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annotate flys-client/src/main/java/de/intevation/flys/client/server/FeedServiceImpl.java @ 4910:a707ef048188

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author Raimund Renkert <rrenkert@intevation.de>
date Wed, 30 Jan 2013 14:42:17 +0100
parents d0a9acddbea2
children
rev   line source
851
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1 package de.intevation.flys.client.server;
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2
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3 import java.util.ArrayList;
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4 import java.util.List;
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5
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6 import org.w3c.dom.Document;
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7
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8 import org.apache.log4j.Logger;
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9
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10 import com.google.gwt.user.server.rpc.RemoteServiceServlet;
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11
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12 import de.intevation.artifacts.common.ArtifactNamespaceContext;
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13 import de.intevation.artifacts.common.utils.ClientProtocolUtils;
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14 import de.intevation.artifacts.common.utils.XMLUtils;
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15
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16 import de.intevation.artifacts.httpclient.exceptions.ConnectionException;
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17 import de.intevation.artifacts.httpclient.http.HttpClient;
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18 import de.intevation.artifacts.httpclient.http.HttpClientImpl;
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19 import de.intevation.artifacts.httpclient.http.response.DocumentResponseHandler;
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20
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21 import de.intevation.flys.client.shared.exceptions.ServerException;
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22 import de.intevation.flys.client.shared.model.Artifact;
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23 import de.intevation.flys.client.shared.model.Data;
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24 import de.intevation.flys.client.shared.model.DataItem;
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25 import de.intevation.flys.client.client.services.FeedService;
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26
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27 /**
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28 * This interface provides a method that bundles the artifact specific
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29 * operation FEED.
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30 */
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31 public class FeedServiceImpl
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32 extends RemoteServiceServlet
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33 implements FeedService
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34 {
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35 private static final Logger logger = Logger.getLogger(FeedServiceImpl.class);
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36
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37
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38 /** XPath that points to the result type of a feed or advance operation.*/
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39 public static final String XPATH_RESULT = "/art:result/@art:type";
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40
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41 /** XPath that points to the result type of a feed or advance operation.*/
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42 public static final String XPATH_RESULT_MSG = "/art:result/text()";
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43
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44 /** A constant that marks errors.*/
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45 public static final String OPERATION_FAILURE = "FAILURE";
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46
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47 /** The error message key that is thrown if an error occured while feeding
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48 * new data.*/
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49 public static final String ERROR_FEED_DATA = "error_feed_data";
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50
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51
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52 /**
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53 * This method triggers the FEED operation.
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54 *
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55 * @param artifact The artifact that needs to be fed.
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56 * @param data An array of Data objects that contain the information that
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57 * are used for the FEED operation.
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58 *
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59 * @return a new artifact parsed from the description of FEED.
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60 */
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61 public Artifact feed(
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62 String locale,
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63 Artifact artifact,
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64 Data[] data)
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65 throws ServerException
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66 {
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67 logger.info("StepForwardServiceImpl.feed");
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68
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69 String url = getServletContext().getInitParameter("server-url");
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70
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71 Document feed = ClientProtocolUtils.newFeedDocument(
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72 artifact.getUuid(),
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73 artifact.getHash(),
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74 createKVP(data));
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75
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76 HttpClient client = new HttpClientImpl(url, locale);
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77
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78 try {
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79 Document description = (Document) client.feed(
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80 new de.intevation.artifacts.httpclient.objects.Artifact(
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81 artifact.getUuid(),
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82 artifact.getHash()),
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83 feed,
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84 new DocumentResponseHandler());
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85
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86 if (description == null) {
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87 logger.warn("StepForwardService.feed() - FAILED");
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88 throw new ServerException(ERROR_FEED_DATA);
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89 }
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90
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91 String result = XMLUtils.xpathString(
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92 description,
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93 XPATH_RESULT,
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94 ArtifactNamespaceContext.INSTANCE);
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95
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96 if (result == null || !result.equals(OPERATION_FAILURE)) {
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97 logger.debug("StepForwardService.feed() - SUCCESS");
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98 return (Artifact) new FLYSArtifactCreator().create(description);
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99 }
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100 else if (result != null && result.equals(OPERATION_FAILURE)) {
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101 String msg = XMLUtils.xpathString(
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102 description,
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103 XPATH_RESULT_MSG,
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104 ArtifactNamespaceContext.INSTANCE);
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105 throw new ServerException(msg);
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106 }
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107 }
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108 catch (ConnectionException ce) {
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109 logger.error(ce, ce);
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110 }
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111
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112 logger.warn("StepForwardService.feed() - FAILED");
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113 throw new ServerException(ERROR_FEED_DATA);
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114 }
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115
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116
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117 /**
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118 * Triggers FEED operation, many artifacts, same data item(s).
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119 *
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120 * @param artifacts Artifacts that shall be fed.
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121 * @param data An array of Data objects that contain the information that
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122 * are used for the FEED operation.
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123 *
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124 * @return a new artifact parsed from the description of FEED.
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125 */
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126 public List<Artifact> feedMany(
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127 String locale,
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128 List<Artifact> artifacts,
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129 Data[] data)
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130 throws ServerException
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131 {
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132 logger.info("StepForwardServiceImpl.feedMany");
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133
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134 String url = getServletContext().getInitParameter("server-url");
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135
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136 List<Artifact> resultArtifacts = new ArrayList<Artifact>();
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137
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138 for (Artifact artifact: artifacts) {
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139 logger.info("feedMany: Relay to StepForwardServiceImpl.feed");
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140 Artifact fedArtifact = feed(locale, artifact, data);
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141 resultArtifacts.add(fedArtifact);
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142 }
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143
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144 return resultArtifacts;
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145 }
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146
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147
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148 /**
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149 * This method creates an array of key/value pairs from an array of Data
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150 * objects. The string array is used as parameter for the feed() operation.
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151 *
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152 * @param data The data that should be transformed into the string array.
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153 *
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154 * @return a string array that contains key/value pairs.
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155 */
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156 protected String[][] createKVP(Data[] data) {
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157 String[][] kvp = new String[data.length][];
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158
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159 int i = 0;
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160
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161 for (Data d: data) {
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162 DataItem[] items = d.getItems();
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163 String key = d.getLabel();
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164 String value = d.getStringValue();
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165
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166 kvp[i++] = new String[] { key, value };
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167 }
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168
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169 return kvp;
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170 }
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171 }
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172 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org