org.apache.log4j.helpers.ThreadLocalMap Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.log4j.helpers;
import java.util.Hashtable;
/**
* ThreadLocalMap 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;
}
}
}