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annotate flys-client/src/main/java/de/intevation/flys/client/server/GetArtifactServiceImpl.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 bc06a671ef60
children
rev   line source
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f03c34bec364 Added a new service to query an artifact description.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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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
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5 import org.apache.log4j.Logger;
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6
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7 import com.google.gwt.user.server.rpc.RemoteServiceServlet;
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8
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9 import de.intevation.artifacts.common.ArtifactNamespaceContext;
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10 import de.intevation.artifacts.common.utils.ClientProtocolUtils;
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11 import de.intevation.artifacts.common.utils.XMLUtils;
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12
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13 import de.intevation.artifacts.httpclient.exceptions.ConnectionException;
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14 import de.intevation.artifacts.httpclient.http.HttpClient;
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15 import de.intevation.artifacts.httpclient.http.HttpClientImpl;
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16 import de.intevation.artifacts.httpclient.http.response.DocumentResponseHandler;
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17
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18 import de.intevation.flys.client.shared.exceptions.ServerException;
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19 import de.intevation.flys.client.shared.model.Artifact;
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20 import de.intevation.flys.client.client.services.GetArtifactService;
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21
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22
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23 /**
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24 * This service provides a method that returns an artifact based on its
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25 * identifier.
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26 *
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27 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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28 */
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29 public class GetArtifactServiceImpl
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30 extends RemoteServiceServlet
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31 implements GetArtifactService
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32 {
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33 private static final Logger logger =
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34 Logger.getLogger(GetArtifactServiceImpl.class);
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35
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36
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37 public static final String ERROR_DESCRIBE_ARTIFACT =
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38 "error_describe_artifact";
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39
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40 public static final String XPATH_RESULT = "/art:result/text()";
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41
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42 public static final String OPERATION_FAILURE = "FAILED";
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43
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44
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45 public Artifact getArtifact(
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46 String locale,
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47 String uuid,
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48 String hash)
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49 throws ServerException
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50 {
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51 logger.info("GetArtifactServiceImpl.getArtifact");
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52
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53 String url = getServletContext().getInitParameter("server-url");
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54
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55 Document describe = ClientProtocolUtils.newDescribeDocument(
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56 uuid, hash, true);
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57
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58 HttpClient client = new HttpClientImpl(url, locale);
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59
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60 try {
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61 Document description = (Document) client.describe(
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62 new de.intevation.artifacts.httpclient.objects.Artifact(
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63 uuid, hash),
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64 describe,
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65 new DocumentResponseHandler());
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66
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67 if (description == null) {
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68 throw new ServerException(ERROR_DESCRIBE_ARTIFACT);
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69 }
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70
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71 String result = XMLUtils.xpathString(
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72 description,
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73 XPATH_RESULT,
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74 ArtifactNamespaceContext.INSTANCE);
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75
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76 if (result == null || !result.equals(OPERATION_FAILURE)) {
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77 return (Artifact) new FLYSArtifactCreator().create(description);
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78 }
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79 }
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80 catch (ConnectionException ce) {
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81 logger.error(ce, ce);
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82 }
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83
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84 throw new ServerException(ERROR_DESCRIBE_ARTIFACT);
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85 }
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86 }
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87 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org