Log.Class

The MonadLog type class of monads with logging capabilities.

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 -> 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 :: UTCTime -> LogLevel -> Text -> Value -> 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.