Mercurial > dive4elements > gnv-client

annotate gnv/src/main/java/de/intevation/gnv/action/LoadAction.java @ 714:21735fb8d29b

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Display an error message if the artifact server is down but the user tried to load an artifat (issue258). gnv/trunk@985 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Mon, 26 Apr 2010 10:32:22 +0000
parents af22fa5567a6
children 0441e78cd900
rev   line source
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1 package de.intevation.gnv.action;
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2
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3 import de.intevation.gnv.action.sessionmodel.SessionModel;
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4 import de.intevation.gnv.action.sessionmodel.SessionModelFactory;
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5
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6 import de.intevation.gnv.artifactdatabase.client.ArtifactDatabaseClient;
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7 import de.intevation.gnv.artifactdatabase.client.ArtifactDatabaseClientFactory;
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8
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9 import de.intevation.gnv.artifactdatabase.client.exception.ArtifactDatabaseClientException;
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10
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11 import de.intevation.gnv.artifactdatabase.objects.Artifact;
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12 import de.intevation.gnv.artifactdatabase.objects.ArtifactFactory;
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13
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14 import de.intevation.gnv.util.ArtifactNamespaceContext;
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15 import de.intevation.gnv.util.XMLUtils;
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16
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17 import java.io.IOException;
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18 import java.io.InputStream;
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19
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20 import java.util.List;
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21
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22 import javax.servlet.http.HttpServletRequest;
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23 import javax.servlet.http.HttpServletResponse;
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24
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25 import org.apache.commons.fileupload.FileItemIterator;
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26 import org.apache.commons.fileupload.FileItemStream;
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27
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28 import org.apache.commons.fileupload.servlet.ServletFileUpload;
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29
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30 import org.apache.log4j.Logger;
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31
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32 import org.apache.struts.action.ActionForm;
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33 import org.apache.struts.action.ActionForward;
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34 import org.apache.struts.action.ActionMapping;
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35
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36 import org.w3c.dom.Document;
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37
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38 /**
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39 * This controller is called for reloading projects from xml files. It waits for
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40 * an xml document named 'document' and feeds the artifact server with this
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41 * document. After a successful feed, the artifact description is fetched and
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42 * displayed in the gui.
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43 *
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44 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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45 */
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46 public class LoadAction extends ArtifactDatabaseActionBase {
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47
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48 public static final String RESOURCE_UPLOAD_FAILURE = "upload.failure";
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49 public static final String RESOURCE_INVALID_ARTIFACT = "invalid.artifact";
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50
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51 private static Logger logger = Logger.getLogger(LoadAction.class);
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52
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53 public LoadAction() {
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54 super();
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55 }
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56
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57 public ActionForward execute(
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58 ActionMapping mapping,
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59 ActionForm form,
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60 HttpServletRequest request,
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61 HttpServletResponse response)
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62 throws Exception
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63 {
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64 logger.info("Import artifact.");
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65
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66 ServletFileUpload upload = new ServletFileUpload();
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67 Document artifactDocument = null;
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68
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69 try {
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70 FileItemIterator iter = upload.getItemIterator(request);
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71 while (iter.hasNext()) {
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72 FileItemStream item = (FileItemStream) iter.next();
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73 String name = item.getFieldName();
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74
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75 // the file input field of our form is named 'document'
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76 if (name.equals("document")) {
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77 InputStream stream = item.openStream();
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78
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79 if (stream.available() == 0) {
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80 logger.error("No artifact document found.");
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81 request.setAttribute(
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82 CommunicationKeys.REQUEST_EXCEPTION_PROJECT,
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83 RESOURCE_UPLOAD_FAILURE);
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84
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85 return super.getExceptionForward(mapping);
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86 }
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87
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88 artifactDocument = XMLUtils.readDocument(stream);
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89 if (artifactDocument == null) {
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90 request.setAttribute(
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91 CommunicationKeys.REQUEST_EXCEPTION_PROJECT,
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92 RESOURCE_INVALID_ARTIFACT);
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93
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94 return super.getExceptionForward(mapping);
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95 }
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96
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97 try {
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98 ArtifactDatabaseClientFactory adcf =
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99 ArtifactDatabaseClientFactory.getInstance();
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100 ArtifactDatabaseClient adc =
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101 adcf.getArtifactDatabaseClient(getLocale(request));
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102 ArtifactFactory factory = (ArtifactFactory)
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103 (( List)adc.getArtifactFactories()).get(0);
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104
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105 SessionModelFactory sf =
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106 SessionModelFactory.getInstance();
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107 SessionModel sm = sf.getSessionModel(request);
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108 sm.selectArtifactFactory(factory.getId());
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109
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110 Document describe = adc.doImport(
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111 factory,
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112 artifactDocument);
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113
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114 String uuid = XMLUtils.xpathString(
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115 describe,
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116 "/art:result/art:uuid/@value",
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117 ArtifactNamespaceContext.INSTANCE);
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118 String hash = XMLUtils.xpathString(
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119 describe,
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120 "/art:result/art:hash/@value",
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121 ArtifactNamespaceContext.INSTANCE);
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122
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123 Artifact artifact = new Artifact(uuid, hash);
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124 sm.setCurrentArtifact(artifact);
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125
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126 if (logger.isDebugEnabled()) {
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127 logger.debug(
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128 "Imported artifact UUID: "+artifact.getId());
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129 logger.debug(
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130 "Imported artifact HASH: "+artifact.getHash());
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131 }
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132 }
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133 catch (ArtifactDatabaseClientException adce) {
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134 logger.error(adce, adce);
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135 request.setAttribute(
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136 CommunicationKeys.REQUEST_EXCEPTION_MESSAGE_ID,
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137 adce.getMessage());
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138
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139 // XXX
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140 return super.getExceptionForward(mapping);
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141 }
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142
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143 return new DescribeUIAction().execute(
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144 mapping, form, request, response);
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145 }
670
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146 }
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147 }
673
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148 catch (IOException ioe) {
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149 logger.error(ioe, ioe);
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150 request.setAttribute(
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151 CommunicationKeys.REQUEST_EXCEPTION_PROJECT,
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152 ioe.getMessage());
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153
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154 return super.getExceptionForward(mapping);
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155 }
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156
673
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157 // no document found or not valid
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158 logger.error("Upload failure: No document found or invalid.");
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159
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160 request.setAttribute(
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161 CommunicationKeys.REQUEST_EXCEPTION_PROJECT,
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162 RESOURCE_UPLOAD_FAILURE);
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163
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164 return super.getExceptionForward(mapping);
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165 }
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166 }
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167 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org