weka.knowledgeflow

Class LogHandler

java.lang.Object

weka.knowledgeflow.LogHandler

public class LogHandler
extends Object

Class that wraps a weka.gui.Logger and filters log messages according to the set logging level. Note that warnings and errors reported via the logWarning() and logError() methods will always be output regardless of the logging level set.

Version:

$Revision: $

Author:

Mark Hall (mhall{[at]}pentaho{[dot]}com)

Constructor Summary

Constructors

Constructor and Description
LogHandler(Logger log) Constructor that takes a log
LogHandler(Logger log, boolean status) Constructor that takes a log
LogHandler(Step source) Constructor that takes a Step.

Method Summary

Modifier and Type	Method and Description
Logger	getLog() Get the wrapped log
LoggingLevel	getLoggingLevel() Get the logging level in use
void	log(String message, LoggingLevel messageLevel) Log a message at the supplied level
void	logBasic(String message) Log at the basic level
void	logDebug(String message) Log at the debugging level
void	logDetailed(String message) Log at the detailed level
void	logError(String message, Exception cause) Log an error
void	logLow(String message) Log at the low level
void	logWarning(String message) Log a warning
void	setLogger(Logger log) Set the log wrap
void	setLoggingLevel(LoggingLevel level) Set the logging level to use
static String	stackTraceToString(Throwable throwable) Utility method to convert a stack trace to a String
void	statusMessage(String message) Output a status message

Methods inherited from class java.lang.Object

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

Constructor Detail

LogHandler

public LogHandler(Step source)

Constructor that takes a Step. Uses the log from the step

Parameters:

source - the source Step

LogHandler

public LogHandler(Logger log)

Constructor that takes a log

Parameters:

log - the log to wrap

LogHandler

public LogHandler(Logger log,
                  boolean status)

Constructor that takes a log

Parameters:

log - the log to wrap

status - true if warning and error messages should be output to the status area as well as to the log

Method Detail

stackTraceToString

public static String stackTraceToString(Throwable throwable)

Utility method to convert a stack trace to a String

Parameters:

throwable - the Throwable to convert to a stack trace string

Returns:

the string containing the stack trace

setLogger

public void setLogger(Logger log)

Set the log wrap

Parameters:

log - the log to wrap

getLog

public Logger getLog()

Get the wrapped log

Returns:

the wrapped log

getLoggingLevel

public LoggingLevel getLoggingLevel()

Get the logging level in use

Returns:

setLoggingLevel

public void setLoggingLevel(LoggingLevel level)

Set the logging level to use

Parameters:

level - the level to use

logLow

public void logLow(String message)

Log at the low level

Parameters:

message - the message to log

logBasic

public void logBasic(String message)

Log at the basic level

Parameters:

message - the message to log

logDetailed

public void logDetailed(String message)

Log at the detailed level

Parameters:

message - the message to log

logDebug

public void logDebug(String message)

Log at the debugging level

Parameters:

message - the message to log

logWarning

public void logWarning(String message)

Log a warning

Parameters:

message - the message to log

logError

public void logError(String message,
                     Exception cause)

Log an error

Parameters:

message - the message to log

cause - the cause of the error

statusMessage

public void statusMessage(String message)

Output a status message

Parameters:

message - the status message

log

public void log(String message,
                LoggingLevel messageLevel)

Log a message at the supplied level

Parameters:

message - the message to log

messageLevel - the level to log at