java.lang.Object
- org.springframework.boot.logging.LoggingSystem
- - org.springframework.boot.logging.AbstractLoggingSystem
  - - org.springframework.boot.logging.Slf4JLoggingSystem
    - - org.springframework.boot.logging.log4j2.Log4J2LoggingSystem

public class Log4J2LoggingSystem
extends Slf4JLoggingSystem

LoggingSystem for Log4j 2.

Since:: 1.2.0

Nested Class Summary
- Nested classes/interfaces inherited from class org.springframework.boot.logging.AbstractLoggingSystem
  AbstractLoggingSystem.LogLevels<T>

Field Summary
- Fields inherited from class org.springframework.boot.logging.AbstractLoggingSystem
  CONFIGURATION_COMPARATOR
- Fields inherited from class org.springframework.boot.logging.LoggingSystem
  NONE, ROOT_LOGGER_NAME, SYSTEM_PROPERTY

Constructor Summary
Constructors
Constructor Description
Log4J2LoggingSystem(ClassLoader classLoader)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`beforeInitialize()`	Reset the logging system to be limit output.
`void`	`cleanUp()`	Clean up the logging system.
`LoggerConfiguration`	`getLoggerConfiguration(String loggerName)`	Returns the current configuration for a `LoggingSystem`'s logger.
`List<LoggerConfiguration>`	`getLoggerConfigurations()`	Returns a collection of the current configuration for all a `LoggingSystem`'s loggers.
`Runnable`	`getShutdownHandler()`	Returns a `Runnable` that can handle shutdown of this logging system when the JVM exits.
`protected String[]`	`getStandardConfigLocations()`	Return the standard config locations for this system.
`Set<LogLevel>`	`getSupportedLogLevels()`	Returns a set of the `LogLevels` that are actually supported by the logging system.
`void`	`initialize(LoggingInitializationContext initializationContext, String configLocation, LogFile logFile)`	Fully initialize the logging system.
`protected boolean`	`isClassAvailable(String className)`
`protected void`	`loadConfiguration(String location, LogFile logFile)`
`protected void`	`loadConfiguration(LoggingInitializationContext initializationContext, String location, LogFile logFile)`	Load a specific configuration.
`protected void`	`loadDefaults(LoggingInitializationContext initializationContext, LogFile logFile)`	Load sensible defaults for the logging system.
`protected void`	`reinitialize(LoggingInitializationContext initializationContext)`	Reinitialize the logging system if required.
`void`	`setLogLevel(String loggerName, LogLevel logLevel)`	Sets the logging level for a given logger.

Methods inherited from class org.springframework.boot.logging.Slf4JLoggingSystem
isBridgeHandlerAvailable, isBridgeJulIntoSlf4j

Methods inherited from class org.springframework.boot.logging.AbstractLoggingSystem
applySystemProperties, getClassLoader, getPackagedConfigFile, getSelfInitializationConfig, getSpringConfigLocations, getSpringInitializationConfig

