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 javax.enterprise.event.Observes;
025import javax.enterprise.event.TransactionPhase;
026import javax.enterprise.inject.Instance;
027import javax.transaction.Status;
028import javax.transaction.SystemException;
029import javax.transaction.UserTransaction;
030
031import org.granite.logging.Logger;
032import org.granite.tide.data.DataContext;
033import org.granite.tide.data.DataEnabled.PublishMode;
034
035
036/**
037 * CDI event listener to handle publishing of data changes instead of relying on the default behaviour
038 * This can be used outside of a HTTP Granite context and inside the security/transaction context
039 * @author William DRAI
040 *
041 */
042public class TideDataPublishingOnSuccessHandler {
043        
044        private static final Logger log = Logger.getLogger(TideDataPublishingOnSuccessHandler.class);
045        
046    public void doPublish(@Observes(during=TransactionPhase.BEFORE_COMPLETION) TideDataPublishingEvent event, Instance<UserTransaction> uts) {
047        if (uts.isUnsatisfied() || uts.isAmbiguous()) {
048            // No JTA UserTransaction, probably a servlet container
049            // Anyway we should not be here
050            return;
051        }
052
053        UserTransaction ut = uts.get();        
054        try {
055                        if (!(ut.getStatus() == Status.STATUS_MARKED_ROLLBACK || ut.getStatus() == Status.STATUS_ROLLING_BACK || ut.getStatus() == Status.STATUS_ROLLING_BACK))
056                                DataContext.publish(PublishMode.ON_COMMIT);
057                } 
058        catch (SystemException e) {
059                log.warn(e, "Could not get the current status of the transaction ???");
060                }
061        if (event.getInitContext())
062                DataContext.remove();
063    }
064}