Mercurial > dive4elements > river
annotate gwt-client/src/main/java/org/dive4elements/river/client/server/FeedServiceImpl.java @ 7172:e1c875583a94
Move MINFO-fixation-stuff to MINFO-datacage and give specified names.
author | Tom Gottfried <tom@intevation.de> |
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date | Thu, 26 Sep 2013 16:17:36 +0200 |
parents | ea9eef426962 |
children | 238fc722f87a |
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.client.server; |
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10 |
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11 import java.util.ArrayList; |
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12 import java.util.List; |
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13 |
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14 import org.w3c.dom.Document; |
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15 |
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16 import org.apache.log4j.Logger; |
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17 |
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18 import com.google.gwt.user.server.rpc.RemoteServiceServlet; |
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19 |
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20 import org.dive4elements.artifacts.common.ArtifactNamespaceContext; |
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21 import org.dive4elements.artifacts.common.utils.ClientProtocolUtils; |
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22 import org.dive4elements.artifacts.common.utils.XMLUtils; |
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23 |
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24 import org.dive4elements.artifacts.httpclient.exceptions.ConnectionException; |
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25 import org.dive4elements.artifacts.httpclient.http.HttpClient; |
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26 import org.dive4elements.artifacts.httpclient.http.HttpClientImpl; |
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27 import org.dive4elements.artifacts.httpclient.http.response.DocumentResponseHandler; |
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28 |
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29 import org.dive4elements.river.client.shared.exceptions.ServerException; |
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30 import org.dive4elements.river.client.shared.model.Artifact; |
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31 import org.dive4elements.river.client.shared.model.Data; |
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32 import org.dive4elements.river.client.shared.model.DataItem; |
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33 import org.dive4elements.river.client.client.services.FeedService; |
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34 |
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35 /** |
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36 * This interface provides a method that bundles the artifact specific |
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37 * operation FEED. |
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38 */ |
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39 public class FeedServiceImpl |
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40 extends RemoteServiceServlet |
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41 implements FeedService |
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42 { |
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43 private static final Logger logger = Logger.getLogger(FeedServiceImpl.class); |
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44 |
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45 |
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46 /** XPath that points to the result type of a feed or advance operation.*/ |
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47 public static final String XPATH_RESULT = "/art:result/@art:type"; |
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48 |
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49 /** XPath that points to the result type of a feed or advance operation.*/ |
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50 public static final String XPATH_RESULT_MSG = "/art:result/text()"; |
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51 |
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52 /** A constant that marks errors.*/ |
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53 public static final String OPERATION_FAILURE = "FAILURE"; |
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54 |
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55 /** The error message key that is thrown if an error occured while feeding |
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56 * new data.*/ |
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57 public static final String ERROR_FEED_DATA = "error_feed_data"; |
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58 |
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59 |
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60 /** |
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61 * This method triggers the FEED operation. |
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62 * |
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63 * @param artifact The artifact that needs to be fed. |
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64 * @param data An array of Data objects that contain the information that |
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65 * are used for the FEED operation. |
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66 * |
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67 * @return a new artifact parsed from the description of FEED. |
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68 */ |
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69 public Artifact feed( |
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70 String locale, |
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71 Artifact artifact, |
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72 Data[] data) |
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73 throws ServerException |
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74 { |
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75 logger.info("StepForwardServiceImpl.feed"); |
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76 |
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77 String url = getServletContext().getInitParameter("server-url"); |
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78 |
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79 Document feed = ClientProtocolUtils.newFeedDocument( |
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80 artifact.getUuid(), |
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81 artifact.getHash(), |
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82 createKVP(data)); |
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83 |
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84 HttpClient client = new HttpClientImpl(url, locale); |
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85 |
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86 try { |
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87 Document description = (Document) client.feed( |
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88 new org.dive4elements.artifacts.httpclient.objects.Artifact( |
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89 artifact.getUuid(), |
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90 artifact.getHash()), |
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91 feed, |
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92 new DocumentResponseHandler()); |
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93 |
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94 if (description == null) { |
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95 logger.warn("StepForwardService.feed() - FAILED"); |
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96 throw new ServerException(ERROR_FEED_DATA); |
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97 } |
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98 |
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99 String result = XMLUtils.xpathString( |
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100 description, |
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101 XPATH_RESULT, |
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102 ArtifactNamespaceContext.INSTANCE); |
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103 |
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104 if (result == null || !result.equals(OPERATION_FAILURE)) { |
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105 logger.debug("StepForwardService.feed() - SUCCESS"); |
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106 return (Artifact) new FLYSArtifactCreator().create(description); |
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107 } |
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108 else if (result != null && result.equals(OPERATION_FAILURE)) { |
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109 String msg = XMLUtils.xpathString( |
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110 description, |
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111 XPATH_RESULT_MSG, |
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112 ArtifactNamespaceContext.INSTANCE); |
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113 throw new ServerException(msg); |
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114 } |
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115 } |
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116 catch (ConnectionException ce) { |
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117 logger.error(ce, ce); |
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118 } |
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119 |
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120 logger.warn("StepForwardService.feed() - FAILED"); |
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121 throw new ServerException(ERROR_FEED_DATA); |
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122 } |
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123 |
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124 |
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125 /** |
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126 * Triggers FEED operation, many artifacts, same data item(s). |
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127 * |
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128 * @param artifacts Artifacts that shall be fed. |
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129 * @param data An array of Data objects that contain the information that |
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130 * are used for the FEED operation. |
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131 * |
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132 * @return a new artifact parsed from the description of FEED. |
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133 */ |
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134 public List<Artifact> feedMany( |
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135 String locale, |
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136 List<Artifact> artifacts, |
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137 Data[] data) |
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138 throws ServerException |
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139 { |
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140 logger.info("StepForwardServiceImpl.feedMany"); |
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141 |
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142 String url = getServletContext().getInitParameter("server-url"); |
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143 |
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144 List<Artifact> resultArtifacts = new ArrayList<Artifact>(); |
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145 |
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146 for (Artifact artifact: artifacts) { |
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147 logger.info("feedMany: Relay to StepForwardServiceImpl.feed"); |
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148 Artifact fedArtifact = feed(locale, artifact, data); |
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149 resultArtifacts.add(fedArtifact); |
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150 } |
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151 |
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152 return resultArtifacts; |
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153 } |
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154 |
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155 |
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156 /** |
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157 * This method creates an array of key/value pairs from an array of Data |
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158 * objects. The string array is used as parameter for the feed() operation. |
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159 * |
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160 * @param data The data that should be transformed into the string array. |
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161 * |
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162 * @return a string array that contains key/value pairs. |
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163 */ |
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164 protected String[][] createKVP(Data[] data) { |
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165 String[][] kvp = new String[data.length][]; |
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166 |
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167 int i = 0; |
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168 |
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169 for (Data d: data) { |
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170 DataItem[] items = d.getItems(); |
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171 String key = d.getLabel(); |
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172 String value = d.getStringValue(); |
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173 |
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174 kvp[i++] = new String[] { key, value }; |
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175 } |
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176 |
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177 return kvp; |
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178 } |
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179 } |
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180 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |