Mercurial > dive4elements > river

annotate gwt-client/src/main/java/org/dive4elements/river/client/server/RiverServiceImpl.java @ 5861:172338b1407f

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GWT client: Added copyright header.
author Sascha L. Teichmann <teichmann@intevation.de>
date Sun, 28 Apr 2013 14:30:15 +0200
parents 5aa05a7a34b7
children ea9eef426962
rev   line source
5861
172338b1407f GWT client: Added copyright header.
Sascha L. Teichmann <teichmann@intevation.de>
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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 org.dive4elements.artifacts.common.ArtifactNamespaceContext;
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12 import org.dive4elements.artifacts.common.utils.XMLUtils;
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13 import org.dive4elements.artifacts.httpclient.exceptions.ConnectionException;
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14 import org.dive4elements.artifacts.httpclient.http.HttpClient;
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15 import org.dive4elements.artifacts.httpclient.http.HttpClientImpl;
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16 import org.dive4elements.river.client.client.services.RiverService;
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17 import org.dive4elements.river.client.server.auth.User;
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18 import org.dive4elements.river.client.shared.exceptions.ServerException;
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19 import org.dive4elements.river.client.shared.model.DefaultRiver;
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20 import org.dive4elements.river.client.shared.model.River;
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21
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22 import java.util.ArrayList;
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23 import java.util.List;
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24
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25 import javax.xml.xpath.XPathConstants;
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27 import org.apache.log4j.Logger;
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28 import org.w3c.dom.Document;
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29 import org.w3c.dom.Element;
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30 import org.w3c.dom.NodeList;
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32
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33 /**
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34 * This interface provides a method to list the supported rivers of the artifact
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35 * server.
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36 *
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37 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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38 */
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39 public class RiverServiceImpl
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40 extends RemoteServiceServlet
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41 implements RiverService
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42 {
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43 /** Private logger. */
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44 private static final Logger logger =
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45 Logger.getLogger(RiverServiceImpl.class);
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46
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47 /** The XPath string that points to the rivers in the resulting document.*/
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48 public static final String XPATH_RIVERS = "/art:rivers/art:river";
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49
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50 /** The error message key that is thrown if an error occured while reading
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51 * the supported rivers from server.*/
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52 public static final String ERROR_NO_RIVERS_FOUND = "error_no_rivers_found";
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54
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55 /** Get river list. */
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56 @Override
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57 public River[] list(String locale)
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58 throws ServerException
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59 {
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60 String url = getServletContext().getInitParameter("server-url");
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61
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62 Document doc = XMLUtils.newDocument();
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63
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64 XMLUtils.ElementCreator ec = new XMLUtils.ElementCreator(
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65 doc,
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66 ArtifactNamespaceContext.NAMESPACE_URI,
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67 ArtifactNamespaceContext.NAMESPACE_PREFIX);
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68
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69 doc.appendChild(ec.create("action"));
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70
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71 HttpClient client = new HttpClientImpl(url, locale);
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72
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73 try {
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74 Document res = client.callService(url, "rivers", doc);
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75
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76 NodeList rivers = (NodeList) XMLUtils.xpath(
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77 res,
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78 XPATH_RIVERS,
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79 XPathConstants.NODESET,
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80 ArtifactNamespaceContext.INSTANCE);
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81
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82 if (rivers == null || rivers.getLength() == 0) {
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83 throw new ServerException(ERROR_NO_RIVERS_FOUND);
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84 }
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85
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86 int count = rivers.getLength();
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87
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88 List<River> theRivers = new ArrayList<River>(count);
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89 User user = this.getUser();
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90
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91 for (int i = 0; i < count; i++) {
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92 Element tmp = (Element)rivers.item(i);
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93
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94 String name = tmp.getAttributeNS(
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95 ArtifactNamespaceContext.NAMESPACE_URI, "name");
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96
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97 if (name.length() > 0
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98 && (user == null || user.canUseFeature("river:" + name))) {
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99 theRivers.add(new DefaultRiver(name));
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100 }
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101 }
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102
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103 return theRivers.toArray(new River[theRivers.size()]);
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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 throw new ServerException(ERROR_NO_RIVERS_FOUND);
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110 }
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111 }
44c63e7fd0d0 Added a service to list the supported rivers of the artifact server. The FLYS instance serves a method that retrieves this list.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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112 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org