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.guice;
022
023import javax.servlet.ServletContext;
024
025import org.granite.config.flex.Destination;
026import org.granite.context.GraniteContext;
027import org.granite.messaging.service.ServiceException;
028import org.granite.messaging.service.ServiceInvoker;
029import org.granite.messaging.service.SimpleServiceFactory;
030import org.granite.messaging.webapp.HttpGraniteContext;
031import org.granite.util.XMap;
032
033import com.google.inject.Injector;
034
035import flex.messaging.messages.RemotingMessage;
036
037/**
038 * @author Matt GIACOMI
039 */
040public class GuiceServiceFactory extends SimpleServiceFactory {
041
042    private Injector injector = null;
043
044    @Override
045    public void configure(XMap properties)throws ServiceException {
046        super.configure(properties);
047
048        // getting guice injector from container
049        GraniteContext context = GraniteContext.getCurrentInstance();
050        ServletContext sc = ((HttpGraniteContext)context).getServletContext();
051        injector = (Injector) sc.getAttribute(Injector.class.getName());
052    }
053
054    @Override
055    public ServiceInvoker<?> getServiceInstance(RemotingMessage request) throws ServiceException {
056        String messageType = request.getClass().getName();
057        String destinationId = request.getDestination();
058
059        GraniteContext context = GraniteContext.getCurrentInstance();
060        Destination destination = context.getServicesConfig().findDestinationById(messageType, destinationId);
061        if (destination == null)
062            throw new ServiceException("No matching destination: " + destinationId);
063
064        String className = destination.getProperties().get("source");
065
066        try {
067            Class<?> gclass = Class.forName(className, true, getClass().getClassLoader());
068            Object gobject = injector.getInstance(gclass);
069            return new GuiceServiceInvoker(destination, this, gobject);
070        }
071        catch(Exception e) {
072            throw new ServiceException("Class not found in classloader: "+ className, e);
073        }
074    }
075
076    @Override
077    public String toString() {
078        return toString("\n  Guice Injector: " + injector);
079    }
080}