| /* |
| * Copyright (C) The Apache Software Foundation. All rights reserved. |
| * |
| * This software is published under the terms of the Apache Software License |
| * version 1.1, a copy of which has been included with this distribution in |
| * the LICENSE.txt file. |
| */ |
| |
| package org.apache.log4j.helpers; |
| |
| import java.util.Hashtable; |
| |
| /** |
| <code>ThreadLocalMap</code> extends {@link InheritableThreadLocal} |
| to bequeath a copy of the hashtable of the MDC of the parent |
| thread. |
| |
| @author Ceki Gülcü |
| @since 1.2 |
| */ |
| final public class ThreadLocalMap extends InheritableThreadLocal { |
| |
| public final Object childValue(Object parentValue) { |
| Hashtable ht = (Hashtable) parentValue; |
| if(ht != null) { |
| return ht.clone(); |
| } else { |
| return null; |
| } |
| } |
| } |