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 /* 
  * Copyright (c) 2004-2007 QOS.ch
  * All rights reserved.
  * 
  * Permission is hereby granted, free  of charge, to any person obtaining
  * a  copy  of this  software  and  associated  documentation files  (the
  * "Software"), to  deal in  the Software without  restriction, including
  * without limitation  the rights to  use, copy, modify,  merge, publish,
  * distribute,  sublicense, and/or sell  copies of  the Software,  and to
 * permit persons to whom the Software  is furnished to do so, subject to
 * the following conditions:
 * 
 * The  above  copyright  notice  and  this permission  notice  shall  be
 * included in all copies or substantial portions of the Software.
 * 
 * THE  SOFTWARE IS  PROVIDED  "AS  IS", WITHOUT  WARRANTY  OF ANY  KIND,
 * EXPRESS OR  IMPLIED, INCLUDING  BUT NOT LIMITED  TO THE  WARRANTIES OF
 * MERCHANTABILITY,    FITNESS    FOR    A   PARTICULAR    PURPOSE    AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE,  ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
package org.slf4j.spi;
This interface abstracts the service offered by various MDC implementations.

Author(s):
Ceki Gülcü
Since:
1.4.1
public interface MDCAdapter {

  
Put a context value (the val parameter) as identified with the key parameter into the current thread's context map. The key parameter cannot be null. The code>val parameter can be null only if the underlying implementation supports it.

If the current thread does not have a context map it is created as a side effect of this call.

  public void put(String keyString val);

  
Get the context identified by the key parameter. The key parameter cannot be null.

Returns:
the string value identified by the key parameter.
  public String get(String key);

  
Remove the the context identified by the key parameter. The key parameter cannot be null.

This method does nothing if there is no previous value associated with key.

  public void remove(String key);

  
Clear all entries in the MDC.
  public void clear();

  
Return a copy of the current thread's context map, with keys and values of type String. Returned value may be null.

Returns:
A copy of the current thread's context map. May be null.
Since:
1.5.1
  public Map getCopyOfContextMap();
  
  
Set the current thread's context map by first clearing any existing map and then copying the map passed as parameter. The context map parameter must only contain keys and values of type String.

Parameters:
contextMap must contain only keys and values of type String
Since:
1.5.1
  public void setContextMap(Map contextMap);
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