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.spring;
023
024import org.aopalliance.intercept.MethodInterceptor;
025import org.aopalliance.intercept.MethodInvocation;
026import org.granite.gravity.Gravity;
027import org.granite.tide.data.DataEnabled;
028import org.granite.tide.data.DataUpdatePostprocessor;
029import org.granite.util.ThrowableCallable;
030import org.springframework.beans.factory.InitializingBean;
031import org.springframework.beans.factory.annotation.Autowired;
032
033/**
034 * Spring AOP interceptor to handle publishing of data changes instead of relying on the default behaviour
035 * This can be used outside of a HTTP Granite context and inside the security/transaction context
036 * 
037 * Ensure that the order of the interceptor is correctly setup to use ON_COMMIT publish mode: this interceptor must be executed inside a transaction
038 *  
039 * @author William DRAI
040 */
041public class TideDataPublishingInterceptor implements MethodInterceptor, InitializingBean {
042        
043        //private static final Logger log = Logger.getLogger(TideDataPublishingInterceptor.class);
044        
045        private Gravity gravity;
046        private DataUpdatePostprocessor dataUpdatePostprocessor;
047        
048        private TideDataPublishingWrapper tideDataPublishingWrapper = null;
049
050        
051        public void setGravity(Gravity gravity) {
052                this.gravity = gravity;
053        }
054
055    public void setTideDataPublishingWrapper(TideDataPublishingWrapper tideDataPublishingWrapper) {
056        this.tideDataPublishingWrapper = tideDataPublishingWrapper;
057    }
058        
059        @Autowired(required=false)
060        public void setDataUpdatePostprocessor(DataUpdatePostprocessor dataUpdatePostprocessor) {
061                this.dataUpdatePostprocessor = dataUpdatePostprocessor;
062        }
063
064    @Override
065    public void afterPropertiesSet() throws Exception {
066        if (tideDataPublishingWrapper == null)
067            tideDataPublishingWrapper = new TideDataPublishingWrapper(gravity, dataUpdatePostprocessor);
068    }
069
070    public Object invoke(final MethodInvocation invocation) throws Throwable {
071        DataEnabled dataEnabled = invocation.getThis().getClass().getAnnotation(DataEnabled.class);
072        if (dataEnabled == null || !dataEnabled.useInterceptor())
073                return invocation.proceed();
074
075        return tideDataPublishingWrapper.execute(dataEnabled, new ThrowableCallable<Object>() {
076            @Override
077            public Object call() throws Throwable {
078                return invocation.proceed();
079            }
080        });
081    }
082}