Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/GaugeFinderFactory.java @ 4187:21f4e4b79121

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Refactor GaugeDischargeCurveFacet to be able to set a facet name For adding another output of the GaugeDischargeCurveArtifact it is necessary to provide to facet instances with different names. Therefore the GaugeDischargeCurveFacet is extended to set the facet name in the constructor.
author Björn Ricks <bjoern.ricks@intevation.de>
date Fri, 19 Oct 2012 13:25:49 +0200
parents c44ff50f4970
children 61f4d4164a30
rev   line source
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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.cache.CacheFactory;
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4
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5 import de.intevation.flys.backend.SessionHolder;
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6
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7 import de.intevation.flys.model.River;
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8
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9 import java.util.ArrayList;
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10 import java.util.List;
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12 import net.sf.ehcache.Cache;
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13 import net.sf.ehcache.Element;
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14
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15 import org.apache.log4j.Logger;
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17 import org.hibernate.SQLQuery;
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18 import org.hibernate.Session;
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20 import org.hibernate.type.StandardBasicTypes;
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22 public class GaugeFinderFactory
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23 {
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24 private static Logger log = Logger.getLogger(GaugeFinderFactory.class);
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26 public static final String CACHE_NAME = "gauge-finders";
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27
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28 public static final String SQL_GAUGES =
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29 "SELECT" +
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30 " g.id AS gauge_id," +
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31 " g.name AS name," +
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32 " r.a AS a," +
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33 " r.b AS b " +
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34 "FROM gauges g" +
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35 " JOIN ranges r ON g.range_id = r.id " +
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36 "WHERE" +
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37 " g.river_id = :river_id " +
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38 "ORDER BY r.a";
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40 private static GaugeFinderFactory INSTANCE;
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41
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42 protected GaugeFinderFactory() {
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43 }
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44
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45 public static synchronized GaugeFinderFactory getInstance() {
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46 if (INSTANCE == null) {
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47 INSTANCE = new GaugeFinderFactory();
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48 }
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49
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50 return INSTANCE;
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51 }
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52
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53 public GaugeFinder getGaugeFinder(String riverName) {
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54 River river = RiverFactory.getRiver(riverName);
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55 return river != null
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56 ? getGaugeFinder(river.getId(), river.getKmUp())
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57 : null;
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58 }
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59
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60 public synchronized GaugeFinder getGaugeFinder(
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61 int riverId,
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62 boolean isKmUp
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63 ) {
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64 Cache cache = CacheFactory.getCache(CACHE_NAME);
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65
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66 if (cache == null) {
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67 return getUncached(riverId, isKmUp);
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68 }
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69
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70 String cacheKey = riverId + "-" + isKmUp;
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71 Element element = cache.get(cacheKey);
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72
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73 if (element != null) {
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74 return (GaugeFinder)element.getValue();
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75 }
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76
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77 GaugeFinder finder = getUncached(riverId, isKmUp);
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78
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79 if (finder != null) {
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80 cache.put(new Element(cacheKey, finder));
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81 }
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82
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83 return finder;
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84 }
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85
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86 protected GaugeFinder loadGauges(
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87 Session session,
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88 int riverId,
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89 boolean isKmUp
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90 ) {
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91 SQLQuery query = session.createSQLQuery(SQL_GAUGES)
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92 .addScalar("gauge_id", StandardBasicTypes.INTEGER)
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93 .addScalar("name", StandardBasicTypes.STRING)
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94 .addScalar("a", StandardBasicTypes.DOUBLE)
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95 .addScalar("b", StandardBasicTypes.DOUBLE);
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96
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97 query.setInteger("river_id", riverId);
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98
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99 List<Object []> list = query.list();
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100
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101 if (list.isEmpty()) {
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102 log.warn("River " + riverId + " has no gauges.");
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103 return null;
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104 }
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105
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106 List<GaugeRange> gauges = new ArrayList<GaugeRange>();
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107
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108 for (Object [] row: list) {
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109 int gaugeId = (Integer)row[0];
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110 String name = (String) row[1];
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111 double start = (Double) row[2];
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112 double end = (Double) row[3];
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113 GaugeRange gauge = new GaugeRange(start, end, name, gaugeId);
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114 gauges.add(gauge);
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115 }
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116
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117 return new GaugeFinder(gauges, isKmUp);
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118 }
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119
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120 protected GaugeFinder getUncached(int riverId, boolean isKmUp) {
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121 Session session = SessionHolder.HOLDER.get();
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122
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123 GaugeFinder finder = loadGauges(session, riverId, isKmUp);
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124
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125 if (finder == null
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126 || !finder.loadDischargeSectors(session, riverId)) {
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127 return null;
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128 }
3152
368d1837ce5d Removed trailing whitespace.
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129
3143
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130 return finder;
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131 }
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132 }
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133 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org