Mercurial > dive4elements > gnv-client

annotate gnv/src/main/java/de/intevation/gnv/action/sessionmodel/SessionModelFactory.java @ 683:d49e8695786c

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Ordered imports. Removed needless imports. Removed empty headers. gnv/trunk@855 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Mon, 29 Mar 2010 09:10:25 +0000
parents 15ac78a91d1b
children 57fa8019fbdc
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1 package de.intevation.gnv.action.sessionmodel;
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2
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3 import javax.servlet.http.HttpServletRequest;
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5 import org.apache.log4j.Logger;
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7 /**
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8 * @author Tim Englich <tim.englich@intevation.de>
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9 *
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10 */
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11 public class SessionModelFactory {
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13 public final static String SESSION_MODEL_ID = "de.intevation.gnv.action.sessionmodel.SessionModel.ID";
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14 /**
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15 * the logger, used to log exceptions and additonaly information
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16 */
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17 private static Logger log = Logger.getLogger(SessionModelFactory.class);
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19 /**
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20 * The singleton Instance of this Factory.
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21 */
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22 private static SessionModelFactory instance = null;
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23
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24 /**
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25 * Constructor
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26 */
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27 private SessionModelFactory() {
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28 super();
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29 }
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30
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31 /**
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32 * This Method provides an singleton Instance of this Class.
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33 *
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34 * @return an singleton Instance of this Class
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35 */
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36 public synchronized static SessionModelFactory getInstance() {
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37 if (instance == null) {
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38 instance = new SessionModelFactory();
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39 }
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40 return instance;
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41 }
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42
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43 /**
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44 * Getting the ArtifactDatabaseClient
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45 *
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46 * @return the ArtifactDatabaseClient
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47 */
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48 public SessionModel getSessionModel(HttpServletRequest request) {
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49 synchronized (request) {
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50 SessionModel sm = null;
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51 Object obj = request.getSession().getAttribute(SESSION_MODEL_ID);
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52 if (obj instanceof SessionModel) {
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53 sm = (SessionModel) obj;
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54 } else {
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55 sm = new DefaultSessionModel();
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56 request.getSession().setAttribute(SESSION_MODEL_ID, sm);
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57 }
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58
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59 return sm;
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60 }
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61 }
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63 }
http://dive4elements.wald.intevation.org