Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/FixingsColumnFactory.java @ 2673:0143b44631cc

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Beginnings of mittlere hoehe calculation. flys-artifacts/trunk@4367 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Felix Wolfsteller <felix.wolfsteller@intevation.de>
date Wed, 09 May 2012 19:03:54 +0000
parents 8bc1e1cb7f7b
children a441be7f1589
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1 package de.intevation.flys.artifacts.model;
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2
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3 import de.intevation.flys.artifacts.model.FixingsOverview.Fixing;
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4
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5 import de.intevation.flys.artifacts.cache.CacheFactory;
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6
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7 import de.intevation.flys.backend.SessionHolder;
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8
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9 import java.util.List;
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10
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11 import net.sf.ehcache.Cache;
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12 import net.sf.ehcache.Element;
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13
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14 import org.hibernate.Session;
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15 import org.hibernate.SQLQuery;
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16
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17 import org.hibernate.type.StandardBasicTypes;
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18
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19 import org.apache.log4j.Logger;
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20
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21 public class FixingsColumnFactory
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22 {
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23 private static Logger log = Logger.getLogger(FixingsColumnFactory.class);
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24
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25 public static final String CACHE_NAME = "fixings-columns";
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26
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27 public static final String SQL_COLUMN_WS =
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28 "SELECT wcv.position AS km, wcv.w AS w " +
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29 "FROM wst_column_values wcv " +
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30 "WHERE wst_column_id = :column_id " +
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31 "ORDER by wcv.position";
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32
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33 public static final String SQL_COLUMN_QS =
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34 "SELECT wqr.q AS q, r.a AS a, r.b AS b " +
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35 "FROM wst_column_q_ranges wcqr " +
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36 "JOIN wst_q_ranges wqr ON wcqr.wst_q_range_id = wqr.id " +
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37 "JOIN ranges r ON wqr.range_id = r.id " +
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38 "WHERE wcqr.wst_column_id = :column_id ORDER by r.a";
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39
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40 public static final FixingsColumnFactory INSTANCE =
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41 new FixingsColumnFactory();
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42
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43 private FixingsColumnFactory() {
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44 }
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45
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46 public FixingsColumn getColumnData(Fixing.Column column) {
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47
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48 boolean debug = log.isDebugEnabled();
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49
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50 if (debug) {
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51 log.debug("FixingsColumnFactory.getColumnData");
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52 }
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53
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54 Cache cache = CacheFactory.getCache(CACHE_NAME);
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55
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56 if (cache == null) {
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57 if (debug) {
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58 log.debug("Cache unconfigured.");
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59 }
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60 return getUncached(column);
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61 }
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62
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63 Integer cacheKey = Integer.valueOf(column.getId());
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64 Element element = cache.get(cacheKey);
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65
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66 if (element != null) {
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67 if (debug) {
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68 log.debug("Column " + cacheKey + " found in cache.");
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69 }
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70 return (FixingsColumn)element.getValue();
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71 }
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72 else {
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73 FixingsColumn result = getUncached(column);
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74 if (result != null) {
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75 if (debug) {
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76 log.debug("Store column " + cacheKey + " into cache.");
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77 }
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78 cache.put(new Element(cacheKey, result));
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79 }
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80 return result;
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81 }
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82 }
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83
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84 protected FixingsColumn getUncached(Fixing.Column column) {
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85 Session session = SessionHolder.HOLDER.get();
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86
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87 SQLQuery sqlQuery = session.createSQLQuery(SQL_COLUMN_WS)
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88 .addScalar("km", StandardBasicTypes.DOUBLE)
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89 .addScalar("w", StandardBasicTypes.DOUBLE);
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90
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91 sqlQuery.setInteger("column_id", column.getId());
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92
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93 List<Object []> results = sqlQuery.list();
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94
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95 if (results.isEmpty()) {
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96 return null;
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97 }
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98
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99 double [] kms = new double[results.size()];
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100 double [] ws = new double[kms.length];
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101
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102 for (int i = 0; i < kms.length; ++i) {
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103 Object [] row = results.get(i);
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104 kms[i] = ((Double)row[0]).doubleValue();
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105 ws [i] = ((Double)row[1]).doubleValue();
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106 }
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107
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108 sqlQuery = session.createSQLQuery(SQL_COLUMN_QS)
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109 .addScalar("q", StandardBasicTypes.DOUBLE)
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110 .addScalar("a", StandardBasicTypes.DOUBLE)
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111 .addScalar("b", StandardBasicTypes.DOUBLE);
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112
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113 sqlQuery.setInteger("column_id", column.getId());
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114
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115 results = sqlQuery.list();
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116
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117 if (results.isEmpty()) {
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118 return null;
cc0fa1798a3c FixingsKMChartService: Generate chart and deliver the image as the response of the service.
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parents: 2619
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119 }
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120
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6ed24efc80de Loaded columns of fixings from database and store them into the cache.
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121 QRangeTree qs = new QRangeTree(
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122 results, QRangeTree.WITHOUT_COLUMN, 0, results.size());
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parents: 2615
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123
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124 return new FixingsColumn(kms, ws, qs);
2615
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parents:
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125 }
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126 }
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127 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org