log

A library that provides a way to record structured log messages with multiple back ends.

Supported back ends:

• Standard output
• Elasticsearch
• PostgreSQL

The log library provides Elasticsearch and PostgreSQL back ends. If you only need one of those, use log-base and log-elasticsearch or log-postgres.

Example

{-# LANGUAGE OverloadedStrings #-}

module Main where

import Log
import Log.Backend.ElasticSearch.V5

import System.Random

main :: IO ()
main = do
  let config = defaultElasticSearchConfig {
        esServer  = "http://localhost:9200",
        esIndex   = "logs",
        esMapping = "log"
        }
  withElasticSearchLogger config randomIO $ \logger ->
    runLogT "main" logger $ do
      logTrace_ "foo"