teichmann@5844: /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
teichmann@5844:  * Software engineering by Intevation GmbH
teichmann@5844:  *
teichmann@5992:  * This file is Free Software under the GNU AGPL (>=v3)
teichmann@5844:  * and comes with ABSOLUTELY NO WARRANTY! Check out the
teichmann@5992:  * documentation coming with Dive4Elements River for details.
teichmann@5844:  */
teichmann@5844: 
teichmann@5829: package org.dive4elements.river.backend;
sascha@3333: 
tom@9726: import org.apache.logging.log4j.Logger;
tom@9726: import org.apache.logging.log4j.LogManager;
sascha@3333: 
sascha@3333: import org.hibernate.Session;
sascha@3333: import org.hibernate.SessionFactory;
sascha@3333: 
andre@8576: public class SedDBSessionHolder
sascha@3333: {
sascha@3333:     private static Logger log =
tom@9726:         LogManager.getLogger(SedDBSessionHolder.class);
sascha@3333: 
andre@8576:     public static final ThreadLocal<Session> HOLDER =
andre@8576:         new ThreadLocal<Session>() {
andre@8576:             @Override
andre@8576:             protected Session initialValue() {
andre@8576:                 Session session = create();
andre@8576:                 log.debug("Initial session value: " + session.hashCode());
andre@8576:                 return session;
andre@8576:             }
andre@8576:         };
andre@8576: 
sascha@3333:     public synchronized static Session create() {
sascha@3333:         log.debug("create");
sascha@3333:         SessionFactory sessionFactory =
sascha@3333:             SessionFactoryProvider.getSedDBSessionFactory();
sascha@3333:         return sessionFactory.openSession();
sascha@3333:     }
andre@8576: 
andre@8576:     public static Session acquire() {
andre@8576:         Session session = create();
andre@8576:         log.debug("acquired session: " + session.hashCode());
andre@8576:         HOLDER.set(session);
andre@8576:         return session;
andre@8576:     }
andre@8576: 
andre@8576:     public static void release() {
andre@8576:         Session session = HOLDER.get();
andre@8576:         if (session != null) {
andre@8576:             log.debug("releasing session: " + session.hashCode());
andre@8576:             session.close();
andre@8576:         } else {
andre@8576:             log.error("release() called on NULL session.");
andre@8576:         }
andre@8576:         HOLDER.remove();
andre@8576:     }
sascha@3333: }
sascha@3333: // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :