OptimisticLockExceptionHandler.java

/**
 *   GRANITE DATA SERVICES
 *   Copyright (C) 2006-2015 GRANITE DATA SERVICES S.A.S.
 *
 *   This file is part of the Granite Data Services Platform.
 *
 *                               ***
 *
 *   Community License: GPL 3.0
 *
 *   This file is free software: you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published
 *   by the Free Software Foundation, either version 3 of the License,
 *   or (at your option) any later version.
 *
 *   This file 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 General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program. If not, see <http://www.gnu.org/licenses/>.
 *
 *                               ***
 *
 *   Available Commercial License: GraniteDS SLA 1.0
 *
 *   This is the appropriate option if you are creating proprietary
 *   applications and you are not prepared to distribute and share the
 *   source code of your application under the GPL v3 license.
 *
 *   Please visit http://www.granitedataservices.com/license for more
 *   details.
 */
package org.granite.client.tide.data;

import org.granite.client.messaging.messages.responses.FaultMessage;
import org.granite.client.messaging.messages.responses.FaultMessage.Code;
import org.granite.client.tide.Context;
import org.granite.client.tide.server.ExceptionHandler;
import org.granite.client.tide.server.TideFaultEvent;
import org.granite.logging.Logger;

/**
 * @author William DRAI
 */
public class OptimisticLockExceptionHandler implements ExceptionHandler {
      
	private static Logger log = Logger.getLogger("org.granite.tide.data.OptimisticLockExceptionHandler");
  

	@Override
	public boolean accepts(FaultMessage emsg) {
		return emsg.getCode().equals(Code.OPTIMISTIC_LOCK);
	}

	@Override
	public void handle(Context context, FaultMessage emsg, TideFaultEvent faultEvent) {
		log.debug("optimistic lock error received %s", emsg.toString());
		
		String receivedSessionId = faultEvent.getServerSession().getSessionId() + "_error";
		Object entity = (emsg.getExtended() != null && emsg.getExtended().get("entity") != null) ? emsg.getExtended().get("entity") : null;
  
		// Received entity should be the correct version from the database
        if (entity != null)
        	context.getEntityManager().mergeExternalData(faultEvent.getServerSession(), entity, null, receivedSessionId, null, null);
      }
  }