Mercurial > dive4elements > river

annotate gwt-client/src/main/java/org/dive4elements/river/client/server/FeedServiceImpl.java @ 9801:1d7a72a50183 3.2.x tip

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Assume Compose V2, consistently
author Tom Gottfried <tom@intevation.de>
date Thu, 23 Nov 2023 10:14:13 +0100
parents 0a5239a1e46e
children
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.logging.log4j.Logger;
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17 import org.apache.logging.log4j.LogManager;
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18
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19 import com.google.gwt.user.server.rpc.RemoteServiceServlet;
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20
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21 import org.dive4elements.artifacts.common.ArtifactNamespaceContext;
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22 import org.dive4elements.artifacts.common.utils.ClientProtocolUtils;
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23 import org.dive4elements.artifacts.common.utils.XMLUtils;
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24
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25 import org.dive4elements.artifacts.httpclient.exceptions.ConnectionException;
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26 import org.dive4elements.artifacts.httpclient.http.HttpClient;
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27 import org.dive4elements.artifacts.httpclient.http.HttpClientImpl;
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28 import org.dive4elements.artifacts.httpclient.http.response.DocumentResponseHandler;
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29
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30 import org.dive4elements.river.client.shared.exceptions.ServerException;
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31 import org.dive4elements.river.client.shared.model.Artifact;
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32 import org.dive4elements.river.client.shared.model.Data;
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33 import org.dive4elements.river.client.shared.model.DataItem;
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34 import org.dive4elements.river.client.client.services.FeedService;
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35
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36 /**
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37 * This interface provides a method that bundles the artifact specific
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38 * operation FEED.
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39 */
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40 public class FeedServiceImpl
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41 extends RemoteServiceServlet
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42 implements FeedService
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43 {
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44 private static final Logger log = LogManager.getLogger(FeedServiceImpl.class);
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45
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46
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47 /** XPath that points to the result type of a feed or advance operation.*/
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48 public static final String XPATH_RESULT = "/art:result/@art:type";
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49
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50 /** XPath that points to the result type of a feed or advance operation.*/
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51 public static final String XPATH_RESULT_MSG = "/art:result/text()";
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52
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53 /** A constant that marks errors.*/
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54 public static final String OPERATION_FAILURE = "FAILURE";
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55
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56 /** The error message key that is thrown if an error occured while feeding
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57 * new data.*/
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58 public static final String ERROR_FEED_DATA = "error_feed_data";
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59
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60
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61 /**
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62 * This method triggers the FEED operation.
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63 *
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64 * @param artifact The artifact that needs to be fed.
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65 * @param data An array of Data objects that contain the information that
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66 * are used for the FEED operation.
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67 *
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68 * @return a new artifact parsed from the description of FEED.
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69 */
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70 public Artifact feed(
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71 String locale,
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72 Artifact artifact,
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73 Data[] data)
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74 throws ServerException
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75 {
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76 log.info("StepForwardServiceImpl.feed");
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77
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78 String url = getServletContext().getInitParameter("server-url");
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79
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80 Document feed = ClientProtocolUtils.newFeedDocument(
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81 artifact.getUuid(),
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82 artifact.getHash(),
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83 createKVP(data));
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84
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85 HttpClient client = new HttpClientImpl(url, locale);
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86
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87 try {
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88 Document description = (Document) client.feed(
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89 new org.dive4elements.artifacts.httpclient.objects.Artifact(
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90 artifact.getUuid(),
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91 artifact.getHash()),
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92 feed,
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93 new DocumentResponseHandler());
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94
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95 if (description == null) {
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96 log.warn("StepForwardService.feed() - FAILED");
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97 throw new ServerException(ERROR_FEED_DATA);
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98 }
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99
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100 String result = XMLUtils.xpathString(
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101 description,
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102 XPATH_RESULT,
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103 ArtifactNamespaceContext.INSTANCE);
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104
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105 if (result == null || !result.equals(OPERATION_FAILURE)) {
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106 log.debug("StepForwardService.feed() - SUCCESS");
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107 return (Artifact) new FLYSArtifactCreator().create(description);
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108 }
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109 else if (result != null && result.equals(OPERATION_FAILURE)) {
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110 String msg = XMLUtils.xpathString(
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111 description,
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112 XPATH_RESULT_MSG,
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113 ArtifactNamespaceContext.INSTANCE);
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114 throw new ServerException(msg);
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115 }
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116 }
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117 catch (ConnectionException ce) {
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118 log.error(ce, ce);
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119 }
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120
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121 log.warn("StepForwardService.feed() - FAILED");
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122 throw new ServerException(ERROR_FEED_DATA);
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123 }
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124
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125
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126 /**
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127 * Triggers FEED operation, many artifacts, same data item(s).
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128 *
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129 * @param artifacts Artifacts that shall be fed.
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130 * @param data An array of Data objects that contain the information that
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131 * are used for the FEED operation.
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132 *
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133 * @return a new artifact parsed from the description of FEED.
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134 */
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135 public List<Artifact> feedMany(
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136 String locale,
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137 List<Artifact> artifacts,
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138 Data[] data)
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139 throws ServerException
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140 {
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141 log.info("StepForwardServiceImpl.feedMany");
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142
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143 String url = getServletContext().getInitParameter("server-url");
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144
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145 List<Artifact> resultArtifacts = new ArrayList<Artifact>();
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146
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147 for (Artifact artifact: artifacts) {
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148 log.info("feedMany: Relay to StepForwardServiceImpl.feed");
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149 Artifact fedArtifact = feed(locale, artifact, data);
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150 resultArtifacts.add(fedArtifact);
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151 }
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152
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153 return resultArtifacts;
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154 }
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155
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156
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157 /**
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158 * This method creates an array of key/value pairs from an array of Data
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159 * objects. The string array is used as parameter for the feed() operation.
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160 *
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161 * @param data The data that should be transformed into the string array.
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162 *
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163 * @return a string array that contains key/value pairs.
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164 */
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165 protected String[][] createKVP(Data[] data) {
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166 String[][] kvp = new String[data.length][];
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167
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168 int i = 0;
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169
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170 for (Data d: data) {
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171 DataItem[] items = d.getItems();
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172 String key = d.getLabel();
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173 String value = d.getStringValue();
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174
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175 kvp[i++] = new String[] { key, value };
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176 }
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177
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178 return kvp;
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179 }
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180 }
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181 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org