org.apache.log4j.MDC 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;
import java.util.HashMap;
import java.util.Hashtable;
import java.util.Map;
import org.apache.logging.log4j.ThreadContext;
/**
* This class behaves just like Log4j's MDC would - and so can cause issues with the redeployment of web
* applications if the Objects stored in the threads Map cannot be garbage collected.
*/
public final class MDC {
private static ThreadLocal> localMap =
new InheritableThreadLocal>() {
@Override
protected Map initialValue() {
return new HashMap<>();
}
@Override
protected Map childValue(final Map parentValue) {
return parentValue == null ? new HashMap<>() : new HashMap<>(parentValue);
}
};
private MDC() {
}
public static void put(final String key, final String value) {
localMap.get().put(key, value);
ThreadContext.put(key, value);
}
public static void put(final String key, final Object value) {
localMap.get().put(key, value);
ThreadContext.put(key, value.toString());
}
public static Object get(final String key) {
return localMap.get().get(key);
}
public static void remove(final String key) {
localMap.get().remove(key);
ThreadContext.remove(key);
}
public static void clear() {
localMap.get().clear();
ThreadContext.clearMap();
}
public static Hashtable getContext() {
return new Hashtable<>(localMap.get());
}
}