Mercurial > dive4elements > river

annotate backend/src/main/java/org/dive4elements/river/backend/SessionHolder.java @ 8567:9bbce0edd36b

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(issue1797) Increase session debug output
author Andre Heinecke <andre.heinecke@intevation.de>
date Tue, 24 Feb 2015 18:32:18 +0100
parents fe7e9da6312a
children 5c53b7de04d9
rev   line source
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Sascha L. Teichmann <teichmann@intevation.de>
parents: 5838
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1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
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2 * Software engineering by Intevation GmbH
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3 *
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4 * This file is Free Software under the GNU AGPL (>=v3)
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5 * and comes with ABSOLUTELY NO WARRANTY! Check out the
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6 * documentation coming with Dive4Elements River for details.
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7 */
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8
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9 package org.dive4elements.river.backend;
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10
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11 import org.apache.log4j.Logger;
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12
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13 import org.hibernate.Session;
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14 import org.hibernate.SessionFactory;
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15
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16
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17 public class SessionHolder
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18 {
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19 private static Logger log =
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20 Logger.getLogger(SessionHolder.class);
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21
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22 public static final ThreadLocal<Session> HOLDER =
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23 new ThreadLocal<Session>() {
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24 @Override
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25 protected Session initialValue() {
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26 Session session = create();
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27 log.debug("Initial session value: " + session.hashCode());
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28 return session;
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29 }
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30 };
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31
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32 protected SessionHolder() {
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33 }
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34
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35 public synchronized static Session create() {
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36 log.debug("create");
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37 SessionFactory sessionFactory =
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38 SessionFactoryProvider.getSessionFactory();
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39 return sessionFactory.openSession();
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40 }
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41
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42 public static Session acquire() {
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43 Session session = create();
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44 log.debug("acquired session: " + session.hashCode());
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45 HOLDER.set(session);
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46 return session;
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47 }
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48
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49 public static void release() {
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50 Session session = HOLDER.get();
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51 if (session != null) {
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52 log.debug("releasing session: " + session.hashCode());
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53 try {
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54 if (!session.isOpen()) {
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55 /* If this check really works in all cases why does hibernate
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56 * does not use it when you call close anyway. */
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57 log.debug("Session is not open. Calling close anyway.");
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58 }
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59 session.close();
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60 } catch (Exception e) {
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61 /* Do not try this at home. But hibernate may fail with an NPE
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62 * or any other exception depending on the state of the session.
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63 * According to doc this should only throw a HibernateException but
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64 * we definetely get NPE's here.
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65 */
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66 log.error("Exception caught on session close! Session already closed?" + e.getMessage());
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67 }
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68 } else {
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69 log.debug("release called on NULL session.");
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70 }
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71 HOLDER.remove();
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72 }
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73 }
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74 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org