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.jericho;
016    
017    import com.liferay.portal.kernel.util.ReflectionUtil;
018    
019    import java.lang.reflect.Method;
020    
021    import java.util.Map;
022    import java.util.concurrent.ConcurrentHashMap;
023    
024    import net.htmlparser.jericho.Config;
025    import net.htmlparser.jericho.Logger;
026    import net.htmlparser.jericho.LoggerProvider;
027    
028    /**
029     * @author Shuyang Zhou
030     */
031    public class CachedLoggerProvider implements LoggerProvider {
032    
033            public static void install() throws Exception {
034                    Class<?> clazz = Class.forName("net.htmlparser.jericho.LoggerFactory");
035    
036                    Method method = ReflectionUtil.getDeclaredMethod(
037                            clazz, "getDefaultLoggerProvider");
038    
039                    LoggerProvider loggerProvider = (LoggerProvider)method.invoke(null);
040    
041                    CachedLoggerProvider cachedLoggerProvider = new CachedLoggerProvider(
042                            loggerProvider);
043    
044                    Config.LoggerProvider = cachedLoggerProvider;
045            }
046    
047            public CachedLoggerProvider(LoggerProvider loggerProvider) {
048                    _loggerProvider = loggerProvider;
049            }
050    
051            @Override
052            public Logger getLogger(String name) {
053                    Logger logger = _loggers.get(name);
054    
055                    if (logger == null) {
056                            logger = _loggerProvider.getLogger(name);
057    
058                            _loggers.put(name, logger);
059                    }
060    
061                    return logger;
062            }
063    
064            private LoggerProvider _loggerProvider;
065            private Map<String, Logger> _loggers =
066                    new ConcurrentHashMap<String, Logger>();
067    
068    }