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/***
 * OW2 FraSCAti Transaction service
 * Copyright (C) 2008-2009 INRIA, USTL
 *
 * 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 of the License, or (at your option) 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
 *
 * Contact: [email protected]
 *
 * Author: Nicolas Dolet
 */
package org.ow2.frascati.transaction.intent.handler;

import javax.transaction.Status;

import org.osoa.sca.annotations.Scope;
import org.ow2.frascati.tinfi.api.IntentJoinPoint;

@Scope("COMPOSITE")
public class ManagedTransactionGlobalIntentHandler
     extends AbstractTransactionIntentHandler {
    
    // --------------------------------------------------------------------------
    // Implementation of the IntentHandler interface
    // --------------------------------------------------------------------------

    /**
     * @see org.ow2.frascati.tinfi.control.intent.IntentHandler#invoke(IntentJoinPoint)
     */
    public Object invoke(IntentJoinPoint ijp) throws Throwable {
        /**
         * If there is no active transaction, an invocation on this intent will:
         *  1) begin a transaction
         *  2) delegate the invocation to the intent jointpoint
         *  3) commit the transaction if no error occurs, else rollback
         */
        if (transactionManager.getStatus() == Status.STATUS_NO_TRANSACTION) {
            transactionManager.begin();
            Object ret = null;
            try {
                ret = ijp.proceed();
            } catch (Throwable t) {
                transactionManager.rollback();
                throw t;
            }
            transactionManager.commit();
            return ret;
        } else {
            return ijp.proceed();
        }
    }
}