Asynchronous, Reactive Programming for Scala and Scala.js.
Monix is a high-performance Scala / Scala.js library for composing asynchronous, event-based programs.
It started as a proper implementation of ReactiveX, with stronger functional programming influences and designed from the ground up for back-pressure and made to interact cleanly with Scala's standard library, compatible out-of-the-box with the Reactive Streams protocol. It then expanded to include abstractions for suspending side effects and for resource handling, and is one of the parents and implementors of Cats Effect.
A Typelevel project, Monix proudly exemplifies pure, typeful, functional programming in Scala, while being pragmatic, and making no compromise on performance.
- exposes the kick-ass Observable, Iterant, Task, IO[E, A], and Coeval data types, along with all the support they need
- modular, split into multiple sub-projects, only use what you need
- designed for true asynchronicity, running on both the JVM and Scala.js
- excellent test coverage, code quality, and API documentation as a primary project policy
- Use monix-jvm-app-template.g8 for quickly getting started with a Monix-driven app
- See monix-sample for a project exemplifying Monix used both on the server and on the client.
Library dependency (sbt)
For the stable release (compatible with Cats, and Cats-Effect 2.x):
libraryDependencies += "io.monix" %% "monix" % "3.4.0"
Monix 3.x is modular by design. See the sub-modules graph:
You can pick and choose:
monix-executionexposes the low-level execution environment, or more precisely
Futurebased abstractions from
monix-catnapexposes pure abstractions built on top of the Cats-Effect type classes; depends on
monix-execution, Cats 1.x and Cats-Effect
Coeval; depends on
Observablefor modeling reactive, push-based streams with back-pressure; depends on
Iterantstreams for purely functional pull based streaming; depends on
monix-evaland makes heavy use of Cats-Effect
monixprovides all of the above
The Monix project welcomes contributions from anybody wishing to participate. You must license all code or documentation provided with the Apache License 2.0, see LICENSE.txt.
You must follow the Scala Code of Conduct when discussing Monix on GitHub, 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.
If you'd like to donate in order to help with ongoing maintenance:
Here's a (non-exhaustive) list of companies that use Monix in production. Don't see yours? Submit a PR
- E.ON Connecting Energies
- eBay Inc.
- Sony Electronics
All code in this repository is licensed under the Apache License, Version 2.0. See LICENCE.txt.