System.Log.Handler

Definition of log handler support

For some handlers, check out System.Log.Handler.Simple and System.Log.Handler.Syslog.

Please see System.Log.Logger for extensive documentation on the logging system.

Written by John Goerzen, [e-mail]

Basic Types

class LogHandler a where

All log handlers should adhere to this.

This is the base class for the various log handlers. They should all adhere to this class.

Minimal complete definition

setLevel, getLevel, setFormatter, emit, close

Methods

setLevel :: a -> Priority -> a

Sets the log level. handle will drop items beneath this level.

getLevel :: a -> Priority

Gets the current level.

setFormatter :: a -> LogFormatter a -> a

Set a log formatter to customize the log format for this Handler

getFormatter :: a -> LogFormatter a

handle :: a -> LogRecord -> String -> IO ()

Logs an event if it meets the requirements given by the most recent call to setLevel.

emit :: a -> LogRecord -> String -> IO ()

Forces an event to be logged regardless of the configured level.

close :: a -> IO ()

Closes the logging system, causing it to close any open files, etc.

Instances

LogHandler SyslogHandler

Defined in System.Log.Handler.Syslog

Methods

setLevel :: SyslogHandler -> Priority -> SyslogHandler

getLevel :: SyslogHandler -> Priority

setFormatter :: SyslogHandler -> LogFormatter SyslogHandler -> SyslogHandler

getFormatter :: SyslogHandler -> LogFormatter SyslogHandler

handle :: SyslogHandler -> LogRecord -> String -> IO ()

emit :: SyslogHandler -> LogRecord -> String -> IO ()

close :: SyslogHandler -> IO ()

LogHandler (GenericHandler a)

Defined in System.Log.Handler.Simple

Methods

setLevel :: GenericHandler a -> Priority -> GenericHandler a

getLevel :: GenericHandler a -> Priority

setFormatter :: GenericHandler a -> LogFormatter (GenericHandler a) -> GenericHandler a

getFormatter :: GenericHandler a -> LogFormatter (GenericHandler a)

handle :: GenericHandler a -> LogRecord -> String -> IO ()

emit :: GenericHandler a -> LogRecord -> String -> IO ()

close :: GenericHandler a -> IO ()