Mercurial > dive4elements > river

annotate flys-client/src/main/java/de/intevation/flys/client/server/RiverServiceImpl.java @ 3497:88feb3347aa5

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Implement a ProxyServlet Implement a ProxyServlet to be able to restrict the access to the mapserver too. All queries to the provided map services should go throught this new ProxyServlet. Currently the ProxyServlet can only handle HTTP GET requests. flys-client/trunk@5221 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Bjoern Ricks <bjoern.ricks@intevation.de>
date Thu, 16 Aug 2012 14:42:36 +0000
parents f1814efec714
children 98fac4872ae6
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.List;
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5
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6 import javax.xml.xpath.XPathConstants;
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7
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8 import org.w3c.dom.Document;
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9 import org.w3c.dom.NodeList;
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10 import org.w3c.dom.Element;
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12 import org.apache.log4j.Logger;
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15 import de.intevation.artifacts.common.ArtifactNamespaceContext;
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16 import de.intevation.artifacts.common.utils.XMLUtils;
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18 import de.intevation.artifacts.httpclient.exceptions.ConnectionException;
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19 import de.intevation.artifacts.httpclient.http.HttpClient;
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20 import de.intevation.artifacts.httpclient.http.HttpClientImpl;
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22 import de.intevation.flys.client.shared.exceptions.ServerException;
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23 import de.intevation.flys.client.shared.model.DefaultRiver;
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24 import de.intevation.flys.client.shared.model.River;
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25 import de.intevation.flys.client.client.services.RiverService;
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27 import de.intevation.flys.client.server.auth.User;
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30 /**
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31 * This interface provides a method to list the supported rivers of the artifact
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32 * server.
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33 *
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34 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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35 */
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36 public class RiverServiceImpl
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37 extends RemoteServiceServlet
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38 implements RiverService
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39 {
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40 /** Private logger. */
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41 private static final Logger logger =
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42 Logger.getLogger(RiverServiceImpl.class);
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43
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44 /** The XPath string that points to the rivers in the resulting document.*/
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45 public static final String XPATH_RIVERS = "/art:rivers/art:river";
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47 /** The error message key that is thrown if an error occured while reading
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48 * the supported rivers from server.*/
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49 public static final String ERROR_NO_RIVERS_FOUND = "error_no_rivers_found";
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52 /** Get river list. */
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53 @Override
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54 public River[] list(String locale)
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55 throws ServerException
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56 {
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57 String url = getServletContext().getInitParameter("server-url");
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58
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59 Document doc = XMLUtils.newDocument();
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61 XMLUtils.ElementCreator ec = new XMLUtils.ElementCreator(
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62 doc,
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63 ArtifactNamespaceContext.NAMESPACE_URI,
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64 ArtifactNamespaceContext.NAMESPACE_PREFIX);
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65
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66 doc.appendChild(ec.create("action"));
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67
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68 HttpClient client = new HttpClientImpl(url, locale);
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70 try {
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71 Document res = client.callService(url, "rivers", doc);
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73 NodeList rivers = (NodeList) XMLUtils.xpath(
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74 res,
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75 XPATH_RIVERS,
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76 XPathConstants.NODESET,
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77 ArtifactNamespaceContext.INSTANCE);
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78
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79 if (rivers == null || rivers.getLength() == 0) {
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80 throw new ServerException(ERROR_NO_RIVERS_FOUND);
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81 }
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82
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83 int count = rivers.getLength();
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84
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85 List<River> theRivers = new ArrayList<River>(count);
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86 User user = this.getUser();
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87
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88 for (int i = 0; i < count; i++) {
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89 Element tmp = (Element)rivers.item(i);
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90
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91 String name = tmp.getAttributeNS(
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92 ArtifactNamespaceContext.NAMESPACE_URI, "name");
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93
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94 if (name.length() > 0
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95 && (user == null || user.canUseFeature("river:" + name))) {
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96 theRivers.add(new DefaultRiver(name));
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97 }
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98 }
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99
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100 return theRivers.toArray(new River[theRivers.size()]);
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101 }
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102 catch (ConnectionException ce) {
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103 logger.error(ce, ce);
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104 }
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907b61e4d702 Improved the exception handling - added warnings for user authentication errors and errors that occur while fetching supported rivers.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 29
diff changeset
106 throw new ServerException(ERROR_NO_RIVERS_FOUND);
29
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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107 }
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:
diff changeset
108 }
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:
diff changeset
109 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org