Mercurial > dive4elements > river
annotate flys-client/src/main/java/de/intevation/flys/client/server/FeedServiceImpl.java @ 1449:8da36efc839a
Removed unused imports.
flys-client/trunk@3466 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
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date | Mon, 19 Dec 2011 15:38:10 +0000 |
parents | bc06a671ef60 |
children | e8706fec0ee9 |
rev | line source |
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1 package de.intevation.flys.client.server; |
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2 |
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3 import org.w3c.dom.Document; |
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4 |
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5 import org.apache.log4j.Logger; |
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6 |
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7 import com.google.gwt.user.server.rpc.RemoteServiceServlet; |
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8 |
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9 import de.intevation.artifacts.common.ArtifactNamespaceContext; |
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10 import de.intevation.artifacts.common.utils.ClientProtocolUtils; |
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11 import de.intevation.artifacts.common.utils.XMLUtils; |
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12 |
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13 import de.intevation.artifacts.httpclient.exceptions.ConnectionException; |
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14 import de.intevation.artifacts.httpclient.http.HttpClient; |
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15 import de.intevation.artifacts.httpclient.http.HttpClientImpl; |
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16 import de.intevation.artifacts.httpclient.http.response.DocumentResponseHandler; |
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17 |
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18 import de.intevation.flys.client.shared.exceptions.ServerException; |
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19 import de.intevation.flys.client.shared.model.Artifact; |
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20 import de.intevation.flys.client.shared.model.Data; |
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21 import de.intevation.flys.client.shared.model.DataItem; |
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22 import de.intevation.flys.client.client.services.FeedService; |
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23 |
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24 /** |
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25 * This interface provides a method that bundles the artifact specific |
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26 * operation FEED. |
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27 */ |
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28 public class FeedServiceImpl |
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29 extends RemoteServiceServlet |
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30 implements FeedService |
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31 { |
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32 private static final Logger logger = Logger.getLogger(FeedServiceImpl.class); |
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33 |
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34 |
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35 /** XPath that points to the result type of a feed or advance operation.*/ |
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36 public static final String XPATH_RESULT = "/art:result/@art:type"; |
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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_MSG = "/art:result/text()"; |
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40 |
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41 /** A constant that marks errors.*/ |
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42 public static final String OPERATION_FAILURE = "FAILURE"; |
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43 |
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44 /** The error message key that is thrown if an error occured while feeding |
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45 * new data.*/ |
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46 public static final String ERROR_FEED_DATA = "error_feed_data"; |
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47 |
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48 |
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49 /** |
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50 * This method triggers the FEED operation. |
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51 * |
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52 * @param artifact The artifact that needs to be fed. |
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53 * @param data An array of Data objects that contain the information that |
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54 * are used for the FEED operation. |
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55 * |
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56 * @return a new artifact parsed from the description of FEED. |
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57 */ |
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58 public Artifact feed( |
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59 String locale, |
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60 Artifact artifact, |
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61 Data[] data) |
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62 throws ServerException |
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63 { |
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64 logger.info("StepForwardServiceImpl.feed"); |
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65 |
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66 String url = getServletContext().getInitParameter("server-url"); |
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67 |
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68 Document feed = ClientProtocolUtils.newFeedDocument( |
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69 artifact.getUuid(), |
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70 artifact.getHash(), |
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71 createKVP(data)); |
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72 |
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73 HttpClient client = new HttpClientImpl(url, locale); |
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74 |
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75 try { |
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76 Document description = (Document) client.feed( |
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77 new de.intevation.artifacts.httpclient.objects.Artifact( |
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78 artifact.getUuid(), |
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79 artifact.getHash()), |
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80 feed, |
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81 new DocumentResponseHandler()); |
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82 |
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83 if (description == null) { |
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84 logger.warn("StepForwardService.feed() - FAILED"); |
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85 throw new ServerException(ERROR_FEED_DATA); |
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86 } |
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87 |
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88 String result = XMLUtils.xpathString( |
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89 description, |
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90 XPATH_RESULT, |
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91 ArtifactNamespaceContext.INSTANCE); |
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92 |
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93 if (result == null || !result.equals(OPERATION_FAILURE)) { |
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94 logger.debug("StepForwardService.feed() - SUCCESS"); |
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95 return (Artifact) new FLYSArtifactCreator().create(description); |
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96 } |
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97 else if (result != null && result.equals(OPERATION_FAILURE)) { |
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98 String msg = XMLUtils.xpathString( |
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99 description, |
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100 XPATH_RESULT_MSG, |
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101 ArtifactNamespaceContext.INSTANCE); |
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102 throw new ServerException(msg); |
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103 } |
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104 } |
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105 catch (ConnectionException ce) { |
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106 logger.error(ce, ce); |
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107 } |
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108 |
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109 logger.warn("StepForwardService.feed() - FAILED"); |
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110 throw new ServerException(ERROR_FEED_DATA); |
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111 } |
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112 |
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113 |
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114 /** |
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115 * This method creates an array of key/value pairs from an array of Data |
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116 * objects. The string array is used as parameter for the feed() operation. |
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117 * |
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118 * @param data The data that should be transformed into the string array. |
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119 * |
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120 * @return a string array that contains key/value pairs. |
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121 */ |
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122 protected String[][] createKVP(Data[] data) { |
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123 String[][] kvp = new String[data.length][]; |
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124 |
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125 int i = 0; |
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126 |
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127 for (Data d: data) { |
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128 DataItem[] items = d.getItems(); |
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129 String key = d.getLabel(); |
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130 String value = items[0].getStringValue(); |
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131 |
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132 kvp[i++] = new String[] { key, value }; |
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133 } |
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134 |
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135 return kvp; |
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136 } |
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137 } |
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138 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |