FS2 (“Functional Streams for Scala”) is a purely functional, effectful abstraction for stream processing on the JVM. Built on Cats Effect, it enables compositional resource-safe streaming workflows with robust error handling, back-pressure, pull/push semantics, and support for concurrent and interruptible pipelines.

Features

  • Purely functional streams with Cats Effect integration
  • Safe resource acquisition and disposal using compile-time guarantees
  • Composable concurrent pipelines with back-pressure support
  • Pull/homeostasis and push models unified in a single API
  • Support for streaming connectors (e.g. HTTP via fs2-http, RabbitMQ, MQTT)
  • Designed for efficient Scala code on both Scala 2 & Scala 3

Project Samples

FS2 Screenshot 1

Project Activity

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Categories

Libraries

License

MIT License

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FS2 Web Site

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Additional Project Details

Programming Language

Scala

Related Categories

Scala Libraries

Registered

2025-08-04
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