Copyright	Copyright (C) 2004-2011 John Goerzen
License	BSD3
Portability	portable
Safe Haskell	Safe
Language	Haskell2010

System.Log

Contents

Types

Description

Haskell Logging Framework

Written by John Goerzen, jgoerzen@complete.org

This module defines basic types used for logging.

Extensive documentation is available in System.Log.Logger.

Synopsis

data Priority
- = DEBUG
- | INFO
- | NOTICE
- | WARNING
- | ERROR
- | CRITICAL
- | ALERT
- | EMERGENCY
type LogRecord = (Priority, String)

Types

data Priority Source #

Priorities are used to define how important a log message is. Users can filter log messages based on priorities.

These have their roots on the traditional syslog system. The standard definitions are given below, but you are free to interpret them however you like. They are listed here in ascending importance order.

Constructors

DEBUG	Debug messages
INFO	Information
NOTICE	Normal runtime conditions
WARNING	General Warnings
ERROR	General Errors
CRITICAL	Severe situations
ALERT	Take immediate action
EMERGENCY	System is unusable

Instances

Bounded Priority Source #
Instance details Defined in System.Log Methods minBound :: Priority # maxBound :: Priority #
Enum Priority Source #
Instance details Defined in System.Log Methods succ :: Priority -> Priority # pred :: Priority -> Priority # toEnum :: Int -> Priority # fromEnum :: Priority -> Int # enumFrom :: Priority -> [Priority] # enumFromThen :: Priority -> Priority -> [Priority] # enumFromTo :: Priority -> Priority -> [Priority] # enumFromThenTo :: Priority -> Priority -> Priority -> [Priority] #
Eq Priority Source #
Instance details Defined in System.Log Methods (==) :: Priority -> Priority -> Bool # (/=) :: Priority -> Priority -> Bool #
Data Priority Source #
Instance details Defined in System.Log Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Priority -> c Priority # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c Priority # toConstr :: Priority -> Constr # dataTypeOf :: Priority -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c Priority) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Priority) # gmapT :: (forall b. Data b => b -> b) -> Priority -> Priority # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Priority -> r # gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Priority -> r # gmapQ :: (forall d. Data d => d -> u) -> Priority -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> Priority -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> Priority -> m Priority # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Priority -> m Priority # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Priority -> m Priority #
Ord Priority Source #
Instance details Defined in System.Log Methods compare :: Priority -> Priority -> Ordering # (<) :: Priority -> Priority -> Bool # (<=) :: Priority -> Priority -> Bool # (>) :: Priority -> Priority -> Bool # (>=) :: Priority -> Priority -> Bool # max :: Priority -> Priority -> Priority # min :: Priority -> Priority -> Priority #
Read Priority Source #
Instance details Defined in System.Log Methods readsPrec :: Int -> ReadS Priority # readList :: ReadS [Priority] # readPrec :: ReadPrec Priority # readListPrec :: ReadPrec [Priority] #
Show Priority Source #
Instance details Defined in System.Log Methods showsPrec :: Int -> Priority -> ShowS # show :: Priority -> String # showList :: [Priority] -> ShowS #
Generic Priority Source #
Instance details Defined in System.Log Associated Types type Rep Priority :: Type -> Type # Methods from :: Priority -> Rep Priority x # to :: Rep Priority x -> Priority #
NFData Priority Source #	Since: 1.3.1.0
Instance details Defined in System.Log Methods rnf :: Priority -> () #
type Rep Priority Source #
Instance details Defined in System.Log type Rep Priority = D1 (MetaData "Priority" "System.Log" "hslogger-1.3.1.0-DmGQNXFaR77Fqc2qmwKhmf" False) (((C1 (MetaCons "DEBUG" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "INFO" PrefixI False) (U1 :: Type -> Type)) :+: (C1 (MetaCons "NOTICE" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "WARNING" PrefixI False) (U1 :: Type -> Type))) :+: ((C1 (MetaCons "ERROR" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "CRITICAL" PrefixI False) (U1 :: Type -> Type)) :+: (C1 (MetaCons "ALERT" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "EMERGENCY" PrefixI False) (U1 :: Type -> Type))))

type LogRecord = (Priority, String) Source #

Internal type of log records