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/osms/hibernate/utility and add the following lines so the application can interact
with Hibernate:
package com.hp.osms.hibernate.utility;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.cfg.Configuration;
public class HibernateSessionFactory {
private static String CONFIG_FILE_LOCATION = "/hibernate.cfg.xml";
private static final ThreadLocal<Session> threadLocal = new ThreadLocal<Session>();
private static Configuration configuration = new Configuration();
private static org.hibernate.SessionFactory sessionFactory;
private static String configFile = CONFIG_FILE_LOCATION;
private HibernateSessionFactory() {
}
public static Session getSession() throws HibernateException {
Session session = (Session) threadLocal.get();
if (session == null || !session.isOpen()) {
if (sessionFactory == null) {
rebuildSessionFactory();
}
session = (sessionFactory != null) ? sessionFactory.openSession():null;
threadLocal.set(session);
}
return session;
}
public static void rebuildSessionFactory() {
try {
configuration.configure(configFile);
sessionFactory = configuration.buildSessionFactory();
} catch (Exception e) {
System.err.println("Can not create SessionFactory!!");
e.printStackTrace();
}
}
public static void closeSession() throws HibernateException {
Session session = (Session) threadLocal.get();
threadLocal.set(null);
if (session != null)
session.close();
}
public static org.hibernate.SessionFactory getSessionFactory() {
return sessionFactory;
}
public static void setConfigFile(String configFile) {
HibernateSessionFactory.configFile = configFile;
sessionFactory = null;
}
}
6. Compile the HibernateSessionFactory.java file by entering the following commands:
# cd $CATALINA_HOME/webapps/SimpleDemo/WEB-INF/classes/com/hp \
/osms/hibernate/utility
# javac -cp $CATALINA_HOME/webapps/SimpleDemo \
/WEB-INF/lib/hibernate3.jar HibernateSessionFactory.java
The file HibernateSessionFactory.class is generated.
7. Create a Hibernate mapping file named Users.hbm.xml, in the directory
$CATALINA_HOME/webapps/SimpleDemo/WEB-INF/classes/com/hp/osms/hibernate
according to the definition in the USERS table that contains the following lines:
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="com.hp.osms.hibernate.Users" table="USERS">
<id name="userId" type="java.lang.Long">
<column name="USER_ID" precision="10" scale="0" />
<generator class="native">
<param name="sequence"> HIBERNATE_SEQUENCE</param>
</generator>
</id>
Installing, Configuring, and Managing Web Server Middleware Stack Components 39