weka.core.logging

Class Logger

java.lang.Object

weka.core.logging.Logger

All Implemented Interfaces:

RevisionHandler

Direct Known Subclasses:

ConsoleLogger

public abstract class Logger
extends java.lang.Object
implements RevisionHandler

Abstract superclass for all loggers.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Logger.Level The logging level.

Field Summary

Fields

Modifier and Type	Field and Description
protected static java.text.SimpleDateFormat	m_DateFormat for formatting the dates.
protected Logger.Level	m_MinLevel the minimum level of log events to have in order to end up in the log.
protected static java.util.Properties	m_Properties the properties file.
protected static Logger	m_Singleton the singleton instance of the logger.
static java.lang.String	PROPERTIES_FILE the properties file.

Constructor Summary

Constructors

Constructor and Description
Logger() Initializes the logger.

Method Summary

Modifier and Type	Method and Description
protected abstract void	doLog(Logger.Level level, java.lang.String msg, java.lang.String cls, java.lang.String method, int lineno) Performs the actual logging.
protected static java.lang.String[]	getLocation() Returns the location the logging happened.
Logger.Level	getMinLevel() Returns the minimum level log messages must have in order to appear in the log.
static Logger	getSingleton() Returns the singleton instance of the logger.
protected void	initialize() Initializes the logger.
static void	log(Logger.Level level, java.lang.String msg) Logs the given message under the given level.
static void	log(Logger.Level level, java.lang.Throwable t) Logs the given message under the given level.

Methods inherited from class java.lang.Object

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

Methods inherited from interface weka.core.RevisionHandler

getRevision

Field Detail

PROPERTIES_FILE

public static final java.lang.String PROPERTIES_FILE

the properties file.

See Also:

Constant Field Values

m_Singleton

protected static Logger m_Singleton

the singleton instance of the logger.

m_Properties

protected static java.util.Properties m_Properties

the properties file.

m_DateFormat

protected static java.text.SimpleDateFormat m_DateFormat

for formatting the dates.

m_MinLevel

protected Logger.Level m_MinLevel

the minimum level of log events to have in order to end up in the log.

Constructor Detail

Logger

public Logger()

Initializes the logger.

Method Detail

getLocation

protected static java.lang.String[] getLocation()

Returns the location the logging happened.

Returns:

the classname (= [0]), the method (= [1]) and the line number (= [2]) that generated the logging event

getSingleton

public static Logger getSingleton()

Returns the singleton instance of the logger.

Returns:

the logger instance

log

public static void log(Logger.Level level,
                       java.lang.String msg)

Logs the given message under the given level.

Parameters:

level - the level of the message

msg - the message to log

log

public static void log(Logger.Level level,
                       java.lang.Throwable t)

Logs the given message under the given level.

Parameters:

level - the level of the message

t - the throwable to log

initialize

protected void initialize()

Initializes the logger.

getMinLevel

public Logger.Level getMinLevel()

Returns the minimum level log messages must have in order to appear in the log.

Returns:

the level

doLog

protected abstract void doLog(Logger.Level level,
                              java.lang.String msg,
                              java.lang.String cls,
                              java.lang.String method,
                              int lineno)

Performs the actual logging. Actual logger implementations must override this method.

Parameters:

level - the level of the message

msg - the message to log

cls - the classname originating the log event

method - the method originating the log event

lineno - the line number originating the log event