Safe Haskell	None
Language	Haskell2010

Log.Class

Description

The MonadLog type class of monads with logging capabilities.

Synopsis

Documentation

data UTCTime :: * #

This is the simplest representation of UTC. It consists of the day number, and a time offset from midnight. Note that if a day has a leap second added to it, it will have 86401 seconds.

Instances

Eq UTCTime
Methods (==) :: UTCTime -> UTCTime -> Bool # (/=) :: UTCTime -> UTCTime -> Bool #
Data UTCTime
Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> UTCTime -> c UTCTime # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c UTCTime # toConstr :: UTCTime -> Constr # dataTypeOf :: UTCTime -> DataType # dataCast1 :: Typeable (* -> ) t => (forall d. Data d => c (t d)) -> Maybe (c UTCTime) # dataCast2 :: Typeable ( -> * -> *) t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c UTCTime) # gmapT :: (forall b. Data b => b -> b) -> UTCTime -> UTCTime # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> UTCTime -> r # gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> UTCTime -> r # gmapQ :: (forall d. Data d => d -> u) -> UTCTime -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> UTCTime -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> UTCTime -> m UTCTime # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> UTCTime -> m UTCTime # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> UTCTime -> m UTCTime #
Ord UTCTime
Methods compare :: UTCTime -> UTCTime -> Ordering # (<) :: UTCTime -> UTCTime -> Bool # (<=) :: UTCTime -> UTCTime -> Bool # (>) :: UTCTime -> UTCTime -> Bool # (>=) :: UTCTime -> UTCTime -> Bool # max :: UTCTime -> UTCTime -> UTCTime # min :: UTCTime -> UTCTime -> UTCTime #
ToJSON UTCTime
Methods toJSON :: UTCTime -> Value # toEncoding :: UTCTime -> Encoding # toJSONList :: [UTCTime] -> Value # toEncodingList :: [UTCTime] -> Encoding #
ToJSONKey UTCTime
Methods toJSONKey :: ToJSONKeyFunction UTCTime # toJSONKeyList :: ToJSONKeyFunction [UTCTime] #
FromJSON UTCTime
Methods parseJSON :: Value -> Parser UTCTime # parseJSONList :: Value -> Parser [UTCTime] #
FromJSONKey UTCTime
Methods fromJSONKey :: FromJSONKeyFunction UTCTime # fromJSONKeyList :: FromJSONKeyFunction [UTCTime] #
NFData UTCTime
Methods rnf :: UTCTime -> () #
FormatTime UTCTime
Methods formatCharacter :: Char -> Maybe (TimeLocale -> Maybe NumericPadOption -> Maybe Int -> UTCTime -> String) #
ParseTime UTCTime
Methods buildTime :: TimeLocale -> [(Char, String)] -> Maybe UTCTime #

class Monad m => MonadTime (m :: * -> *) where #

Class of monads which carry the notion of the current time.

Minimal complete definition

currentTime

Methods

currentTime :: m UTCTime #

Instances

MonadTime IO	Base instance for IO.
Methods currentTime :: IO UTCTime #
(MonadTime m, MonadTrans t, Monad (t m)) => MonadTime (t m)	Generic, overlapping instance.
Methods currentTime :: t m UTCTime #

class MonadTime m => MonadLog m where #

Represents the family of monads with logging capabilities. Each MonadLog carries with it some associated state (the logging environment) that can be modified locally with localData and localDomain.

Minimal complete definition

logMessage, localData, localDomain

Methods

logMessage #

Arguments

:: UTCTime	Time of the event.
-> LogLevel	Log level.
-> Text	Log message.
-> Value	Additional data associated with the message.
-> m ()

Write a message to the log.

localData :: [Pair] -> m a -> m a #

Extend the additional data associated with each log message locally.

localDomain :: Text -> m a -> m a #

Extend the current application domain locally.

Instances

(MonadLog m, Monad (t m), MonadTransControl t) => MonadLog (t m) #	Generic, overlapping instance.
Methods logMessage :: UTCTime -> LogLevel -> Text -> Value -> t m () # localData :: [Pair] -> t m a -> t m a # localDomain :: Text -> t m a -> t m a #
(MonadBase IO m, MonadTime m) => MonadLog (LogT m) #
Methods logMessage :: UTCTime -> LogLevel -> Text -> Value -> LogT m () # localData :: [Pair] -> LogT m a -> LogT m a # localDomain :: Text -> LogT m a -> LogT m a #

logAttention :: (MonadLog m, ToJSON a) => Text -> a -> m () #

Log a message and its associated data using current time as the event time and the LogAttention log level.

logInfo :: (MonadLog m, ToJSON a) => Text -> a -> m () #

Log a message and its associated data using current time as the event time and the LogInfo log level.

logTrace :: (MonadLog m, ToJSON a) => Text -> a -> m () #

Log a message and its associated data using current time as the event time and the LogTrace log level.

logAttention_ :: MonadLog m => Text -> m () #

Like logAttention, but without any additional associated data.

logInfo_ :: MonadLog m => Text -> m () #

Like logInfo, but without any additional associated data.

logTrace_ :: MonadLog m => Text -> m () #

Like logTrace, but without any additional associated data.