Implementation base class for all appenders. More...

Inheritance diagram for AppenderSkeleton:

Public Member Functions
	AppenderSkeleton ()

	AppenderSkeleton (const LayoutPtr &layout)

void	addRef () const

void	releaseRef () const

void	finalize ()
	Finalize this appender by calling the derived class' `close` method. More...

virtual void	activateOptions (log4cxx::helpers::Pool &)
	Derived appenders should override this method if option structure requires it. More...

virtual void	setOption (const LogString &option, const LogString &value)
	Set `option` to `value`. More...

void	addFilter (const spi::FilterPtr &newFilter)
	Add a filter to end of the filter list. More...

void	clearFilters ()
	Clear the filters chain. More...

const spi::ErrorHandlerPtr &	getErrorHandler () const
	Return the currently set spi::ErrorHandler for this Appender. More...

spi::FilterPtr	getFilter () const
	Returns the head Filter. More...

const spi::FilterPtr &	getFirstFilter () const
	Return the first filter in the filter chain for this Appender. More...

LayoutPtr	getLayout () const
	Returns the layout of this appender. More...

LogString	getName () const
	Returns the name of this Appender. More...

const LevelPtr &	getThreshold ()
	Returns this appenders threshold level. More...

bool	isAsSevereAsThreshold (const LevelPtr &level) const
	Check whether the message level is below the appender's threshold. More...

void	doAppend (const spi::LoggingEventPtr &event, log4cxx::helpers::Pool &pool)
	This method performs threshold checks and invokes filters before delegating actual logging to the subclasses specific AppenderSkeleton::append method. More...

void	setErrorHandler (const spi::ErrorHandlerPtr &eh)
	Set the ErrorHandler for this Appender. More...

void	setLayout (const LayoutPtr &layout1)
	Set the layout for this appender. More...

void	setName (const LogString &name1)
	Set the name of this Appender. More...

void	setThreshold (const LevelPtr &threshold)
	Set the threshold level. More...

Public Member Functions inherited from Appender
virtual	~Appender ()

virtual void	close ()=0
	Release any resources allocated within the appender such as file handles, network connections, etc. More...

virtual bool	requiresLayout () const =0
	Configurators call this method to determine if the appender requires a layout. More...

Public Member Functions inherited from OptionHandler
virtual	~OptionHandler ()

Public Member Functions inherited from Object
virtual const helpers::Class &	getClass () const

virtual	~Object ()

virtual bool	instanceof (const Class &clazz) const =0

virtual const void *	cast (const Class &clazz) const =0

Public Member Functions inherited from ObjectImpl
	ObjectImpl ()

virtual	~ObjectImpl ()

void	addRef () const

void	releaseRef () const

Protected Member Functions
virtual void	append (const spi::LoggingEventPtr &event, log4cxx::helpers::Pool &p)=0
	Subclasses of `AppenderSkeleton` should implement this method to perform actual logging. More...

Protected Attributes
LayoutPtr	layout
	The layout variable does not need to be set if the appender implementation has its own layout. More...

LogString	name
	Appenders are named. More...

LevelPtr	threshold
	There is no level threshold filtering by default. More...

spi::ErrorHandlerPtr	errorHandler
	It is assumed and enforced that errorHandler is never null. More...

spi::FilterPtr	headFilter
	The first filter in the filter chain. More...

spi::FilterPtr	tailFilter
	The last filter in the filter chain. More...

bool	closed
	Is this appender closed? More...

log4cxx::helpers::Pool	pool

log4cxx::helpers::Mutex	mutex

Protected Attributes inherited from ObjectImpl
unsigned int volatile	ref

Additional Inherited Members
Static Public Member Functions inherited from Object
static const helpers::Class &	getStaticClass ()

static const log4cxx::helpers::ClassRegistration &	registerClass ()

Detailed Description

Implementation base class for all appenders.

This class provides the code for common functionality, such as support for threshold filtering and support for general filters.

