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.tide.cdi;
023
024import java.io.Serializable;
025
026import javax.enterprise.context.ContextNotActiveException;
027import javax.enterprise.event.Observes;
028import javax.enterprise.event.Reception;
029import javax.enterprise.inject.Any;
030import javax.enterprise.inject.spi.Bean;
031import javax.enterprise.inject.spi.BeanManager;
032import javax.inject.Inject;
033
034
035/**
036 * TideEvents override to intercept CDI events handling
037 * 
038 * @author William DRAI
039 */
040public class TideEvents implements Serializable {
041    
042        private static final long serialVersionUID = 1L;
043
044        @Inject
045    private BeanManager manager;
046    
047    private boolean reentrant = false;
048    
049    
050    public void processEvent(@Observes(notifyObserver=Reception.ALWAYS) @Any Object event) {
051        if (reentrant || TideInvocation.get() == null) {
052                // Ignore events outside of the current bean invocation
053                return;
054        }
055        
056        try {
057                reentrant = true;
058                // Cannot inject service context as this observer is called very early before the full app initialization
059                @SuppressWarnings("unchecked")
060                Bean<CDIServiceContext> scBean = (Bean<CDIServiceContext>)manager.getBeans(CDIServiceContext.class).iterator().next();
061                CDIServiceContext serviceContext = (CDIServiceContext)manager.getReference(scBean, CDIServiceContext.class, manager.createCreationalContext(scBean));
062                if (serviceContext != null)
063                        serviceContext.processEvent(event);
064        }
065        catch (ContextNotActiveException e) {
066                // Ignore event, no session context
067        }
068        finally {
069                reentrant = false;
070        }
071    }
072}