RootLogger

java.lang.Object
- org.apache.log4j.Category
- - org.apache.log4j.Logger
  - - org.apache.log4j.spi.RootLogger

All Implemented Interfaces:

AppenderAttachable
```
public final class RootLogger
extends Logger
```
RootLogger sits at the top of the logger hierarchy. It is a regular logger except that it provides several guarantees.
First, it cannot be assigned a null level. Second, since root logger cannot have a parent, the getChainedLevel() method always returns the value of the level field without walking the hierarchy.

Field Summary
- Fields inherited from class org.apache.log4j.Category
  additive, bundle, level, name, parent, repository

Constructor Summary

Constructors
Constructor Description

RootLogger(Level level)
The root logger names itself as "root".

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`Level`	`getChainedLevel()`	Gets the assigned level value without walking the logger hierarchy.
`void`	`setLevel(Level level)`	Sets the log level.

Methods inherited from class org.apache.log4j.Logger
getLogger, getLogger, getLogger, getRootLogger, isTraceEnabled, trace, trace

Methods inherited from class org.apache.log4j.Category
addAppender, assertLog, callAppenders, debug, debug, error, error, exists, fatal, fatal, forcedLog, getAdditivity, getAllAppenders, getAppender, getChainedPriority, getCurrentCategories, getDefaultHierarchy, getEffectiveLevel, getHierarchy, getInstance, getInstance, getLevel, getLoggerRepository, getName, getParent, getPriority, getResourceBundle, getRoot, info, info, isAttached, isDebugEnabled, isEnabledFor, isErrorEnabled, isFatalEnabled, isInfoEnabled, isWarnEnabled, l7dlog, l7dlog, log, log, log, removeAllAppenders, removeAppender, removeAppender, setAdditivity, setPriority, setResourceBundle, shutdown, warn, warn

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

- Constructor Detail
  - RootLogger
```
public RootLogger(Level level)
```
    The root logger names itself as "root". However, the root logger cannot be retrieved by name.
- Method Detail
  - getChainedLevel
```
public final Level getChainedLevel()
```
    Gets the assigned level value without walking the logger hierarchy.
  - setLevel
```
public final void setLevel(Level level)
```
    Sets the log level. Setting a null value to the level of the root logger may have catastrophic results. We prevent this here.
    
    Overrides:
    
    setLevel in class Category
    
    Since:
    
    0.8.3