Mercurial > dive4elements > gnv-client
comparison geo-backend/src/main/java/de/intevation/gnv/geobackend/base/connectionpool/ConnectionPoolFactory.java @ 130:e4eacd613356
Implementierung Datenzugriff auf die ArcSDE über java.sql. Methodiken
ChangeLog wird nachgereicht da SubversionClientincompatiblitäten vorhanden sind.
geo-backend/trunk@7 c6561f87-3c4e-4783-a992-168aeb5c3f6f
| author | Tim Englich <tim.englich@intevation.de> |
|---|---|
| date | Wed, 02 Sep 2009 15:15:52 +0000 |
| parents | |
| children | 5a583cff97ea |
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| 129:110e3ac1b7d2 | 130:e4eacd613356 |
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| 1 /** | |
| 2 * | |
| 3 */ | |
| 4 package de.intevation.gnv.geobackend.base.connectionpool; | |
| 5 | |
| 6 import java.util.Properties; | |
| 7 | |
| 8 import org.apache.log4j.Logger; | |
| 9 | |
| 10 import de.intevation.gnv.geobackend.sde.connectionpool.ArcSDEConnectionPool; | |
| 11 | |
| 12 /** | |
| 13 * Factoryimplementation for the Interface ConnectionPool. | |
| 14 * This factory delivers Instances of the Interface ConnectionPool. | |
| 15 * @author Tim Englich <tim.englich@intevation.de> | |
| 16 */ | |
| 17 public class ConnectionPoolFactory { | |
| 18 | |
| 19 | |
| 20 /** | |
| 21 * the logger, used to log exceptions and additonaly information | |
| 22 */ | |
| 23 private static Logger log = Logger.getLogger(ConnectionPoolFactory.class); | |
| 24 | |
| 25 | |
| 26 /** | |
| 27 * The singleton Instance of this Factory. | |
| 28 */ | |
| 29 private static ConnectionPoolFactory instance = null; | |
| 30 | |
| 31 /** | |
| 32 * The ConnectionPool providing the Connections to the DatabaseBackends | |
| 33 */ | |
| 34 private ConnectionPool connectionPool = null; | |
| 35 | |
| 36 /** | |
| 37 * Basic-Constructor of this Class | |
| 38 */ | |
| 39 private ConnectionPoolFactory() { | |
| 40 super(); | |
| 41 } | |
| 42 | |
| 43 | |
| 44 /** | |
| 45 * This Method provides an singleton Instance of this Class. | |
| 46 * @return an singleton Instance of this Class | |
| 47 */ | |
| 48 public static ConnectionPoolFactory getInstance(){ | |
| 49 if (instance == null){ | |
| 50 instance = new ConnectionPoolFactory(); | |
| 51 } | |
| 52 return instance; | |
| 53 } | |
| 54 | |
| 55 | |
| 56 /** | |
| 57 * Getting the ConnectionPool | |
| 58 * @return the ConnectionPool | |
| 59 */ | |
| 60 public ConnectionPool getConnectionPool(){ | |
| 61 return this.connectionPool; | |
| 62 } | |
| 63 | |
| 64 | |
| 65 /** | |
| 66 * Initializes the ConnectionPool. | |
| 67 * Should only be called once on system startup | |
| 68 * @param properties the Properties for the Individual Configuration of the ConnectionPool | |
| 69 */ | |
| 70 public void initializeConnectionPool(Properties properties){ | |
| 71 log.debug("ConnectionPoolFactory.initializeConnectionPool"); | |
| 72 if (this.connectionPool == null){ | |
| 73 //TODO: Hier könnte anhand eines Flags die Instanz des Connectionpools umgeschaltet werden. | |
| 74 this.connectionPool = new ArcSDEConnectionPool(); | |
| 75 this.connectionPool.initialize(properties); | |
| 76 }else{ | |
| 77 log.warn("ConnectionPool already initialized"); | |
| 78 } | |
| 79 } | |
| 80 | |
| 81 /** | |
| 82 * Checks if the ConnectionPool has already been initialized. | |
| 83 * @return true if the ConnectionPool is initialized. | |
| 84 */ | |
| 85 public boolean isInitialized(){ | |
| 86 return this.connectionPool != null; | |
| 87 } | |
| 88 } |