edu.northwestern.at.utils.logger

Class StandardErrorLogger

java.lang.Object

edu.northwestern.at.utils.logger.StandardErrorLogger

All Implemented Interfaces:

Logger

Direct Known Subclasses:

StandardOutputLogger

public class StandardErrorLogger
extends java.lang.Object
implements Logger

Simple logger which outputs log messages to standard error.

Field Summary

Fields

Modifier and Type	Field and Description
protected static java.lang.String[]	errorLevelStrings Error level strings for display.
protected java.lang.Object	lock Lock for synchronizing output.
protected boolean	loggerEnabled True if logger enabled.
protected java.io.PrintStream	printStream PrintStream for output.

Constructor Summary

Constructors

Constructor and Description
StandardErrorLogger() Create a standard error logger.

Method Summary

Methods

Modifier and Type	Method and Description
protected static java.lang.String	getErrorLevelString(int level) Get string representation of error level.
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) Logs a message.
void	log(int level, java.lang.String str, java.lang.Throwable t) Logs a message with a stack trace.
void	logDebug(java.lang.String str) Logs a message at the DEBUG level.
void	logError(java.lang.String str) Logs 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) Logs 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) Logs a message at the INFO level.
void	logWarning(java.lang.String str) Logs a message at the WARN level.
void	terminate() Terminates the logger.

Methods inherited from class java.lang.Object

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

Field Detail

printStream

protected java.io.PrintStream printStream

PrintStream for output.

loggerEnabled

protected boolean loggerEnabled

True if logger enabled.

errorLevelStrings

protected static final java.lang.String[] errorLevelStrings

Error level strings for display.

lock

protected java.lang.Object lock

Lock for synchronizing output.

Constructor Detail

StandardErrorLogger

public StandardErrorLogger()

Create a standard error logger.

Method Detail

terminate

public void terminate()

Terminates the logger.

Specified by:

terminate in interface Logger

logDebug

public void logDebug(java.lang.String str)

Logs a message at the DEBUG level.

Specified by:

logDebug in interface Logger

Parameters:

str - Log message.

logInfo

public void logInfo(java.lang.String str)

Logs a message at the INFO level.

Specified by:

logInfo in interface Logger

Parameters:

str - Log message.

logWarning

public void logWarning(java.lang.String str)

Logs a message at the WARN level.

Specified by:

logWarning in interface Logger

Parameters:

str - Log message.

logError

public void logError(java.lang.String str)

Logs a message at the ERROR level.

Specified by:

logError in interface Logger

Parameters:

str - Log message.

logError

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

Logs a error message with a stack trace.

Specified by:

logError in interface Logger

Parameters:

str - Log message.

t - Throwable.

logFatal

public void logFatal(java.lang.String str)

Logs a message at the FATAL level.

Specified by:

logFatal in interface Logger

Parameters:

str - Log message.

logFatal

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

Logs a fatal message with a stack trace.

Specified by:

logFatal in interface Logger

Parameters:

str - Log message.

t - Throwable.

getErrorLevelString

protected static java.lang.String getErrorLevelString(int level)

Get string representation of error level.

Parameters:

level - The error level.

Returns:

String representation of level.

log

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

Logs a message.

Specified by:

log in interface Logger

Parameters:

level - Log message level.

str - Log message.

log

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

Logs a message with a stack trace.

Specified by:

log in interface Logger

Parameters:

level - Log message level.

str - Log message.

t - Throwable.

isDebuggingEnabled

public boolean isDebuggingEnabled()

Returns true if debugging messages are enabled.

Specified by:

isDebuggingEnabled in interface Logger

Returns:

True if debugging messages are enabled.

isLoggerEnabled

public boolean isLoggerEnabled()

Returns true if logger is enabled.

Specified by:

isLoggerEnabled in interface Logger

Returns:

True if logger is enabled.