TopLink Essentials - The Java Persistence API Implementation at GlassFish

JSR 220 - Java Persistence API
TopLink Essentials
Oracle TopLink Essentials JPA library
TopLink Essentials JPA Extensions Reference
Using Java Persistence API Within a Visual Web JSF Application
toplink-essentials.jar
toplink-essentials-agent.jar

Apache Derby JDBC driver
derby.jar

--Entity - Usr.java

@javax.persistence.Entity
public class Usr {  
  @javax.persistence.Id
  private int id;
  private String name;
  public Usr() {}
  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;}
}

--META-INF/persistence.xml

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="1.0" xmlns="http://java.sun.com/xml/ns/persistence">
  <persistence-unit name="toplink-essentials" transaction-type="RESOURCE_LOCAL">
    <provider>oracle.toplink.essentials.PersistenceProvider</provider>
    <class>Usr</class>
    <properties>
      <property name="toplink.jdbc.driver" value="org.apache.derby.jdbc.EmbeddedDriver" />
      <property name="toplink.jdbc.url" value="jdbc:derby:testdb;create=true" />
      <property name="toplink.jdbc.user" value="user"/>
      <property name="toplink.jdbc.password" value="password"/>
      <property name="toplink.ddl-generation" value="drop-and-create-tables" />
      <property name="toplink.logging.level" value="FINE" />
    </properties>
  </persistence-unit>
</persistence>

--Main class

import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;

public class Main {

  public static void main(String[] args) {
    EntityManagerFactory emf = Persistence
        .createEntityManagerFactory("toplink-essentials");
    try {
      EntityManager em = emf.createEntityManager();
      Usr user = new Usr();
      user.setId(1);
      user.setName("hello world");
      em.getTransaction().begin();
      try {
        em.persist(user);
        em.flush();
      } finally {
        em.getTransaction().commit();
      }
    } finally {
      emf.close();
    }
  }
}

/* Stdout
  ...
  --INSERT INTO USR (ID, NAME) VALUES (?, ?)
 bind => [1, hello world]
*/