Asynchronous, Reactive Programming for Scala and Scala.js.
Monix is a high-performance Scala / Scala.js library for composing asynchronous and event-based programs using observable sequences that are exposed as asynchronous streams, expanding on the observer pattern, strongly inspired by ReactiveX, but designed from the ground up for back-pressure and made to cleanly interact with Scala’s standard library and compatible out-of-the-box with the Reactive Streams protocol.
- exposes the kick-ass
- modular, only use what you need
- the core has no third-party dependencies
- strives to be idiomatic Scala and encourages referential transparency, but is built to be faster than alternatives
- accepted in the Typelevel incubator
- designed for true asynchronicity, running on both the JVM and Scala.js,
- really good test coverage and API documentation as a project policy
See monix-sample for a project exemplifying Monix used both on the server and on the client.
The packages are published on Maven Central.
- Current stable release:
- Old 1.x release (Monifu):
For the current stable release (use the
%%% for Scala.js):
libraryDependencies += "io.monix" %% "monix" % "2.1.0"
For the old 1.x release (use the
%%% for Scala.js):
libraryDependencies += "org.monifu" %% "monifu" % "1.2"
Monix 2.x is modular by design, so you can pick and choose:
monix-typesexposes type-classes and shims needed for integration with other FP libraries (Cats, Scalaz)
monix-executionexposes the low-level execution environment, or more precisely
Coevaland depends on
Observablestreams and depends on
monixprovides all of the above
monix-catsprovides integration with Cats and depends on
monix-scalaz-72provides integration with Scalaz and depends on
NOTE: The documentation is a work in progress. All documentation is hosted at, contributions are welcome:
- Monix Task: Lazy, Async & Awesome, flatMap(Oslo), 2016
- Akka & Monix: Controlling Power Plants, Typelevel Summit, Oslo, 2016
The current maintainers (people who can help you) are:
The Monix project welcomes contributions from anybody wishing to participate. All code or documentation that is provided must be licensed with the same license that Monix is licensed with (Apache 2.0, see LICENSE.txt).
People are expected to follow the Typelevel Code of Conduct when discussing Monix on the Github page, Gitter channel, or other venues.
Feel free to open an issue if you notice a bug, have an idea for a feature, or have a question about the code. Pull requests are also gladly accepted. For more information, check out the contributor guide.
All code in this repository is licensed under the Apache License, Version 2.0. See LICENCE.txt.
YourKit supports the Monix project with its full-featured Java Profiler. YourKit, LLC is the creator YourKit Java Profiler and YourKit .NET Profiler, innovative and intelligent tools for profiling Java and .NET applications.
Development of Monix has been initiated by Eloquentix engineers, with Monix being introduced at E.ON Connecting Energies, powering the next generation energy grid solutions.