1 /** 2 * Copyright (c) 2004-2011 QOS.ch 3 * All rights reserved. 4 * 5 * Permission is hereby granted, free of charge, to any person obtaining 6 * a copy of this software and associated documentation files (the 7 * "Software"), to deal in the Software without restriction, including 8 * without limitation the rights to use, copy, modify, merge, publish, 9 * distribute, sublicense, and/or sell copies of the Software, and to 10 * permit persons to whom the Software is furnished to do so, subject to 11 * the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be 14 * included in all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 17 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 19 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 20 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 21 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 22 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 23 * 24 */ 25 package org.slf4j.impl; 26 27 import java.util.HashMap; 28 import java.util.Map; 29 import java.util.concurrent.ConcurrentHashMap; 30 import java.util.concurrent.ConcurrentMap; 31 32 import org.slf4j.Logger; 33 import org.slf4j.ILoggerFactory; 34 35 /** 36 * An implementation of {@link ILoggerFactory} which always returns 37 * {@link SimpleLogger} instances. 38 * 39 * @author Ceki Gülcü 40 */ 41 public class SimpleLoggerFactory implements ILoggerFactory { 42 43 ConcurrentMap<String, Logger> loggerMap; 44 45 public SimpleLoggerFactory() { 46 loggerMap = new ConcurrentHashMap<String, Logger>(); 47 } 48 49 /** 50 * Return an appropriate {@link SimpleLogger} instance by name. 51 */ 52 public Logger getLogger(String name) { 53 Logger simpleLogger = loggerMap.get(name); 54 if (simpleLogger != null) { 55 return simpleLogger; 56 } else { 57 Logger newInstance = new SimpleLogger(name); 58 Logger oldInstance = loggerMap.putIfAbsent(name, newInstance); 59 return oldInstance == null ? newInstance : oldInstance; 60 } 61 } 62 63 /** 64 * Clear the internal logger cache. 65 * 66 * This method is intended to be called by classes (in the same package) for 67 * testing purposes. This method is internal. It can be modified, renamed or 68 * removed at any time without notice. 69 * 70 * You are strongly discouraged from calling this method in production code. 71 */ 72 void reset() { 73 loggerMap.clear(); 74 } 75 }