Session Disconnect And Reconnect : Hibernate Session « Hibernate « Java

1. Java
2. Hibernate
3. Hibernate Session

Session Disconnect And Reconnect

/////////////////////////////////////////////////////////////////////////
import java.util.*;

import java.sql.*;
import org.hibernate.*;
import org.hibernate.cfg.*;
import org.hibernate.criterion.*;

public class Main {
  
  public static void main(String[] args) {
    HibernateUtil.setup("create table Supplier ( id int, name VARCHAR);");
    HibernateUtil.setup("create table Product ( id int, name VARCHAR, description VARCHAR, price double,supplierId int);");
    
    prepareData();

        SessionFactory factory = new Configuration().configure().buildSessionFactory();
        Session session = factory.openSession();
        Query query = session.createQuery("from Product order by name");
        List list = query.list();
        Iterator i = list.iterator();
        while(i.hasNext()) {
           Product p = (Product)i.next();
           System.out.println(p.getName());
        }
        System.out.println("Step 1.");
        //session.close();
        
        session.disconnect();
        session.reconnect();
        query = session.createQuery("from Product order by name");
        list = query.list();
        i = list.iterator();
        while(i.hasNext()) {
           Product p = (Product)i.next();
           System.out.println(p.getName());
        }
        System.out.println("Step 2.");
    
        HibernateUtil.checkData("select * from Supplier");
        HibernateUtil.checkData("select * from Product");

  }
    static public void displaySupplierList(List list) {
        Iterator iter = list.iterator();
        if (!iter.hasNext()) {
            System.out.println("No suppliers to display.");
            return;
        }        
        while (iter.hasNext()) {
            Supplier supplier = (Supplier) iter.next();
            String msg = supplier.getName();
            System.out.println(msg);
        }
    }

 


  private static void prepareData(){
        Session session = HibernateUtil.currentSession();

        Supplier supplier1 = new Supplier();
        supplier1.setName("Supplier Name 1");
        session.save(supplier1);
        
        Supplier supplier2 = new Supplier();
        supplier2.setName("Supplier Name 2");
        session.save(supplier2);        
        
        Product product1 = new Product("Product 1","Name for Product 1", 2.0);
        product1.setSupplier(supplier1);
        supplier1.getProducts().add(product1);
        session.save(product1);
        
        Product product12 = new Product("Product 2","Name for Product 2", 22.0);
        product12.setSupplier(supplier1);
        supplier1.getProducts().add(product12);        
        session.save(product12);
        
        Product product2 = new Product("Product 3", "Name for Product 3", 30.0);
        product2.setSupplier(supplier2);
        supplier2.getProducts().add(product2);
        session.save(product2);
        
        session.flush();
        HibernateUtil.closeSession();
  }
}




/////////////////////////////////////////////////////////////////////////

public class Product
{
    private int id;
    private Supplier supplier;
    
    private String name;
    private String description;
    private double price;
    
    public Product()
    {
        super();
    }
    
    public Product(String name, String description, double price)
    {
        super();
        this.name = name;
        this.description = description;
        this.price = price;
    }
    
    public String getDescription()
    {
        return description;
    }
    public void setDescription(String description)
    {
        this.description = description;
    }
    public int getId()
    {
        return id;
    }
    public void setId(int id)
    {
        this.id = id;
    }
    public String getName()
    {
        return name;
    }
    public void setName(String name)
    {
        this.name = name;
    }
 
    public Supplier getSupplier()
    {
        return supplier;
    }
    public void setSupplier(Supplier supplier)
    {
        this.supplier = supplier;
    }
    
    public double getPrice()
    {
        return price;
    }
    public void setPrice(double price)
    {
        this.price = price;
    }
}



/////////////////////////////////////////////////////////////////////////
import java.util.ArrayList;
import java.util.List;

public class Supplier
{
    private int id;
    private String name;
    private List products = new ArrayList();
    
    public int getId()
    {
        return id;
    }
    public void setId(int id)
    {
        this.id = id;
    }
    public String getName()
    {
        return name;
    }
    public void setName(String name)
    {
        this.name = name;
    }
    public List getProducts()
    {
        return products;
    }
    public void setProducts(List products)
    {
        this.products = products;
    }
}

           
       

HibernateSessionDisconnectAndReconnect.zip( 3,693 k)

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