com.fr.third.apache.log4j

类 MDC

java.lang.Object

com.fr.third.apache.log4j.MDC

public class MDC
extends java.lang.Object

The MDC class is similar to the NDC class except that it is based on a map instead of a stack. It provides mapped diagnostic contexts. A Mapped Diagnostic Context, or MDC in short, is an instrument for distinguishing interleaved log output from different sources. Log output is typically interleaved when a server handles multiple clients near-simultaneously.

The MDC is managed on a per thread basis. A child thread automatically inherits a copy of the mapped diagnostic context of its parent.

The MDC class requires JDK 1.2 or above. Under JDK 1.1 the MDC will always return empty values but otherwise will not affect or harm your application.

从以下版本开始:

1.2

作者:

Ceki Gülcü

方法概要

方法

限定符和类型	方法和说明
static void	clear() Remove all values from the MDC.
static java.lang.Object	get(java.lang.String key) Get the context identified by the key parameter.
static java.util.Hashtable	getContext() Get the current thread's MDC as a hashtable.
static void	put(java.lang.String key, java.lang.Object o) Put a context value (the o parameter) as identified with the key parameter into the current thread's context map.
static void	remove(java.lang.String key) Remove the the context identified by the key parameter.

从类继承的方法 java.lang.Object

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

方法详细资料

put

public static void put(java.lang.String key,
       java.lang.Object o)

Put a context value (the o parameter) as identified with the key parameter into the current thread's context map.

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

get

public static java.lang.Object get(java.lang.String key)

Get the context identified by the key parameter.

This method has no side effects.

remove

public static void remove(java.lang.String key)

Remove the the context identified by the key parameter.

getContext

public static java.util.Hashtable getContext()

Get the current thread's MDC as a hashtable. This method is intended to be used internally.

clear

public static void clear()

Remove all values from the MDC.

从以下版本开始:

1.2.16