[jboss-user] [EJB 3.0] - Hypersonic data are all erased after jboss is restarted

[peiguo]

The following code does persist data (orders and order lines) to database, and I did see that. The problem is that the data were all erased once jboss is restarted. How can I change that?

I have a persistencein META-INF directory: 

  | <persistence 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"
  |    version="1.0">
  |    <persistence-unit name="sample">
  |       <jta-data-source>java:/DefaultDS</jta-data-source>
  |       <properties>
  |          <property name="hibernate.dialect" value="org.hibernate.dialect.HSQLDialect"/>
  |          <property name="hibernate.hbm2ddl.auto" value="create-drop"/>
  |       </properties>
  |    </persistence-unit>
  | </persistence>
  | 	 

in my stateful bean I have this code, and checkout was called from outside: 
 
  | 
  | package org.jboss.tutorial.entity.bean;
  | 
  | import javax.ejb.Remote;
  | import javax.ejb.Remove;
  | import javax.ejb.Stateful;
  | import javax.persistence.EntityManager;
  | import javax.persistence.PersistenceContext;
  | import javax.persistence.PersistenceContext;
  | 
  | 
  | @Stateful
  | @Remote(ShoppingCart.class)
  | public class ShoppingCartBean implements ShoppingCart, java.io.Serializable
  | {
  |    @PersistenceContext(unitName="sample")
  |    private EntityManager manager;
  |    private Order order;
  | 
  |    public void buy(String product, int quantity, double price)
  |    {
  |       if (order == null) order = new Order();
  |       order.addPurchase(product, quantity, price);
  |    }
  | 
  |    public Order getOrder()
  |    {
  |       return order;
  |    }
  | 
  |    @Remove
  |    public void checkout()
  |    {
  |       manager.persist(order);
  |    }
  | }
  | 	 


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