Package cn.sliew.milky.log

Class AbstractLogger

java.lang.Object

cn.sliew.milky.log.AbstractLogger

All Implemented Interfaces:

Logger, Serializable

Direct Known Subclasses:

NoLogger, Slf4jLogger, StdOutLogger

public abstract class AbstractLogger
extends Object
implements Logger, Serializable

A skeletal implementation of Logger. This class implements all methods that have a LogLevel parameter by default to call specific logger methods such as Logger.info(String) or Logger.isInfoEnabled().

See Also:

Serialized Form

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AbstractLogger(String name)	Creates a new instance.

Method Summary

Modifier and Type	Method	Description
void	debug(Throwable t)	Log an exception (throwable) at the DEBUG level.
void	error(Throwable t)	Log an exception (throwable) at the ERROR level.
void	info(Throwable t)	Log an exception (throwable) at the INFO level.
boolean	isEnabled(LogLevel level)	Whether the logger instance enabled for the specified level.
void	log(LogLevel level, String msg)	Log a message at the specified level.
void	log(LogLevel level, String format, Object arg)	Log a message at the specified level according to the specified format and argument.
void	log(LogLevel level, String format, Object... arguments)	Log a message at the specified level according to the specified format and arguments.
void	log(LogLevel level, String format, Object argA, Object argB)	Log a message at the specified level according to the specified format and arguments.
void	log(LogLevel level, String msg, Throwable cause)	Log an exception (throwable) at the specified level with an accompanying message.
void	log(LogLevel level, Throwable cause)	Log an exception (throwable) at the specified level.
String	name()	Return the name of this Logger instance.
protected Object	readResolve()
String	toString()
void	trace(Throwable t)	Log an exception (throwable) at the TRACE level.
void	warn(Throwable t)	Log an exception (throwable) at the WARN level.

Methods inherited from class java.lang.Object

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

Methods inherited from interface cn.sliew.milky.log.Logger

debug, debug, debug, debug, debug, error, error, error, error, error, info, info, info, info, info, isDebugEnabled, isErrorEnabled, isInfoEnabled, isTraceEnabled, isWarnEnabled, trace, trace, trace, trace, trace, warn, warn, warn, warn, warn

Constructor Detail

AbstractLogger

protected AbstractLogger(String name)

Creates a new instance.

Method Detail

name

public String name()

Description copied from interface: Logger

Return the name of this Logger instance.

Specified by:

name in interface Logger

Returns:

name of this logger instance

isEnabled

public boolean isEnabled(LogLevel level)

Description copied from interface: Logger

Whether the logger instance enabled for the specified level.

Specified by:

isEnabled in interface Logger

Returns:

True if this Logger is enabled for the specified level, false otherwise.

trace

public void trace(Throwable t)

Description copied from interface: Logger

Log an exception (throwable) at the TRACE level.

Specified by:

trace in interface Logger

Parameters:

t - the exception (throwable) to log

debug

public void debug(Throwable t)

Description copied from interface: Logger

Log an exception (throwable) at the DEBUG level.

Specified by:

debug in interface Logger

Parameters:

t - the exception (throwable) to log

info

public void info(Throwable t)

Description copied from interface: Logger

Log an exception (throwable) at the INFO level.

Specified by:

info in interface Logger

Parameters:

t - the exception (throwable) to log

warn

public void warn(Throwable t)

Description copied from interface: Logger

Log an exception (throwable) at the WARN level.

Specified by:

warn in interface Logger

Parameters:

t - the exception (throwable) to log

error

public void error(Throwable t)

Description copied from interface: Logger

Log an exception (throwable) at the ERROR level.

Specified by:

error in interface Logger

Parameters:

t - the exception (throwable) to log

log

public void log(LogLevel level,
                String msg,
                Throwable cause)

Description copied from interface: Logger

Log an exception (throwable) at the specified level with an accompanying message.

Specified by:

log in interface Logger

msg - the message accompanying the exception

cause - the exception (throwable) to log

log

public void log(LogLevel level,
                Throwable cause)

Description copied from interface: Logger

Log an exception (throwable) at the specified level.

Specified by:

log in interface Logger

cause - the exception (throwable) to log

log

public void log(LogLevel level,
                String msg)

Description copied from interface: Logger

Log a message at the specified level.

Specified by:

log in interface Logger

msg - the message string to be logged

log

public void log(LogLevel level,
                String format,
                Object arg)

Description copied from interface: Logger

Log a message at the specified level according to the specified format and argument.

This form avoids superfluous object creation when the logger is disabled for the specified level.

Specified by:

log in interface Logger

format - the format string

arg - the argument

log

public void log(LogLevel level,
                String format,
                Object argA,
                Object argB)

Description copied from interface: Logger

Log a message at the specified level according to the specified format and arguments.

This form avoids superfluous object creation when the logger is disabled for the specified level.

Specified by:

log in interface Logger

format - the format string

argA - the first argument

argB - the second argument

log

public void log(LogLevel level,
                String format,
                Object... arguments)

Description copied from interface: Logger

Log a message at the specified level according to the specified format and arguments.

This form avoids superfluous string concatenation when the logger is disabled for the specified level. However, this variant incurs the hidden (and relatively small) cost of creating an Object[] before invoking the method, even if this logger is disabled for the specified level. The variants taking one and two arguments exist solely in order to avoid this hidden cost.

Specified by:

log in interface Logger

format - the format string

arguments - a list of 3 or more arguments

readResolve

protected Object readResolve()
                      throws ObjectStreamException

Throws:

ObjectStreamException

toString

public String toString()

Overrides:

toString in class Object