Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/artifacts/model/minfo/SedimentLoadDataFactory.java @ 8033:5e3f4b4fcb28

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New way to loaded sediment loads from database and cache it. The data structure a way more straight forward. TODO: Implement calculation on this basis.
author Sascha L. Teichmann <teichmann@intevation.de>
date Tue, 15 Jul 2014 12:47:52 +0200
parents
children b6e7cfcabf2c
rev   line source
8033
5e3f4b4fcb28 New way to loaded sediment loads from database and cache it. The data structure a way more straight forward. TODO: Implement calculation on this basis.
Sascha L. Teichmann <teichmann@intevation.de>
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1 /* Copyright (C) 2014 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 package org.dive4elements.river.artifacts.model.minfo;
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9
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10 import java.sql.Timestamp;
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11 import java.util.HashMap;
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12 import java.util.Iterator;
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13
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14 import net.sf.ehcache.Cache;
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15 import net.sf.ehcache.Element;
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16
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17 import org.apache.log4j.Logger;
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18 import org.dive4elements.river.artifacts.cache.CacheFactory;
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19 import org.dive4elements.river.backend.SessionHolder;
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20 import org.hibernate.SQLQuery;
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21 import org.hibernate.Session;
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22 import org.hibernate.type.StandardBasicTypes;
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23
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24 public class SedimentLoadDataFactory
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25 {
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26 private static Logger log = Logger.getLogger(SedimentLoadDataFactory.class);
5e3f4b4fcb28 New way to loaded sediment loads from database and cache it. The data structure a way more straight forward. TODO: Implement calculation on this basis.
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27
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28 public static final String CACHE_NAME = "sediment-load-data";
5e3f4b4fcb28 New way to loaded sediment loads from database and cache it. The data structure a way more straight forward. TODO: Implement calculation on this basis.
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29
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30 public static final String SUSPENDED_STRING = "Schwebstoff";
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31
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32 public static final String SQL_LOAD_RIVER_SEDIMENT_LOADS =
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33 "SELECT " +
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34 "sl.id AS sl_id, " +
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35 "sl.description AS sl_description, " +
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36 "ti.start_time AS ti_start_time, " +
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37 "ti.stop_time AS ti_stoptime, " +
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38 "slv.value AS slv_value, " +
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39 "gf.name AS gf_name, " +
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40 "ms.id AS ms_id, " +
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41 "ms.station AS ms_station, " +
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42 "ms.measurement_type AS ms_type " +
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43 "FROM sediment_load_values slv " +
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44 "JOIN sediment_load sl ON slv.sediment_load_id = sl.id " +
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45 "JOIN time_intervals ti ON sl.time_interval_id = ti.id " +
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46 "JOIN grain_fraction gf ON sl.grain_fraction_id = gf.id " +
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47 "JOIN measurement_station ms ON slv.measurement_station_id = ms.id " +
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48 "JOIN rivers r ON ms.river_id = r.id " +
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49 "WHERE r.name = :river " +
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50 "ORDER BY sl.id";
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51
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52 private SedimentLoadDataFactory() {
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53 }
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54
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55 public SedimentLoadData getSedimentLoadData(String river) {
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56 boolean debug = log.isDebugEnabled();
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57
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58 if (debug) {
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59 log.debug(
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60 "Looking for sediment load data for river '" + river + "'");
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61 }
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62
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63 Cache cache = CacheFactory.getCache(CACHE_NAME);
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64
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65 if (cache == null) {
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66 if (debug) {
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67 log.debug("Cache not configured.");
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68 }
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69 return getUncached(river);
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70 }
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71
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72 String key = "sediment-load-" + river;
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73
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74 Element element = cache.get(key);
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75
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76 if (element != null) {
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77 if (debug) {
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78 log.debug("Sediment load data found in cache");
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79 }
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80 return (SedimentLoadData)element.getValue();
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81 }
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82
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83 SedimentLoadData sedimentLoad = getUncached(river);
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84
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85 if (sedimentLoad != null) {
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86 if (debug) {
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87 log.debug("Store sediment load data in cache.");
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88 }
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89 cache.put(new Element(key, sedimentLoad));
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90 }
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91
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92 return sedimentLoad;
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93 }
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94
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95 public SedimentLoadData getUncached(String river) {
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96
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97 Session session = SessionHolder.HOLDER.get();
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98
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99 SQLQuery sqlQuery = session.createSQLQuery(SQL_LOAD_RIVER_SEDIMENT_LOADS)
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100 .addScalar("sl_id", StandardBasicTypes.INTEGER)
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101 .addScalar("sl_description", StandardBasicTypes.STRING)
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102 .addScalar("ti_start_time", StandardBasicTypes.TIMESTAMP)
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103 .addScalar("ti_stop_time", StandardBasicTypes.TIMESTAMP)
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104 .addScalar("slv_value", StandardBasicTypes.DOUBLE)
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105 .addScalar("gf_name", StandardBasicTypes.STRING)
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106 .addScalar("ms_id", StandardBasicTypes.INTEGER)
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107 .addScalar("ms_station", StandardBasicTypes.DOUBLE)
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108 .addScalar("ms_type", StandardBasicTypes.STRING);
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109
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110 sqlQuery.setString("river", river);
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111
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112 SedimentLoadData.Load load = null;
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113 int grainFractionIndex = -1;
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114
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115 HashMap<Integer, SedimentLoadData.Station> id2station
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116 = new HashMap<Integer, SedimentLoadData.Station>();
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117
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118 for (Iterator iter = sqlQuery.iterate(); iter.hasNext();) {
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119 Object [] row = (Object [])iter.next();
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120
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121 Integer sl_id = (Integer)row[0];
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122 String sl_description = (String)row[1];
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123 Timestamp ti_start_time = (Timestamp)row[2];
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124 Timestamp ti_stop_time = (Timestamp)row[3];
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125 Double slv_value = (Double)row[4];
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126 String gf_name = (String)row[5];
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127 Integer ms_id = (Integer)row[6];
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128 Double ms_station = (Double)row[7];
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129 String ms_type = (String)row[8];
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130
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131 if (load == null || load.getId() != sl_id) {
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132 load = new SedimentLoadData.Load(
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133 sl_id, sl_description, ti_start_time, ti_stop_time);
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134
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135 // Grain fractions only change when a new sediment load starts.
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136 grainFractionIndex =
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137 SedimentLoadData.grainFractionIndex(gf_name);
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138
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139 if (grainFractionIndex == -1) {
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140 log.error("Unknown grain fraction type: " + gf_name);
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141 break;
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142 }
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143 }
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144
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145 SedimentLoadData.Station station = id2station.get(ms_id);
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146 if (station == null) {
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147 int type = ms_type.equalsIgnoreCase(SUSPENDED_STRING)
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148 ? SedimentLoadData.Station.SUSPENDED
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149 : SedimentLoadData.Station.BED_LOAD;
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150
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151 station = new SedimentLoadData.Station(type, ms_station);
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152 id2station.put(ms_id, station);
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153 }
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154
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155 station.addValue(
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156 grainFractionIndex,
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157 new SedimentLoadData.Value(load, slv_value));
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158 }
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159
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160 SedimentLoadData sld = new SedimentLoadData();
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161
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162 for (SedimentLoadData.Station station: id2station.values()) {
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163 sld.addStation(station);
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164 }
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165
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166 return sld;
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167 }
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168 }
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169 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org