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     */
017    package org.apache.logging.slf4j;
018    
019    import java.util.Map;
020    
021    import org.apache.logging.log4j.spi.ThreadContextMap;
022    import org.slf4j.MDC;
023    
024    /**
025     * Bind the ThreadContextMap to the SLF4J MDC.
026     */
027    public 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    }