de.uniba.wiai.lspi.util.logging
Class Logger

java.lang.Object
  de.uniba.wiai.lspi.util.logging.Logger

All Implemented Interfaces:

java.io.Serializable

Direct Known Subclasses:

DummyLogger, Log4jLogger, SystemOutPrintlnLogger

public abstract class Logger
extends java.lang.Object
implements java.io.Serializable

This class is the abstract class to be implemented by a logger that should be used within the framework.
A reference to a logger can be obtained by getLogger(java.lang.String) or getLogger(java.lang.Class).
You can use a custom logger by extending this class and setting the system property de.uniba.wiai.lspi.util.logging.logger.class to the FQN of your logger class.
getLogger(java.lang.String) or getLogger(java.lang.Class) then try to instantiate your logger. If that fails one of the standard loggers is created. The standard logger is Log4jLogger. If log4j is not availalbe from the classpath DummyLogger is the standard logger. If you set the system property de.uniba.wiai.lspi.util.logging.off to true DummyLogger is the standard logger.
When implementing a custom logger you have to consider that the logger may be transferred over the network when classes are passed as parameters to remote methods. The custom logger must have a public constructor with String as parameter.

Version:

1.0.5

Author:

sven

See Also:

Serialized Form

Nested Class Summary

static class

Logger.LogLevel

Field Summary

static java.lang.String	LOGGER_CLASS_NAME_PROPERTY_NAME Name of property that specifies the name of the logger class to be used.
static java.lang.String	LOGGING_OFF_PROPERTY_NAME Name of property that defines if logging is off.

Method Summary

abstract void	debug(java.lang.Object msg)
abstract void	debug(java.lang.Object msg, java.lang.Throwable t)
abstract void	error(java.lang.Object msg)
abstract void	error(java.lang.Object msg, java.lang.Throwable t)
abstract void	fatal(java.lang.Object msg)
abstract void	fatal(java.lang.Object msg, java.lang.Throwable t)
static Logger	getLogger(java.lang.Class _class)
static Logger	getLogger(java.lang.String name)
abstract void	info(java.lang.Object msg)
abstract void	info(java.lang.Object msg, java.lang.Throwable t)
abstract boolean	isEnabledFor(Logger.LogLevel l)
abstract void	warn(java.lang.Object msg)
abstract void	warn(java.lang.Object msg, java.lang.Throwable t)

Methods inherited from class java.lang.Object

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

Field Detail

LOGGER_CLASS_NAME_PROPERTY_NAME

public static final java.lang.String LOGGER_CLASS_NAME_PROPERTY_NAME

Name of property that specifies the name of the logger class to be used.

See Also:

Constant Field Values

LOGGING_OFF_PROPERTY_NAME

public static final java.lang.String LOGGING_OFF_PROPERTY_NAME

Name of property that defines if logging is off.

See Also:

Constant Field Values

Method Detail

getLogger

public static Logger getLogger(java.lang.Class _class)

Parameters:

_class -

Returns:

The logger for the given class.

getLogger

public static Logger getLogger(java.lang.String name)

Parameters:

name -

Returns:

The logger with the given name.

isEnabledFor

public abstract boolean isEnabledFor(Logger.LogLevel l)

debug

public abstract void debug(java.lang.Object msg)

Parameters:

msg -

debug

public abstract void debug(java.lang.Object msg,
                           java.lang.Throwable t)

Parameters:

msg -

t -

info

public abstract void info(java.lang.Object msg)

Parameters:

msg -

info

public abstract void info(java.lang.Object msg,
                          java.lang.Throwable t)

Parameters:

msg -

t -

warn

public abstract void warn(java.lang.Object msg)

Parameters:

msg -

warn

public abstract void warn(java.lang.Object msg,
                          java.lang.Throwable t)

Parameters:

msg -

t -

error

public abstract void error(java.lang.Object msg)

Parameters:

msg -

error

public abstract void error(java.lang.Object msg,
                           java.lang.Throwable t)

Parameters:

msg -

t -

fatal

public abstract void fatal(java.lang.Object msg)

Parameters:

msg -

fatal

public abstract void fatal(java.lang.Object msg,
                           java.lang.Throwable t)

Parameters:

msg -

t -