Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/artifacts/WMSHWSLinesArtifact.java @ 7471:fff862f4ef76

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Experimental caching of datacage recommendations. The respective hook is called a lot and running the datacage over and over again when loading data can be expensive. So the generated recommendations are cached for some time. Hopefully this improves the overall speed of loading data from the datacage.
author Sascha L. Teichmann <teichmann@intevation.de>
date Wed, 30 Oct 2013 15:26:21 +0100
parents af13ceeba52a
children 8d5ca5175038
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;
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10
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11 import java.util.List;
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12
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13 import org.w3c.dom.Document;
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14
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15 import org.apache.log4j.Logger;
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16
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17 import com.vividsolutions.jts.geom.Envelope;
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18
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19 import org.dive4elements.artifacts.ArtifactFactory;
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20 import org.dive4elements.artifacts.CallMeta;
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21
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22 import org.dive4elements.artifactdatabase.state.DefaultOutput;
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23 import org.dive4elements.artifactdatabase.state.Facet;
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24 import org.dive4elements.artifactdatabase.state.State;
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25
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26 import org.dive4elements.river.model.HWSLine;
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27 import org.dive4elements.river.model.River;
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28
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29 import org.dive4elements.river.artifacts.model.FacetTypes;
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30 import org.dive4elements.river.artifacts.model.RiverFactory;
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31 import org.dive4elements.river.utils.RiverUtils;
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32 import org.dive4elements.river.utils.GeometryUtils;
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33
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34
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35 public class WMSHWSLinesArtifact extends WMSDBArtifact {
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36
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37 public static final String NAME = "hws_lines";
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38
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39
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40 private static final Logger logger =
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41 Logger.getLogger(WMSHWSLinesArtifact.class);
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42
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43
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44 @Override
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45 public void setup(
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46 String identifier,
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47 ArtifactFactory factory,
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48 Object context,
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49 CallMeta callMeta,
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50 Document data)
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51 {
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52 logger.debug("WMSHWSLinesArtifact.setup");
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53
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54 super.setup(identifier, factory, context, callMeta, data);
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55 }
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56
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57
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58 @Override
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59 public String getName() {
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60 return NAME;
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61 }
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62
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63
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64 @Override
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65 public State getCurrentState(Object cc) {
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66 State s = new HWSLinesState(this);
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67
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68 List<Facet> fs = getFacets(getCurrentStateId());
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69
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70 DefaultOutput o = new DefaultOutput(
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71 "floodmap",
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72 "floodmap",
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73 "image/png",
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74 fs,
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75 "map");
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76
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77 s.getOutputs().add(o);
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78
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79 return s;
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80 }
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81
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82
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83 public static class HWSLinesState extends WMSDBState implements FacetTypes
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84 {
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85 private static final Logger logger =
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86 Logger.getLogger(HWSLinesState.class);
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87
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88 protected int riverId;
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89
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90 public HWSLinesState(WMSDBArtifact artifact) {
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91 super(artifact);
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92 riverId = 0;
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93 }
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94
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95 public int getRiverId() {
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96 if (riverId == 0) {
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97 String ids = artifact.getDataAsString("ids");
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98 String[] parts = ids.split(";");
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99
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100 try {
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101 riverId = Integer.parseInt(parts[0]);
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102 }
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103 catch (NumberFormatException nfe) {
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104 logger.error("Cannot parse river id from '" + parts[0] + "'");
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105 }
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106 }
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107
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108 return riverId;
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109 }
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110
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111 @Override
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112 protected String getFacetType() {
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113 return FLOODMAP_HWS_LINES;
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114 }
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115
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116 @Override
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117 protected String getUrl() {
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118 return RiverUtils.getUserWMSUrl(artifact.identifier());
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119 }
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120
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121 @Override
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122 protected String getSrid() {
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123 River river = RiverFactory.getRiver(getRiverId());
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124 return RiverUtils.getRiverSrid(river.getName());
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125 }
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126
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127 @Override
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128 protected Envelope getExtent(boolean reproject) {
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129 List<HWSLine> hws = HWSLine.getLines(getRiverId(), getName());
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130
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131 Envelope max = null;
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132
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133 for (HWSLine h: hws) {
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134 Envelope env = h.getGeom().getEnvelopeInternal();
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135
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136 if (max == null) {
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137 max = env;
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138 continue;
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139 }
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140
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141 max.expandToInclude(env);
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142 }
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143
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144 return max != null && reproject
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145 ? GeometryUtils.transform(max, getSrid())
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146 : max;
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147 }
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148
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149 @Override
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150 protected String getFilter() {
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151 return "river_id=" + String.valueOf(getRiverId())
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152 + " AND name='" + getName() + "'";
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153 }
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154
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155 @Override
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156 protected String getDataString() {
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157 String srid = getSrid();
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158
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Sascha L. Teichmann <teichmann@intevation.de>
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159 if (RiverUtils.isUsingOracle()) {
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160 return "geom FROM hws_lines USING SRID " + srid;
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161 }
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162 else {
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163 return "geom FROM hws_lines USING UNIQUE id USING SRID " + srid;
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164 }
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165 }
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166
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167 @Override
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168 protected String getGeometryType() {
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169 return "LINE";
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170 }
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171 }
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172 }
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173 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org