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     */
022    package org.granite.tide.cdi;
023    
024    import java.io.Serializable;
025    
026    import javax.enterprise.context.ContextNotActiveException;
027    import javax.enterprise.event.Observes;
028    import javax.enterprise.event.Reception;
029    import javax.enterprise.inject.Any;
030    import javax.enterprise.inject.spi.Bean;
031    import javax.enterprise.inject.spi.BeanManager;
032    import javax.inject.Inject;
033    
034    
035    /**
036     * TideEvents override to intercept CDI events handling
037     * 
038     * @author William DRAI
039     */
040    public 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    }