System.Logging.Facade

This module is intended to be imported qualified:

import qualified System.Logging.Facade as Log

Producing log messages

log :: (?loc :: CallStack) => Logging m => LogLevel -> String -> m ()

Produce a log message with specified log level.

trace :: (?loc :: CallStack) => Logging m => String -> m ()

Produce a log message with log level TRACE.

debug :: (?loc :: CallStack) => Logging m => String -> m ()

Produce a log message with log level DEBUG.

info :: (?loc :: CallStack) => Logging m => String -> m ()

Produce a log message with log level INFO.

warn :: (?loc :: CallStack) => Logging m => String -> m ()

Produce a log message with log level WARN.

error :: (?loc :: CallStack) => Logging m => String -> m ()

Produce a log message with log level ERROR.

Types

class Monad m => Logging m

A type class for monads with logging support

Minimal complete definition

consumeLogRecord

Instances

Logging IO

Log messages that are produced in the IO monad are consumed by the global LogSink.

Methods

consumeLogRecord :: LogRecord -> IO ()

Logging m => Logging (MaybeT m)

Methods

consumeLogRecord :: LogRecord -> MaybeT m ()

Logging m => Logging (ListT m)

Methods

consumeLogRecord :: LogRecord -> ListT m ()

(Monoid w, Logging m) => Logging (WriterT w m)

Methods

consumeLogRecord :: LogRecord -> WriterT w m ()

(Monoid w, Logging m) => Logging (WriterT w m)

Methods

consumeLogRecord :: LogRecord -> WriterT w m ()

Logging m => Logging (StateT s m)

Methods

consumeLogRecord :: LogRecord -> StateT s m ()

Logging m => Logging (StateT s m)

Methods

consumeLogRecord :: LogRecord -> StateT s m ()

Logging m => Logging (IdentityT * m)

Methods

consumeLogRecord :: LogRecord -> IdentityT * m ()

Logging m => Logging (ExceptT e m)

Methods

consumeLogRecord :: LogRecord -> ExceptT e m ()

(Error e, Logging m) => Logging (ErrorT e m)

Methods

consumeLogRecord :: LogRecord -> ErrorT e m ()

Logging m => Logging (ReaderT * r m)

Methods

consumeLogRecord :: LogRecord -> ReaderT * r m ()

Logging m => Logging (ContT * r m)

Methods

consumeLogRecord :: LogRecord -> ContT * r m ()

(Monoid w, Logging m) => Logging (RWST r w s m)

Methods

consumeLogRecord :: LogRecord -> RWST r w s m ()

(Monoid w, Logging m) => Logging (RWST r w s m)

Methods

consumeLogRecord :: LogRecord -> RWST r w s m ()

data LogLevel

Constructors

TRACE

DEBUG

INFO

WARN

ERROR

Instances

Bounded LogLevel

Methods

minBound :: LogLevel

maxBound :: LogLevel

Enum LogLevel

Methods

succ :: LogLevel -> LogLevel

pred :: LogLevel -> LogLevel

toEnum :: Int -> LogLevel

fromEnum :: LogLevel -> Int

enumFrom :: LogLevel -> [LogLevel]

enumFromThen :: LogLevel -> LogLevel -> [LogLevel]

enumFromTo :: LogLevel -> LogLevel -> [LogLevel]

enumFromThenTo :: LogLevel -> LogLevel -> LogLevel -> [LogLevel]

Eq LogLevel

Methods

(==) :: LogLevel -> LogLevel -> Bool

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

Ord LogLevel

Methods

compare :: LogLevel -> LogLevel -> Ordering

(<) :: LogLevel -> LogLevel -> Bool

(<=) :: LogLevel -> LogLevel -> Bool

(>) :: LogLevel -> LogLevel -> Bool

(>=) :: LogLevel -> LogLevel -> Bool

max :: LogLevel -> LogLevel -> LogLevel

min :: LogLevel -> LogLevel -> LogLevel

Read LogLevel

Methods

readsPrec :: Int -> ReadS LogLevel

readList :: ReadS [LogLevel]

readPrec :: ReadPrec LogLevel

readListPrec :: ReadPrec [LogLevel]

Show LogLevel

Methods

showsPrec :: Int -> LogLevel -> ShowS

show :: LogLevel -> String

showList :: [LogLevel] -> ShowS