public class InvoiceDAO {

    private static InvoiceDAO instance = null;
    private final SessionFactory sessionFactory;

    private InvoiceDAO() {
        Configuration configuration = new Configuration();
        configuration.configure("hibernate.cfg.xml");
        ServiceRegistry serviceRegistry = new ServiceRegistryBuilder().applySettings(configuration.getProperties())
                .build();
        sessionFactory = configuration.buildSessionFactory(serviceRegistry);
    }

    public static InvoiceDAO getInstance() {
        if (instance == null) {
            instance = new InvoiceDAO();
        }
        return instance;
    }

    public boolean saveInvoice(Invoice invoice) {
        Session session = null;
        Transaction tx = null;
        boolean success = false;
        try {
            session = sessionFactory.openSession();
            tx = session.beginTransaction();
            session.save(invoice);
            tx.commit();
            success = true;
        } catch (Exception e) {
            System.out.println(e);
            tx.rollback();
            success = false;
        } finally {
            session.close();
        }
        return success;
    }
}