Mercurial > dive4elements > gnv-client
annotate geo-backend/src/main/java/de/intevation/gnv/geobackend/base/query/DefaultQueryExceutor.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 | 9f2eaefe9dd4 |
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>
parents:
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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>
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4 package de.intevation.gnv.geobackend.base.query; |
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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.sql.Connection; |
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7 import java.sql.ResultSet; |
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8 import java.sql.SQLException; |
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9 import java.sql.Statement; |
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10 import java.util.Collection; |
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Tim Englich <tim.englich@intevation.de>
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11 |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
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12 import org.apache.log4j.Logger; |
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13 |
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14 import de.intevation.gnv.geobackend.base.Result; |
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15 import de.intevation.gnv.geobackend.base.connectionpool.ConnectionPool; |
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16 import de.intevation.gnv.geobackend.base.connectionpool.ConnectionPoolFactory; |
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17 import de.intevation.gnv.geobackend.base.connectionpool.exception.ConnectionException; |
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18 import de.intevation.gnv.geobackend.base.query.container.QueryContainerFactory; |
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19 import de.intevation.gnv.geobackend.base.query.container.exception.QueryContainerException; |
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20 import de.intevation.gnv.geobackend.base.query.exception.QueryException; |
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21 |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
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22 /** |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
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23 * This is an Standard Implementation of the Interface QueryExecutor. |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
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24 * It fetchs the Query from the Querycontainer an put the Filtervalues into the Query. |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
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25 * @author Tim Englich <tim.englich@intevation.de> |
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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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26 * |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
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27 */ |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
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28 public class DefaultQueryExceutor extends QueryExecutorBase{ |
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29 |
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30 |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
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31 /** |
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32 * the logger, used to log exceptions and additonaly information |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
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33 */ |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
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34 private static Logger log = Logger.getLogger(DefaultQueryExceutor.class); |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
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35 |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
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36 /** |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
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37 * The ConnectionID identifing the Connection to use executing the Query. |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
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38 */ |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
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39 private String connectionID = "N/N"; |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
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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>
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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 * Constructor |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
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43 */ |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
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44 public DefaultQueryExceutor() { |
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45 super(); |
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46 } |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
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47 |
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48 /** |
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49 * @see de.intevation.gnv.geobackend.base.query.QueryExecutor#executeQuery(java.lang.String, java.lang.String[]) |
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50 */ |
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51 public Collection<Result> executeQuery(String queryID, String[] filter) throws QueryException { |
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52 Collection<Result> returnValue = null; |
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53 try { |
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54 String queryString = QueryContainerFactory.getInstance().getQueryContainer().getQuery(queryID); |
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55 if (queryString != null){ |
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56 if (filter != null && filter.length > 0){ |
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Implementation of the Datainfrastructure for fetching Data from different DataStores.
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57 //Insert the Filtervalues into the QueryString |
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58 queryString = super.setFilterValues(queryString, filter); |
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59 } |
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60 |
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61 Connection connection = null; |
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62 ConnectionPool connectionPool = ConnectionPoolFactory.getInstance().getConnectionPool(); |
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63 try { |
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64 // Submit the Query |
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65 connection = connectionPool.getConnection(this.connectionID); |
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66 if (connection != null){ |
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67 Statement stmt = connection.createStatement(); |
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68 ResultSet rs = stmt.executeQuery(queryString); |
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69 returnValue = super.createResultCollection(rs); |
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70 |
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71 }else{ |
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72 log.error("Could not establish Databaseconnection."); |
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73 throw new QueryException("Could not establish Databaseconnection."); |
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74 } |
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75 |
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76 } catch (ConnectionException e) { |
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77 log.error(e,e); |
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78 throw new QueryException("Could not establish Databaseconnection.",e); |
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79 } catch (SQLException e) { |
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80 log.error(e,e); |
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81 throw new QueryException(e); |
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82 }finally{ |
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83 if (connection != null){ |
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84 try { |
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85 connectionPool.closeConnection(connection); |
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86 } catch (ConnectionException e) { |
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87 log.error("Connection could not be returned to ConnectionPool."); |
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88 log.error(e,e); |
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89 } |
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90 } |
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91 } |
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92 }else{ |
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93 log.error("No QueryString defined for "+queryID); |
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94 throw new QueryException("Cannot get the Querystring"); |
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95 } |
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96 |
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97 } catch (QueryContainerException e) { |
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98 log.error(e,e); |
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99 throw new QueryException("Cannot get the Querystring",e); |
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100 } |
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101 return returnValue; |
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102 } |
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103 } |