Mercurial > dive4elements > river

annotate flys-client/src/main/java/de/intevation/flys/client/server/RiverServiceImpl.java @ 4740:fb135e1dfa35

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Added 'type' attribute to <dc:variable/> element. If an optional 'type' attribute is given the result of the XPATH expression is interpreted as this type. Valid values are 'number', 'bool', 'node' and 'nodeset'. All other defaults to 'string' which also is the default if nor type is given.
author Sascha L. Teichmann <teichmann@intevation.de>
date Wed, 02 Jan 2013 15:31:53 +0100
parents fed914a42a10
children
rev   line source
29
44c63e7fd0d0 Added a service to list the supported rivers of the artifact server. The FLYS instance serves a method that retrieves this list.
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1 package de.intevation.flys.client.server;
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2
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3 import de.intevation.artifacts.common.ArtifactNamespaceContext;
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4 import de.intevation.artifacts.common.utils.XMLUtils;
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5 import de.intevation.artifacts.httpclient.exceptions.ConnectionException;
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6 import de.intevation.artifacts.httpclient.http.HttpClient;
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7 import de.intevation.artifacts.httpclient.http.HttpClientImpl;
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8 import de.intevation.flys.client.client.services.RiverService;
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9 import de.intevation.flys.client.server.auth.User;
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10 import de.intevation.flys.client.shared.exceptions.ServerException;
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11 import de.intevation.flys.client.shared.model.DefaultRiver;
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12 import de.intevation.flys.client.shared.model.River;
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14 import java.util.ArrayList;
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15 import java.util.List;
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17 import javax.xml.xpath.XPathConstants;
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19 import org.apache.log4j.Logger;
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20 import org.w3c.dom.Document;
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21 import org.w3c.dom.Element;
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22 import org.w3c.dom.NodeList;
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25 /**
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26 * This interface provides a method to list the supported rivers of the artifact
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27 * server.
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28 *
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29 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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30 */
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31 public class RiverServiceImpl
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32 extends RemoteServiceServlet
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33 implements RiverService
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34 {
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35 /** Private logger. */
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36 private static final Logger logger =
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37 Logger.getLogger(RiverServiceImpl.class);
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39 /** The XPath string that points to the rivers in the resulting document.*/
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40 public static final String XPATH_RIVERS = "/art:rivers/art:river";
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42 /** The error message key that is thrown if an error occured while reading
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43 * the supported rivers from server.*/
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44 public static final String ERROR_NO_RIVERS_FOUND = "error_no_rivers_found";
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47 /** Get river list. */
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48 @Override
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49 public River[] list(String locale)
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50 throws ServerException
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51 {
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52 String url = getServletContext().getInitParameter("server-url");
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53
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54 Document doc = XMLUtils.newDocument();
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56 XMLUtils.ElementCreator ec = new XMLUtils.ElementCreator(
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57 doc,
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58 ArtifactNamespaceContext.NAMESPACE_URI,
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59 ArtifactNamespaceContext.NAMESPACE_PREFIX);
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61 doc.appendChild(ec.create("action"));
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62
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63 HttpClient client = new HttpClientImpl(url, locale);
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64
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65 try {
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66 Document res = client.callService(url, "rivers", doc);
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68 NodeList rivers = (NodeList) XMLUtils.xpath(
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69 res,
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70 XPATH_RIVERS,
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71 XPathConstants.NODESET,
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72 ArtifactNamespaceContext.INSTANCE);
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74 if (rivers == null || rivers.getLength() == 0) {
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75 throw new ServerException(ERROR_NO_RIVERS_FOUND);
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76 }
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78 int count = rivers.getLength();
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79
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80 List<River> theRivers = new ArrayList<River>(count);
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81 User user = this.getUser();
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82
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83 for (int i = 0; i < count; i++) {
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84 Element tmp = (Element)rivers.item(i);
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85
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86 String name = tmp.getAttributeNS(
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87 ArtifactNamespaceContext.NAMESPACE_URI, "name");
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88
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89 if (name.length() > 0
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90 && (user == null || user.canUseFeature("river:" + name))) {
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91 theRivers.add(new DefaultRiver(name));
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92 }
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93 }
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94
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95 return theRivers.toArray(new River[theRivers.size()]);
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96 }
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97 catch (ConnectionException ce) {
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98 logger.error(ce, ce);
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99 }
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101 throw new ServerException(ERROR_NO_RIVERS_FOUND);
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102 }
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103 }
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104 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org