Mercurial > dive4elements > gnv-client

annotate geo-backend/src/main/java/de/intevation/gnv/geobackend/base/connectionpool/ConnectionPoolFactory.java @ 132:5a583cff97ea

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Implementation of the Datainfrastructure for fetching Data from different DataStores. geo-backend/trunk@12 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Tim Englich <tim.englich@intevation.de>
date Fri, 04 Sep 2009 08:11:30 +0000
parents e4eacd613356
children 210716612c30
rev   line source
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e4eacd613356 Implementierung Datenzugriff auf die ArcSDE über java.sql. Methodiken
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1 /**
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2 *
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3 */
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4 package de.intevation.gnv.geobackend.base.connectionpool;
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5
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6 import java.util.Properties;
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7
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8 import org.apache.log4j.Logger;
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9
e4eacd613356 Implementierung Datenzugriff auf die ArcSDE über java.sql. Methodiken
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10 import de.intevation.gnv.geobackend.sde.connectionpool.ArcSDEConnectionPool;
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11
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12 /**
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13 * Factoryimplementation for the Interface ConnectionPool.
e4eacd613356 Implementierung Datenzugriff auf die ArcSDE über java.sql. Methodiken
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14 * This factory delivers Instances of the Interface ConnectionPool.
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15 * @author Tim Englich <tim.englich@intevation.de>
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16 */
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17 public class ConnectionPoolFactory {
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18
132
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19 /**
130
e4eacd613356 Implementierung Datenzugriff auf die ArcSDE über java.sql. Methodiken
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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(ConnectionPoolFactory.class);
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23
130
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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 ConnectionPoolFactory instance = null;
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29
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30 /**
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31 * The ConnectionPool providing the Connections to the DatabaseBackends
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32 */
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33 private ConnectionPool connectionPool = null;
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34
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35 /**
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36 * Basic-Constructor of this Class
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37 */
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38 private ConnectionPoolFactory() {
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39 super();
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40 }
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41
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42 /**
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43 * This Method provides an singleton Instance of this Class.
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44 * @return an singleton Instance of this Class
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45 */
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46 public static ConnectionPoolFactory getInstance(){
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47 if (instance == null){
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48 instance = new ConnectionPoolFactory();
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49 }
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50 return instance;
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51 }
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52
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53
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54 /**
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55 * Getting the ConnectionPool
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56 * @return the ConnectionPool
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57 */
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58 public ConnectionPool getConnectionPool(){
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59 return this.connectionPool;
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60 }
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61
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62 /**
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63 * Initializes the ConnectionPool.
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64 * Should only be called once on system startup
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65 * @param properties the Properties for the Individual Configuration of the ConnectionPool
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66 */
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67 public void initializeConnectionPool(Properties properties){
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68 log.debug("ConnectionPoolFactory.initializeConnectionPool");
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69 if (this.connectionPool == null){
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70 //TODO: Hier k�nnte anhand eines Flags die Instanz des Connectionpools umgeschaltet werden.
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71 this.connectionPool = new ArcSDEConnectionPool();
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72 this.connectionPool.initialize(properties);
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73 }else{
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74 log.warn("ConnectionPool already initialized");
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75 }
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76 }
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77
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78 /**
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79 * Checks if the ConnectionPool has already been initialized.
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80 * @return true if the ConnectionPool is initialized.
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81 */
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82 public boolean isInitialized(){
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83 return this.connectionPool != null;
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84 }
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85 }
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