/**
* EasyBeans
* Copyright (C) 2006 Bull S.A.S.
* Contact: easybeans@ow2.org
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*
* --------------------------------------------------------------------------
* $Id: CMTNeverTransactionInterceptor.java 5369 2010-02-24 14:58:19Z benoitf $
* --------------------------------------------------------------------------
*/
package org.ow2.easybeans.transaction.interceptors;
import javax.ejb.EJBException;
import javax.transaction.SystemException;
import javax.transaction.Transaction;
import org.ow2.easybeans.api.EasyBeansInvocationContext;
import org.ow2.util.log.Log;
import org.ow2.util.log.LogFactory;
/**
* Defines an interceptor for method using the NEVER attribute.
* @author Florent Benoit
*/
public class CMTNeverTransactionInterceptor extends AbsTransactionInterceptor {
/**
* Logger.
*/
private Log logger = LogFactory.getLog(CMTNeverTransactionInterceptor.class);
/**
* Constructor.<br>
* Acquire the transaction manager.
*/
public CMTNeverTransactionInterceptor() {
super();
}
/**
* Execute transaction as specified with the NEVER attribute.
* @param invocationContext context with useful attributes on the current
* invocation
* @return result of the next invocation (to chain interceptors)
* @throws Exception if interceptor fails
* @see <a href="http://www.jcp.org/en/jsr/detail?id=220">EJB 3.0
* specification ?12.6.2.6</a>
*/
@Override
public Object intercept(final EasyBeansInvocationContext invocationContext) throws Exception {
logger.debug("Calling Never TX interceptor");
// Get current transaction
Transaction transaction;
try {
transaction = getTransactionManager().getTransaction();
} catch (SystemException se) {
throw new EJBException("Cannot get the current transaction on transaction manager.", se);
}
logger.debug("Transaction found = {0}", transaction);
/*
* If the client calls with a transaction context, the container throws
* the javax.ejb.EJBException[ 55]. If the EJB 2.1 client view is used,
* the container throws the java.rmi.RemoteException exception if the
* client is a remote client, or the javax.ejb.EJBException if the
* client is a local client.
*/
if (transaction != null) {
logger.warn("Mandatory as transaction attribute but within a transaction.");
throw new EJBException("Client should not call within a transaction context by using NEVER mode.");
}
// else
/*
* If the client calls without a transaction context, the container
* performs the same steps as described in the NOT_SUPPORTED case.
*/
try {
return invocationContext.proceed();
} catch (Exception e) {
handleUnspecifiedTransactionContext(invocationContext, e);
// Shouldn't come here
return null;
}
}
}