Mercurial > dive4elements > gnv-client
comparison gnv/src/main/java/de/intevation/gnv/action/sessionmodel/SessionModelFactory.java @ 8:65ff6fcfee0c
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 |
| parents | |
| children | 4405f31bbc30 |
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| 7:fe6a64545552 | 8:65ff6fcfee0c |
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| 1 /** | |
| 2 * | |
| 3 */ | |
| 4 package de.intevation.gnv.action.sessionmodel; | |
| 5 | |
| 6 import javax.servlet.http.HttpServletRequest; | |
| 7 | |
| 8 import org.apache.log4j.Logger; | |
| 9 | |
| 10 import de.intevation.gnv.artifactdatabase.client.DefaultArtifactDatabaseClient; | |
| 11 | |
| 12 /** | |
| 13 * @author Tim Englich <tim.englich@intevation.de> | |
| 14 * | |
| 15 */ | |
| 16 public class SessionModelFactory { | |
| 17 | |
| 18 public final static String SESSION_MODEL_ID = "de.intevation.gnv.action.sessionmodel.SessionModel.ID"; | |
| 19 /** | |
| 20 * the logger, used to log exceptions and additonaly information | |
| 21 */ | |
| 22 private static Logger log = Logger.getLogger(SessionModelFactory.class); | |
| 23 | |
| 24 | |
| 25 /** | |
| 26 * The singleton Instance of this Factory. | |
| 27 */ | |
| 28 private static SessionModelFactory instance = null; | |
| 29 | |
| 30 /** | |
| 31 * Constructor | |
| 32 */ | |
| 33 private SessionModelFactory() { | |
| 34 super(); | |
| 35 } | |
| 36 | |
| 37 /** | |
| 38 * This Method provides an singleton Instance of this Class. | |
| 39 * @return an singleton Instance of this Class | |
| 40 */ | |
| 41 public static SessionModelFactory getInstance(){ | |
| 42 if (instance == null){ | |
| 43 instance = new SessionModelFactory(); | |
| 44 } | |
| 45 return instance; | |
| 46 } | |
| 47 | |
| 48 | |
| 49 /** | |
| 50 * Getting the ArtifactDatabaseClient | |
| 51 * @return the ArtifactDatabaseClient | |
| 52 */ | |
| 53 public SessionModel getSessionModel(HttpServletRequest request){ | |
| 54 synchronized (this.getClass()) { | |
| 55 SessionModel sm = null; | |
| 56 if (request.getSession().getAttribute(SESSION_MODEL_ID)!= null){ | |
| 57 sm = (SessionModel)request.getSession().getAttribute(SESSION_MODEL_ID); | |
| 58 ; | |
| 59 }else{ | |
| 60 sm = new DefaultSessionModel(); | |
| 61 request.getSession().setAttribute(SESSION_MODEL_ID, sm); | |
| 62 } | |
| 63 | |
| 64 return sm; | |
| 65 } | |
| 66 } | |
| 67 | |
| 68 } |