weka.core

Class Debug.Log

java.lang.Object

weka.core.Debug.Log

All Implemented Interfaces:

java.io.Serializable, RevisionHandler

Enclosing class:

Debug

public static class Debug.Log
extends java.lang.Object
implements java.io.Serializable, RevisionHandler

A helper class for logging stuff. Uses the java.util.logging package. If this approach seems an "overkill" (it can create quite a few log files if used in different threads), one can use the Debug.SimpleLog class.

Version:

$Revision: 8034 $

Author:

FracPete (fracpete at waikato dot ac dot nz)

See Also:

Debug.SimpleLog, Serialized Form

Constructor Summary

Constructors

Constructor and Description
Log() default constructor, uses only stdout
Log(java.lang.String filename) creates a logger that logs into the specified file, if null then only stdout is used.
Log(java.lang.String filename, int size, int numFiles) creates a logger that logs into the specified file, if null then only stdout is used.

Method Summary

Modifier and Type	Method and Description
java.lang.String	getFilename() returns the filename of the log, can be null
int	getNumFiles() returns the number of files being used
java.lang.String	getRevision() Returns the revision string.
int	getSize() returns the size of the files
void	log(java.util.logging.Level level, java.lang.String message) logs the given message
void	log(java.util.logging.Level level, java.lang.String sourceclass, java.lang.String message) prints the given message with the specified level
void	log(java.util.logging.Level level, java.lang.String sourceclass, java.lang.String sourcemethod, java.lang.String message) prints the given message with the specified level
void	logSystemInfo() a convenience method for dumping the current system info in the log file
static java.util.logging.Level	stringToLevel(java.lang.String level) turns the string representing a level, e.g., "FINE" or "ALL" into the corresponding level (case-insensitive).
java.lang.String	toString() returns a string representation of the logger

Methods inherited from class java.lang.Object

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

Constructor Detail

Log

public Log()

default constructor, uses only stdout

Log

public Log(java.lang.String filename)

creates a logger that logs into the specified file, if null then only stdout is used. It uses 1,000,000 bytes for file size and 1 file.

Parameters:

filename - the file to log into

Log

public Log(java.lang.String filename,
           int size,
           int numFiles)

creates a logger that logs into the specified file, if null then only stdout is used.

Parameters:

filename - the file to log into

size - the size of the files in bytes

numFiles - the number of files for rotating

Method Detail

stringToLevel

public static java.util.logging.Level stringToLevel(java.lang.String level)

turns the string representing a level, e.g., "FINE" or "ALL" into the corresponding level (case-insensitive). The default is ALL.

Parameters:

level - the string to return a level for

Returns:

the corresponding level or the default

getFilename

public java.lang.String getFilename()

returns the filename of the log, can be null

Returns:

the filename of the log

getSize

public int getSize()

returns the size of the files

Returns:

the size of a file

getNumFiles

public int getNumFiles()

returns the number of files being used

Returns:

the number of files

log

public void log(java.util.logging.Level level,
                java.lang.String message)

logs the given message

Parameters:

level - the level of severity

message - the message to log

log

public void log(java.util.logging.Level level,
                java.lang.String sourceclass,
                java.lang.String message)

prints the given message with the specified level

Parameters:

level - the level of logging

sourceclass - the class that logs the message

message - the message to print

log

public void log(java.util.logging.Level level,
                java.lang.String sourceclass,
                java.lang.String sourcemethod,
                java.lang.String message)

prints the given message with the specified level

Parameters:

level - the level of logging

sourceclass - the class that logs the message

sourcemethod - the method that logs the message

message - the message to print

logSystemInfo

public void logSystemInfo()

a convenience method for dumping the current system info in the log file

See Also:

SystemInfo

toString

public java.lang.String toString()

returns a string representation of the logger

Overrides:

toString in class java.lang.Object

Returns:

a string representation of the logger

getRevision

public java.lang.String getRevision()

Returns the revision string.

Specified by:

getRevision in interface RevisionHandler

Returns:

the revision