MDCStrLookup (SLF4J 1.7.25 API)
Date: 2017-03-16

org.slf4j.ext

## Class MDCStrLookup

- java.lang.Object
- - org.apache.commons.lang.text.StrLookup
  - - org.slf4j.ext.MDCStrLookup

-     public class MDCStrLookup
      extends org.apache.commons.lang.text.StrLookup

  This class can be used with the Commons Lang StrSubstitutor to replace tokens that occur in Strings with their values in the MDC.
  Author:
    Ralph Goers

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `MDCStrLookup()`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `String` | `lookup(String key)` Looks up up a value in the MDC.

    - ### Methods inherited from class org.apache.commons.lang.text.StrLookup

      `mapLookup, noneLookup, systemPropertiesLookup`

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### MDCStrLookup

          public MDCStrLookup()

  - ### Method Detail

    - #### lookup

          public String lookup(String key)

      Looks up up a value in the MDC.
      Specified by:
        `lookup` in class `org.apache.commons.lang.text.StrLookup`
      Parameters:
        `key` - the key to be looked up, may be null
      Returns:
        the matching value, null if no match

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