17ba0605dc97fb81bde8311510d27b3ccba170008Ceki Gulcu/** 27ba0605dc97fb81bde8311510d27b3ccba170008Ceki Gulcu * Copyright (c) 2004-2011 QOS.ch 388c4c456766193e012eb890e2208473d99b91f83Ceki Gulcu * All rights reserved. 47ba0605dc97fb81bde8311510d27b3ccba170008Ceki Gulcu * 57ba0605dc97fb81bde8311510d27b3ccba170008Ceki Gulcu * Permission is hereby granted, free of charge, to any person obtaining 67ba0605dc97fb81bde8311510d27b3ccba170008Ceki Gulcu * a copy of this software and associated documentation files (the 788c4c456766193e012eb890e2208473d99b91f83Ceki Gulcu * "Software"), to deal in the Software without restriction, including 888c4c456766193e012eb890e2208473d99b91f83Ceki Gulcu * without limitation the rights to use, copy, modify, merge, publish, 97ba0605dc97fb81bde8311510d27b3ccba170008Ceki Gulcu * distribute, sublicense, and/or sell copies of the Software, and to 107ba0605dc97fb81bde8311510d27b3ccba170008Ceki Gulcu * permit persons to whom the Software is furnished to do so, subject to 117ba0605dc97fb81bde8311510d27b3ccba170008Ceki Gulcu * the following conditions: 127ba0605dc97fb81bde8311510d27b3ccba170008Ceki Gulcu * 137ba0605dc97fb81bde8311510d27b3ccba170008Ceki Gulcu * The above copyright notice and this permission notice shall be 147ba0605dc97fb81bde8311510d27b3ccba170008Ceki Gulcu * included in all copies or substantial portions of the Software. 157ba0605dc97fb81bde8311510d27b3ccba170008Ceki Gulcu * 1688c4c456766193e012eb890e2208473d99b91f83Ceki Gulcu * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 1788c4c456766193e012eb890e2208473d99b91f83Ceki Gulcu * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 187ba0605dc97fb81bde8311510d27b3ccba170008Ceki Gulcu * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 197ba0605dc97fb81bde8311510d27b3ccba170008Ceki Gulcu * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 207ba0605dc97fb81bde8311510d27b3ccba170008Ceki Gulcu * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 217ba0605dc97fb81bde8311510d27b3ccba170008Ceki Gulcu * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 227ba0605dc97fb81bde8311510d27b3ccba170008Ceki Gulcu * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 2388c4c456766193e012eb890e2208473d99b91f83Ceki Gulcu * 2488c4c456766193e012eb890e2208473d99b91f83Ceki Gulcu */ 2588c4c456766193e012eb890e2208473d99b91f83Ceki Gulcupackage org.slf4j.impl; 2688c4c456766193e012eb890e2208473d99b91f83Ceki Gulcu 274dc6af1af741d9419c33187033a210dd623ceff1Ceki Gulcuimport java.util.concurrent.ConcurrentHashMap; 284dc6af1af741d9419c33187033a210dd623ceff1Ceki Gulcuimport java.util.concurrent.ConcurrentMap; 2988c4c456766193e012eb890e2208473d99b91f83Ceki Gulcu 3088c4c456766193e012eb890e2208473d99b91f83Ceki Gulcuimport org.apache.commons.logging.LogFactory; 3188c4c456766193e012eb890e2208473d99b91f83Ceki Gulcuimport org.slf4j.ILoggerFactory; 3288c4c456766193e012eb890e2208473d99b91f83Ceki Gulcuimport org.slf4j.Logger; 33dae55b822906cbb5b701e6f58199e9b50c0e2df8Ceki Gulcuimport org.slf4j.helpers.Util; 3488c4c456766193e012eb890e2208473d99b91f83Ceki Gulcu 3588c4c456766193e012eb890e2208473d99b91f83Ceki Gulcu/** 3688c4c456766193e012eb890e2208473d99b91f83Ceki Gulcu * JCLLoggerFactory is an implementation of {@link ILoggerFactory} returning the 3788c4c456766193e012eb890e2208473d99b91f83Ceki Gulcu * appropriately named {@link JCLLoggerAdapter} instance. 