Package org.geotools.util.logging

Class Log4JLoggerFactory

Object

LoggerFactory<Logger>

Log4JLoggerFactory

public class Log4JLoggerFactory
extends LoggerFactory<Logger>

A factory for loggers that redirect all Java logging events to the Apache's Log4J framework.

Since:

2.4

Author:

Martin Desruisseaux

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	Log4JLoggerFactory()	Constructs a default factory.

Method Summary

Modifier and Type	Method	Description
protected Logger	getImplementation(String name)	Returns the implementation to use for the logger of the specified name, or null if the logger would delegates to Java logging anyway.
static Log4JLoggerFactory	getInstance()	Returns the unique instance of this factory.
String	lookupConfiguration()	Look up configuration information, or null unknown.
protected Logger	unwrap(Logger logger)	Returns the implementation wrapped by the specified logger, or null if none.
protected Logger	wrap(String name, Logger implementation)	Wraps the specified implementation in a Java logger.

Methods inherited from class LoggerFactory

getImplementationClass, getLogger

Methods inherited from class Object

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

Constructor Details

Log4JLoggerFactory

protected Log4JLoggerFactory()
                      throws NoClassDefFoundError

Constructs a default factory.

Throws:

NoClassDefFoundError - if Apache's Log class was not found on the classpath.

Method Details

getInstance

public static Log4JLoggerFactory getInstance()
                                      throws NoClassDefFoundError

Returns the unique instance of this factory.

Throws:

NoClassDefFoundError - if Apache's Log class was not found on the classpath.

getImplementation

protected Logger getImplementation(String name)

Returns the implementation to use for the logger of the specified name, or null if the logger would delegates to Java logging anyway.

Specified by:

getImplementation in class LoggerFactory<Logger>

Parameters:

name - The name of the logger.

Returns:

The logger as an object of the target logging framework (Log4J, SLF4J, etc.), or null if the target framework would redirect to the Java logging framework.

wrap

protected Logger wrap(String name,
 Logger implementation)

Wraps the specified implementation in a Java logger.

Specified by:

wrap in class LoggerFactory<Logger>

Parameters:

name - The name of the logger.

implementation - An implementation returned by LoggerFactory.getImplementation(java.lang.String).

Returns:

A new logger wrapping the specified implementation.

unwrap

protected Logger unwrap(Logger logger)

Returns the implementation wrapped by the specified logger, or null if none.

Specified by:

unwrap in class LoggerFactory<Logger>

Parameters:

logger - The logger to test.

Returns:

The implementation wrapped by the specified logger, or null if none.

lookupConfiguration

public String lookupConfiguration()

Description copied from class: LoggerFactory

Look up configuration information, or null unknown.

Report back details on how logging configuration is setup. Ideally including configuration filename along with any system properties used.

Overrides:

lookupConfiguration in class LoggerFactory<Logger>

Returns:

configuration information, or null unknown.