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 org.slf4j.Logger; 28 import org.slf4j.ILoggerFactory; 29 30 import java.util.concurrent.ConcurrentHashMap; 31 import java.util.concurrent.ConcurrentMap; 32 33 /** 34 * JDK14LoggerFactory is an implementation of {@link ILoggerFactory} returning 35 * the appropriately named {@link JDK14LoggerAdapter} instance. 36 * 37 * @author Ceki Gülcü 38 */ 39 public class JDK14LoggerFactory implements ILoggerFactory { 40 41 // key: name (String), value: a JDK14LoggerAdapter; 42 ConcurrentMap<String, Logger> loggerMap; 43 44 public JDK14LoggerFactory() { 45 loggerMap = new ConcurrentHashMap<String, Logger>(); 46 // ensure jul initialization. see SLF4J-359 47 // note that call to java.util.logging.LogManager.getLogManager() fails on the Google App Engine platform. See SLF4J-363 48 java.util.logging.Logger.getLogger(""); 49 } 50 51 /* 52 * (non-Javadoc) 53 * 54 * @see org.slf4j.ILoggerFactory#getLogger(java.lang.String) 55 */ 56 public Logger getLogger(String name) { 57 // the root logger is called "" in JUL 58 if (name.equalsIgnoreCase(Logger.ROOT_LOGGER_NAME)) { 59 name = ""; 60 } 61 62 Logger slf4jLogger = loggerMap.get(name); 63 if (slf4jLogger != null) 64 return slf4jLogger; 65 else { 66 java.util.logging.Logger julLogger = java.util.logging.Logger.getLogger(name); 67 Logger newInstance = new JDK14LoggerAdapter(julLogger); 68 Logger oldInstance = loggerMap.putIfAbsent(name, newInstance); 69 return oldInstance == null ? newInstance : oldInstance; 70 } 71 } 72 }