Mercurial > dive4elements > river
annotate artifacts/src/main/java/org/dive4elements/river/artifacts/datacage/Recommendations.java @ 5994:af13ceeba52a
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author | Sascha L. Teichmann <teichmann@intevation.de> |
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date | Sun, 12 May 2013 18:13:50 +0200 |
parents | 59ff03ff48f1 |
children | d0f01bc92fd0 |
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.datacage; |
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10 |
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11 import java.util.Map; |
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12 import java.util.HashMap; |
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13 import java.util.List; |
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14 import java.util.ArrayList; |
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15 |
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16 import java.io.InputStream; |
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17 import java.io.IOException; |
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18 import java.io.File; |
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19 |
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20 import java.io.FileInputStream; |
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21 |
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22 import java.sql.Connection; |
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23 import java.sql.SQLException; |
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24 |
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25 import org.apache.log4j.Logger; |
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26 |
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27 import org.w3c.dom.Document; |
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28 import org.w3c.dom.Node; |
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29 |
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30 import org.hibernate.Session; |
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31 import org.hibernate.SessionFactory; |
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32 |
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33 import org.hibernate.jdbc.Work; |
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34 |
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35 import org.dive4elements.artifacts.common.utils.Config; |
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36 import org.dive4elements.artifacts.common.utils.XMLUtils; |
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37 import org.dive4elements.artifacts.common.utils.StringUtils; |
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38 |
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39 import org.dive4elements.river.artifacts.D4EArtifact; |
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40 |
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41 import org.dive4elements.river.backend.SessionFactoryProvider; |
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42 import org.dive4elements.river.backend.SessionHolder; |
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43 |
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44 import org.dive4elements.artifactdatabase.data.StateData; |
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45 |
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46 import org.dive4elements.river.artifacts.datacage.templating.Builder; |
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47 import org.dive4elements.river.artifacts.datacage.templating.BuilderPool; |
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48 |
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49 |
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50 /** |
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51 * Also accessible as Singleton with getInstance(). |
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52 */ |
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53 public class Recommendations |
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54 { |
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55 public static final String CONNECTION_USER = "user"; |
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56 public static final String CONNECTION_SYSTEM = "system"; |
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57 public static final String CONNECTION_SEDDB = "seddb"; |
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58 |
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59 public static final String DEFAULT_CONNECTION_NAME = CONNECTION_SYSTEM; |
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60 |
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61 private static Logger log = Logger.getLogger(Recommendations.class); |
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62 |
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63 private static final boolean DEVELOPMENT_MODE = |
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64 Boolean.getBoolean("flys.datacage.recommendations.development"); |
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65 |
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66 public static final String XPATH_TEMPLATE = |
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67 "/artifact-database/metadata/template/text()"; |
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68 |
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69 public static final String DEFAULT_TEMPLATE_PATH = |
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70 "${artifacts.config.dir}/meta-data.xml"; |
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71 |
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72 private static Recommendations INSTANCE; |
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73 |
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74 public static class BuilderPoolProvider |
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75 { |
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76 protected BuilderPool builderPool; |
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77 |
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78 public BuilderPoolProvider() { |
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79 } |
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80 |
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81 public BuilderPoolProvider(BuilderPool builderPool) { |
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82 this.builderPool = builderPool; |
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83 } |
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84 |
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85 public BuilderPool getBuilderPool() { |
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86 return builderPool; |
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87 } |
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88 } // class BuilderProvider |
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89 |
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90 public static class FileBuilderPoolProvider |
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91 extends BuilderPoolProvider |
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92 { |
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93 protected File file; |
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94 protected long lastModified; |
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95 |
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96 public FileBuilderPoolProvider() { |
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97 } |
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98 |
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99 public FileBuilderPoolProvider(File file) { |
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100 this.file = file; |
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101 lastModified = Long.MIN_VALUE; |
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102 } |
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103 |
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104 @Override |
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105 public synchronized BuilderPool getBuilderPool() { |
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106 long modified = file.lastModified(); |
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107 if (modified > lastModified) { |
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108 lastModified = modified; |
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109 try { |
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110 Document template = loadTemplate(file); |
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111 builderPool = new BuilderPool(template); |
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112 } |
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113 catch (IOException ioe) { |
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114 log.error(ioe); |
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115 } |
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116 } |
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117 return builderPool; |
