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# log4cplus Namespace Reference

## Compounds
class | Appender
| Extend this class for implementing your own strategies for printing log statements. More...
class | BasicConfigurator
| Use this class to quickly configure the package. More...
class | ConfigureAndWatchThread
class | ConsoleAppender
| ConsoleAppender appends log events to `System.out` or `System.err` using a layout specified by the user. More...
class | DailyRollingFileAppender
| DailyRollingFileAppender extends FileAppender so that the underlying file is rolled over at a user chosen frequency. More...
class | DefaultLoggerFactory
| This class is used to create the default implementation of the Logger class. More...
struct | DiagnosticContext
| This is the internal object that is stored on the NDC stack. More...
class | ErrorHandler
| This class is used to "handle" errors encountered in an Appender. More...
class | FileAppender
| Appends log events to a file. More...
class | Hierarchy
| This class is specialized in retrieving loggers by name and also maintaining the logger hierarchy. More...
class | HierarchyLocker
| This is used to lock a Hierarchy. More...
class | Layout
| This class is used to layout strings sent to an Appender. More...
class | Logger
| This is the central class in the log4cplus package. More...
class | LogLevelManager
| This class is used to "manage" LogLevel definitions. More...
class | NDC
| The NDC class implements nested diagnostic contexts as defined by Neil Harrison in the article "Patterns for Logging Diagnostic Messages" part of the book "<i>Pattern Languages of Program Design 3</i>" edited by Martin et al. More...
class | NDCContextCreator
| This class ensures that a NDC#push call is always matched with a NDC#pop call even in the face of exceptions. More...
class | NullAppender
| Appends log events to a file. More...
class | OnlyOnceErrorHandler
class | PatternLayout
| A flexible layout configurable with pattern string. More...
class | PropertyConfigurator
| Provides configuration from an external file. More...
class | RollingFileAppender
| RollingFileAppender extends FileAppender to backup the log files when they reach a certain size. More...
class | SimpleLayout
| SimpleLayout consists of the LogLevel of the log statement, followed by " - " and then the log message itself. More...
class | SocketAppender
| Sends LoggingEvent objects to a remote a log server. More...
class | tostringstream
class | TraceLogger
| This class is used to produce "Trace" logging. More...
class | TTCCLayout
| TTCC layout format consists of time, thread, Logger and nested diagnostic context information, hence the name. More...
## Typedefs
typedef LOG4CPLUS_FSTREAM_NAMESPACE::ofstream | tofstream
typedef LOG4CPLUS_FSTREAM_NAMESPACE::ifstream | tifstream
typedef std::vector< Logger > | LoggerList
typedef int | LogLevel
typedef log4cplus::tstring(* | LogLevelToStringMethod )(LogLevel)
| This method type defined the signature of methods that convert LogLevels into strings.
typedef LogLevel(* | StringToLogLevelMethod )(const log4cplus::tstring &)
| This method type defined the signature of methods that convert strings into LogLevels.
typedef std::stack< DiagnosticContext > | DiagnosticContextStack
typedef std::vector< log4cplus::SharedAppenderPtr > | SharedAppenderPtrList
typedef LOG4CPLUS_STREAM_NAMESPACE::ostream | tostream
typedef LOG4CPLUS_STREAM_NAMESPACE::istream | tistream
typedef char | tchar
typedef std::string | tstring
## Enumerations
enum | DailyRollingFileSchedule { MONTHLY, WEEKLY, DAILY, TWICE_DAILY, HOURLY, MINUTELY }
## Functions
LOG4CPLUS_EXPORT LogLevelManager & | getLogLevelManager ()
| Returns the singleton LogLevelManager.
LOG4CPLUS_EXPORT NDC & | getNDC ()
| Return a reference to the singleton object.
## Variables
This is a pointer to an Appender.typedef helpers::SharedObjectPtr< Appender > | SharedAppenderPtr
const LogLevel | OFF_LOG_LEVEL = 60000
const LogLevel | FATAL_LOG_LEVEL = 50000
const LogLevel | ERROR_LOG_LEVEL = 40000
const LogLevel | WARN_LOG_LEVEL = 30000
const LogLevel | INFO_LOG_LEVEL = 20000
const LogLevel | DEBUG_LOG_LEVEL = 10000
const LogLevel | TRACE_LOG_LEVEL = 0
const LogLevel | ALL_LOG_LEVEL = TRACE_LOG_LEVEL
const LogLevel | NOT_SET_LOG_LEVEL = -1
tostream & | tcout = LOG4CPLUS_STREAM_NAMESPACE::cout
tostream & | tcerr = LOG4CPLUS_STREAM_NAMESPACE::cerr

## Typedef Documentation

typedef std::stack<DiagnosticContext> log4cplus::DiagnosticContextStack

| Definition at line 38 of file ndc.h.

typedef std::vector<Logger> log4cplus::LoggerList

| Definition at line 46 of file logger.h.

typedef int log4cplus::LogLevel

| Definition at line 36 of file loglevel.h. Referenced by log4cplus::spi::InternalLoggingEvent::getLogLevel(), log4cplus::spi::LoggerImpl::getLogLevel(), and log4cplus::Appender::getThreshold().

typedef log4cplus::tstring(* log4cplus::LogLevelToStringMethod)(LogLevel)

| This method type defined the signature of methods that convert LogLevels into strings. Note: Must return an empty `tstring` for unrecognized values. Definition at line 92 of file loglevel.h.

typedef std::vector<log4cplus::SharedAppenderPtr> log4cplus::SharedAppenderPtrList

| Definition at line 28 of file appenderattachable.h.

typedef LogLevel(* log4cplus::StringToLogLevelMethod)(const log4cplus::tstring&)

| This method type defined the signature of methods that convert strings into LogLevels. Note: Must return `NOT_SET_LOG_LEVEL` for unrecognized values. Definition at line 100 of file loglevel.h.

typedef char log4cplus::tchar

| Definition at line 47 of file tstring.h.

typedef LOG4CPLUS_FSTREAM_NAMESPACE::ifstream log4cplus::tifstream

| Definition at line 38 of file fstreams.h.

typedef LOG4CPLUS_STREAM_NAMESPACE::istream log4cplus::tistream

| Definition at line 54 of file streams.h.

typedef LOG4CPLUS_FSTREAM_NAMESPACE::ofstream log4cplus::tofstream

| Definition at line 37 of file fstreams.h.

typedef LOG4CPLUS_STREAM_NAMESPACE::ostream log4cplus::tostream

| Definition at line 53 of file streams.h.

typedef std::string log4cplus::tstring

| Definition at line 48 of file tstring.h. Referenced by log4cplus::helpers::convertIntegerToString(), log4cplus::spi::InternalLoggingEvent::InternalLoggingEvent(), and log4cplus::tostringstream::str().

## Enumeration Type Documentation

enum log4cplus::DailyRollingFileSchedule

  | Enumeration values:
  MONTHLY |
  WEEKLY |
  DAILY |
  TWICE_DAILY |
  HOURLY |
  MINUTELY |
Definition at line 112 of file fileappender.h.

## Function Documentation

LOG4CPLUS_EXPORT LogLevelManager& getLogLevelManager | ( |  | ) |

| Returns the singleton LogLevelManager. Referenced by log4cplus::Layout::Layout().

LOG4CPLUS_EXPORT NDC& getNDC | ( |  | ) |

| Return a reference to the singleton object. Referenced by log4cplus::spi::InternalLoggingEvent::getNDC(), log4cplus::spi::InternalLoggingEvent::InternalLoggingEvent(), log4cplus::NDCContextCreator::NDCContextCreator(), and log4cplus::NDCContextCreator::~NDCContextCreator().

## Variable Documentation

const LogLevel log4cplus::ALL_LOG_LEVEL = TRACE_LOG_LEVEL

| Definition at line 77 of file loglevel.h.

const LogLevel log4cplus::DEBUG_LOG_LEVEL = 10000

| Definition at line 67 of file loglevel.h.

const LogLevel log4cplus::ERROR_LOG_LEVEL = 40000

| Definition at line 51 of file loglevel.h.

const LogLevel log4cplus::FATAL_LOG_LEVEL = 50000

| Definition at line 46 of file loglevel.h. Referenced by log4cplus::Logger::assertion().

const LogLevel log4cplus::INFO_LOG_LEVEL = 20000

| Definition at line 62 of file loglevel.h.

const LogLevel log4cplus::NOT_SET_LOG_LEVEL = -1

| Definition at line 83 of file loglevel.h. Referenced by log4cplus::Appender::isAsSevereAsThreshold().

const LogLevel log4cplus::OFF_LOG_LEVEL = 60000

| Definition at line 41 of file loglevel.h.

typedef helpers::SharedObjectPtr<Appender> log4cplus::SharedAppenderPtr

| Definition at line 27 of file appenderattachable.h.

tostream& log4cplus::tcerr = LOG4CPLUS_STREAM_NAMESPACE::cerr`[static]`

| Definition at line 56 of file streams.h.

tostream& log4cplus::tcout = LOG4CPLUS_STREAM_NAMESPACE::cout`[static]`

| Definition at line 55 of file streams.h.

const LogLevel log4cplus::TRACE_LOG_LEVEL = 0

| Definition at line 72 of file loglevel.h. Referenced by log4cplus::TraceLogger::TraceLogger(), and log4cplus::TraceLogger::~TraceLogger().

const LogLevel log4cplus::WARN_LOG_LEVEL = 30000

| Definition at line 56 of file loglevel.h.