edu.northwestern.at.utils.logger

Interface Logger

All Known Implementing Classes:

BaseLogger, DummyLogger, StandardErrorLogger, StandardOutputLogger

public interface Logger

Interface for a logger.

A logger is used to write messages to a log file. Each message has an associated level of severity. In increasing order these are:

1. debug
2. information
3. warning
4. error
5. fatal

Please see LoggerConstants for the associated numeric values for each level.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	isDebuggingEnabled() Returns true if debugging messages are enabled.
boolean	isLoggerEnabled() Returns true if logger is enabled.
void	log(int level, java.lang.String str) Log a message at a specified level.
void	log(int level, java.lang.String str, java.lang.Throwable t) Log a message with a stack trace.
void	logDebug(java.lang.String str) Log a message at the Debug level.
void	logError(java.lang.String str) Log a message at the Error level.
void	logError(java.lang.String str, java.lang.Throwable t) Logs a error message with a stack trace.
void	logFatal(java.lang.String str) Log a message at the Fatal level.
void	logFatal(java.lang.String str, java.lang.Throwable t) Logs a fatal message with a stack trace.
void	logInfo(java.lang.String str) Log a message at the Info level.
void	logWarning(java.lang.String str) Log a message at the Warn level.
void	terminate() Terminate.logger.

Method Detail

logDebug

void logDebug(java.lang.String str)

Log a message at the Debug level.

Parameters:

str - Log message.

logInfo

void logInfo(java.lang.String str)

Log a message at the Info level.

Parameters:

str - Log message.

logWarning

void logWarning(java.lang.String str)

Log a message at the Warn level.

Parameters:

str - Log message.

logError

void logError(java.lang.String str)

Log a message at the Error level.

Parameters:

str - Log message.

logError

void logError(java.lang.String str,
            java.lang.Throwable t)

Logs a error message with a stack trace.

Parameters:

str - Log message.

t - Throwable.

logFatal

void logFatal(java.lang.String str)

Log a message at the Fatal level.

Parameters:

str - Log message.

logFatal

void logFatal(java.lang.String str,
            java.lang.Throwable t)

Logs a fatal message with a stack trace.

Parameters:

str - Log message.

t - Throwable.

log

void log(int level,
       java.lang.String str)

Log a message at a specified level.

Parameters:

level - Message level. See LoggerConstants for the allowed values.

str - Log message.

log

void log(int level,
       java.lang.String str,
       java.lang.Throwable t)

Log a message with a stack trace.

Parameters:

level - Message level. See LoggerConstants for the allowed values.

str - Log message.

t - Throwable.

isDebuggingEnabled

boolean isDebuggingEnabled()

Returns true if debugging messages are enabled.

Returns:

True if debugging messages are enabled.

isLoggerEnabled

boolean isLoggerEnabled()

Returns true if logger is enabled.

Returns:

True if logger is enabled.

terminate

void terminate()

Terminate.logger.