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https://github.com/taoensso/timbre

Pure Clojure/Script logging library
https://github.com/taoensso/timbre

clojure clojurescript epl logging slf4j taoensso

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Pure Clojure/Script logging library

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README 

        
Taoensso open source  

[**API**][codox docs] | [**Wiki**][GitHub wiki] | [Latest releases](#latest-releases) | [Slack channel][]



# Timbre



### Pure Clojure/Script logging library



Getting even the simplest Java logging working can be maddeningly complex, and it often gets worse at scale as your needs become more sophisticated.



Timbre offers an **all Clojure/Script** alternative that's fast, deeply flexible, easy to configure with pure Clojure data, and that **just works out the box**.



Supports optional interop with [tools.logging](../../wiki/4-Interop#toolslogging) and [Java logging via SLF4Jv2](../../wiki/4-Interop#java-logging).



## Library status



While I will continue to support Timbre as always, I'd recommend new users see [Telemere](https://www.taoensso.com/telemere) instead - which is essentially a **modern rewrite of Timbre**.



There's **zero pressure** for existing users of Timbre to migrate, though there are significant benefits - and migration is often [quick and easy](https://github.com/taoensso/telemere/wiki/5-Migrating#from-timbre). See [here](https://github.com/taoensso/telemere/wiki/6-FAQ#why-not-just-update-timbre) for why I made the decision to release a new library.



\- Peter Taoussanis



## Latest release/s



- `2024-10-30` `v6.6.1`: [release info](../../releases/tag/v6.6.1)



[![Main tests][Main tests SVG]][Main tests URL]

[![Graal tests][Graal tests SVG]][Graal tests URL]



See [here][GitHub releases] for earlier releases.



## Why Timbre?



- Full **Clojure** & **ClojureScript** support, with built-in appenders for both

- **A single, simple config map**, and you're set. No need for XML or properties files

- Simple `(fn [data]) -> ?effects` appenders, and `(fn [data]) -> ?data` middleware

- Easily save **raw logging arguments** to the DB of your choice

- Easily filter logging calls by **any combination** of: level, namespace, appender

- **Zero overhead** compile-time level/ns elision

- Powerful, easy-to-configure **rate limits** and **async logging**

- **Great performance** and flexibility at any scale

- Small, simple, cross-platform pure-Clojure codebase



## Documentation



- [Wiki][GitHub wiki] (getting started, usage, etc.)

- API reference: [Codox][Codox docs]



## Funding



You can [help support][sponsor] continued work on this project, thank you!! 🙏



## License



Copyright © 2014-2024 [Peter Taoussanis][].  

Licensed under [EPL 1.0](LICENSE.txt) (same as Clojure).



[GitHub releases]: ../../releases

[GitHub issues]:   ../../issues

[GitHub wiki]:     ../../wiki

[Slack channel]: https://www.taoensso.com/timbre/slack



[Peter Taoussanis]: https://www.taoensso.com

[sponsor]:          https://www.taoensso.com/sponsor



[Codox docs]:  https://taoensso.github.io/timbre/

[cljdoc docs]: https://cljdoc.org/d/com.taoensso/timbre/CURRENT/api/taoensso.timbre



[Clojars SVG]: https://img.shields.io/clojars/v/com.taoensso/timbre.svg

[Clojars URL]: https://clojars.org/com.taoensso/timbre



[Main tests SVG]:  https://github.com/taoensso/timbre/actions/workflows/main-tests.yml/badge.svg

[Main tests URL]:  https://github.com/taoensso/timbre/actions/workflows/main-tests.yml

[Graal tests SVG]: https://github.com/taoensso/timbre/actions/workflows/graal-tests.yml/badge.svg

[Graal tests URL]: https://github.com/taoensso/timbre/actions/workflows/graal-tests.yml