Mercurial > dive4elements > river
comparison 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> |
|---|---|
| date | Thu, 14 Apr 2011 11:18:28 +0000 |
| parents | |
| children | 084995dd1c9c |
comparison
equal
deleted
inserted
replaced
| 306:35301cc3b875 | 307:84f8462790cb |
|---|---|
| 1 package de.intevation.flys.artifacts.context; | |
| 2 | |
| 3 import org.apache.log4j.Logger; | |
| 4 | |
| 5 import org.hibernate.Session; | |
| 6 import org.hibernate.SessionFactory; | |
| 7 | |
| 8 import de.intevation.flys.backend.SessionFactoryProvider; | |
| 9 | |
| 10 import de.intevation.artifacts.CallContext; | |
| 11 import de.intevation.artifacts.CallContext.Listener; | |
| 12 | |
| 13 | |
| 14 /** | |
| 15 * This CallContextListener is used to initialize a ThreadLocal variable in | |
| 16 * each CallContext (for each request) that holds Sessions. | |
| 17 * | |
| 18 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> | |
| 19 */ | |
| 20 public class SessionCallContextListener implements Listener { | |
| 21 | |
| 22 public static final String SESSION_HOLDER_KEY = "context.session.holder"; | |
| 23 | |
| 24 /** The logger that is used in this class.*/ | |
| 25 private static Logger logger = | |
| 26 Logger.getLogger(SessionCallContextListener.class); | |
| 27 | |
| 28 | |
| 29 public SessionCallContextListener() { | |
| 30 } | |
| 31 | |
| 32 | |
| 33 /** | |
| 34 * Initializes a ThreadLocal variable that is used to hold sessions. | |
| 35 * | |
| 36 * @param context The CallContext. | |
| 37 */ | |
| 38 public void init(CallContext context) { | |
| 39 logger.debug("SessionCallContextListener.init"); | |
| 40 | |
| 41 ThreadLocal<Session> sessionHolder = new ThreadLocal<Session>(); | |
| 42 | |
| 43 SessionFactory sessionFactory = | |
| 44 SessionFactoryProvider.createSessionFactory(); | |
| 45 | |
| 46 Session session = sessionFactory.openSession(); | |
| 47 | |
| 48 sessionHolder.set(session); | |
| 49 | |
| 50 context.putContextValue(SESSION_HOLDER_KEY, sessionHolder); | |
| 51 } | |
| 52 | |
| 53 | |
| 54 /** | |
| 55 * Closes open sessions of the ThreadLocal variable opened in init(). | |
| 56 * | |
| 57 * @param context The CallContext. | |
| 58 */ | |
| 59 public void close(CallContext context) { | |
| 60 logger.debug("SessionCallContextListener.close"); | |
| 61 | |
| 62 ThreadLocal<Session> sessionHolder = (ThreadLocal<Session>) | |
| 63 context.getContextValue(SESSION_HOLDER_KEY); | |
| 64 | |
| 65 Session session = sessionHolder.get(); | |
| 66 | |
| 67 session.close(); | |
| 68 sessionHolder.remove(); | |
| 69 } | |
| 70 } | |
| 71 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 : |