Mercurial > dive4elements > gnv-client

annotate gnv/src/main/java/de/intevation/gnv/action/sessionmodel/SessionModelFactory.java @ 8:65ff6fcfee0c

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Some Basic Stuff for WebProjects gnv/trunk@84 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Tim Englich <tim.englich@intevation.de>
date Mon, 14 Sep 2009 13:56:03 +0000
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children 4405f31bbc30
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1 /**
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2 *
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3 */
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4 package de.intevation.gnv.action.sessionmodel;
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5
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6 import javax.servlet.http.HttpServletRequest;
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7
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8 import org.apache.log4j.Logger;
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9
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10 import de.intevation.gnv.artifactdatabase.client.DefaultArtifactDatabaseClient;
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11
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12 /**
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13 * @author Tim Englich <tim.englich@intevation.de>
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14 *
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15 */
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16 public class SessionModelFactory {
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17
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18 public final static String SESSION_MODEL_ID = "de.intevation.gnv.action.sessionmodel.SessionModel.ID";
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19 /**
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20 * the logger, used to log exceptions and additonaly information
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21 */
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22 private static Logger log = Logger.getLogger(SessionModelFactory.class);
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23
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24
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25 /**
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26 * The singleton Instance of this Factory.
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27 */
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28 private static SessionModelFactory instance = null;
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29
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30 /**
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31 * Constructor
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32 */
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33 private SessionModelFactory() {
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34 super();
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35 }
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36
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37 /**
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38 * This Method provides an singleton Instance of this Class.
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39 * @return an singleton Instance of this Class
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40 */
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41 public static SessionModelFactory getInstance(){
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42 if (instance == null){
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43 instance = new SessionModelFactory();
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44 }
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45 return instance;
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46 }
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47
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48
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49 /**
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50 * Getting the ArtifactDatabaseClient
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51 * @return the ArtifactDatabaseClient
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52 */
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53 public SessionModel getSessionModel(HttpServletRequest request){
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54 synchronized (this.getClass()) {
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55 SessionModel sm = null;
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56 if (request.getSession().getAttribute(SESSION_MODEL_ID)!= null){
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57 sm = (SessionModel)request.getSession().getAttribute(SESSION_MODEL_ID);
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58 ;
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59 }else{
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60 sm = new DefaultSessionModel();
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61 request.getSession().setAttribute(SESSION_MODEL_ID, sm);
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62 }
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63
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64 return sm;
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65 }
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66 }
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67
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68 }
http://dive4elements.wald.intevation.org