BSD-3-Clause licensed by Scrive AB
This version can be pinned in stack with:log-base-0.12.1.0@sha256:84f761eee4f60aadbbc7925754550684c0d9bdba714d0c1321be845d9a77a183,2758
Module documentation for 0.12.1.0
Depends on 16 packages
(full list with versions):
aeson,
aeson-pretty,
base,
bytestring,
deepseq,
exceptions,
mmorph,
monad-control,
mtl,
semigroups,
stm,
text,
time,
transformers-base,
unliftio-core,
unordered-containers log
A set of libraries that provide a way to record structured log messages with
multiple backends.
Supported backends:
Example
A sample usage for logging to both standard output and Elasticsearch:
{-# LANGUAGE OverloadedStrings #-}
module Main where
import Log
import Log.Backend.ElasticSearch
import Log.Backend.StandardOutput
main :: IO ()
main = do
let config = defaultElasticSearchConfig
{ esServer = "http://localhost:9200"
, esIndex = "logs"
}
withStdOutLogger $ \stdoutLogger -> do
withElasticSearchLogger config $ \esLogger -> do
runLogT "main" (stdoutLogger <> esLogger) defaultLogLevel $ do
logInfo_ "Hi there"
log-base-0.12.1.0 (2025-06-26)
- Add utility function to log unhandled exceptions.
log-base-0.12.0.1 (2023-03-14)
log-base-0.12.0.0 (2022-09-21)
- Deprecate
withSimpleStdOutLogger as it’s broken in multithreaded environments.
- Generalize logger related functions to
MonadUnliftIO.
- Remove redundant
INLINE pragmas.
log-base-0.11.1.0 (2022-04-04)
- Add support for aeson 2.0.1.0.
- Add support for GHC 9.2.
- Drop support for GHC < 8.8.
log-base-0.11.0.0 (2021-10-11)
- Add support for defining maximum log level.
log-base-0.10.0.1 (2021-07-29)
- Fix compilation issues caused by ambiguos occurence of
controlT.
log -base-0.10.0.0 (2021-06-09)
- Drop
MonadTime constraint and use system time by default.
log-base-0.9.1.1 (2021-05-28)
log-base-0.9.1.0 (2021-03-01)
log-base-0.9.0.0 (2020-09-07)
- Always make data attached to a log message a json object
- Add unliftio-core-0.2 compatiblity
- Tidy up flushing stdout in stdout loggers
- Use
simpleStdoutLogger in withSimpleStdOutLogger instead of stdoutLogger
- Remove deprecated functions
- Add JSON loggers
- Make
mkLogger use bounded queue internally (similar to mkBulkLogger)
- Get rid of a space leak in bounded queue used in
mkBulkLogger
log-base-0.8.0.1 (2020-05-08)
log-base-0.8.0.0 (2019-04-09)
- Add
getLoggerEnv function to MonadLog class, add getLoggerIO
utility (#46).
- Add a
MonadUnliftIO instance for LogT
(#47).
log-base-0.7.4.0 (2017-10-27)
log-base-0.7.3.0 (2017-10-10)
BasicStdOutLogger now flushes stdout on each write. BulkStdOutLogger
now flushes stdout on each bulk write (#38).
log-base-0.7.2.0 (2017-08-10)
- Add ‘MFunctor LogT’ instance (#35 ).
log-base-0.7.1.1 (2017-06-19)
- mkBulkLogger now uses a bounded queue to interact with the logger thread.
log-base-0.7.1 (2017-03-16)
- Added a few MTL class instances (#28).
log-base-0.7 (2016-11-25)
- Initial release (split from the log package).
- Improved documentation (#22).
- Implement ‘toEncoding’ directly in ‘ToJSON’ instances (#21).
