    001    //$HeadURL: https://svn.wald.intevation.org/svn/deegree/base/branches/2.4_testing/src/org/deegree/ogcwebservices/wps/execute/DefaultRequestQueueManager.java $
    002    /*----------------------------------------------------------------------------
    003     This file is part of deegree, http://deegree.org/
    004     Copyright (C) 2001-2009 by:
    005       Department of Geography, University of Bonn
    006     and
    007       lat/lon GmbH
    008
    009     This library is free software; you can redistribute it and/or modify it under
    010     the terms of the GNU Lesser General Public License as published by the Free
    011     Software Foundation; either version 2.1 of the License, or (at your option)
    012     any later version.
    013     This library is distributed in the hope that it will be useful, but WITHOUT
    014     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
    015     FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
    016     details.
    017     You should have received a copy of the GNU Lesser General Public License
    018     along with this library; if not, write to the Free Software Foundation, Inc.,
    019     59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
    020
    021     Contact information:
    022
    023     lat/lon GmbH
    024     Aennchenstr. 19, 53177 Bonn
    025     Germany
    026     http://lat-lon.de/
    027
    028     Department of Geography, University of Bonn
    029     Prof. Dr. Klaus Greve
    030     Postfach 1147, 53001 Bonn
    031     Germany
    032     http://www.geographie.uni-bonn.de/deegree/
    033
    034     e-mail: info@deegree.org
    035    ----------------------------------------------------------------------------*/
    036    package org.deegree.ogcwebservices.wps.execute;
    037
    038    import java.util.LinkedList;
    039
    040    import org.deegree.framework.log.ILogger;
    041    import org.deegree.framework.log.LoggerFactory;
    042    import org.deegree.ogcwebservices.OGCWebServiceException;
    043
    044    /**
    045     * DefaultRequestQueueManager.java
    046     *
    047     * Created on 24.03.2006. 19:50:08h
    048     *
    049     * @author <a href="mailto:christian@kiehle.org">Christian Kiehle</a>
    050     * @author <a href="mailto:christian.heier@gmx.de">Christian Heier</a>
    051     *
    052     * @version 1.0.
    053     *
    054     * @since 2.0
    055     */
    056
    057    public class DefaultRequestQueueManager implements RequestQueueManager {
    058
    059            private static final ILogger LOG = LoggerFactory.getLogger( DefaultRequestQueueManager.class );
    060
    061            private LinkedList<ExecuteRequest> requestQueue = null;
    062
    063            /**
    064             *
    065             */
    066            public boolean addRequestToQueue( ExecuteRequest executeRequest ) throws OGCWebServiceException {
    067                    boolean success = false;
    068
    069                    if ( null == requestQueue ) {
    070                            requestQueue = new LinkedList<ExecuteRequest>();
    071                    }
    072
    073                    try {
    074                            requestQueue.add( executeRequest );
    075                            success = true;
    076                            LOG.logInfo( "Request successfully added to queue!" );
    077                    } catch ( Exception e ) {
    078                            LOG.logError( "Problem while saving request to queue!" );
    079                    }
    080                    return success;
    081            }
    082
    083            /**
    084             *
    085             */
    086            public ExecuteRequest getRequestFromQueue() throws OGCWebServiceException {
    087                    ExecuteRequest execRequest = null;
    088                    if ( requestQueue.size() > 0 ) {
    089                            LOG.logInfo( "SIZE vorher: " + requestQueue.size() );
    090                            execRequest = requestQueue.removeFirst();
    091                            LOG.logInfo( "SIZE nachher: " + requestQueue.size() );
    092                    }
    093                    return execRequest;
    094            }
    095
    096            /**
    097             *
    098             */
    099            public int getLengthOfQueue() throws OGCWebServiceException {
    100
    101                    int lengthOfQueue = 0;
    102
    103                    if ( null != requestQueue ) {
    104                            lengthOfQueue = requestQueue.size();
    105                    }
    106                    return lengthOfQueue;
    107            }
    108
    109    }