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annotate flys-client/src/main/java/de/intevation/flys/client/server/GetArtifactServiceImpl.java @ 221:f03c34bec364

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Added a new service to query an artifact description. flys-client/trunk@1666 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Tue, 12 Apr 2011 07:56:33 +0000
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children 924da6695800
rev   line source
221
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 com.google.gwt.user.server.rpc.RemoteServiceServlet;
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6
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7 import de.intevation.artifacts.common.ArtifactNamespaceContext;
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8 import de.intevation.artifacts.common.utils.ClientProtocolUtils;
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9 import de.intevation.artifacts.common.utils.XMLUtils;
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10
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11 import de.intevation.artifacts.httpclient.exceptions.ConnectionException;
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12 import de.intevation.artifacts.httpclient.http.HttpClient;
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13 import de.intevation.artifacts.httpclient.http.HttpClientImpl;
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14 import de.intevation.artifacts.httpclient.http.response.DocumentResponseHandler;
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15
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16 import de.intevation.flys.client.shared.exceptions.ServerException;
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17 import de.intevation.flys.client.shared.model.Artifact;
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18 import de.intevation.flys.client.client.services.GetArtifactService;
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19
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20
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21 /**
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22 * This service provides a method that returns an artifact based on its
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23 * identifier.
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24 *
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25 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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26 */
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27 public class GetArtifactServiceImpl
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28 extends RemoteServiceServlet
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29 implements GetArtifactService
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30 {
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31 public static final String ERROR_DESCRIBE_ARTIFACT =
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32 "error_describe_artifact";
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33
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34 public static final String XPATH_RESULT = "/art:result/text()";
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35
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36 public static final String OPERATION_FAILURE = "FAILED";
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37
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38
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39 public Artifact getArtifact(String serverUrl, String uuid, String hash)
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40 throws ServerException
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41 {
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42 Document describe = ClientProtocolUtils.newDescribeDocument(
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43 uuid, hash, true);
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44
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45 HttpClient client = new HttpClientImpl(serverUrl);
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46
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47 try {
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48 Document description = (Document) client.describe(
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49 new de.intevation.artifacts.httpclient.objects.Artifact(
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50 uuid, hash),
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51 describe,
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52 new DocumentResponseHandler());
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53
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54 if (description == null) {
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55 throw new ServerException(ERROR_DESCRIBE_ARTIFACT);
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56 }
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57
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58 String result = XMLUtils.xpathString(
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59 description,
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60 XPATH_RESULT,
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61 ArtifactNamespaceContext.INSTANCE);
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62
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63 if (result == null || !result.equals(OPERATION_FAILURE)) {
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64 return (Artifact) new FLYSArtifactCreator().create(description);
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65 }
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66 }
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67 catch (ConnectionException ce) {
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68 System.err.println(ce.getLocalizedMessage());
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69 }
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70
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71 throw new ServerException(ERROR_DESCRIBE_ARTIFACT);
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72 }
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73 }
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74 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org