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.jul; 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 /** 45 * the root logger is called "" in JUL 46 */ 47 private static String JUL_ROOT_LOGGER_NAME = ""; 48 49 public JDK14LoggerFactory() { 50 loggerMap = new ConcurrentHashMap<>(); 51 // ensure jul initialization. see SLF4J-359 52 // note that call to java.util.logging.LogManager.getLogManager() fails on the Google App Engine platform. See 53 // SLF4J-363 54 java.util.logging.Logger.getLogger(""); 55 } 56 57 /* 58 * (non-Javadoc) 59 * 60 * @see org.slf4j.ILoggerFactory#getLogger(java.lang.String) 61 */ 62 public Logger getLogger(String name) { 63 // the root logger is called "" in JUL 64 if (name.equalsIgnoreCase(Logger.ROOT_LOGGER_NAME)) { 65 name = JUL_ROOT_LOGGER_NAME; 66 } 67 68 Logger slf4jLogger = loggerMap.get(name); 69 if (slf4jLogger != null) 70 return slf4jLogger; 71 else { 72 java.util.logging.Logger julLogger = java.util.logging.Logger.getLogger(name); 73 Logger newInstance = new JDK14LoggerAdapter(julLogger); 74 Logger oldInstance = loggerMap.putIfAbsent(name, newInstance); 75 return oldInstance == null ? newInstance : oldInstance; 76 } 77 } 78 }