Constructor & Destructor Documentation

AppenderSkeleton ( )

AppenderSkeleton ( const LayoutPtr & layout )

Member Function Documentation

virtual void activateOptions ( log4cxx::helpers::Pool & )

inlinevirtual

Derived appenders should override this method if option structure requires it.

Implements OptionHandler.

Reimplemented in DailyRollingFileAppender, ODBCAppender, FileAppender, SocketHubAppender, RollingFileAppender, SMTPAppender, TelnetAppender, WriterAppender, SyslogAppender, SocketAppenderSkeleton, RollingFileAppenderSkeleton, ConsoleAppender, and NTEventLogAppender.

void addFilter ( const spi::FilterPtr & newFilter )

virtual

Add a filter to end of the filter list.

Implements Appender.

void addRef ( ) const

virtual

Implements Object.

Reimplemented in AsyncAppender.

virtual void append	(	const spi::LoggingEventPtr &	event,
		log4cxx::helpers::Pool &	p
	)

protectedpure virtual

Subclasses of AppenderSkeleton should implement this method to perform actual logging.

See also AppenderSkeleton::doAppend method.

Implemented in ODBCAppender, SocketHubAppender, XMLSocketAppender, SocketAppender, WriterAppender, TelnetAppender, SMTPAppender, AsyncAppender, NTEventLogAppender, SyslogAppender, and OutputDebugStringAppender.

void clearFilters ( )

virtual

Clear the filters chain.

Implements Appender.

void doAppend	(	const spi::LoggingEventPtr &	event,
		log4cxx::helpers::Pool &	pool
	)

virtual

This method performs threshold checks and invokes filters before delegating actual logging to the subclasses specific AppenderSkeleton::append method.

Implements Appender.

void finalize ( )

Finalize this appender by calling the derived class' close method.

const spi::ErrorHandlerPtr& getErrorHandler ( ) const

inline

Return the currently set spi::ErrorHandler for this Appender.

spi::FilterPtr getFilter ( ) const

inlinevirtual

Returns the head Filter.

Implements Appender.

const spi::FilterPtr& getFirstFilter ( ) const

inline

Return the first filter in the filter chain for this Appender.

The return value may be 0 if no is filter is set.

LayoutPtr getLayout ( ) const

inlinevirtual

Returns the layout of this appender.

The value may be 0.

Implements Appender.

LogString getName ( ) const

inlinevirtual

Returns the name of this Appender.

Implements Appender.

const LevelPtr& getThreshold ( )

inline

Returns this appenders threshold level.

See the setThreshold method for the meaning of this option.

bool isAsSevereAsThreshold ( const LevelPtr & level ) const

Check whether the message level is below the appender's threshold.

If there is no threshold set, then the return value is always true.

void releaseRef ( ) const

virtual

Implements Object.

Reimplemented in AsyncAppender.

void setErrorHandler ( const spi::ErrorHandlerPtr & eh )

Set the ErrorHandler for this Appender.

void setLayout ( const LayoutPtr & layout1 )

inlinevirtual

Set the layout for this appender.

Note that some appenders have their own (fixed) layouts or do not use one. For example, the SocketAppender ignores the layout set here.

Implements Appender.

void setName ( const LogString & name1 )

inlinevirtual

Set the name of this Appender.

Implements Appender.

virtual void setOption	(	const LogString &	option,
		const LogString &	value
	)

virtual

Set option to value.

The handling of each option depends on the OptionHandler instance. Some options may become active immediately whereas other may be activated only when activateOptions is called.

Implements OptionHandler.

Reimplemented in DailyRollingFileAppender, AsyncAppender, WriterAppender, ODBCAppender, FileAppender, SocketAppenderSkeleton, SocketHubAppender, TelnetAppender, RollingFileAppender, SMTPAppender, SyslogAppender, ConsoleAppender, and NTEventLogAppender.

void setThreshold ( const LevelPtr & threshold )

Set the threshold level.

All log events with lower level than the threshold level are ignored by the appender.

In configuration files this option is specified by setting the value of the Threshold option to a level string, such as "DEBUG", "INFO" and so on.