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118 } |
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119 |
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120 public BuilderPoolProvider toStaticProvider() { |
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121 return new BuilderPoolProvider(builderPool); |
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122 } |
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123 } // class BuilderProvider |
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124 |
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125 protected BuilderPoolProvider builderPoolProvider; |
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126 |
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127 public Recommendations() { |
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128 } |
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129 |
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130 public Recommendations(BuilderPoolProvider builderPoolProvider) { |
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131 this.builderPoolProvider = builderPoolProvider; |
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132 } |
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133 |
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134 public BuilderPool getBuilderPool() { |
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135 return builderPoolProvider.getBuilderPool(); |
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136 } |
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137 |
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138 protected static void artifactToParameters( |
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139 D4EArtifact artifact, |
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140 Map<String, Object> parameters |
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141 ) { |
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142 parameters.put("CURRENT-STATE-ID", artifact.getCurrentStateId()); |
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143 parameters.put("ARTIFACT-ID", artifact.identifier()); |
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144 |
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145 for (StateData sd: artifact.getAllData()) { |
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146 Object value = sd.getValue(); |
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147 if (value == null) { |
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148 continue; |
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149 } |
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150 String key = sd.getName().replace('.', '-').toUpperCase(); |
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151 parameters.put(key, value); |
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152 } |
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153 } |
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154 |
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155 /** |
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156 * Put Key/Values from \param src to \param dst, but uppercase |
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157 * both Keys and Values. |
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158 */ |
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159 public static void convertKeysToUpperCase( |
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160 Map<String, Object> src, |
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161 Map<String, Object> dst |
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162 ) { |
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163 for (Map.Entry<String, Object> entry: src.entrySet()) { |
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164 dst.put(entry.getKey().toUpperCase(), entry.getValue()); |
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165 } |
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166 } |
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167 |
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168 |
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169 /** |
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170 * Append recommendations to \param result. |
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171 * @param extraParameters parameters (typicall example: 'recommended') |
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172 */ |
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173 public void recommend( |
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174 D4EArtifact artifact, |
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175 String userId, |
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176 String [] outs, |
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177 Map<String, Object> extraParameters, |
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178 Node result |
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179 ) { |
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180 Map<String, Object> parameters = new HashMap<String, Object>(); |
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181 |
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182 if (extraParameters != null) { |
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183 convertKeysToUpperCase(extraParameters, parameters); |
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184 } |
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185 |
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186 if (userId != null) { |
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187 parameters.put("USER-ID", userId); |
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188 } |
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189 |
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190 if (artifact != null) { |
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191 artifactToParameters(artifact, parameters); |
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192 } |
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193 |
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194 parameters.put("ARTIFACT-OUTS", StringUtils.toUpperCase(outs)); |
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195 |
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196 parameters.put("PARAMETERS", parameters); |
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197 |
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198 recommend(parameters, userId, result); |
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199 } |
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200 |
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201 |
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202 /** |
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203 * Append recommendations to \param result. |
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204 */ |
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205 public void recommend( |
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206 Map<String, Object> parameters, |
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207 String userId, |
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208 Node result |
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209 ) { |
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210 recommend(parameters, userId, result, SessionHolder.HOLDER.get()); |
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211 } |
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212 |
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213 public void recommend( |
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214 final Map<String, Object> parameters, |
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215 final String userId, |
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216 final Node result, |
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217 Session systemSession |
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218 ) { |
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219 systemSession.doWork(new Work() { |
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220 @Override |
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221 public void execute(final Connection systemConnection) |
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222 throws SQLException |
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223 { |
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224 SessionFactory sedDBFactory = |
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225 SessionFactoryProvider.getSedDBSessionFactory(); |
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226 |
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227 Session sedDBSession = sedDBFactory.openSession(); |
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228 try { |
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229 sedDBSession.doWork(new Work() { |
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230 @Override |
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231 public void execute(Connection sedDBConnection) |
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232 throws SQLException |
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233 { |
