New I/O for Ruby (nio4r): cross-platform asynchronous I/O primitives for scalable network clients and servers. Modeled after the Java NIO API, but simplified for ease-of-use.
nio4r provides an abstract, cross-platform stateful I/O selector API for Ruby. I/O selectors are the heart of "reactor"-based event loops, and monitor multiple I/O objects for various types of readiness, e.g. ready for reading or writing.
Projects using nio4r
- ActionCable: Rails 5 WebSocket protocol, uses nio4r for a WebSocket server
- Celluloid: Actor-based concurrency framework, uses nio4r for async I/O
- Async: Asynchronous I/O framework for Ruby
- Puma: Ruby/Rack web server built for concurrency
- Expose high-level interfaces for stateful IO selectors
- Keep the API small to maximize both portability and performance across many different OSes and Ruby VMs
- Provide inherently thread-safe facilities for working with IO objects
- libev: MRI C extension targeting multiple native IO selector APIs (e.g epoll, kqueue)
- Java NIO: JRuby extension which wraps the Java NIO subsystem
Kernel.select-based backend that should work on any Ruby interpreter
Please see the nio4r wiki for more detailed documentation and usage notes:
- Getting Started: Introduction to nio4r's components
Selectors: monitor multiple
IOobjects for readiness events
Monitors: control interests and inspect readiness for specific
- Byte Buffers: fixed-size native buffers for high-performance I/O
nio4r is not a full-featured event framework like EventMachine or Cool.io. Instead, nio4r is the sort of thing you might write a library like that on top of. nio4r provides a minimal API such that individual Ruby implementers may choose to produce optimized versions for their platform, without having to maintain a large codebase.
rake clean rake release
You might need to delete
Gemfile.lock before trying to
rake clean rake compile rake release
Released under the MIT license.
Copyright, 2019, by Tony Arcieri.
Copyright, 2019, by Samuel G. D. Williams.
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Released under the BSD license. See ext/libev/LICENSE for details.
Copyright, 2007-2019, by Marc Alexander Lehmann.