001/**
002 *   GRANITE DATA SERVICES
003 *   Copyright (C) 2006-2013 GRANITE DATA SERVICES S.A.S.
004 *
005 *   This file is part of the Granite Data Services Platform.
006 *
007 *                               ***
008 *
009 *   Community License: GPL 3.0
010 *
011 *   This file is free software: you can redistribute it and/or modify
012 *   it under the terms of the GNU General Public License as published
013 *   by the Free Software Foundation, either version 3 of the License,
014 *   or (at your option) any later version.
015 *
016 *   This file is distributed in the hope that it will be useful, but
017 *   WITHOUT ANY WARRANTY; without even the implied warranty of
018 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
019 *   GNU General Public License for more details.
020 *
021 *   You should have received a copy of the GNU General Public License
022 *   along with this program. If not, see <http://www.gnu.org/licenses/>.
023 *
024 *                               ***
025 *
026 *   Available Commercial License: GraniteDS SLA 1.0
027 *
028 *   This is the appropriate option if you are creating proprietary
029 *   applications and you are not prepared to distribute and share the
030 *   source code of your application under the GPL v3 license.
031 *
032 *   Please visit http://www.granitedataservices.com/license for more
033 *   details.
034 */
035package org.granite.client.tide.data;
036
037import org.granite.client.messaging.messages.responses.FaultMessage;
038import org.granite.client.messaging.messages.responses.FaultMessage.Code;
039import org.granite.client.tide.Context;
040import org.granite.client.tide.server.ExceptionHandler;
041import org.granite.client.tide.server.TideFaultEvent;
042import org.granite.logging.Logger;
043
044/**
045 * @author William DRAI
046 */
047public class OptimisticLockExceptionHandler implements ExceptionHandler {
048      
049        private static Logger log = Logger.getLogger("org.granite.tide.data.OptimisticLockExceptionHandler");
050  
051
052        @Override
053        public boolean accepts(FaultMessage emsg) {
054                return emsg.getCode().equals(Code.OPTIMISTIC_LOCK);
055        }
056
057        @Override
058        public void handle(Context context, FaultMessage emsg, TideFaultEvent faultEvent) {
059                log.debug("optimistic lock error received %s", emsg.toString());
060                
061                String receivedSessionId = faultEvent.getServerSession().getSessionId() + "_error";
062                Object entity = (emsg.getExtended() != null && emsg.getExtended().get("entity") != null) ? emsg.getExtended().get("entity") : null;
063  
064                // Received entity should be the correct version from the database
065        if (entity != null)
066                context.getEntityManager().mergeExternalData(faultEvent.getServerSession(), entity, null, receivedSessionId, null, null);
067      }
068  }