org.kalypso.service.wps.server.operations.ExecuteOperation.java Source code

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Here is the source code for org.kalypso.service.wps.server.operations.ExecuteOperation.java

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/*----------------    FILE HEADER KALYPSO ------------------------------------------
 *
 *  This file is part of kalypso.
 *  Copyright (C) 2004 by:
 * 
 *  Technical University Hamburg-Harburg (TUHH)
 *  Institute of River and coastal engineering
 *  Denickestrae 22
 *  21073 Hamburg, Germany
 *  http://www.tuhh.de/wb
 * 
 *  and
 *  
 *  Bjoernsen Consulting Engineers (BCE)
 *  Maria Trost 3
 *  56070 Koblenz, Germany
 *  http://www.bjoernsen.de
 * 
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2.1 of the License, or (at your option) any later version.
 * 
 *  This library is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Lesser General Public License for more details.
 * 
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 * 
 *  Contact:
 * 
 *  E-Mail:
 *  belger@bjoernsen.de
 *  schlienger@bjoernsen.de
 *  v.doemming@tuhh.de
 *   
 *  ---------------------------------------------------------------------------*/
package org.kalypso.service.wps.server.operations;

import java.io.InputStream;

import javax.xml.bind.JAXBException;

import org.apache.commons.io.IOUtils;
import org.apache.commons.vfs2.FileContent;
import org.apache.commons.vfs2.FileObject;
import org.kalypso.commons.io.VFSUtilities;
import org.kalypso.service.ogc.RequestBean;
import org.kalypso.service.ogc.exception.OWSException;
import org.kalypso.service.wps.internal.KalypsoServiceWPSDebug;
import org.kalypso.service.wps.utils.MarshallUtilities;
import org.kalypso.service.wps.utils.ogc.ExecuteMediator;
import org.kalypso.service.wps.utils.simulation.WPSSimulationInfo;
import org.kalypso.service.wps.utils.simulation.WPSSimulationManager;

/**
 * This operation will execute a specific simulation.
 * 
 * @author Holger Albert
 */
public class ExecuteOperation implements IOperation {
    /**
     * The constructor.
     */
    public ExecuteOperation() {
    }

    /**
     * @see org.kalypso.service.wps.operations.IOperation#executeOperation(org.kalypso.service.ogc.RequestBean)
     */
    @Override
    public StringBuffer executeOperation(final RequestBean request) throws OWSException {
        final StringBuffer response = new StringBuffer();

        /* Start the operation. */
        KalypsoServiceWPSDebug.DEBUG.printf("Operation \"Execute\" started.\n"); //$NON-NLS-1$

        /* Gets the identifier, but also unmarshalls the request, so it has to be done! */
        final String requestXml = request.getBody();
        Object executeRequest = null;
        try {
            executeRequest = MarshallUtilities.unmarshall(requestXml);
        } catch (final JAXBException e) {
            throw new OWSException(OWSException.ExceptionCode.NO_APPLICABLE_CODE, e, ""); //$NON-NLS-1$
        }

        /* Execute the simulation via a manager, so that more than one simulation can be run at the same time. */
        final WPSSimulationManager manager = WPSSimulationManager.getInstance();

        // TODO version 1.0
        final ExecuteMediator executeMediator = new ExecuteMediator(executeRequest);
        final WPSSimulationInfo info = manager.startSimulation(executeMediator);

        /* Prepare the execute response. */
        FileObject resultFile = null;
        InputStream inputStream = null;
        try {
            final FileObject resultDir = manager.getResultDir(info.getId());
            resultFile = resultDir.resolveFile("executeResponse.xml"); //$NON-NLS-1$
            int time = 0;
            final int timeout = 10000;
            final int delay = 500;
            while (!resultFile.exists() && time < timeout) {
                Thread.sleep(delay);
                time += delay;
            }
            final FileContent content = resultFile.getContent();
            inputStream = content.getInputStream();
            final String responseXml = IOUtils.toString(inputStream);
            response.append(responseXml);
        } catch (final Exception e) {
            throw new OWSException(OWSException.ExceptionCode.NO_APPLICABLE_CODE, e, ""); //$NON-NLS-1$
        } finally {
            /* Close the file object. */
            VFSUtilities.closeQuietly(resultFile);

            /* Close the input stream. */
            IOUtils.closeQuietly(inputStream);
        }

        return response;
    }
}