HibernateSessionFactory.java
资源名称:exams.rar [点击查看]
上传用户:nbxinmin
上传日期:2021-10-09
资源大小:46k
文件大小:3k
源码类别:
Internet/IE编程
开发平台:
Java
- package com.xdf.exams.dao.hibernate;
- import org.hibernate.HibernateException;
- import org.hibernate.Session;
- import org.hibernate.cfg.Configuration;
- /**
- * Configures and provides access to Hibernate sessions, tied to the
- * current thread of execution. Follows the Thread Local Session
- * pattern, see {@link http://hibernate.org/42.html }.
- */
- public class HibernateSessionFactory {
- /**
- * Location of hibernate.cfg.xml file.
- * Location should be on the classpath as Hibernate uses
- * #resourceAsStream style lookup for its configuration file.
- * The default classpath location of the hibernate config file is
- * in the default package. Use #setConfigFile() to update
- * the location of the configuration file for the current session.
- */
- 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() {
- }
- /**
- * Returns the ThreadLocal Session instance. Lazy initialize
- * the <code>SessionFactory</code> if needed.
- *
- * @return Session
- * @throws HibernateException
- */
- 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;
- }
- /**
- * Rebuild hibernate session factory
- *
- */
- public static void rebuildSessionFactory() {
- try {
- configuration.configure(configFile);
- sessionFactory = configuration.buildSessionFactory();
- } catch (Exception e) {
- System.err
- .println("%%%% Error Creating SessionFactory %%%%");
- e.printStackTrace();
- }
- }
- /**
- * Close the single hibernate session instance.
- *
- * @throws HibernateException
- */
- public static void closeSession() throws HibernateException {
- Session session = (Session) threadLocal.get();
- threadLocal.set(null);
- if (session != null) {
- session.close();
- }
- }
- /**
- * return session factory
- *
- */
- public static org.hibernate.SessionFactory getSessionFactory() {
- return sessionFactory;
- }
- /**
- * return session factory
- *
- * session factory will be rebuilded in the next call
- */
- public static void setConfigFile(String configFile) {
- HibernateSessionFactory.configFile = configFile;
- sessionFactory = null;
- }
- /**
- * return hibernate configuration
- *
- */
- public static Configuration getConfiguration() {
- return configuration;
- }
- }