Mercurial > dive4elements > gnv-client

annotate gnv/src/main/java/de/intevation/gnv/action/LoadAction.java @ 963:0441e78cd900

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Add more Javadocs gnv/trunk@1107 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Tim Englich <tim.englich@intevation.de>
date Tue, 18 May 2010 11:09:33 +0000
parents 21735fb8d29b
children 33198e55371c
rev   line source
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1 package de.intevation.gnv.action;
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2
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3 import java.io.IOException;
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4 import java.io.InputStream;
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5 import java.util.List;
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6
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7 import javax.servlet.http.HttpServletRequest;
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8 import javax.servlet.http.HttpServletResponse;
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9
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10 import org.apache.commons.fileupload.FileItemIterator;
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11 import org.apache.commons.fileupload.FileItemStream;
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12 import org.apache.commons.fileupload.servlet.ServletFileUpload;
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13 import org.apache.log4j.Logger;
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14 import org.apache.struts.action.ActionForm;
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15 import org.apache.struts.action.ActionForward;
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16 import org.apache.struts.action.ActionMapping;
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17 import org.w3c.dom.Document;
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18
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19 import de.intevation.gnv.action.sessionmodel.SessionModel;
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20 import de.intevation.gnv.action.sessionmodel.SessionModelFactory;
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21 import de.intevation.gnv.artifactdatabase.client.ArtifactDatabaseClient;
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22 import de.intevation.gnv.artifactdatabase.client.ArtifactDatabaseClientFactory;
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23 import de.intevation.gnv.artifactdatabase.client.exception.ArtifactDatabaseClientException;
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24 import de.intevation.gnv.artifactdatabase.objects.Artifact;
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25 import de.intevation.gnv.artifactdatabase.objects.ArtifactFactory;
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26 import de.intevation.gnv.util.ArtifactNamespaceContext;
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27 import de.intevation.gnv.util.XMLUtils;
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28
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29 /**
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30 * This controller is called for reloading projects from xml files. It waits for
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31 * an xml document named 'document' and feeds the artifact server with this
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32 * document. After a successful feed, the artifact description is fetched and
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33 * displayed in the gui.
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34 *
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35 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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36 */
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37 public class LoadAction extends ArtifactDatabaseActionBase {
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38
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39 public static final String RESOURCE_UPLOAD_FAILURE = "upload.failure";
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40 public static final String RESOURCE_INVALID_ARTIFACT = "invalid.artifact";
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41
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42 /**
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43 * the logger, used to log exceptions and additonaly information
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44 */
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45 private static Logger logger = Logger.getLogger(LoadAction.class);
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46
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47 /**
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48 * Constructor
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49 */
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50 public LoadAction() {
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51 super();
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52 }
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53
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54 @Override
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55 public ActionForward execute(
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56 ActionMapping mapping,
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57 ActionForm form,
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58 HttpServletRequest request,
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59 HttpServletResponse response)
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60 throws Exception
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61 {
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62 logger.info("Import artifact.");
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63
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64 ServletFileUpload upload = new ServletFileUpload();
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65 Document artifactDocument = null;
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66
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67 try {
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68 FileItemIterator iter = upload.getItemIterator(request);
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69 while (iter.hasNext()) {
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70 FileItemStream item = (FileItemStream) iter.next();
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71 String name = item.getFieldName();
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72
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73 // the file input field of our form is named 'document'
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74 if (name.equals("document")) {
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75 InputStream stream = item.openStream();
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76
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77 if (stream.available() == 0) {
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78 logger.error("No artifact document found.");
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79 request.setAttribute(
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80 CommunicationKeys.REQUEST_EXCEPTION_PROJECT,
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81 RESOURCE_UPLOAD_FAILURE);
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82
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83 return super.getExceptionForward(mapping);
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84 }
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85
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86 artifactDocument = XMLUtils.readDocument(stream);
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87 if (artifactDocument == null) {
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88 request.setAttribute(
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89 CommunicationKeys.REQUEST_EXCEPTION_PROJECT,
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90 RESOURCE_INVALID_ARTIFACT);
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91
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92 return super.getExceptionForward(mapping);
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93 }
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94
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95 try {
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96 ArtifactDatabaseClientFactory adcf =
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97 ArtifactDatabaseClientFactory.getInstance();
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98 ArtifactDatabaseClient adc =
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99 adcf.getArtifactDatabaseClient(getLocale(request));
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100 ArtifactFactory factory = (ArtifactFactory)
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101 (( List)adc.getArtifactFactories()).get(0);
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102
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103 SessionModelFactory sf =
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104 SessionModelFactory.getInstance();
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105 SessionModel sm = sf.getSessionModel(request);
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106 sm.selectArtifactFactory(factory.getId());
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107
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108 Document describe = adc.doImport(
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109 factory,
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110 artifactDocument);
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111
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112 String uuid = XMLUtils.xpathString(
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113 describe,
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114 "/art:result/art:uuid/@value",
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115 ArtifactNamespaceContext.INSTANCE);
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116 String hash = XMLUtils.xpathString(
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117 describe,
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118 "/art:result/art:hash/@value",
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119 ArtifactNamespaceContext.INSTANCE);
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120
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121 Artifact artifact = new Artifact(uuid, hash);
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122 sm.setCurrentArtifact(artifact);
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123
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124 if (logger.isDebugEnabled()) {
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125 logger.debug(
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126 "Imported artifact UUID: "+artifact.getId());
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127 logger.debug(
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128 "Imported artifact HASH: "+artifact.getHash());
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129 }
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130 }
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131 catch (ArtifactDatabaseClientException adce) {
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132 logger.error(adce, adce);
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133 request.setAttribute(
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134 CommunicationKeys.REQUEST_EXCEPTION_MESSAGE_ID,
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135 adce.getMessage());
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136
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137 // XXX
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138 return super.getExceptionForward(mapping);
673
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139 }
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140
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141 return new DescribeUIAction().execute(
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142 mapping, form, request, response);
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143 }
670
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144 }
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145 }
673
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146 catch (IOException ioe) {
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147 logger.error(ioe, ioe);
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148 request.setAttribute(
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149 CommunicationKeys.REQUEST_EXCEPTION_PROJECT,
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150 ioe.getMessage());
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151
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152 return super.getExceptionForward(mapping);
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153 }
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154
673
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155 // no document found or not valid
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156 logger.error("Upload failure: No document found or invalid.");
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157
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158 request.setAttribute(
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159 CommunicationKeys.REQUEST_EXCEPTION_PROJECT,
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160 RESOURCE_UPLOAD_FAILURE);
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161
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162 return super.getExceptionForward(mapping);
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163 }
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164 }
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165 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org