3888c4c456766193e012eb890e2208473d99b91f83Ceki Gulcu * 3988c4c456766193e012eb890e2208473d99b91f83Ceki Gulcu * @author Ceki Gülcü 4088c4c456766193e012eb890e2208473d99b91f83Ceki Gulcu */ 4188c4c456766193e012eb890e2208473d99b91f83Ceki Gulcupublic class JCLLoggerFactory implements ILoggerFactory { 4288c4c456766193e012eb890e2208473d99b91f83Ceki Gulcu 4331212435723e2dfd5d6716d1f6a7b0e66a1e6b38Ceki Gulcu private static final String JCL_DELEGATION_LOOP_URL = "http://www.slf4j.org/codes.html#jclDelegationLoop"; 44dae55b822906cbb5b701e6f58199e9b50c0e2df8Ceki Gulcu 4531212435723e2dfd5d6716d1f6a7b0e66a1e6b38Ceki Gulcu // check for delegation loops 4631212435723e2dfd5d6716d1f6a7b0e66a1e6b38Ceki Gulcu static { 4731212435723e2dfd5d6716d1f6a7b0e66a1e6b38Ceki Gulcu try { 4831212435723e2dfd5d6716d1f6a7b0e66a1e6b38Ceki Gulcu Class.forName("org.apache.commons.logging.impl.SLF4JLogFactory"); 4931212435723e2dfd5d6716d1f6a7b0e66a1e6b38Ceki Gulcu String part1 = "Detected both jcl-over-slf4j.jar AND slf4j-jcl.jar on the class path, preempting StackOverflowError. "; 5031212435723e2dfd5d6716d1f6a7b0e66a1e6b38Ceki Gulcu String part2 = "See also " + JCL_DELEGATION_LOOP_URL + " for more details."; 51dae55b822906cbb5b701e6f58199e9b50c0e2df8Ceki Gulcu 5231212435723e2dfd5d6716d1f6a7b0e66a1e6b38Ceki Gulcu Util.report(part1); 5331212435723e2dfd5d6716d1f6a7b0e66a1e6b38Ceki Gulcu Util.report(part2); 5431212435723e2dfd5d6716d1f6a7b0e66a1e6b38Ceki Gulcu throw new IllegalStateException(part1 + part2); 5531212435723e2dfd5d6716d1f6a7b0e66a1e6b38Ceki Gulcu } catch (ClassNotFoundException e) { 5631212435723e2dfd5d6716d1f6a7b0e66a1e6b38Ceki Gulcu // this is the good case 5731212435723e2dfd5d6716d1f6a7b0e66a1e6b38Ceki Gulcu } 58dae55b822906cbb5b701e6f58199e9b50c0e2df8Ceki Gulcu } 59dae55b822906cbb5b701e6f58199e9b50c0e2df8Ceki Gulcu 6031212435723e2dfd5d6716d1f6a7b0e66a1e6b38Ceki Gulcu // key: name (String), value: a JCLLoggerAdapter; 6131212435723e2dfd5d6716d1f6a7b0e66a1e6b38Ceki Gulcu ConcurrentMap<String, Logger> loggerMap; 6288c4c456766193e012eb890e2208473d99b91f83Ceki Gulcu 6331212435723e2dfd5d6716d1f6a7b0e66a1e6b38Ceki Gulcu public JCLLoggerFactory() { 6431212435723e2dfd5d6716d1f6a7b0e66a1e6b38Ceki Gulcu loggerMap = new ConcurrentHashMap<String, Logger>(); 6531212435723e2dfd5d6716d1f6a7b0e66a1e6b38Ceki Gulcu } 6688c4c456766193e012eb890e2208473d99b91f83Ceki Gulcu 6731212435723e2dfd5d6716d1f6a7b0e66a1e6b38Ceki Gulcu /* 6831212435723e2dfd5d6716d1f6a7b0e66a1e6b38Ceki Gulcu * (non-Javadoc) 6931212435723e2dfd5d6716d1f6a7b0e66a1e6b38Ceki Gulcu * 7031212435723e2dfd5d6716d1f6a7b0e66a1e6b38Ceki Gulcu * @see org.slf4j.ILoggerFactory#getLogger(java.lang.String) 7131212435723e2dfd5d6716d1f6a7b0e66a1e6b38Ceki Gulcu */ 7231212435723e2dfd5d6716d1f6a7b0e66a1e6b38Ceki Gulcu public Logger getLogger(String name) { 7331212435723e2dfd5d6716d1f6a7b0e66a1e6b38Ceki Gulcu Logger slf4jLogger = loggerMap.get(name); 7431212435723e2dfd5d6716d1f6a7b0e66a1e6b38Ceki Gulcu if (slf4jLogger != null) { 7531212435723e2dfd5d6716d1f6a7b0e66a1e6b38Ceki Gulcu return slf4jLogger; 7631212435723e2dfd5d6716d1f6a7b0e66a1e6b38Ceki Gulcu } else { 7731212435723e2dfd5d6716d1f6a7b0e66a1e6b38Ceki Gulcu org.apache.commons.logging.Log jclLogger = LogFactory.getLog(name); 7831212435723e2dfd5d6716d1f6a7b0e66a1e6b38Ceki Gulcu Logger newInstance = new JCLLoggerAdapter(jclLogger, name); 7931212435723e2dfd5d6716d1f6a7b0e66a1e6b38Ceki Gulcu Logger oldInstance = loggerMap.putIfAbsent(name, newInstance); 8031212435723e2dfd5d6716d1f6a7b0e66a1e6b38Ceki Gulcu return oldInstance == null ? newInstance : oldInstance; 8131212435723e2dfd5d6716d1f6a7b0e66a1e6b38Ceki Gulcu } 8288c4c456766193e012eb890e2208473d99b91f83Ceki Gulcu } 8388c4c456766193e012eb890e2208473d99b91f83Ceki Gulcu} 84