001    /**
002     * Copyright (c) 2000-2011 Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.portal.kernel.messaging;
016    
017    import com.liferay.portal.kernel.log.Log;
018    import com.liferay.portal.kernel.log.LogFactoryUtil;
019    import com.liferay.portal.kernel.messaging.sender.MessageSender;
020    import com.liferay.portal.kernel.messaging.sender.SingleDestinationMessageSender;
021    
022    /**
023     * @author Michael C. Han
024     */
025    public abstract class BaseMessageListener implements MessageListener {
026    
027            public BaseMessageListener() {
028            }
029    
030            /**
031             * @deprecated
032             */
033            public BaseMessageListener(
034                    SingleDestinationMessageSender statusSender,
035                    MessageSender responseSender) {
036    
037                    _statusSender = statusSender;
038                    _responseSender = responseSender;
039            }
040    
041            public void receive(Message message) {
042                    MessageStatus messageStatus = new MessageStatus();
043    
044                    messageStatus.startTimer();
045    
046                    try {
047                            doReceive(message, messageStatus);
048                    }
049                    catch (Exception e) {
050                            _log.error(
051                                    "Unable to process request " + message.getDestinationName(), e);
052    
053                            messageStatus.setException(e);
054                    }
055                    finally {
056                            messageStatus.stopTimer();
057    
058                            _statusSender.send(messageStatus);
059                    }
060            }
061    
062            public void setResponseSender(MessageSender responseSender) {
063                    _responseSender = responseSender;
064            }
065    
066            public void setStatusSender(SingleDestinationMessageSender statusSender) {
067                    _statusSender = statusSender;
068            }
069    
070            protected abstract void doReceive(
071                            Message message, MessageStatus messageStatus)
072                    throws Exception;
073    
074            protected MessageSender getResponseSender() {
075                    return _responseSender;
076            }
077    
078            private static Log _log = LogFactoryUtil.getLog(BaseMessageListener.class);
079    
080            private MessageSender _responseSender;
081            private SingleDestinationMessageSender _statusSender;
082    
083    }