Control.Eff.LogWriter.DebugTrace

This helps to setup logging via Debug.Trace.

Documentation

withTraceLogWriter :: IoLogging e => Eff e a -> Eff e a

Enable logging via traceM using the debugTraceLogWriter. The logging monad type can be any type with a Monad instance.

Log messages are rendered using renderLogMessageConsoleLog.

Example:

exampleWithTraceLogWriter :: IO ()
exampleWithTraceLogWriter =
    runLift
  $ withoutLogging @IO
  $ withTraceLogWriter
  $ logInfo "Oh, hi there"

withTraceLogging

Arguments

:: Lifted IO e

=> Text

The default application name to put into the lmAppName field.

-> Facility

The default RFC-5424 facility to put into the lmFacility field.

-> LogPredicate

The inital predicate for log messages, there are some pre-defined in Control.Eff.Log.Message

-> Eff (Logs ': (LogWriterReader ': e)) a

-> Eff e a

Enable logging via traceM using the debugTraceLogWriter, with some LogMessage fields preset as in withRichLogging.

Log messages are rendered using renderLogMessageConsoleLog.

Example:

exampleWithTraceLogging :: IO ()
exampleWithTraceLogging =
    runLift
  $ withTraceLogging "my-app" local7 allLogMessages
  $ logInfo "Oh, hi there"

debugTraceLogWriter :: LogMessageTextRenderer -> LogWriter

Write LogMessages via traceM.