Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/artifacts/context/SessionCallContextListener.java @ 8566:fe7e9da6312a

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(issue1797) Move close into session release and guard it. To avoid leaking open and Held sessions we centrally close the session in the SessionHolder on release. This also removes some duplicated code in SedDBSessionHolder
author Andre Heinecke <andre.heinecke@intevation.de>
date Tue, 24 Feb 2015 17:16:14 +0100
parents e4606eae8ea5
children 0a5239a1e46e
rev   line source
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Sascha L. Teichmann <teichmann@intevation.de>
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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.artifacts.context;
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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.w3c.dom.Document;
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14 import org.w3c.dom.Node;
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15
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16 import org.hibernate.Session;
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17
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18 import org.dive4elements.river.backend.SessionHolder;
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19
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20 import org.dive4elements.artifacts.CallContext;
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21 import org.dive4elements.artifacts.CallContext.Listener;
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22
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23
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24 /**
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25 * This CallContextListener is used to initialize a ThreadLocal variable in
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26 * each CallContext (for each request) that holds Sessions.
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27 *
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28 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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29 */
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30 public class SessionCallContextListener implements Listener {
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31
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32 public static final String SESSION_KEY = "context.session";
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33
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34 /** The log that is used in this class.*/
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35 private static Logger log =
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36 Logger.getLogger(SessionCallContextListener.class);
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39 public SessionCallContextListener() {
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40 }
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42
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43 public void setup(Document config, Node listenerConfig) {
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44 // nothing to do here
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45 }
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46
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47
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48 /**
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49 * Initializes a ThreadLocal variable that is used to hold sessions.
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50 *
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51 * @param context The CallContext.
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52 */
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53 public void init(CallContext context) {
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54 log.debug("SessionCallContextListener.init");
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55
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56 Session session = SessionHolder.acquire();
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57
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58 context.putContextValue(SESSION_KEY, session);
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59 }
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62 /**
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63 * Closes open sessions of the ThreadLocal variable opened in init().
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64 *
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65 * @param context The CallContext.
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66 */
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67 public void close(CallContext context) {
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68 log.debug("SessionCallContextListener.close");
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69
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70 SessionHolder.release();
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71 }
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72 }
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73 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org