Mercurial > dive4elements > river

annotate flys-backend/src/main/java/de/intevation/flys/importer/ImportWst.java @ 478:db430bd9e0e0

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Implemented a WstColumnValue cache to speed up inserting WST files into database. flys-backend/trunk@1734 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Wed, 20 Apr 2011 07:21:03 +0000
parents 5d920695a7f0
children 3a99d0295006
rev   line source
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a33c065b95eb Added importer helper model stubs for WST imports.
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1 package de.intevation.flys.importer;
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2
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3 import de.intevation.flys.model.Wst;
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4 import de.intevation.flys.model.WstColumnValue;
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5 import de.intevation.flys.model.River;
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6
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7 import de.intevation.flys.backend.SessionFactoryProvider;
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8
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9 import org.apache.log4j.Logger;
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11 import org.hibernate.Session;
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12 import org.hibernate.SessionFactory;
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13 import org.hibernate.Query;
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14
478
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15 import java.util.ArrayList;
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16 import java.util.HashMap;
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17 import java.util.List;
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18 import java.util.Map;
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19
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20 public class ImportWst
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21 {
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22 private static Logger logger = Logger.getLogger(ImportWst.class);
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24 protected String description;
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26 protected Integer kind;
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27
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28 //protected Map<String, ImportWstColumn> columns;
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29 protected List<ImportWstColumn> columns;
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31 protected Map<WstColumnValueKey, WstColumnValue> wstCache;
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32
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33 protected Wst peer;
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34
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35 public ImportWst() {
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36 kind = 0;
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37 columns = new ArrayList<ImportWstColumn>();
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38
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39 // This cache is used to avoid db queries for each WstColumnValue later
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40 wstCache = getWstColumnValueCache();
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41 }
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42
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43 public ImportWst(String description) {
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44 this();
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45 this.description = description;
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46 }
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47
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48 public String getDescription() {
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49 return description;
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50 }
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51
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52 public void setDescription(String description) {
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53 this.description = description;
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54 }
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55
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56 public void setNumberColumns(int numColumns) {
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57 for (int i = 0; i < numColumns; ++i) {
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58 columns.add(new ImportWstColumn(this, null, null, i, wstCache));
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59 }
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60 }
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61
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62 public int getNumberColumns() {
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63 return columns.size();
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64 }
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65
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66 public ImportWstColumn getColumn(int index) {
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67 return columns.get(index);
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68 }
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69
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70 public void storeDependencies(River river) {
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71 Wst wst = getPeer(river);
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72
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73 for (ImportWstColumn column: columns) {
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74 column.storeDependencies(river);
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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 public Map<WstColumnValueKey, WstColumnValue> getWstColumnValueCache() {
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80 SessionFactory sessionFactory =
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81 SessionFactoryProvider.createSessionFactory();
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82
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83 Session session = sessionFactory.openSession();
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84
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85 Importer.sessionHolder.set(session);
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86
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87 try {
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88 Query query = session.createQuery("from WstColumnValue");
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89
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90 List<WstColumnValue> values = query.list();
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91 Map<WstColumnValueKey, WstColumnValue> cache =
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92 new HashMap<WstColumnValueKey, WstColumnValue>();
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93
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94 for (WstColumnValue value: values) {
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95 cache.put(
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96 new WstColumnValueKey(value),
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97 value);
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98 }
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99
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100 logger.info("++++++++++++++++++++++++++++++++++++++++++++++++++++");
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101 logger.info(cache.size() + " WstColumnValue objects in WST cache.");
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102 logger.info("++++++++++++++++++++++++++++++++++++++++++++++++++++");
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103
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104 return cache;
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105 }
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106 finally {
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107 session.close();
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108 Importer.sessionHolder.remove();
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109 }
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110 }
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111
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112 public Wst getPeer(River river) {
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113 if (peer == null) {
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114 Session session = Importer.sessionHolder.get();
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115 Query query = session.createQuery(
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116 "from Wst where " +
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117 "river=:river and description=:description and kind=:kind");
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118 query.setParameter("river", river);
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119 query.setParameter("description", description);
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120 query.setParameter("kind", kind);
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121 List<Wst> wsts = query.list();
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122 if (wsts.isEmpty()) {
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123 peer = new Wst(river, description, kind);
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124 session.save(peer);
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125 }
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126 else {
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127 peer = wsts.get(0);
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128 }
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129
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130 }
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131 return peer;
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132 }
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133 }
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134 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org