Mercurial > dive4elements > river
annotate artifacts/src/main/java/org/dive4elements/river/artifacts/model/GaugeFinderFactory.java @ 7261:a56fe3bc6700
Refactoring: Let RiverAccess.getRiver return an River.
Renamed getRiver in getRiverName. Update Callers.
author | Felix Wolfsteller <felix.wolfsteller@intevation.de> |
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date | Tue, 08 Oct 2013 14:50:58 +0200 |
parents | af13ceeba52a |
children | 0a5239a1e46e |
rev | line source |
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1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde |
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2 * Software engineering by Intevation GmbH |
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3 * |
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4 * This file is Free Software under the GNU AGPL (>=v3) |
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5 * and comes with ABSOLUTELY NO WARRANTY! Check out the |
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6 * documentation coming with Dive4Elements River for details. |
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7 */ |
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8 |
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9 package org.dive4elements.river.artifacts.model; |
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10 |
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11 import org.dive4elements.river.artifacts.cache.CacheFactory; |
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12 |
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13 import org.dive4elements.river.backend.SessionHolder; |
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14 |
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15 import org.dive4elements.river.model.River; |
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16 |
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17 import java.util.ArrayList; |
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18 import java.util.List; |
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19 |
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20 import net.sf.ehcache.Cache; |
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21 import net.sf.ehcache.Element; |
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22 |
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23 import org.apache.log4j.Logger; |
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24 |
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25 import org.hibernate.SQLQuery; |
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26 import org.hibernate.Session; |
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27 |
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28 import org.hibernate.type.StandardBasicTypes; |
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29 |
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30 /** Get GaugeFinders. */ |
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31 public class GaugeFinderFactory |
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32 { |
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33 private static Logger log = Logger.getLogger(GaugeFinderFactory.class); |
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34 |
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35 public static final String CACHE_NAME = "gauge-finders"; |
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36 |
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37 public static final String SQL_GAUGES = |
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38 "SELECT" + |
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39 " g.id AS gauge_id," + |
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40 " g.name AS name," + |
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41 " r.a AS a," + |
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42 " r.b AS b " + |
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43 "FROM gauges g" + |
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44 " JOIN ranges r ON g.range_id = r.id " + |
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45 "WHERE" + |
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46 " g.river_id = :river_id " + |
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47 "ORDER BY r.a"; |
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48 |
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49 private static GaugeFinderFactory INSTANCE; |
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50 |
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51 protected GaugeFinderFactory() { |
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52 } |
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53 |
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54 public static synchronized GaugeFinderFactory getInstance() { |
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55 if (INSTANCE == null) { |
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56 INSTANCE = new GaugeFinderFactory(); |
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57 } |
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58 |
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59 return INSTANCE; |
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60 } |
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61 |
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62 public GaugeFinder getGaugeFinder(String riverName) { |
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63 River river = RiverFactory.getRiver(riverName); |
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64 return river != null |
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65 ? getGaugeFinder(river.getId(), river.getKmUp()) |
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66 : null; |
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67 } |
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68 |
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69 public synchronized GaugeFinder getGaugeFinder( |
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70 int riverId, |
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71 boolean isKmUp |
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72 ) { |
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73 Cache cache = CacheFactory.getCache(CACHE_NAME); |
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74 |
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75 if (cache == null) { |
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76 return getUncached(riverId, isKmUp); |
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77 } |
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78 |
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79 String cacheKey = riverId + "-" + isKmUp; |
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80 Element element = cache.get(cacheKey); |
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81 |
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82 if (element != null) { |
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83 return (GaugeFinder)element.getValue(); |
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84 } |
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85 |
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86 GaugeFinder finder = getUncached(riverId, isKmUp); |
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87 |
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88 if (finder != null) { |
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89 cache.put(new Element(cacheKey, finder)); |
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90 } |
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91 |
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92 return finder; |
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93 } |
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94 |
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95 protected GaugeFinder loadGauges( |
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96 Session session, |
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97 int riverId, |
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98 boolean isKmUp |
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99 ) { |
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100 SQLQuery query = session.createSQLQuery(SQL_GAUGES) |
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101 .addScalar("gauge_id", StandardBasicTypes.INTEGER) |
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102 .addScalar("name", StandardBasicTypes.STRING) |
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103 .addScalar("a", StandardBasicTypes.DOUBLE) |
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104 .addScalar("b", StandardBasicTypes.DOUBLE); |
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105 |
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106 query.setInteger("river_id", riverId); |
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107 |
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108 List<Object []> list = query.list(); |
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109 |
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110 if (list.isEmpty()) { |
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111 log.warn("River " + riverId + " has no gauges."); |
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112 return null; |
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113 } |
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114 |
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115 List<GaugeRange> gauges = new ArrayList<GaugeRange>(); |
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116 |
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117 for (Object [] row: list) { |
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118 int gaugeId = (Integer)row[0]; |
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119 String name = (String) row[1]; |
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120 double start = (Double) row[2]; |
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121 double end = (Double) row[3]; |
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122 GaugeRange gauge = new GaugeRange(start, end, name, gaugeId); |
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123 gauges.add(gauge); |
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124 } |
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125 |
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126 return new GaugeFinder(gauges, isKmUp); |
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127 } |
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128 |
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129 protected GaugeFinder getUncached(int riverId, boolean isKmUp) { |
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130 Session session = SessionHolder.HOLDER.get(); |
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131 |
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132 GaugeFinder finder = loadGauges(session, riverId, isKmUp); |
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133 |
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134 if (finder == null |
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135 || !finder.loadDischargeSectors(session, riverId)) { |
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136 return null; |
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137 } |
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138 |
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139 return finder; |
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140 } |
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141 } |
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142 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |