/*
* Demoiselle Framework
* Copyright (C) 2010 SERPRO
* ----------------------------------------------------------------------------
* This file is part of Demoiselle Framework.
*
* Demoiselle Framework is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License version 3
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License version 3
* along with this program; if not, see <http://www.gnu.org/licenses/>
* or write to the Free Software Foundation, Inc., 51 Franklin Street,
* Fifth Floor, Boston, MA 02110-1301, USA.
* ----------------------------------------------------------------------------
* Este arquivo é parte do Framework Demoiselle.
*
* O Framework Demoiselle é um software livre; você pode redistribuí-lo e/ou
* modificá-lo dentro dos termos da GNU LGPL versão 3 como publicada pela Fundação
* do Software Livre (FSF).
*
* Este programa é distribuído na esperança que possa ser útil, mas SEM NENHUMA
* GARANTIA; sem uma garantia implícita de ADEQUAÇÃO a qualquer MERCADO ou
* APLICAÇÃO EM PARTICULAR. Veja a Licença Pública Geral GNU/LGPL em português
* para maiores detalhes.
*
* Você deve ter recebido uma cópia da GNU LGPL versão 3, sob o título
* "LICENCA.txt", junto com esse programa. Se não, acesse <http://www.gnu.org/licenses/>
* ou escreva para a Fundação do Software Livre (FSF) Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02111-1301, USA.
*/
package br.gov.frameworkdemoiselle.transaction;
import java.io.Serializable;
import javax.enterprise.context.ContextNotActiveException;
import javax.enterprise.context.RequestScoped;
import javax.enterprise.inject.Any;
import javax.interceptor.AroundInvoke;
import javax.interceptor.Interceptor;
import javax.interceptor.InvocationContext;
import org.slf4j.Logger;
import br.gov.frameworkdemoiselle.exception.ApplicationException;
import br.gov.frameworkdemoiselle.util.Beans;
import br.gov.frameworkdemoiselle.util.NameQualifier;
import br.gov.frameworkdemoiselle.util.ResourceBundle;
@Interceptor
@Transactional
public class TransactionalInterceptor implements Serializable {
private static final long serialVersionUID = 1L;
private TransactionContext transactionContext;
private TransactionInfo transactionInfo;
private static transient ResourceBundle bundle;
private static transient Logger logger;
private TransactionContext getTransactionContext() {
if (this.transactionContext == null) {
this.transactionContext = Beans.getReference(TransactionContext.class);
}
return this.transactionContext;
}
private TransactionInfo newTransactionInfo() {
TransactionInfo instance;
try {
instance = Beans.getReference(TransactionInfo.class);
instance.getCounter();
} catch (ContextNotActiveException cause) {
instance = new VoidTransactionInfo();
}
return instance;
}
private TransactionInfo getTransactionInfo() {
if (this.transactionInfo == null) {
this.transactionInfo = newTransactionInfo();
}
return this.transactionInfo;
}
@AroundInvoke
public Object manage(final InvocationContext ic) throws Exception {
initiate();
Object result = null;
try {
getLogger().debug(getBundle().getString("transactional-execution", ic.getMethod().toGenericString()));
result = ic.proceed();
} catch (Exception cause) {
handleException(cause);
throw cause;
} finally {
complete();
}
return result;
}
private void initiate() {
Transaction transaction = getTransactionContext().getCurrentTransaction();
if (!transaction.isActive()) {
transaction.begin();
getTransactionInfo().markAsOwner();
getLogger().info(getBundle().getString("begin-transaction"));
}
getTransactionInfo().incrementCounter();
}
private void handleException(final Exception cause) {
Transaction transaction = getTransactionContext().getCurrentTransaction();
if (!transaction.isMarkedRollback()) {
boolean rollback = false;
ApplicationException annotation = cause.getClass().getAnnotation(ApplicationException.class);
if (annotation == null || annotation.rollback()) {
rollback = true;
}
if (rollback) {
transaction.setRollbackOnly();
getLogger().info(getBundle().getString("transaction-marked-rollback", cause.getMessage()));
}
}
}
private void complete() {
Transaction transaction = getTransactionContext().getCurrentTransaction();
getTransactionInfo().decrementCounter();
if (getTransactionInfo().getCounter() == 0 && transaction.isActive()) {
if (getTransactionInfo().isOwner()) {
if (transaction.isMarkedRollback()) {
transaction.rollback();
getTransactionInfo().clear();
getLogger().info(getBundle().getString("transaction-rolledback"));
} else {
transaction.commit();
getTransactionInfo().clear();
getLogger().info(getBundle().getString("transaction-commited"));
}
}
} else if (getTransactionInfo().getCounter() == 0 && !transaction.isActive()) {
getLogger().info(getBundle().getString("transaction-already-finalized"));
}
}
private static ResourceBundle getBundle() {
if (bundle == null) {
bundle = Beans.getReference(ResourceBundle.class, new NameQualifier("demoiselle-core-bundle"));
}
return bundle;
}
private static Logger getLogger() {
if (logger == null) {
logger = Beans.getReference(Logger.class, new NameQualifier(TransactionalInterceptor.class.getName()));
}
return logger;
}
@RequestScoped
static class TransactionInfo implements Serializable {
private static final long serialVersionUID = 1L;
private int counter = 0;
private boolean owner;
public TransactionInfo() {
clear();
}
public void clear() {
this.owner = false;
this.counter = 0;
}
public int getCounter() {
return counter;
}
public void incrementCounter() {
this.counter++;
}
public void decrementCounter() {
this.counter--;
}
public void markAsOwner() {
this.owner = true;
}
public boolean isOwner() {
return owner;
}
}
@Any
static class VoidTransactionInfo extends TransactionInfo {
private static final long serialVersionUID = 1L;
@Override
public boolean isOwner() {
return false;
}
}
}