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234 recommend( |
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235 parameters, userId, result, |
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236 systemConnection, |
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237 sedDBConnection); |
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238 } |
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239 }); |
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240 } |
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241 finally { |
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242 sedDBSession.close(); |
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243 } |
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244 } |
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245 }); |
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246 } |
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247 |
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248 public void recommend( |
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249 Map<String, Object> parameters, |
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250 String userId, |
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251 Node result, |
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252 Connection systemConnection, |
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253 Connection seddbConnection |
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254 ) throws SQLException |
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255 { |
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256 List<Builder.NamedConnection> connections = |
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257 new ArrayList<Builder.NamedConnection>(3); |
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258 |
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259 Connection userConnection = userId != null |
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260 ? DBConfig |
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261 .getInstance() |
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262 .getDBConnection() |
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263 .getDataSource() |
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264 .getConnection() |
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265 : null; |
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266 |
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267 try { |
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268 connections.add(new Builder.NamedConnection( |
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269 CONNECTION_SYSTEM, systemConnection, true)); |
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270 |
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271 if (seddbConnection != null) { |
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272 connections.add(new Builder.NamedConnection( |
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273 CONNECTION_SEDDB, seddbConnection, true)); |
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274 } |
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275 |
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276 if (userConnection != null) { |
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277 connections.add(new Builder.NamedConnection( |
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278 CONNECTION_USER, userConnection, false)); |
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279 } |
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280 |
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281 getBuilderPool().build(connections, result, parameters); |
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282 } |
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283 finally { |
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284 if (userConnection != null) { |
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285 userConnection.close(); |
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286 } |
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287 } |
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288 } |
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289 |
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290 /** Get singleton instance. */ |
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291 public static synchronized Recommendations getInstance() { |
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292 if (INSTANCE == null) { |
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293 INSTANCE = createRecommendations(); |
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294 } |
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295 return INSTANCE; |
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296 } |
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297 |
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298 |
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299 protected static Document loadTemplate(File file) throws IOException { |
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300 InputStream in = new FileInputStream(file); |
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301 |
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302 try { |
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303 Document template = XMLUtils.parseDocument(in); |
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304 if (template == null) { |
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305 throw new IOException("cannot load template"); |
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306 } |
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307 return template; |
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308 } |
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309 finally { |
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310 in.close(); |
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311 } |
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312 } |
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313 |
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314 public static Recommendations createRecommendations(File file) { |
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315 log.debug("Recommendations.createBuilder"); |
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316 |
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317 if (!file.isFile() || !file.canRead()) { |
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318 log.error("Cannot open template file '" + file + "'"); |
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319 return null; |
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320 } |
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321 |
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322 FileBuilderPoolProvider fbp = new FileBuilderPoolProvider(file); |
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323 |
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324 if (fbp.getBuilderPool() == null) { |
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325 log.error("failed loading builder"); |
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326 return null; |
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327 } |
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328 |
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329 BuilderPoolProvider bp = DEVELOPMENT_MODE |
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330 ? fbp |
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331 : fbp.toStaticProvider(); |
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332 |
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333 return new Recommendations(bp); |
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334 } |
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335 |
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336 protected static Recommendations createRecommendations() { |
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337 log.debug("Recommendations.createRecommendations"); |
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338 |
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339 String path = Config.getStringXPath(XPATH_TEMPLATE); |
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340 |
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341 if (path == null) { |
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342 path = DEFAULT_TEMPLATE_PATH; |
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343 } |
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344 |
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345 path = Config.replaceConfigDir(path); |
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346 |
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347 log.info("Meta data template: " + path); |
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348 |
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349 return createRecommendations(new File(path)); |
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350 } |
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351 } |
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352 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 : |