MDC (Red Hat JBoss Enterprise Application Platform 8.0.0.Beta public API)

java.lang.Object
- org.jboss.logging.MDC

```
public final class MDC
extends Object
```
Mapped diagnostic context. Each log provider implementation may behave different.

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static void`	`clear()`	Clears the message diagnostics context.
`static Object`	`get(String key)`	Returns the value for the key or `null` if no value was found.
`static Map<String,Object>`	`getMap()`	Returns the map from the context.
`static Object`	`put(String key, Object val)`	Puts the value onto the context.
`static void`	`remove(String key)`	Removes the value from the context.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - put
```
public static Object put(String key,
                         Object val)
```
    Puts the value onto the context.
    
    Parameters:
    
    key - the key for the value
    
    val - the value
    
    Returns:
    
    the previous value set or null if no value was set
  - get
```
public static Object get(String key)
```
    Returns the value for the key or null if no value was found.
    
    Parameters:
    
    key - the key to lookup the value for
    
    Returns:
    
    the value or null if not found
  - remove
```
public static void remove(String key)
```
    Removes the value from the context.
    
    Parameters:
    
    key - the key of the value to remove
  - getMap
```
public static Map<String,Object> getMap()
```
    Returns the map from the context.
    Note that in most implementations this is an expensive operation and should be used sparingly.
    
    Returns:
    
    the map from the context or an empty map if the context is null
  - clear
```
public static void clear()
```
    Clears the message diagnostics context.