How do I configure a servlet in Eclipse to use a JPA project?

I am using Eclipse Galileo and I wanted to deploy a simple application using JPA, GlassFish 2.1 and MySQL 5. Unfortunately, I could not find any tutorials for GlassFish 2.1 (3.0 only, but I cannot use it).

I created a JPA project, added a MySQL5 connection and created an Entity from the database.

Generated JPA class:

package model;

import java.io.Serializable;
import javax.persistence.*;

@Entity
@Table(name="customer")
public class Customer implements Serializable {
 private static final long serialVersionUID = 1L;

 @Id
 @Column(name="customer_id")
 private int customerId;

 private String email;

 @Column(name="first_name")
 private String firstName;

 @Column(name="last_name")
 private String lastName;

    public Customer() {
    }

 public int getCustomerId() {
  return this.customerId;
 }

 public void setCustomerId(int customerId) {
  this.customerId = customerId;
 }

 public String getEmail() {
  return this.email;
 }

 public void setEmail(String email) {
  this.email = email;
 }

 public String getFirstName() {
  return this.firstName;
 }

 public void setFirstName(String firstName) {
  this.firstName = firstName;
 }

 public String getLastName() {
  return this.lastName;
 }

 public void setLastName(String lastName) {
  this.lastName = lastName;
 }

}

      

        
        
        
      

    

And the persistence.xml file:

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="1.0" xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd">
 <persistence-unit name="JPAProject2">
  <class>model.Customer</class>
 </persistence-unit>
</persistence>

      

        
        
        
      

    

I created a dynamic web project and added a new Servlet class that looks like this:

package servlet;    
import java.io.IOException;    
import javax.annotation.Resource;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.PersistenceUnit;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.transaction.UserTransaction;    
import model.Customer;

public class JpaDemoServlet2 extends HttpServlet 
{
 private static final long serialVersionUID = 1L;

 @PersistenceUnit
 private EntityManagerFactory entityManagerFactory;
 @Resource
 private UserTransaction userTransaction;

    public JpaDemoServlet2() 
    {
        super();
    }

 protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException 
 {
  EntityManager entityManager =
   entityManagerFactory.createEntityManager();

  Customer customer = new Customer();
  customer.setCustomerId(3);
  customer.setFirstName("Smith");
  customer.setLastName("John");
  customer.setEmail("john.smith@email.com");

  try
  {
   userTransaction.begin();
   entityManager.persist(customer);  
   userTransaction.commit();
  }
  catch(Exception ex)
  {
   response.sendError(1, ex.getMessage());
  }

 }

}

      

        
        
        
      

    

I have added project references and module dependencies for the JPA project to the servlet project properties. Should there be any other configuration settings? So far, I was able to publish the servlet, but unfortunately I cannot get it to run. http: // localhost: 4848 / ServletProject2 , I get "Hello, World!" post, but if I want to access http: // localhost: 4848 / ServletProject2 / JpaDemoServlet2 I get this exception:

Exception [TOPLINK-4002] (Oracle TopLink Essentials - 2.1 (Build b60e-fcs (12/23/2008))): oracle.toplink.essentials.exceptions.DatabaseException
Internal Exception: java.sql.SQLException: Error in allocating a connection. Cause: Connection could not be allocated because: java.net.ConnectException : Error connecting to server localhost on port 1527 with message Connection refused: connect.
Error Code: 0

      

        
        
        
      

    

Is there something I am missing?