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annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/context/SessionCallContextListener.java @ 307:84f8462790cb

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