1 /* 2 * Copyright (c) 2004-2005 SLF4J.ORG 3 * Copyright (c) 2004-2005 QOS.ch 4 * 5 * All rights reserved. 6 * 7 * Permission is hereby granted, free of charge, to any person obtaining 8 * a copy of this software and associated documentation files (the 9 * "Software"), to deal in the Software without restriction, including 10 * without limitation the rights to use, copy, modify, merge, publish, 11 * distribute, and/or sell copies of the Software, and to permit persons 12 * to whom the Software is furnished to do so, provided that the above 13 * copyright notice(s) and this permission notice appear in all copies of 14 * the Software and that both the above copyright notice(s) and this 15 * permission notice appear in supporting documentation. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT 20 * OF THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 21 * HOLDERS INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY 22 * SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER 23 * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF 24 * CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN 25 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 26 * 27 * Except as contained in this notice, the name of a copyright holder 28 * shall not be used in advertising or otherwise to promote the sale, use 29 * or other dealings in this Software without prior written authorization 30 * of the copyright holder. 31 * 32 */ 33 34 package org.slf4j.impl; 35 36 import java.util.HashMap; 37 import java.util.Map; 38 39 import org.slf4j.Logger; 40 import org.slf4j.ILoggerFactory; 41 42 /** 43 * An implementation of {@link ILoggerFactory} which always returns 44 * {@link SimpleLogger} instances. 45 * 46 * @author Ceki Gülcü 47 */ 48 public class SimpleLoggerFactory implements ILoggerFactory { 49 50 final static SimpleLoggerFactory INSTANCE = new SimpleLoggerFactory(); 51 52 Map loggerMap; 53 54 public SimpleLoggerFactory() { 55 loggerMap = new HashMap(); 56 } 57 58 /** 59 * Return an appropriate {@link SimpleLogger} instance by name. 60 */ 61 public Logger getLogger(String name) { 62 Logger slogger = null; 63 // protect against concurrent access of the loggerMap 64 synchronized (this) { 65 slogger = (Logger) loggerMap.get(name); 66 if (slogger == null) { 67 slogger = new SimpleLogger(name); 68 loggerMap.put(name, slogger); 69 } 70 } 71 return slogger; 72 } 73 }