    001/*
    002 * Copyright 2001-2004 The Apache Software Foundation.
    003 *
    004 * Licensed under the Apache License, Version 2.0 (the "License");
    005 * you may not use this file except in compliance with the License.
    006 * You may obtain a copy of the License at
    007 *
    008 *      http://www.apache.org/licenses/LICENSE-2.0
    009 *
    010 * Unless required by applicable law or agreed to in writing, software
    011 * distributed under the License is distributed on an "AS IS" BASIS,
    012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    013 * See the License for the specific language governing permissions and
    014 * limitations under the License.
    015 */
    016
    017package org.apache.log4j;
    018
    019import java.util.Hashtable;
    020import java.util.Map;
    021
    022public class MDC {
    023
    024    public static void put(String key, String value) {
    025        org.slf4j.MDC.put(key, value);
    026    }
    027
    028    public static void put(String key, Object value) {
    029        if (value != null) {
    030            put(key, value.toString());
    031        } else {
    032            put(key, null);
    033        }
    034    }
    035
    036    public static Object get(String key) {
    037        return org.slf4j.MDC.get(key);
    038    }
    039
    040    public static void remove(String key) {
    041        org.slf4j.MDC.remove(key);
    042    }
    043
    044    public static void clear() {
    045        org.slf4j.MDC.clear();
    046    }
    047
    048    /**
    049     * This method is not part of the Log4J public API. However it
    050     * has been called by other projects. This method is here temporarily
    051     * until projects who are depending on this method release fixes.
    052     */
    053    @SuppressWarnings({ "rawtypes", "unchecked" })
    054    @Deprecated
    055    public static Hashtable getContext() {
    056        Map map = org.slf4j.MDC.getCopyOfContextMap();
    057
    058        if (map != null) {
    059            return new Hashtable(map);
    060        } else {
    061            return new Hashtable();
    062        }
    063    }
    064}