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 *   Granite Data Services is free software; you can redistribute it and/or
008 *   modify it under the terms of the GNU Lesser General Public
009 *   License as published by the Free Software Foundation; either
010 *   version 2.1 of the License, or (at your option) any later version.
011 *
012 *   Granite Data Services is distributed in the hope that it will be useful,
013 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
014 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
015 *   General Public License for more details.
016 *
017 *   You should have received a copy of the GNU Lesser General Public
018 *   License along with this library; if not, write to the Free Software
019 *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
020 *   USA, or see <http://www.gnu.org/licenses/>.
021 */
022package org.granite.messaging.service;
023
024import flex.messaging.messages.RemotingMessage;
025
026import org.granite.config.flex.Destination;
027import org.granite.config.flex.DestinationRemoveListener;
028import org.granite.context.GraniteContext;
029
030import java.util.Collections;
031import java.util.HashSet;
032import java.util.Map;
033import java.util.Set;
034
035/**
036 * @author Franck WOLFF
037 */
038public class SimpleServiceFactory extends ServiceFactory implements DestinationRemoveListener {
039    
040    private Set<String> invalidKeys = new HashSet<String>();
041    
042
043    @Override
044    public ServiceInvoker<?> getServiceInstance(RemotingMessage request) throws ServiceException {
045        String messageType = request.getClass().getName();
046        String destinationId = request.getDestination();
047
048        GraniteContext context = GraniteContext.getCurrentInstance();
049        Destination destination = context.getServicesConfig().findDestinationById(messageType, destinationId);
050        if (destination == null)
051            throw new ServiceException("No matching destination: " + destinationId);
052
053        destination.addRemoveListener(this);
054        Map<String, Object> cache = getCache(destination);
055        
056        String key = SimpleServiceInvoker.class.getName() + '.' + destination.getId();
057        if (invalidKeys.contains(key)) {
058                cache.remove(key);
059                invalidKeys.remove(key);
060        }
061        
062        SimpleServiceInvoker service = (SimpleServiceInvoker)cache.get(key);
063        if (service == null) {
064            service = new SimpleServiceInvoker(destination, this);
065            cache.put(key, service);
066        }
067        return service;
068    }
069    
070    public void destinationRemoved(Destination destination) throws ServiceException {
071        synchronized (invalidKeys) {
072                invalidKeys.add(SimpleServiceInvoker.class.getName() + '.' + destination.getId());
073        }
074    }
075    
076    
077    private Map<String, Object> getCache(Destination destination) throws ServiceException {
078        GraniteContext context = GraniteContext.getCurrentInstance();
079        String scope = destination.getProperties().get("scope");
080
081        Map<String, Object> cache = null;
082        if (scope == null || "request".equals(scope))
083            cache = context.getRequestMap();
084        else if ("session".equals(scope))
085            cache = context.getSessionMap();
086        else if ("application".equals(scope))
087            cache = Collections.synchronizedMap(context.getApplicationMap());
088        else
089            throw new ServiceException("Illegal scope in destination: " + destination);
090        
091        return cache;
092    }
093}