Mercurial > dive4elements > gnv-client

annotate gnv/src/main/java/de/intevation/gnv/action/PreviousArtifactStepAction.java @ 1022:28a0628b11b0

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Added license file and license header. gnv/trunk@1258 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Tue, 02 Nov 2010 17:15:08 +0000
parents 33198e55371c
children
rev   line source
1022
28a0628b11b0 Added license file and license header.
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1 /*
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2 * Copyright (c) 2010 by Intevation GmbH
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3 *
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4 * This program is free software under the LGPL (>=v2.1)
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5 * Read the file LGPL.txt coming with the software for details
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6 * or visit http://www.gnu.org/licenses/ if it does not exist.
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7 */
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8
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9 package de.intevation.gnv.action;
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10
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11 import javax.servlet.http.HttpServletRequest;
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12 import javax.servlet.http.HttpServletResponse;
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13
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14 import org.apache.log4j.Logger;
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15 import org.apache.struts.action.ActionForm;
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16 import org.apache.struts.action.ActionForward;
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17 import org.apache.struts.action.ActionMapping;
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18
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19 import de.intevation.gnv.action.sessionmodel.SessionModel;
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20 import de.intevation.gnv.action.sessionmodel.SessionModelFactory;
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21 import de.intevation.gnv.artifactdatabase.client.ArtifactDatabaseClient;
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22 import de.intevation.gnv.artifactdatabase.client.ArtifactDatabaseClientFactory;
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23 import de.intevation.gnv.artifactdatabase.objects.ArtifactDescription;
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24 import de.intevation.gnv.artifactdatabase.objects.ArtifactObject;
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25
394
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26 /**
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27 * This controller is used to step back to a previous state of the current
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28 * artifact. After calling the advance operation of the artifact server have
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29 * been called successfully, the describe document of the current artifact is
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30 * fetched and a new gui is rendered.
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31 *
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32 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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33 */
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34 public class PreviousArtifactStepAction extends DescribeUIAction {
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35
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36
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37 public static final String URL_STATE_KEY = "target";
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38
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39 /**
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40 * the logger, used to log exceptions and additonaly information
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41 */
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42 private static Logger logger =
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43 Logger.getLogger(PreviousArtifactStepAction.class);
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44
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45
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46 /**
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47 * Constructor
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48 */
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49 public PreviousArtifactStepAction() {
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50 super();
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51 }
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52
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53
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54 @Override
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55 public ActionForward execute(
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56 ActionMapping mapping,
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57 ActionForm form,
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58 HttpServletRequest request,
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59 HttpServletResponse response
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60 ) throws Exception {
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61
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62 SessionModel session = SessionModelFactory.getInstance().getSessionModel(
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63 request);
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64
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65 ArtifactDescription ad = session.getArtifactDescription();
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66 if (ad == null) {
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67 logger.warn("Session timed out.");
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68 request.setAttribute(
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69 CommunicationKeys.REQUEST_EXCEPTION_SESSION_ID,
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70 "SessionTimeout has occured");
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71 return new FetchArtifactFactoriesAction().execute(
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72 mapping, form, request, response);
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73 }
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74
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75 // TODO check if target is reachable
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76
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77 ArtifactDatabaseClientFactory f =
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78 ArtifactDatabaseClientFactory.getInstance();
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79 ArtifactDatabaseClient client =
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80 f.getArtifactDatabaseClient(getLocale(request));
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81
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82 ArtifactObject artifactFactory = session.getSelectedArtifactFactory();
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83 ArtifactObject currentArtifact = session.getCurrentArtifact();
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84
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85 String target = (String) request.getParameter(URL_STATE_KEY);
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86 logger.debug("Step back to previous state: " + target);
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87
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88 try {
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89 client.doAdvance(
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90 artifactFactory,
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91 currentArtifact,
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92 target
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93 );
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94 }
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95 catch (Exception e) {
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96 logger.error(e, e);
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97 request.setAttribute(
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98 CommunicationKeys.REQUEST_EXCEPTION_MESSAGE_ID,
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99 e.getMessage());
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100 }
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101
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102 return super.execute(mapping, form, request, response);
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103 }
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104 }
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105 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org