Mercurial > dive4elements > river
view flys-artifacts/src/main/java/de/intevation/flys/artifacts/context/SessionCallContextListener.java @ 307:84f8462790cb
Added an Implementation of CallContext.Listener to open/close Hibernate Sessions for each request.
flys-artifacts/trunk@1687 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
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date | Thu, 14 Apr 2011 11:18:28 +0000 |
parents | |
children | 084995dd1c9c |
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package de.intevation.flys.artifacts.context; import org.apache.log4j.Logger; import org.hibernate.Session; import org.hibernate.SessionFactory; import de.intevation.flys.backend.SessionFactoryProvider; import de.intevation.artifacts.CallContext; import de.intevation.artifacts.CallContext.Listener; /** * This CallContextListener is used to initialize a ThreadLocal variable in * each CallContext (for each request) that holds Sessions. * * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> */ public class SessionCallContextListener implements Listener { public static final String SESSION_HOLDER_KEY = "context.session.holder"; /** The logger that is used in this class.*/ private static Logger logger = Logger.getLogger(SessionCallContextListener.class); public SessionCallContextListener() { } /** * Initializes a ThreadLocal variable that is used to hold sessions. * * @param context The CallContext. */ public void init(CallContext context) { logger.debug("SessionCallContextListener.init"); ThreadLocal<Session> sessionHolder = new ThreadLocal<Session>(); SessionFactory sessionFactory = SessionFactoryProvider.createSessionFactory(); Session session = sessionFactory.openSession(); sessionHolder.set(session); context.putContextValue(SESSION_HOLDER_KEY, sessionHolder); } /** * Closes open sessions of the ThreadLocal variable opened in init(). * * @param context The CallContext. */ public void close(CallContext context) { logger.debug("SessionCallContextListener.close"); ThreadLocal<Session> sessionHolder = (ThreadLocal<Session>) context.getContextValue(SESSION_HOLDER_KEY); Session session = sessionHolder.get(); session.close(); sessionHolder.remove(); } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :