Package org.slf4j.impl

Class Log4jLoggerAdapter

java.lang.Object

org.slf4j.helpers.MarkerIgnoringBase

org.slf4j.impl.Log4jLoggerAdapter

All Implemented Interfaces:

Serializable, Logger, LocationAwareLogger

public final class Log4jLoggerAdapter
extends MarkerIgnoringBase
implements LocationAwareLogger, Serializable

A wrapper over org.apache.log4j.Logger in conforming to the Logger interface.

Note that the logging levels mentioned in this class refer to those defined in the org.apache.log4j.Level class.

The TRACE level was introduced in log4j version 1.2.12. In order to avoid crashing the host application, in the case the log4j version in use predates 1.2.12, the TRACE level will be mapped as DEBUG. See also SLF4J-59.

Author:

Ceki Gülcü

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
protected String	name

Fields inherited from interface org.slf4j.spi.LocationAwareLogger

DEBUG_INT, ERROR_INT, INFO_INT, TRACE_INT, WARN_INT

Fields inherited from interface org.slf4j.Logger

ROOT_LOGGER_NAME

Method Summary

Modifier and Type	Method	Description
void	debug(String msg)	Log a message object at level DEBUG.
void	debug(String format, Object arg)	Log a message at level DEBUG according to the specified format and argument.
void	debug(String format, Object... arguments)	Log a message at level DEBUG according to the specified format and arguments.
void	debug(String format, Object arg1, Object arg2)	Log a message at level DEBUG according to the specified format and arguments.
void	debug(String msg, Throwable t)	Log an exception (throwable) at level DEBUG with an accompanying message.
void	error(String msg)	Log a message object at the ERROR level.
void	error(String format, Object arg)	Log a message at the ERROR level according to the specified format and argument.
void	error(String format, Object... argArray)	Log a message at level ERROR according to the specified format and arguments.
void	error(String format, Object arg1, Object arg2)	Log a message at the ERROR level according to the specified format and arguments.
void	error(String msg, Throwable t)	Log an exception (throwable) at the ERROR level with an accompanying message.
String	getName()	Return the name of this Logger instance.
void	info(String msg)	Log a message object at the INFO level.
void	info(String format, Object arg)	Log a message at level INFO according to the specified format and argument.
void	info(String format, Object... argArray)	Log a message at level INFO according to the specified format and arguments.
void	info(String format, Object arg1, Object arg2)	Log a message at the INFO level according to the specified format and arguments.
void	info(String msg, Throwable t)	Log an exception (throwable) at the INFO level with an accompanying message.
boolean	isDebugEnabled()	Is this logger instance enabled for the DEBUG level?
boolean	isErrorEnabled()	Is this logger instance enabled for level ERROR?
boolean	isInfoEnabled()	Is this logger instance enabled for the INFO level?
boolean	isTraceEnabled()	Is this logger instance enabled for the TRACE level?
boolean	isWarnEnabled()	Is this logger instance enabled for the WARN level?
void	log(LoggingEvent event)
void	log(Marker marker, String callerFQCN, int level, String msg, Object[] argArray, Throwable t)	Printing method with support for location information.
protected Object	readResolve()	Replace this instance with a homonymous (same name) logger returned by LoggerFactory.
void	trace(String msg)	Log a message object at level TRACE.
void	trace(String format, Object arg)	Log a message at level TRACE according to the specified format and argument.
void	trace(String format, Object... arguments)	Log a message at level TRACE according to the specified format and arguments.
void	trace(String format, Object arg1, Object arg2)	Log a message at level TRACE according to the specified format and arguments.
void	trace(String msg, Throwable t)	Log an exception (throwable) at level TRACE with an accompanying message.
void	warn(String msg)	Log a message object at the WARN level.
void	warn(String format, Object arg)	Log a message at the WARN level according to the specified format and argument.
void	warn(String format, Object... argArray)	Log a message at level WARN according to the specified format and arguments.
void	warn(String format, Object arg1, Object arg2)	Log a message at the WARN level according to the specified format and arguments.
void	warn(String msg, Throwable t)	Log an exception (throwable) at the WARN level with an accompanying message.

Methods inherited from class org.slf4j.helpers.MarkerIgnoringBase

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

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.slf4j.Logger

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

Field Detail

name

protected String name

Method Detail

isTraceEnabled

public boolean isTraceEnabled()

Is this logger instance enabled for the TRACE level?

Specified by:

isTraceEnabled in interface Logger

Returns:

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

trace

public void trace(String msg)

Log a message object at level TRACE.

Specified by:

trace in interface Logger

Parameters:

msg - - the message object to be logged

trace

public void trace(String format,
                  Object arg)

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

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

Specified by:

trace in interface Logger

Parameters:

format - the format string

arg - the argument

trace

public void trace(String format,
                  Object arg1,
                  Object arg2)

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

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

Specified by:

trace in interface Logger

Parameters:

format - the format string

arg1 - the first argument

arg2 - the second argument

trace

public void trace(String format,
                  Object... arguments)

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

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

Specified by:

trace in interface Logger

Parameters:

format - the format string

arguments - an array of arguments

trace

public void trace(String msg,
                  Throwable t)

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

Specified by:

trace in interface Logger

Parameters:

msg - the message accompanying the exception

t - the exception (throwable) to log

isDebugEnabled

public boolean isDebugEnabled()

Is this logger instance enabled for the DEBUG level?

