001/*
002  GRANITE DATA SERVICES
003  Copyright (C) 2011 GRANITE DATA SERVICES S.A.S.
004
005  This file is part of Granite Data Services.
006
007  Granite Data Services is free software; you can redistribute it and/or modify
008  it under the terms of the GNU Library General Public License as published by
009  the Free Software Foundation; either version 2 of the License, or (at your
010  option) any later version.
011
012  Granite Data Services is distributed in the hope that it will be useful, but
013  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
014  FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License
015  for more details.
016
017  You should have received a copy of the GNU Library General Public License
018  along with this library; if not, see <http://www.gnu.org/licenses/>.
019*/
020
021package org.granite.messaging.service;
022
023import flex.messaging.messages.RemotingMessage;
024
025import org.granite.config.flex.Destination;
026import org.granite.config.flex.DestinationRemoveListener;
027import org.granite.context.GraniteContext;
028
029import java.util.Collections;
030import java.util.HashSet;
031import java.util.Map;
032import java.util.Set;
033
034/**
035 * @author Franck WOLFF
036 */
037public class SimpleServiceFactory extends ServiceFactory implements DestinationRemoveListener {
038    
039    private Set<String> invalidKeys = new HashSet<String>();
040    
041
042    @Override
043    public ServiceInvoker<?> getServiceInstance(RemotingMessage request) throws ServiceException {
044        String messageType = request.getClass().getName();
045        String destinationId = request.getDestination();
046
047        GraniteContext context = GraniteContext.getCurrentInstance();
048        Destination destination = context.getServicesConfig().findDestinationById(messageType, destinationId);
049        if (destination == null)
050            throw new ServiceException("No matching destination: " + destinationId);
051
052        destination.addRemoveListener(this);
053        Map<String, Object> cache = getCache(destination);
054        
055        String key = SimpleServiceInvoker.class.getName() + '.' + destination.getId();
056        if (invalidKeys.contains(key)) {
057                cache.remove(key);
058                invalidKeys.remove(key);
059        }
060        
061        SimpleServiceInvoker service = (SimpleServiceInvoker)cache.get(key);
062        if (service == null) {
063            service = new SimpleServiceInvoker(destination, this);
064            cache.put(key, service);
065        }
066        return service;
067    }
068    
069    public void destinationRemoved(Destination destination) throws ServiceException {
070        synchronized (invalidKeys) {
071                invalidKeys.add(SimpleServiceInvoker.class.getName() + '.' + destination.getId());
072        }
073    }
074    
075    
076    private Map<String, Object> getCache(Destination destination) throws ServiceException {
077        GraniteContext context = GraniteContext.getCurrentInstance();
078        String scope = destination.getProperties().get("scope");
079
080        Map<String, Object> cache = null;
081        if (scope == null || "request".equals(scope))
082            cache = context.getRequestMap();
083        else if ("session".equals(scope))
084            cache = context.getSessionMap();
085        else if ("application".equals(scope))
086            cache = Collections.synchronizedMap(context.getApplicationMap());
087        else
088            throw new ServiceException("Illegal scope in destination: " + destination);
089        
090        return cache;
091    }
092}