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    1   /*
    2    * Copyright 2001-2004 The Apache Software Foundation.
    3    *
    4    * Licensed under the Apache License, Version 2.0 (the "License");
    5    * you may not use this file except in compliance with the License.
    6    * You may obtain a copy of the License at
    7    *
    8    *      http://www.apache.org/licenses/LICENSE-2.0
    9    *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS,
    12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13   * See the License for the specific language governing permissions and
    14   * limitations under the License.
    15   */
    16
    17  package org.apache.log4j;
    18
    19  import java.util.Hashtable;
    20  import java.util.Map;
    21
    22  public class MDC {
    23
    24      public static void put(String key, String value) {
    25          org.slf4j.MDC.put(key, value);
    26      }
    27
    28      public static void put(String key, Object value) {
    29          if (value != null) {
    30              put(key, value.toString());
    31          } else {
    32              put(key, null);
    33          }
    34      }
    35
    36      public static Object get(String key) {
    37          return org.slf4j.MDC.get(key);
    38      }
    39
    40      public static void remove(String key) {
    41          org.slf4j.MDC.remove(key);
    42      }
    43
    44      public static void clear() {
    45          org.slf4j.MDC.clear();
    46      }
    47
    48      /**
    49       * This method is not part of the Log4J public API. However it
    50       * has been called by other projects. This method is here temporarily
    51       * until projects who are depending on this method release fixes.
    52       */
    53      @SuppressWarnings({ "rawtypes", "unchecked" })
    54      @Deprecated
    55      public static Hashtable getContext() {
    56          Map map = org.slf4j.MDC.getCopyOfContextMap();
    57
    58          if (map != null) {
    59              return new Hashtable(map);
    60          } else {
    61              return new Hashtable();
    62          }
    63      }
    64  }