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    
021    package org.granite.tide.cdi;
022    
023    import javax.enterprise.inject.Produces;
024    
025    import org.granite.context.GraniteContext;
026    import org.granite.gravity.Gravity;
027    import org.granite.gravity.GravityManager;
028    import org.granite.messaging.webapp.HttpGraniteContext;
029    
030    
031    /**
032     * TideGravity produces the Gravity instance for injection in CDI beans
033     * 
034     * @author William DRAI
035     */
036    public class TideGravity {    
037        
038        @Produces
039        public Gravity getGravity() {
040            GraniteContext graniteContext = GraniteContext.getCurrentInstance();
041            if (graniteContext == null || !(graniteContext instanceof HttpGraniteContext))
042                    throw new RuntimeException("Gravity not found: not in a GraniteDS HTTP context");
043            
044            return GravityManager.getGravity(((HttpGraniteContext)graniteContext).getServletContext());
045        }
046    }