Specified by:

isDebugEnabled in interface Logger

Returns:

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

debug

public void debug(String msg)

Log a message object at level DEBUG.

Specified by:

debug in interface Logger

Parameters:

msg - - the message object to be logged

debug

public void debug(String format,
                  Object arg)

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

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

Specified by:

debug in interface Logger

Parameters:

format - the format string

arg - the argument

debug

public void debug(String format,
                  Object arg1,
                  Object arg2)

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

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

Specified by:

debug in interface Logger

Parameters:

format - the format string

arg1 - the first argument

arg2 - the second argument

debug

public void debug(String format,
                  Object... arguments)

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

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

Specified by:

debug in interface Logger

Parameters:

format - the format string

arguments - an array of arguments

debug

public void debug(String msg,
                  Throwable t)

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

Specified by:

debug in interface Logger

Parameters:

msg - the message accompanying the exception

t - the exception (throwable) to log

isInfoEnabled

public boolean isInfoEnabled()

Is this logger instance enabled for the INFO level?

Specified by:

isInfoEnabled in interface Logger

Returns:

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

info

public void info(String msg)

Log a message object at the INFO level.

Specified by:

info in interface Logger

Parameters:

msg - - the message object to be logged

info

public void info(String format,
                 Object arg)

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

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

Specified by:

info in interface Logger

Parameters:

format - the format string

arg - the argument

info

public void info(String format,
                 Object arg1,
                 Object arg2)

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

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

Specified by:

info in interface Logger

Parameters:

format - the format string

arg1 - the first argument

arg2 - the second argument

info

public void info(String format,
                 Object... argArray)

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

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

Specified by:

info in interface Logger

Parameters:

format - the format string

argArray - an array of arguments

info

public void info(String msg,
                 Throwable t)

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

Specified by:

info in interface Logger

Parameters:

msg - the message accompanying the exception

t - the exception (throwable) to log

isWarnEnabled

public boolean isWarnEnabled()

Is this logger instance enabled for the WARN level?

Specified by:

isWarnEnabled in interface Logger

Returns:

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

warn

public void warn(String msg)

Log a message object at the WARN level.

Specified by:

warn in interface Logger

Parameters:

msg - - the message object to be logged

warn

public void warn(String format,
                 Object arg)

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

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

Specified by:

warn in interface Logger

Parameters:

format - the format string

arg - the argument

warn

public void warn(String format,
                 Object arg1,
                 Object arg2)

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

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

Specified by:

warn in interface Logger

Parameters:

format - the format string

arg1 - the first argument

arg2 - the second argument

warn

public void warn(String format,
                 Object... argArray)

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

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

Specified by:

warn in interface Logger

Parameters:

format - the format string

argArray - an array of arguments

warn

public void warn(String msg,
                 Throwable t)

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

Specified by:

warn in interface Logger

Parameters:

msg - the message accompanying the exception

t - the exception (throwable) to log

isErrorEnabled

public boolean isErrorEnabled()

Is this logger instance enabled for level ERROR?

Specified by:

isErrorEnabled in interface Logger

Returns:

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

error

public void error(String msg)

Log a message object at the ERROR level.

Specified by:

error in interface Logger

Parameters:

msg - - the message object to be logged

error

public void error(String format,
                  Object arg)

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

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

Specified by:

error in interface Logger

Parameters:

format - the format string

arg - the argument

error

public void error(String format,
                  Object arg1,
                  Object arg2)

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

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

Specified by:

error in interface Logger

Parameters:

format - the format string

arg1 - the first argument

arg2 - the second argument

error

public void error(String format,
                  Object... argArray)

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

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

Specified by:

error in interface Logger

Parameters:

format - the format string

argArray - an array of arguments

error

public void error(String msg,
                  Throwable t)

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

Specified by:

error in interface Logger

Parameters:

msg - the message accompanying the exception

t - the exception (throwable) to log

log

public void log(Marker marker,
                String callerFQCN,
                int level,
                String msg,
                Object[] argArray,
                Throwable t)

Description copied from interface: LocationAwareLogger

Printing method with support for location information.

Specified by:

log in interface LocationAwareLogger

Parameters:

marker - The marker to be used for this event, may be null.

callerFQCN - The fully qualified class name of the logger instance, typically the logger class, logger bridge or a logger wrapper.

level - One of the level integers defined in this interface

msg - The message for the log event

t - Throwable associated with the log event, may be null.

log

public void log(LoggingEvent event)

getName

public String getName()

Description copied from interface: Logger

Return the name of this Logger instance.

Specified by:

getName in interface Logger

Returns:

name of this logger instance

readResolve

protected Object readResolve()
                      throws ObjectStreamException

Replace this instance with a homonymous (same name) logger returned by LoggerFactory. Note that this method is only called during deserialization.

This approach will work well if the desired ILoggerFactory is the one references by LoggerFactory. However, if the user manages its logger hierarchy through a different (non-static) mechanism, e.g. dependency injection, then this approach would be mostly counterproductive.

Returns:

logger with same name as returned by LoggerFactory

Throws:

ObjectStreamException