001    /**
002     * Copyright (c) 2000-2013 Liferay, Inc. All rights reserved.
003     *
004     * The contents of this file are subject to the terms of the Liferay Enterprise
005     * Subscription License ("License"). You may not use this file except in
006     * compliance with the License. You can obtain a copy of the License by
007     * contacting Liferay, Inc. See the License for the specific language governing
008     * permissions and limitations under the License, including but not limited to
009     * distribution rights of the Software.
010     *
011     *
012     *
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.repository.model.FileVersion;
022    
023    /**
024     * @author Alexander Chow
025     */
026    public abstract class BaseProcessorMessageListener extends BaseMessageListener {
027    
028            @Override
029            protected void doReceive(Message message) throws Exception {
030                    Object[] array = (Object[])message.getPayload();
031    
032                    FileVersion sourceFileVersion = (FileVersion)array[0];
033                    FileVersion destinationFileVersion = (FileVersion)array[1];
034    
035                    try {
036                            generate(sourceFileVersion, destinationFileVersion);
037                    }
038                    catch (Exception e) {
039                            if (_log.isWarnEnabled()) {
040                                    _log.warn(
041                                            "Unable to process file version " +
042                                                    destinationFileVersion.getFileVersionId(),
043                                            e);
044                            }
045                    }
046            }
047    
048            protected abstract void generate(
049                            FileVersion sourceFileVersion, FileVersion destinationFileVersion)
050                    throws Exception;
051    
052            private static Log _log = LogFactoryUtil.getLog(
053                    BaseProcessorMessageListener.class);
054    
055    }