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.seam;
023
024 import org.granite.gravity.Gravity;
025 import org.granite.tide.data.DataContext;
026 import org.granite.tide.data.DataEnabled;
027 import org.granite.tide.data.DataUpdatePostprocessor;
028 import org.granite.tide.data.DataEnabled.PublishMode;
029 import org.jboss.seam.Component;
030 import org.jboss.seam.annotations.intercept.AroundInvoke;
031 import org.jboss.seam.annotations.intercept.Interceptor;
032 import org.jboss.seam.core.Events;
033 import org.jboss.seam.intercept.AbstractInterceptor;
034 import org.jboss.seam.intercept.InvocationContext;
035 import org.jboss.seam.transaction.TransactionInterceptor;
036
037
038 /**
039 * Seam interceptor to handle publishing of data changes instead of relying on the default behaviour
040 * This can be used outside of a HTTP Granite context and inside the security/transaction context
041 * @author William DRAI
042 *
043 */
044 @Interceptor(stateless=true, within={TransactionInterceptor.class})
045 public class TideDataPublishingInterceptor extends AbstractInterceptor {
046
047 private static final long serialVersionUID = 1L;
048
049 @AroundInvoke
050 public Object aroundInvoke(InvocationContext invocationContext) throws Exception {
051 DataEnabled dataEnabled = getComponent().getBeanClass().getAnnotation(DataEnabled.class);
052
053 if (dataEnabled == null || !dataEnabled.useInterceptor())
054 return invocationContext.proceed();
055
056 if (SeamUtils.isLifecycleMethod(getComponent(), invocationContext.getMethod()))
057 return invocationContext.proceed();
058
059 boolean shouldRemoveContextAtEnd = DataContext.get() == null;
060 boolean shouldInitContext = shouldRemoveContextAtEnd || DataContext.isNull();
061 boolean onCommit = false;
062
063 if (shouldInitContext) {
064 Gravity gravity = (Gravity)Component.getInstance("org.granite.seam.gravity");
065 DataContext.init(gravity, dataEnabled.topic(), dataEnabled.params(), dataEnabled.publish());
066
067 DataUpdatePostprocessor dataUpdatePostprocessor = (DataUpdatePostprocessor)Component.getInstance("org.granite.tide.seam.data.dataUpdatePreprocessor", true);
068 if (dataUpdatePostprocessor != null)
069 DataContext.get().setDataUpdatePostprocessor(dataUpdatePostprocessor);
070 }
071
072 DataContext.observe();
073 try {
074 if (dataEnabled.publish().equals(PublishMode.ON_COMMIT)) {
075 Events.instance().raiseTransactionSuccessEvent("org.granite.tide.seam.data.transactionSuccess", shouldRemoveContextAtEnd);
076 Events.instance().raiseTransactionCompletionEvent("org.granite.tide.seam.data.transactionCompletion", shouldRemoveContextAtEnd);
077 onCommit = true;
078 }
079
080 Object ret = invocationContext.proceed();
081
082 DataContext.publish(PublishMode.ON_SUCCESS);
083 return ret;
084 }
085 finally {
086 if (shouldRemoveContextAtEnd && !onCommit)
087 DataContext.remove();
088 }
089 }
090
091 // Needed for Seam 2.1
092 public boolean isInterceptorEnabled() {
093 return getComponent().beanClassHasAnnotation(DataEnabled.class) && getComponent().getBeanClass().getAnnotation(DataEnabled.class).useInterceptor();
094 }
095 }