System.Wlog.Roller

Custom implementation of LogHandler with log rotation support.

Documentation

data InvalidRotation

Constructors

InvalidRotation !Text

Instances

Eq InvalidRotation

Methods

(==) :: InvalidRotation -> InvalidRotation -> Bool

(/=) :: InvalidRotation -> InvalidRotation -> Bool

Show InvalidRotation

Methods

showsPrec :: Int -> InvalidRotation -> ShowS

show :: InvalidRotation -> String

showList :: [InvalidRotation] -> ShowS

Exception InvalidRotation

Methods

toException :: InvalidRotation -> SomeException

fromException :: SomeException -> Maybe InvalidRotation

displayException :: InvalidRotation -> String

data RollerHandler

Similar to GenericHandler. But holds file Handle inside mutable variable (MVar) to be able to rotate loggers.

Constructors

RollerHandler

Fields

• rhPriority :: Priority
• rhFormatter :: LogFormatter RollerHandler
• rhFileHandle :: MVar Handle
• rhWriteAction :: Handle -> String -> IO ()
• rhCloseAction :: Handle -> IO ()

Instances

LogHandler RollerHandler

Methods

setLevel :: RollerHandler -> Priority -> RollerHandler

getLevel :: RollerHandler -> Priority

setFormatter :: RollerHandler -> LogFormatter RollerHandler -> RollerHandler

getFormatter :: RollerHandler -> LogFormatter RollerHandler

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

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

close :: RollerHandler -> IO ()

logIndex :: FilePath -> Int -> FilePath

rotationFileHandler :: MonadIO m => RotationParameters -> FilePath -> Priority -> m RollerHandler

Create rotation logging handler.