001    /**
002     * Copyright (c) 2000-2013 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.portlet.documentlibrary.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.BaseMessageListener;
020    import com.liferay.portal.kernel.messaging.Message;
021    import com.liferay.portal.kernel.messaging.MessageBusUtil;
022    import com.liferay.portal.kernel.repository.model.FileVersion;
023    import com.liferay.portal.util.PropsValues;
024    
025    /**
026     * @author Alexander Chow
027     */
028    public abstract class BaseProcessorMessageListener extends BaseMessageListener {
029    
030            @Override
031            protected void doReceive(Message message) throws Exception {
032                    Object[] array = (Object[])message.getPayload();
033    
034                    FileVersion sourceFileVersion = (FileVersion)array[0];
035                    FileVersion destinationFileVersion = (FileVersion)array[1];
036    
037                    try {
038                            generate(sourceFileVersion, destinationFileVersion);
039                    }
040                    catch (Exception e) {
041                            if (_log.isWarnEnabled()) {
042                                    _log.warn(
043                                            "Unable to process file version " +
044                                                    destinationFileVersion.getFileVersionId(),
045                                            e);
046                            }
047                    }
048    
049                    if (PropsValues.DL_FILE_ENTRY_PROCESSORS_TRIGGER_SYNCHRONOUSLY) {
050                            MessageBusUtil.sendMessage(
051                                    message.getResponseDestinationName(), message);
052                    }
053            }
054    
055            protected abstract void generate(
056                            FileVersion sourceFileVersion, FileVersion destinationFileVersion)
057                    throws Exception;
058    
059            private static Log _log = LogFactoryUtil.getLog(
060                    BaseProcessorMessageListener.class);
061    
062    }