Logger Class. More...

#include <logger.h>

Public Types
typedef isc::log::Formatter< Logger >	Formatter
	The formatter used to replace placeholders.

Public Member Functions
	Logger (const char *name)
	Constructor.

virtual	~Logger ()
	Destructor.

Formatter	debug (int dbglevel, const MessageID &ident)
	Output Debug Message.

Formatter	error (const MessageID &ident)
	Output Error Message.

Formatter	fatal (const MessageID &ident)
	Output Fatal Message.

virtual int	getDebugLevel ()
	Return DEBUG Level.

virtual int	getEffectiveDebugLevel ()
	Get Effective Debug Level for Logger.

virtual isc::log::Severity	getEffectiveSeverity ()
	Get Effective Severity Level for Logger.

virtual std::string	getName ()
	Get Name of Logger.

virtual isc::log::Severity	getSeverity ()
	Get Severity Level for Logger.

bool	hasAppender (OutputOption::Destination const destination)
	Check if this logger has an appender of the given type.

Formatter	info (const MessageID &ident)
	Output Informational Message.

virtual bool	isDebugEnabled (int dbglevel=MIN_DEBUG_LEVEL)
	Returns if Debug Message Should Be Output.

virtual bool	isErrorEnabled ()
	Is ERROR Enabled?

virtual bool	isFatalEnabled ()
	Is FATAL Enabled?

virtual bool	isInfoEnabled ()
	Is INFO Enabled?

virtual bool	isWarnEnabled ()
	Is WARNING Enabled?

bool	operator== (Logger &other)
	Equality.

void	setInterprocessSync (isc::log::interprocess::InterprocessSync *sync)
	Replace the interprocess synchronization object.

virtual void	setSeverity (isc::log::Severity severity, int dbglevel=1)
	Set Severity Level for Logger.

Formatter	warn (const MessageID &ident)
	Output Warning Message.

Static Public Member Functions
static std::string	getVersion ()
	Version.

Static Public Attributes
static const size_t	MAX_LOGGER_NAME_SIZE = 31
	Maximum size of a logger name.

Friends
class	isc::log::Formatter< Logger >

Detailed Description

Logger Class.

This class is the main class used for logging. Use comprises:

Constructing a logger by instantiating it with a specific name. (If the same logger is in multiple functions within a file, overhead can be minimized by declaring it as a file-wide static variable.)
Using the error(), info() etc. methods to log an error. (However, it is recommended to use the LOG_ERROR, LOG_INFO etc. macros defined in macros.h. These will avoid the potentially-expensive evaluation of arguments if the severity is such that the message will be suppressed.)

Definition at line 142 of file log/logger.h.

Member Typedef Documentation

◆ Formatter

isc::log::Formatter<Logger> isc::log::Logger::Formatter

The formatter used to replace placeholders.

Definition at line 192 of file log/logger.h.

Constructor & Destructor Documentation

◆ Logger()

isc::log::Logger::Logger ( const char * name )

inline

Constructor.

Creates/attaches to a logger of a specific name.

Parameters

name	Name of the logger. If the name is that of the root name, this creates an instance of the root logger; otherwise it creates a child of the root logger.

Note: The name of the logger may be no longer than MAX_LOGGER_NAME_SIZE else the program will throw an exception. This restriction allows loggers to be declared statically: the name is stored in a fixed-size array to avoid the need to allocate heap storage during program initialization (which causes problems on some operating systems).; Note also that there is no constructor taking a std::string. This minimizes the possibility of initializing a static logger with a string, so leading to problems mentioned above.

Definition at line 164 of file log/logger.h.

References isc_throw, and MAX_LOGGER_NAME_SIZE.

◆ ~Logger()

isc::log::Logger::~Logger ( )

virtual

Destructor.

Definition at line 49 of file log/logger.cc.

Member Function Documentation

◆ debug()

Logger::Formatter isc::log::Logger::debug	(	int	dbglevel,
		const MessageID &	ident )

Output Debug Message.

Parameters

dbglevel	Debug level, ranging between 0 and 99. Higher numbers are used for more verbose output.
ident	Message identification.

Definition at line 149 of file log/logger.cc.

References isc::log::DEBUG, and isDebugEnabled().

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◆ error()

Logger::Formatter isc::log::Logger::error ( const MessageID & ident )

Output Error Message.

Parameters

ident Message identification.

Definition at line 179 of file log/logger.cc.

References isc::log::ERROR, and isErrorEnabled().

Referenced by isc::log::LoggerManager::readLocalMessageFile().

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◆ fatal()

Logger::Formatter isc::log::Logger::fatal ( const MessageID & ident )

Output Fatal Message.

Parameters

ident Message identification.

Definition at line 189 of file log/logger.cc.

References isc::log::FATAL, and isFatalEnabled().

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◆ getDebugLevel()

int isc::log::Logger::getDebugLevel ( )

virtual

Return DEBUG Level.

Returns: Current setting of debug level. This is returned regardless of whether the severity is set to debug.

Definition at line 95 of file log/logger.cc.

References getDebugLevel().

Referenced by getDebugLevel().

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◆ getEffectiveDebugLevel()

int isc::log::Logger::getEffectiveDebugLevel ( )

virtual

Get Effective Debug Level for Logger.

Returns: The effective debug level of the logger. This is the same as getDebugLevel() if the logger has a debug level set, but otherwise is the debug level of the parent.

Definition at line 103 of file log/logger.cc.

References getEffectiveDebugLevel().

Referenced by getEffectiveDebugLevel().

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◆ getEffectiveSeverity()

isc::log::Severity isc::log::Logger::getEffectiveSeverity ( )

virtual

Get Effective Severity Level for Logger.

Returns: The effective severity level of the logger. This is the same as getSeverity() if the logger has a severity level set, but otherwise is the severity of the parent.

Definition at line 88 of file log/logger.cc.

References getEffectiveSeverity().

Referenced by getEffectiveSeverity().

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◆ getName()

std::string isc::log::Logger::getName ( )

virtual

Get Name of Logger.

Returns: The full name of the logger (including the root name)

Definition at line 67 of file log/logger.cc.

References getName().

Referenced by getName().

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◆ getSeverity()

isc::log::Severity isc::log::Logger::getSeverity ( )

virtual

Get Severity Level for Logger.

Returns: The current logging level of this logger. In most cases though, the effective logging level is what is required.

Definition at line 81 of file log/logger.cc.

References getSeverity().

Referenced by getSeverity().

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◆ getVersion()

std::string isc::log::Logger::getVersion ( )

static

Version.

Definition at line 60 of file log/logger.cc.

References isc::log::LoggerImpl::getVersion().

Referenced by isc::dhcp::Dhcpv4Srv::getVersion(), isc::dhcp::Dhcpv6Srv::getVersion(), and isc::process::DControllerBase::getVersion().

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◆ hasAppender()

bool isc::log::Logger::hasAppender ( OutputOption::Destination const destination )

Check if this logger has an appender of the given type.

Parameters

destination the appender type to be checked: console, file or syslog

Returns: true if an appender of the given type is found, false otherwise

Definition at line 206 of file log/logger.cc.

References isc::log::LoggerImpl::hasAppender().

Referenced by main().

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◆ info()

Logger::Formatter isc::log::Logger::info ( const MessageID & ident )

Output Informational Message.

Parameters

ident Message identification.

Definition at line 159 of file log/logger.cc.

References isc::log::INFO, and isInfoEnabled().

Referenced by isc::log::LoggerManager::readLocalMessageFile().

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◆ isDebugEnabled()

bool isc::log::Logger::isDebugEnabled ( int dbglevel = MIN_DEBUG_LEVEL )

virtual

Returns if Debug Message Should Be Output.

Parameters

dbglevel Level for which debugging is checked. Debugging is enabled only if the logger has DEBUG enabled and if the dbglevel checked is less than or equal to the debug level set for the logger.

Definition at line 110 of file log/logger.cc.

References isDebugEnabled().

Referenced by debug(), and isDebugEnabled().

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◆ isErrorEnabled()

bool isc::log::Logger::isErrorEnabled ( )

virtual

Is ERROR Enabled?

Definition at line 125 of file log/logger.cc.

References isErrorEnabled().

Referenced by error(), and isErrorEnabled().

