System.Log.FastLogger

Creating a logger set

type BufSize = Int

The type for buffer size of each core.

defaultBufSize :: BufSize

The default buffer size (4,096 bytes).

logOpen :: FilePath -> IO FD

Opening a log file.

data LoggerSet

A set of loggers. The number of loggers is the capabilities of GHC RTS. You can specify it with "+RTS -N<x>". A buffer is prepared for each capability.

newLoggerSet :: BufSize -> FD -> IO LoggerSet

Creating a new LoggerSet.

renewLoggerSet :: LoggerSet -> FD -> IO ()

Renewing FD in LoggerSet. Old FD is closed.

Removing a logger set

rmLoggerSet :: LoggerSet -> IO ()

Flushing the buffers, closing FD and freeing the buffers.

Log messages

data LogStr

Log message builder. Use (<>) to append two LogStr in O(1).

Instances

IsString LogStr

Monoid LogStr

ToLogStr LogStr

class ToLogStr msg where

Methods

toLogStr :: msg -> LogStr

Instances

ToLogStr String

ToLogStr Text

ToLogStr Text

ToLogStr ByteString

ToLogStr ByteString

ToLogStr LogStr

logStrLength :: LogStr -> Int

Obtaining the length of LogStr.

logStrBuilder :: LogStr -> Builder

Obtaining the Builder of LogStr.

Writing a log message

pushLogStr :: LoggerSet -> LogStr -> IO ()

Writing a log message to the corresponding buffer.

Flushing buffered log messages

flushLogStr :: LoggerSet -> IO ()

Flushing log messages in buffers.

File rotation

module System.Log.FastLogger.File