001 /******************************************************************************
002 * Copyright (C) MActor Developers. All rights reserved. *
003 * ---------------------------------------------------------------------------*
004 * This file is part of MActor. *
005 * *
006 * MActor is free software; you can redistribute it and/or modify *
007 * it under the terms of the GNU General Public License as published by *
008 * the Free Software Foundation; either version 2 of the License, or *
009 * (at your option) any later version. *
010 * *
011 * MActor is distributed in the hope that it will be useful, *
012 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
014 * GNU General Public License for more details. *
015 * *
016 * You should have received a copy of the GNU General Public License *
017 * along with MActor; if not, write to the Free Software *
018 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA *
019 ******************************************************************************/
020 package org.mactor.brokers;
021
022 /**
023 * Defines a messsage subscriber
024 *
025 * @author Lars Ivar Almli
026 */
027 public interface MessageSubscriber {
028 /**
029 * Invoked by the message broker when a message has been received (and
030 * accepted by the)
031 *
032 * @param message
033 * @return null or a response message - when dealing with synchrounous
034 * protcols (the output from the message_respond node inside the
035 * message_receive node..).
036 */
037 Message onMessage(Message message);
038 }