Mercurial > dive4elements > gnv-client
annotate geo-backend/src/main/java/de/intevation/gnv/geobackend/base/connectionpool/ConnectionPoolFactory.java @ 885:1c3efbd2fc5a
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geo-backend/trunk@850 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Mon, 29 Mar 2010 07:49:16 +0000 |
parents | 12f88239fb33 |
children | 8b442223741c |
rev | line source |
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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 |
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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. |
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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 |
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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(ConnectionPoolFactory.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 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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53 /** |
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54 * Getting the ConnectionPool |
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55 * @return the ConnectionPool |
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56 */ |
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57 public ConnectionPool getConnectionPool(){ |
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58 return this.connectionPool; |
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59 } |
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60 |
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61 /** |
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62 * Initializes the ConnectionPool. |
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63 * Should only be called once on system startup |
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64 * @param properties the Properties for the Individual Configuration of the ConnectionPool |
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65 */ |
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66 public void initializeConnectionPool(Properties properties){ |
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67 log.debug("ConnectionPoolFactory.initializeConnectionPool"); |
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68 if (this.connectionPool == null){ |
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69 //TODO: Here it might be possible to switch the ConnectionPoolInstance using a FLAG. |
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70 this.connectionPool = new ArcSDEConnectionPool(); |
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71 this.connectionPool.initialize(properties); |
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72 }else{ |
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73 log.warn("ConnectionPool already initialized"); |
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74 } |
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75 } |
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76 |
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77 /** |
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78 * Checks if the ConnectionPool has already been initialized. |
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79 * @return true if the ConnectionPool is initialized. |
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80 */ |
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81 public boolean isInitialized(){ |
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82 return this.connectionPool != null; |
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83 } |
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84 } |