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.portal.kernel.cluster;
016    
017    import com.liferay.portal.kernel.log.Log;
018    import com.liferay.portal.kernel.log.LogFactoryUtil;
019    
020    /**
021     * @author Michael C. Han
022     */
023    public abstract class BaseClusterMasterTokenTransitionListener
024            implements ClusterMasterTokenTransitionListener {
025    
026            @Override
027            public void masterTokenAcquired() {
028                    try {
029                            doMasterTokenAcquired();
030                    }
031                    catch (Exception e) {
032                            if (_log.isWarnEnabled()) {
033                                    _log.warn("Unable to process the token acquired event", e);
034                            }
035                    }
036            }
037    
038            @Override
039            public void masterTokenReleased() {
040                    try {
041                            doMasterTokenReleased();
042                    }
043                    catch (Exception e) {
044                            if (_log.isWarnEnabled()) {
045                                    _log.warn("Unable to process the token released event", e);
046                            }
047                    }
048            }
049    
050            protected abstract void doMasterTokenAcquired() throws Exception;
051    
052            protected abstract void doMasterTokenReleased() throws Exception;
053    
054            private static Log _log = LogFactoryUtil.getLog(
055                    BaseClusterMasterTokenTransitionListener.class);
056    
057    }