Mercurial > dive4elements > river

annotate gwt-client/src/main/java/org/dive4elements/river/client/server/FeedServiceImpl.java @ 8203:238fc722f87a

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sed 's/logger/log/g' src/**/*.java
author Sascha L. Teichmann <teichmann@intevation.de>
date Fri, 05 Sep 2014 13:19:22 +0200
parents ea9eef426962
children 0a5239a1e46e
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 log = 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 log.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 log.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 log.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 log.error(ce, ce);
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118 }
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119
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120 log.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 log.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 log.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 :
http://dive4elements.wald.intevation.org