ch.qos.logback.classic.util.CopyOnInheritThreadLocal Maven / Gradle / Ivy
/**
* Logback: the reliable, generic, fast and flexible logging framework.
* Copyright (C) 1999-2015, QOS.ch. All rights reserved.
*
* This program and the accompanying materials are dual-licensed under
* either the terms of the Eclipse Public License v1.0 as published by
* the Eclipse Foundation
*
* or (per the licensee's choosing)
*
* under the terms of the GNU Lesser General Public License version 2.1
* as published by the Free Software Foundation.
*/
package ch.qos.logback.classic.util;
import java.util.HashMap;
/**
* This class extends InheritableThreadLocal so that children threads get a copy
* of the parent's hashmap.
*
* @author Ceki Gülcü
*/
public class CopyOnInheritThreadLocal extends InheritableThreadLocal> {
/**
* Child threads should get a copy of the parent's hashmap.
*/
@Override
protected HashMap childValue(HashMap parentValue) {
if (parentValue == null) {
return null;
} else {
return new HashMap(parentValue);
}
}
}