    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    }