com.groiss.log
Class Logger

java.lang.Object
  com.groiss.log.Logger

All Implemented Interfaces:

Service, ILogger

public class Logger
extends java.lang.Object
implements ILogger

Default implementation of the ILogger interface.

Field Summary

protected static java.io.PrintWriter	err
protected static java.util.Date	errdate
protected static java.io.File	errfile
protected static long	errs
protected static java.lang.String	linesep
protected static java.io.PrintWriter	log
protected static java.io.File	logfile
protected static int	trace

Constructor Summary

Logger()

Logger(java.io.PrintWriter logger, int traceLevel)

Method Summary

java.io.File	getErrorLogFile() The file where errors are logged, if errors are logged to a separate file.
long	getExceptionCount() Return the number of exceptions since startup
java.util.Date	getLastExceptionDate() Return the date when the last exception has occured
int	getLevel() Returns the log level.
java.io.File	getLogFile() Return the Reader to read the current log file.
protected java.lang.String	getLogPrefix(int level) Returns the prefix of a log entry (which is the part before the specific log message).
java.io.PrintWriter	getWriter() Return the Writer to write some stuff to the log file.
boolean	isRunning()
void	log(java.lang.String str) This method writes the given string into the logfile.
void	log(java.lang.String str, int level) This method writes the given string into the logfile.
void	logError(java.lang.Throwable e) Prints a header line and a stack trace for the given Error or Exception
void	logError(java.lang.Throwable error, java.lang.String errHeader) Prints a header line and a stack trace for the given Error or Exception
void	logError(java.lang.Throwable error, java.lang.String errHeader, int level) Prints a header line and a stack trace for the given Error or Exception
void	reconfigure()
void	restart() Restart the Logger (reinitialize log file)
void	shutdown()
void	startup()

Methods inherited from class java.lang.Object

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

Field Detail

log

protected static java.io.PrintWriter log

err

protected static java.io.PrintWriter err

logfile

protected static java.io.File logfile

errfile

protected static java.io.File errfile

trace

protected static int trace

errs

protected static long errs

errdate

protected static java.util.Date errdate

linesep

protected static java.lang.String linesep

Constructor Detail

Logger

public Logger()

Logger

public Logger(java.io.PrintWriter logger,
              int traceLevel)

Method Detail

shutdown

public void shutdown()
              throws ApplicationException

Specified by:

shutdown in interface Service

Throws:

ApplicationException

isRunning

public boolean isRunning()
                  throws ApplicationException

Specified by:

isRunning in interface Service

Throws:

ApplicationException

reconfigure

public void reconfigure()
                 throws ApplicationException

Specified by:

reconfigure in interface Service

Throws:

ApplicationException

startup

public void startup()
             throws ApplicationException

Specified by:

startup in interface Service

Throws:

ApplicationException

log

public void log(java.lang.String str)

This method writes the given string into the logfile.

Parameters:

str - string to put into the logfile

log

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

This method writes the given string into the logfile. depending on the log level

Specified by:

log in interface ILogger

Parameters:

str - string to put into the logfile

level - the log level, an integer between 0 and 4

logError

public void logError(java.lang.Throwable e)

Prints a header line and a stack trace for the given Error or Exception

Specified by:

logError in interface ILogger

logError

public void logError(java.lang.Throwable error,
                     java.lang.String errHeader)

Prints a header line and a stack trace for the given Error or Exception

Specified by:

logError in interface ILogger

Parameters:

error - a Throwable object

errHeader - the text for the header line

logError

public void logError(java.lang.Throwable error,
                     java.lang.String errHeader,
                     int level)

Prints a header line and a stack trace for the given Error or Exception

Specified by:

logError in interface ILogger

Parameters:

error - a Throwable object

errHeader - the text for the header line

level - an integer between 0 and 4. The exception is logged if greater or equal the log level,

getExceptionCount

public long getExceptionCount()

Description copied from interface: ILogger

Return the number of exceptions since startup

Specified by:

getExceptionCount in interface ILogger

Returns:

a long value

getLastExceptionDate

public java.util.Date getLastExceptionDate()

Description copied from interface: ILogger

Return the date when the last exception has occured

Specified by:

getLastExceptionDate in interface ILogger

Returns:

a date value

getLogFile

public java.io.File getLogFile()
                        throws ApplicationException

Return the Reader to read the current log file. The reader should be closed by the caller after usage. Returns null when logging on console.

Specified by:

getLogFile in interface ILogger

Returns:

the log file

Throws:

ApplicationException

getErrorLogFile

public java.io.File getErrorLogFile()
                             throws ApplicationException

Description copied from interface: ILogger

The file where errors are logged, if errors are logged to a separate file.

Specified by:

getErrorLogFile in interface ILogger

Returns:

the error file

Throws:

ApplicationException

getWriter

public java.io.PrintWriter getWriter()

Return the Writer to write some stuff to the log file. Do not close this writer, it is used for logging.

Specified by:

getWriter in interface ILogger

getLevel

public int getLevel()

Returns the log level.

Specified by:

getLevel in interface ILogger

restart

public void restart()
             throws ApplicationException

Description copied from interface: ILogger

Restart the Logger (reinitialize log file)

Specified by:

restart in interface ILogger

Throws:

ApplicationException

getLogPrefix

protected java.lang.String getLogPrefix(int level)

Returns the prefix of a log entry (which is the part before the specific log message). This prefix consists of the log level, the threads name and the current date.

Parameters:

level -