ingo@1022: /*
ingo@1022:  * Copyright (c) 2010 by Intevation GmbH
ingo@1022:  *
ingo@1022:  * This program is free software under the LGPL (>=v2.1)
ingo@1022:  * Read the file LGPL.txt coming with the software for details
ingo@1022:  * or visit http://www.gnu.org/licenses/ if it does not exist.
ingo@1022:  */
ingo@1022: 
ingo@569: package de.intevation.gnv.action;
ingo@569: 
ingo@569: import javax.servlet.http.HttpServletRequest;
ingo@569: import javax.servlet.http.HttpServletResponse;
ingo@569: 
ingo@569: import org.apache.log4j.Logger;
ingo@569: import org.apache.struts.action.ActionForm;
ingo@569: import org.apache.struts.action.ActionForward;
ingo@569: import org.apache.struts.action.ActionMapping;
ingo@569: 
tim@963: import de.intevation.gnv.action.sessionmodel.SessionModel;
tim@963: import de.intevation.gnv.action.sessionmodel.SessionModelFactory;
tim@963: 
ingo@569: /**
ingo@690:  * This controller is called to display histograms.<br>
ingo@690:  * An attribute 'histogram' on the request object is activated which inserts an
ingo@690:  * image calling a histogram output of the server.
ingo@690:  *
sascha@684:  * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
ingo@569:  */
ingo@569: public class CreateHistogramAction extends DescribeUIAction {
ingo@569: 
tim@963:     /**
tim@963:      * the logger, used to log exceptions and additonaly information
tim@963:      */
ingo@569:     private static Logger logger = Logger.getLogger(CreateHistogramAction.class);
ingo@569: 
ingo@569: 
tim@963:     /**
tim@963:      * Constructor
tim@963:      */
ingo@569:     public CreateHistogramAction() {
ingo@569:         super();
ingo@569:     }
ingo@569: 
ingo@569: 
ingo@569:     @Override
ingo@569:     public ActionForward execute(
ingo@569:         ActionMapping       mapping,
ingo@569:         ActionForm          form,
ingo@569:         HttpServletRequest  request,
ingo@569:         HttpServletResponse response)
ingo@569:     throws Exception {
ingo@991:         if (isSessionExhausted(request)) {
ingo@991:             return sessionExhaustedForward(mapping, form, request, response);
ingo@991:         }
ingo@991: 
ingo@569:         logger.debug("Create histogram.");
ingo@569: 
ingo@587:         SessionModel sm = SessionModelFactory.getInstance().getSessionModel(
ingo@587:             request);
ingo@587:         sm.setDiagrammOptions(null);
ingo@569:         request.setAttribute("histogram", true);
ingo@569: 
ingo@569:         return super.execute(mapping, form, request, response);
ingo@569:     }
ingo@569: }
ingo@569: // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :