Mercurial > dive4elements > gnv-client
annotate geo-backend/src/main/java/de/intevation/gnv/geobackend/base/query/container/QueryContainerFactory.java @ 132:5a583cff97ea
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> |
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date | Fri, 04 Sep 2009 08:11:30 +0000 |
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children | 3cbf11c67fdc |
rev | line source |
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132
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
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1 /** |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
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2 * |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
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3 */ |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
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4 package de.intevation.gnv.geobackend.base.query.container; |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
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5 |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
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6 import java.util.Properties; |
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7 |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
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8 import org.apache.log4j.Logger; |
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9 |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
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10 import de.intevation.gnv.geobackend.base.query.container.exception.QueryContainerException; |
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Tim Englich <tim.englich@intevation.de>
parents:
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11 |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
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12 /** |
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Tim Englich <tim.englich@intevation.de>
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13 * @author Tim Englich <tim.englich@intevation.de> |
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14 * |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
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15 */ |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
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16 public class QueryContainerFactory { |
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17 |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
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18 /** |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
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19 * the logger, used to log exceptions and additonaly information |
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20 */ |
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21 private static Logger log = Logger.getLogger(QueryContainerFactory.class); |
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22 |
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23 |
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24 /** |
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25 * The singleton Instance of this Factory. |
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26 */ |
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27 private static QueryContainerFactory instance = null; |
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28 |
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29 /** |
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30 * The ConnectionPool providing the Connections to the DatabaseBackends |
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31 */ |
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32 private QueryContainer queryContainer = null; |
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33 |
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34 /** |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
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35 * Basic-Constructor of this Class |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
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36 */ |
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37 private QueryContainerFactory() { |
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38 super(); |
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39 } |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
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40 |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
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41 /** |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
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42 * This Method provides an singleton Instance of this Class. |
5a583cff97ea
Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
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43 * @return an singleton Instance of this Class |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
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44 */ |
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Tim Englich <tim.englich@intevation.de>
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45 public static QueryContainerFactory getInstance(){ |
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46 if (instance == null){ |
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47 instance = new QueryContainerFactory(); |
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48 } |
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49 return instance; |
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Tim Englich <tim.englich@intevation.de>
parents:
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50 } |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
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51 |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
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52 |
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parents:
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53 /** |
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54 * Getting the QueryContainer |
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55 * @return the QueryContainer |
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56 */ |
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57 public QueryContainer getQueryContainer(){ |
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58 return this.queryContainer; |
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59 } |
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60 |
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61 /** |
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62 * Initializes the QueryContainer. |
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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 QueryContainerbb |
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65 * @throws QueryContainerException |
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66 */ |
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67 public synchronized void initializeQueryContainer(Properties properties) throws QueryContainerException{ |
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68 log.debug("ConnectionPoolFactory.initializeConnectionPool"); |
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69 if (this.queryContainer == null){ |
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70 this.queryContainer = new DefaultQueryContainer(); |
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71 this.queryContainer.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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Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
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75 } |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
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76 |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
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77 /** |
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Tim Englich <tim.englich@intevation.de>
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78 * Checks if the QueryContainer has already been initialized. |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
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79 * @return true if the QueryContainer is initialized. |
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Tim Englich <tim.englich@intevation.de>
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80 */ |
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81 public boolean isInitialized(){ |
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82 return this.queryContainer != null; |
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Tim Englich <tim.englich@intevation.de>
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83 } |
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84 } |