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.helpers; 26 27 import java.util.ArrayList; 28 import java.util.List; 29 30 import org.slf4j.ILoggerFactory; 31 import org.slf4j.Logger; 32 33 /** 34 * SubstituteLoggerFactory is an trivial implementation of 35 * {@link ILoggerFactory} which always returns the unique instance of NOPLogger. 36 * 37 * <p> 38 * It used as a temporary substitute for the real ILoggerFactory during its 39 * auto-configuration which may re-enter LoggerFactory to obtain logger 40 * instances. See also http://bugzilla.slf4j.org/show_bug.cgi?id=106 41 * 42 * @author Ceki Gülcü 43 */ 44 public class SubstituteLoggerFactory implements ILoggerFactory { 45 46 // keep a record of requested logger names 47 final List loggerNameList = new ArrayList(); 48 49 public Logger getLogger(String name) { 50 synchronized (loggerNameList) { 51 loggerNameList.add(name); 52 } 53 return NOPLogger.NOP_LOGGER; 54 } 55 56 public List getLoggerNameList() { 57 List copy = new ArrayList(); 58 synchronized (loggerNameList) { 59 copy.addAll(loggerNameList); 60 } 61 return copy; 62 } 63 64 }