001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements. See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache license, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License. You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the license for the specific language governing permissions and
015 * limitations under the license.
016 */
017package org.apache.logging.slf4j;
018
019import java.util.Map;
020
021import org.apache.logging.log4j.spi.ThreadContextMap;
022import org.slf4j.MDC;
023
024/**
025 * Bind the ThreadContextMap to the SLF4J MDC.
026 */
027public class MDCContextMap implements ThreadContextMap {
028    @Override
029    public void put(final String key, final String value) {
030        MDC.put(key, value);
031    }
032
033    @Override
034    public String get(final String key) {
035        return MDC.get(key);
036    }
037
038    @Override
039    public void remove(final String key) {
040        MDC.remove(key);
041    }
042
043    @Override
044    public void clear() {
045        MDC.clear();
046    }
047
048    @Override
049    public boolean containsKey(final String key) {
050        return MDC.getCopyOfContextMap().containsKey(key);
051    }
052
053    @Override
054    @SuppressWarnings("unchecked") // nothing we can do about this, restricted by SLF4J API
055    public Map<String, String> getCopy() {
056        return MDC.getCopyOfContextMap();
057    }
058
059    @Override
060    @SuppressWarnings("unchecked") // nothing we can do about this, restricted by SLF4J API
061    public Map<String, String> getImmutableMapOrNull() {
062        return MDC.getCopyOfContextMap();
063    }
064
065    @Override
066    public boolean isEmpty() {
067        return MDC.getCopyOfContextMap().isEmpty();
068    }
069}