Mercurial > dive4elements > river
annotate flys-client/src/main/java/de/intevation/flys/client/server/RiverServiceImpl.java @ 1499:0372797fc9cf
Avoid NPE in StyleEditorWindow.
flys-client/trunk@3612 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Felix Wolfsteller <felix.wolfsteller@intevation.de> |
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date | Fri, 06 Jan 2012 11:53:14 +0000 |
parents | bc06a671ef60 |
children | 2867a0192aed |
rev | line source |
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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 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.Node; |
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11 |
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12 import org.apache.log4j.Logger; |
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14 import com.google.gwt.user.server.rpc.RemoteServiceServlet; |
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15 |
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16 import de.intevation.artifacts.common.ArtifactNamespaceContext; |
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17 import de.intevation.artifacts.common.utils.XMLUtils; |
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18 |
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19 import de.intevation.artifacts.httpclient.exceptions.ConnectionException; |
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20 import de.intevation.artifacts.httpclient.http.HttpClient; |
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21 import de.intevation.artifacts.httpclient.http.HttpClientImpl; |
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22 |
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23 import de.intevation.flys.client.shared.exceptions.ServerException; |
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24 import de.intevation.flys.client.shared.model.DefaultRiver; |
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25 import de.intevation.flys.client.shared.model.River; |
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26 import de.intevation.flys.client.client.services.RiverService; |
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27 |
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28 |
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29 /** |
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30 * This interface provides a method to list the supported rivers of the artifact |
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31 * server. |
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32 * |
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33 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> |
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34 */ |
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35 public class RiverServiceImpl |
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36 extends RemoteServiceServlet |
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37 implements RiverService |
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38 { |
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39 private static final Logger logger = |
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40 Logger.getLogger(RiverServiceImpl.class); |
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41 |
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42 |
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43 /** The XPath string that points to the rivers in the resulting document.*/ |
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44 public static final String XPATH_RIVERS = "/art:rivers/art:river"; |
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45 |
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46 /** The error message key that is thrown if an error occured while reading |
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47 * the supported rivers from server.*/ |
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48 public static final String ERROR_NO_RIVERS_FOUND = "error_no_rivers_found"; |
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49 |
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50 |
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51 public River[] list(String locale) |
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52 throws ServerException |
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53 { |
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54 String url = getServletContext().getInitParameter("server-url"); |
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55 |
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56 Document doc = XMLUtils.newDocument(); |
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57 |
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58 XMLUtils.ElementCreator ec = new XMLUtils.ElementCreator( |
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59 doc, |
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60 ArtifactNamespaceContext.NAMESPACE_URI, |
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61 ArtifactNamespaceContext.NAMESPACE_PREFIX); |
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62 |
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63 doc.appendChild(ec.create("action")); |
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64 |
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65 HttpClient client = new HttpClientImpl(url, locale); |
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66 |
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67 try { |
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68 Document res = client.callService(url, "rivers", doc); |
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69 |
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70 NodeList rivers = (NodeList) XMLUtils.xpath( |
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71 res, |
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72 XPATH_RIVERS, |
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73 XPathConstants.NODESET, |
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74 ArtifactNamespaceContext.INSTANCE); |
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75 |
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76 if (rivers == null || rivers.getLength() == 0) { |
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77 throw new ServerException(ERROR_NO_RIVERS_FOUND); |
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78 } |
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79 |
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80 int count = rivers.getLength(); |
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81 |
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82 List<River> theRivers = new ArrayList<River>(count); |
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83 |
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84 for (int i = 0; i < count; i++) { |
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85 Node tmp = rivers.item(i); |
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86 |
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87 String name = XMLUtils.xpathString( |
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88 tmp, "@art:name", ArtifactNamespaceContext.INSTANCE); |
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89 |
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90 theRivers.add(new DefaultRiver(name)); |
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91 } |
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92 |
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93 return (River[]) theRivers.toArray(new River[count]); |
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94 } |
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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>
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95 catch (ConnectionException ce) { |
1367
ab8eb2f544f2
Replaced stdout and stderr logging with log4j loggers in server classes.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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96 logger.error(ce, ce); |
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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changeset
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97 } |
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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changeset
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98 |
217
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>
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99 throw new ServerException(ERROR_NO_RIVERS_FOUND); |
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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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changeset
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100 } |
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
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101 } |
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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102 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |