System.Logger

This module re-exports the logger interface from System.Logger.Types and the implementation of that interface from System.Logger.Logger and System.Logger.Backend.Handle.

Documentation

withConsoleLogger :: (MonadIO m, MonadBaseControl IO m) => LogLevel -> LoggerT Text m α -> m α

A simple console logger

import System.Logger

main ∷ IO ()
main = withConsoleLogger Info $ do
    logg Info "moin"
    withLabel ("function", "f") f
    logg Warn "tschüss"
  where
    f = withLevel Debug $ do
        logg Debug "debug f"

withFileLogger :: (MonadIO m, MonadBaseControl IO m) => FilePath -> LogLevel -> LoggerT Text m α -> m α

A simple file logger

Logger Interface

module System.Logger.Types

Yet Another Logger

module System.Logger.Logger

Handle Backend

module System.Logger.Backend.Handle

Logging System Configuration

data LogConfig

Constructors

LogConfig

Fields

_logConfigLogger :: !LoggerConfig

_logConfigBackend :: !HandleBackendConfig

Instances

Eq LogConfig

Ord LogConfig

Read LogConfig

Show LogConfig

Generic LogConfig

ToJSON LogConfig

Typeable * LogConfig

FromJSON (LogConfig -> LogConfig)

type Rep LogConfig

logConfigLogger :: Lens' LogConfig LoggerConfig

logConfigBackend :: Lens' LogConfig HandleBackendConfig

defaultLogConfig :: LogConfig

validateLogConfig :: ConfigValidation LogConfig []

pLogConfig :: MParser LogConfig