Methods inherited from class org.springframework.boot.logging.LoggingSystem
get

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

- Constructor Detail
  - Log4J2LoggingSystem
```
public Log4J2LoggingSystem(ClassLoader classLoader)
```
- Method Detail
  - getStandardConfigLocations
```
protected String[] getStandardConfigLocations()
```
    Description copied from class: AbstractLoggingSystem
    Return the standard config locations for this system.
    Specified by:
    getStandardConfigLocations in class AbstractLoggingSystem
    Returns:
    the standard config locations
    See Also:
    AbstractLoggingSystem.getSelfInitializationConfig()
  - isClassAvailable
```
protected boolean isClassAvailable(String className)
```
  - beforeInitialize
```
public void beforeInitialize()
```
    Description copied from class: LoggingSystem
    Reset the logging system to be limit output. This method may be called before LoggingSystem.initialize(LoggingInitializationContext, String, LogFile) to reduce logging noise until the system has been fully initialized.
    Overrides:
    beforeInitialize in class Slf4JLoggingSystem
  - initialize
```
public void initialize(LoggingInitializationContext initializationContext,
                       String configLocation,
                       LogFile logFile)
```
    Description copied from class: LoggingSystem
    Fully initialize the logging system.
    Overrides:
    initialize in class AbstractLoggingSystem
    Parameters:
    initializationContext - the logging initialization context
    configLocation - a log configuration location or null if default initialization is required
    logFile - the log output file that should be written or null for console only output
  - loadDefaults
```
protected void loadDefaults(LoggingInitializationContext initializationContext,
                            LogFile logFile)
```
    Description copied from class: AbstractLoggingSystem
    Load sensible defaults for the logging system.
    Specified by:
    loadDefaults in class AbstractLoggingSystem
    Parameters:
    initializationContext - the logging initialization context
    logFile - the file to load or null if no log file is to be written
  - loadConfiguration
```
protected void loadConfiguration(LoggingInitializationContext initializationContext,
                                 String location,
                                 LogFile logFile)
```
    Description copied from class: AbstractLoggingSystem
    Load a specific configuration.
    Overrides:
    loadConfiguration in class Slf4JLoggingSystem
    Parameters:
    initializationContext - the logging initialization context
    location - the location of the configuration to load (never null)
    logFile - the file to load or null if no log file is to be written
  - loadConfiguration
```
protected void loadConfiguration(String location,
                                 LogFile logFile)
```
  - reinitialize
```
protected void reinitialize(LoggingInitializationContext initializationContext)
```
    Description copied from class: AbstractLoggingSystem
    Reinitialize the logging system if required. Called when AbstractLoggingSystem.getSelfInitializationConfig() is used and the log file hasn't changed. May be used to reload configuration (for example to pick up additional System properties).
    Overrides:
    reinitialize in class AbstractLoggingSystem
    Parameters:
    initializationContext - the logging initialization context
  - getSupportedLogLevels
```
public Set<LogLevel> getSupportedLogLevels()
```
    Description copied from class: LoggingSystem
    Returns a set of the LogLevels that are actually supported by the logging system.
    Overrides:
    getSupportedLogLevels in class LoggingSystem
    Returns:
    the supported levels
  - setLogLevel
```
public void setLogLevel(String loggerName,
                        LogLevel logLevel)
```
    Description copied from class: LoggingSystem
    Sets the logging level for a given logger.
    Overrides:
    setLogLevel in class LoggingSystem
    Parameters:
    loggerName - the name of the logger to set (null can be used for the root logger).
    logLevel - the log level (null can be used to remove any custom level for the logger and use the default configuration instead)
  - getLoggerConfigurations
```
public List<LoggerConfiguration> getLoggerConfigurations()
```
    Description copied from class: LoggingSystem
    Returns a collection of the current configuration for all a LoggingSystem's loggers.
    Overrides:
    getLoggerConfigurations in class LoggingSystem
    Returns:
    the current configurations
  - getLoggerConfiguration
```
public LoggerConfiguration getLoggerConfiguration(String loggerName)
```
    Description copied from class: LoggingSystem
    Returns the current configuration for a LoggingSystem's logger.
    Overrides:
    getLoggerConfiguration in class LoggingSystem
    Parameters:
    loggerName - the name of the logger
    Returns:
    the current configuration
  - getShutdownHandler
```
public Runnable getShutdownHandler()
```
    Description copied from class: LoggingSystem
    Returns a Runnable that can handle shutdown of this logging system when the JVM exits. The default implementation returns null, indicating that no shutdown is required.
    Overrides:
    getShutdownHandler in class LoggingSystem
    Returns:
    the shutdown handler, or null
  - cleanUp
```
public void cleanUp()
```
    Description copied from class: LoggingSystem
    Clean up the logging system. The default implementation does nothing. Subclasses should override this method to perform any logging system-specific cleanup.
    Overrides:
    cleanUp in class Slf4JLoggingSystem

Class Log4J2LoggingSystem

Nested Class Summary

Nested classes/interfaces inherited from class org.springframework.boot.logging.AbstractLoggingSystem

Field Summary

Fields inherited from class org.springframework.boot.logging.AbstractLoggingSystem

Fields inherited from class org.springframework.boot.logging.LoggingSystem

Constructor Summary

Method Summary

Methods inherited from class org.springframework.boot.logging.Slf4JLoggingSystem

Methods inherited from class org.springframework.boot.logging.AbstractLoggingSystem

Methods inherited from class org.springframework.boot.logging.LoggingSystem

Methods inherited from class java.lang.Object

Constructor Detail

Log4J2LoggingSystem

Method Detail

getStandardConfigLocations

isClassAvailable

beforeInitialize

initialize

loadDefaults

loadConfiguration

loadConfiguration

reinitialize

getSupportedLogLevels

setLogLevel

getLoggerConfigurations

getLoggerConfiguration

getShutdownHandler

cleanUp