Mercurial > dive4elements > river

annotate flys-client/src/main/java/de/intevation/flys/client/server/MetaDataServiceImpl.java @ 4278:efc731efa4a3

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Documentation added.
author Felix Wolfsteller <felix.wolfsteller@intevation.de>
date Fri, 26 Oct 2012 16:42:51 +0200
parents f2039d030b5e
children 2dac0e5b927e
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 org.w3c.dom.Document;
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4 import org.w3c.dom.Element;
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5
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6 import org.apache.log4j.Logger;
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8 import com.google.gwt.user.server.rpc.RemoteServiceServlet;
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10 import de.intevation.artifacts.common.ArtifactNamespaceContext;
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11
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12 import de.intevation.artifacts.common.utils.XMLUtils;
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13
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14 import de.intevation.flys.client.shared.exceptions.ServerException;
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15
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16 import de.intevation.flys.client.client.services.MetaDataService;
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18 import de.intevation.artifacts.httpclient.exceptions.ConnectionException;
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19
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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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23 import de.intevation.flys.client.shared.model.DataCageTree;
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25 import de.intevation.flys.client.server.meta.Converter;
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26
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27 /**
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28 * Service that returns certain meta-data from the backends data, polished to
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29 * inclusion into current project.
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30 */
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31 public class MetaDataServiceImpl
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32 extends RemoteServiceServlet
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33 implements MetaDataService
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34 {
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35 /** Our very own logger. */
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36 private static final Logger logger =
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37 Logger.getLogger(MetaDataServiceImpl.class);
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39 public static final String ERROR_NO_META_DATA_FOUND =
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40 "error_no_meta_data_found";
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41
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42
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43 /**
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44 * @param locale needed for i18n.
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45 * @param artifactId ID of masterartifact (can be null)
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46 * @param userId can be null
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47 * @param outs can be null
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48 * @param parameters can be null
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49 */
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50 @Override
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51 public DataCageTree getMetaData(
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52 String locale,
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53 String artifactId,
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54 String userId,
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55 String outs,
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56 String parameters
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57 ) throws ServerException
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58 {
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59 logger.info("MetaDataService.getMetaData");
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60
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61 // Create the query document.
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62 String url = getServletContext().getInitParameter("server-url");
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63
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64 Document doc = XMLUtils.newDocument();
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65
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66 XMLUtils.ElementCreator ec = new XMLUtils.ElementCreator(
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67 doc,
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68 ArtifactNamespaceContext.NAMESPACE_URI,
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69 ArtifactNamespaceContext.NAMESPACE_PREFIX);
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70
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71 Element meta = ec.create("meta");
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72
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73 if (artifactId != null) {
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74 Element artifactEl = ec.create("artifact-id");
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75 artifactEl.setAttribute("value", artifactId);
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76 meta.appendChild(artifactEl);
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77 }
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78
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79 if (userId != null) {
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80 Element userEl = ec.create("user-id");
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81 userEl.setAttribute("value", userId);
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82 meta.appendChild(userEl);
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83 }
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84
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85 if (outs != null) {
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86 Element outsEl = ec.create("outs");
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87 outsEl.setAttribute("value", outs);
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88 meta.appendChild(outsEl);
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89 }
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90
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91 if (parameters != null) {
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92 Element paramsEl = ec.create("parameters");
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93 paramsEl.setAttribute("value", parameters);
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94 meta.appendChild(paramsEl);
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95 }
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96
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97 doc.appendChild(meta);
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98
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99 // Fire.
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100 HttpClient client = new HttpClientImpl(url, locale);
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101
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102 try {
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103 Converter converter = new Converter();
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104 return converter.convert(client.callService(url, "metadata", doc));
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105 }
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106 catch (ConnectionException ce) {
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107 ce.printStackTrace();
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108 }
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109
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110 throw new ServerException(ERROR_NO_META_DATA_FOUND);
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111 }
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112 }
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113 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org