Mercurial > dive4elements > river
annotate backend/src/main/java/org/dive4elements/river/backend/SessionHolder.java @ 8927:04ad2cfce559
ANother comment
author | gernotbelger |
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date | Thu, 01 Mar 2018 17:45:49 +0100 |
parents | 5c53b7de04d9 |
children | 0a5239a1e46e |
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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 session.close(); |
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54 } else { |
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55 log.error("release() called on NULL session."); |
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56 } |
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57 HOLDER.remove(); |
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58 } |
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59 } |
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60 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |