Package org.apache.log4j

Class MDC

java.lang.Object

org.apache.log4j.MDC

public final class MDC
extends Object

Thread-based mapped diagnostic context.

Method Summary

Modifier and Type	Method	Description
static void	clear()	Remove all existing mapped context values.
static Object	get(String key)	Get the context value by a key.
static Hashtable	getContext()	Get a copy of all mapped context values.
static void	put(String key, Object value)	Put a new mapped context value.
static void	remove(String key)	Remove a mapped context value if existing.

Methods inherited from class java.lang.Object

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

Method Detail

getContext

public static Hashtable getContext()

Get a copy of all mapped context values.

Returns:

Copy current mapped diagnostic context

get

public static Object get(String key)

Get the context value by a key.

Parameters:

key - Key of mapping

Returns:

Context value or null

put

public static void put(String key,
                       Object value)

Put a new mapped context value.

Parameters:

key - Key of mapping

value - New value

remove

public static void remove(String key)

Remove a mapped context value if existing.

Parameters:

key - Key of mapping

clear

public static void clear()

Remove all existing mapped context values.