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.mail.util;
016    
017    import com.liferay.portal.kernel.log.Log;
018    import com.liferay.portal.kernel.log.LogFactoryUtil;
019    import com.liferay.portal.kernel.util.ClassUtil;
020    import com.liferay.portal.kernel.util.InstanceFactory;
021    import com.liferay.portal.util.ClassLoaderUtil;
022    import com.liferay.portal.util.PropsValues;
023    
024    /**
025     * @author Brian Wing Shun Chan
026     * @author Shuyang Zhou
027     */
028    public class HookFactory {
029    
030            public static Hook getInstance() {
031                    return _hook;
032            }
033    
034            public static void setInstance(Hook hook) {
035                    if (_log.isDebugEnabled()) {
036                            _log.debug("Set " + ClassUtil.getClassName(hook));
037                    }
038    
039                    if (hook == null) {
040                            _hook = _originalHook;
041                    }
042                    else {
043                            _hook = hook;
044                    }
045            }
046    
047            public void afterPropertiesSet() throws Exception {
048                    if (_log.isDebugEnabled()) {
049                            _log.debug("Instantiate " + PropsValues.MAIL_HOOK_IMPL);
050                    }
051    
052                    ClassLoader classLoader = ClassLoaderUtil.getPortalClassLoader();
053    
054                    _originalHook = (Hook)InstanceFactory.newInstance(
055                            classLoader, PropsValues.MAIL_HOOK_IMPL);
056    
057                    _hook = _originalHook;
058            }
059    
060            private static Log _log = LogFactoryUtil.getLog(HookFactory.class);
061    
062            private static volatile Hook _hook;
063            private static Hook _originalHook;
064    
065    }