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◆ isFatalEnabled()

bool isc::log::Logger::isFatalEnabled ( )

virtual

Is FATAL Enabled?

Definition at line 130 of file log/logger.cc.

References isFatalEnabled().

Referenced by fatal(), and isFatalEnabled().

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◆ isInfoEnabled()

bool isc::log::Logger::isInfoEnabled ( )

virtual

Is INFO Enabled?

Definition at line 115 of file log/logger.cc.

References isInfoEnabled().

Referenced by info(), and isInfoEnabled().

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◆ isWarnEnabled()

bool isc::log::Logger::isWarnEnabled ( )

virtual

Is WARNING Enabled?

Definition at line 120 of file log/logger.cc.

References isWarnEnabled().

Referenced by isWarnEnabled(), and warn().

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◆ operator==()

bool isc::log::Logger::operator== ( Logger & other )

Equality.

Check if two instances of this logger refer to the same stream.

Returns: true if the logger objects are instances of the same logger.

Definition at line 213 of file log/logger.cc.

◆ setInterprocessSync()

void isc::log::Logger::setInterprocessSync ( isc::log::interprocess::InterprocessSync * sync )

Replace the interprocess synchronization object.

If this method is called with null as the argument, it throws a BadInterprocessSync exception.

Note: This method is intended to be used only within this log library and its tests. Normal application shouldn't use it (in fact, normal application shouldn't even be able to instantiate InterprocessSync objects).

Parameters

sync	The logger uses this synchronization object for synchronizing output of log messages. It should be deletable and the ownership is transferred to the logger. If null is passed, a BadInterprocessSync exception is thrown.

Definition at line 201 of file log/logger.cc.

References isc::log::LoggerImpl::setInterprocessSync().

Referenced by isc::log::LoggerManager::readLocalMessageFile().

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◆ setSeverity()

void isc::log::Logger::setSeverity	(	isc::log::Severity	severity,
		int	dbglevel = 1 )

virtual

Set Severity Level for Logger.

Sets the level at which this logger will log messages. If none is set, the level is inherited from the parent.

Parameters

severity	Severity level to log
dbglevel	If the severity is DEBUG, this is the debug level. This can be in the range 1 to 100 and controls the verbosity. A value outside these limits is silently coerced to the nearest boundary.

Definition at line 74 of file log/logger.cc.

References isc::log::LoggerImpl::setSeverity().

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◆ warn()

Logger::Formatter isc::log::Logger::warn ( const MessageID & ident )

Output Warning Message.

Parameters

ident Message identification.

Definition at line 169 of file log/logger.cc.

References isWarnEnabled(), and isc::log::WARN.

Referenced by isc::log::LoggerManager::readLocalMessageFile().

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Friends And Related Symbol Documentation

◆ isc::log::Formatter< Logger >

friend class isc::log::Formatter< Logger >

friend

Definition at line 310 of file log/logger.h.

Member Data Documentation

◆ MAX_LOGGER_NAME_SIZE

const size_t isc::log::Logger::MAX_LOGGER_NAME_SIZE = 31

static

Maximum size of a logger name.

Definition at line 145 of file log/logger.h.

Referenced by Logger().

The documentation for this class was generated from the following files:

Public Types

Public Member Functions

Static Public Member Functions

Static Public Attributes

Friends

Detailed Description

Member Typedef Documentation

◆ Formatter

Constructor & Destructor Documentation

◆ Logger()

◆ ~Logger()

Member Function Documentation

◆ debug()

◆ error()

◆ fatal()

◆ getDebugLevel()

◆ getEffectiveDebugLevel()

◆ getEffectiveSeverity()

◆ getName()

◆ getSeverity()

◆ getVersion()

◆ hasAppender()

◆ info()

◆ isDebugEnabled()

◆ isErrorEnabled()

◆ isFatalEnabled()

◆ isInfoEnabled()

◆ isWarnEnabled()

◆ operator==()

◆ setInterprocessSync()

◆ setSeverity()

◆ warn()

Friends And Related Symbol Documentation

◆ isc::log::Formatter< Logger >

Member Data Documentation

◆ MAX_LOGGER_NAME_SIZE