Mercurial > dive4elements > river

annotate flys-client/src/main/java/de/intevation/flys/client/server/UserCollectionsServiceImpl.java @ 4043:eb5564662e19

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Cosmetics, documentation.
author Felix Wolfsteller <felix.wolfsteller@intevation.de>
date Fri, 05 Oct 2012 15:36:42 +0200
parents 0de61fc9d281
children 523cd27b4c42
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 java.util.ArrayList;
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4 import java.util.Date;
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5 import java.util.List;
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6
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7 import javax.xml.xpath.XPathConstants;
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8
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9 import org.w3c.dom.Document;
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10 import org.w3c.dom.Element;
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11 import org.w3c.dom.NodeList;
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12
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13 import org.apache.log4j.Logger;
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15 import com.google.gwt.user.server.rpc.RemoteServiceServlet;
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16
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17 import de.intevation.artifacts.common.ArtifactNamespaceContext;
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18 import de.intevation.artifacts.common.utils.XMLUtils;
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19
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20 import de.intevation.artifacts.httpclient.exceptions.ConnectionException;
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21 import de.intevation.artifacts.httpclient.http.HttpClient;
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22 import de.intevation.artifacts.httpclient.http.HttpClientImpl;
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23
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24 import de.intevation.flys.client.shared.model.Collection;
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25 import de.intevation.flys.client.shared.model.DefaultCollection;
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26 import de.intevation.flys.client.client.services.UserCollectionsService;
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27
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28
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29 /**
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30 * This service returns a list of collections owned by a specified user.
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31 * <b>NOTE:</b> The Collections returned by this service provide no information
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32 * about the CollectionItems or OutputModes of the Collection. You need to fetch
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33 * these information explicitly using another service.
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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 UserCollectionsServiceImpl
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38 extends RemoteServiceServlet
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39 implements UserCollectionsService
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40 {
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41 private static final Logger logger = Logger.getLogger(
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42 UserCollectionsServiceImpl.class);
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43
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44
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45 public Collection[] getUserCollections(String locale, String userid) {
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46 logger.info("UserCollectionsServiceImpl.getUserCollections");
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47
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48 String serverUrl = getServletContext().getInitParameter("server-url");
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49 HttpClient client = new HttpClientImpl(serverUrl, locale);
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50
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51 try {
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52 Document result = client.listUserCollections(userid);
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53
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54 NodeList list = (NodeList) XMLUtils.xpath(
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55 result,
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56 "/art:artifact-collections/art:artifact-collection",
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57 XPathConstants.NODESET,
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58 ArtifactNamespaceContext.INSTANCE);
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59
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60 if (list == null || list.getLength() == 0) {
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61 logger.debug("No collection found for user: " + userid);
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62 return null;
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63 }
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64
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65 int num = list.getLength();
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66
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67 List<Collection> all = new ArrayList<Collection>(num);
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68
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69 for (int i = 0; i < num; i++) {
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70 Collection c = createCollection((Element) list.item(i));
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71
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72 if (c != null) {
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73 all.add(c);
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74 }
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75 }
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76
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77 logger.debug("User has " + all.size() + " collections.");
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78
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79 return all.toArray(new Collection[all.size()]);
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80 }
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81 catch (ConnectionException ce) {
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82 logger.error(ce, ce);
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83 }
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84
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85 logger.debug("No user collections found.");
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86 return null;
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87 }
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88
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89
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90 /**
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91 * Extracts a SimpleCollection from <i>node</i>.
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92 *
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93 * @param node Contains information about a collection.
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94 *
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95 * @return a list of Simplecollections.
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96 */
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97 protected Collection createCollection(Element node) {
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98 String uri = ArtifactNamespaceContext.NAMESPACE_URI;
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99
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100 String creationStr = node.getAttributeNS(uri, "creation");
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101 String name = node.getAttributeNS(uri, "name");
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102 String uuid = node.getAttributeNS(uri, "uuid");
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103 String ttlStr = node.getAttributeNS(uri, "ttl");
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104
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105 if (uuid != null && ttlStr != null) {
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106 try {
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107 long time = Long.parseLong(creationStr);
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108 long ttl = Long.parseLong(ttlStr);
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109 return new DefaultCollection(uuid, ttl, name, new Date(time));
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110 }
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111 catch (NumberFormatException nfe) {
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112 logger.warn("Error while parsing collection attributes.");
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113 return null;
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114 }
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115 }
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116
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
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117 logger.warn("Found an invalid Collection.");
96
261a2ee7d9bb Added a service that returns the collections of a specified user.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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118 return null;
261a2ee7d9bb Added a service that returns the collections of a specified user.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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119 }
261a2ee7d9bb Added a service that returns the collections of a specified user.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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120 }
261a2ee7d9bb Added a service that returns the collections of a specified user.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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121 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
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