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