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 30 import org.slf4j.Logger; 31 import org.slf4j.ILoggerFactory; 32 33 /** 34 * An implementation of {@link ILoggerFactory} which always returns 35 * {@link SimpleLogger} instances. 36 * 37 * @author Ceki Gülcü 38 */ 39 public class SimpleLoggerFactory implements ILoggerFactory { 40 41 final static SimpleLoggerFactory INSTANCE = new SimpleLoggerFactory(); 42 43 Map loggerMap; 44 45 public SimpleLoggerFactory() { 46 loggerMap = new HashMap(); 47 } 48 49 /** 50 * Return an appropriate {@link SimpleLogger} instance by name. 51 */ 52 public Logger getLogger(String name) { 53 Logger slogger = null; 54 // protect against concurrent access of the loggerMap 55 synchronized (this) { 56 slogger = (Logger) loggerMap.get(name); 57 if (slogger == null) { 58 slogger = new SimpleLogger(name); 59 loggerMap.put(name, slogger); 60 } 61 } 62 return slogger; 63 } 64 }