Outcome.java

/*
 * JBoss, Home of Professional Open Source
 * Copyright 2006, Red Hat Middleware LLC, and individual contributors
 * as indicated by the @author tags. 
 * See the copyright.txt in the distribution for a full listing 
 * of individual contributors.
 * This copyrighted material is made available to anyone wishing to use,
 * modify, copy, or redistribute it subject to the terms and conditions
 * of the GNU Lesser General Public License, v. 2.1.
 * This program is distributed in the hope that it will be useful, but WITHOUT A
 * 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,
 * v.2.1 along with this distribution; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA  02110-1301, USA.
 * 
 * (C) 2005-2006,
 * @author JBoss Inc.
 */
/*
 * Copyright (C) 2002,
 *
 * Arjuna Technologies Limited,
 * Newcastle upon Tyne,
 * Tyne and Wear,
 * UK.
 *
 * $Id: Outcome.java,v 1.2 2005/05/19 12:13:16 nmcl Exp $
 */

package com.arjuna.mw.wsas.activity;

import com.arjuna.mw.wsas.completionstatus.CompletionStatus;

import com.arjuna.mw.wsas.exceptions.SystemException;

/**
 * The Outcome represents the final outcome of the activity. Because
 * different HLS implementations will have different requirements
 * on what they can or cannot return, this interface is deliberately
 * generic.
 *
 * @author Mark Little (mark.little@arjuna.com)
 * @version $Id: Outcome.java,v 1.2 2005/05/19 12:13:16 nmcl Exp $
 * @since 1.0.
 */

public interface Outcome
{

    /**
     * Give a name for this outcome.
     *
     * @exception SystemException Thrown if an error occurs.
     * @return some implementation specific name for the Outcome. Typically
     * this will be the only thing necessary to determine the transaction's
     * outcome, e.g., "RolledBack".
     */

    public String name () throws SystemException;

    /**
     * The state in which the activity completed.
     *
     * @exception SystemException Thrown if an error occurs.
     * @return the final completion status of the transaction. Any additional
     * information (e.g., exception types) may be provided by the data method.
     */

    public CompletionStatus completedStatus () throws SystemException;
 
    /**
     * Outcome specific information that can be used to determine finer
     * level details about the outcome instance.
     *
     * @exception SystemException Thrown if an error occurs.
     * @return completion specific data for this activity. Examples include
     * the type of failure exception that was thrown by the implementation
     * (e.g., HeuristicMixed).
     */

    public Object data () throws SystemException;
    
}