001    //$HeadURL: svn+ssh://jwilden@svn.wald.intevation.org/deegree/base/branches/2.5_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    }