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Channels & concurrency 2013 (c) Alexey Kachayev

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Channels Idea

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Idea •Hoare’s CSP •Erlang / Limbo / etc •Transport level •File name / File descriptor •Message Box / Queue

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Channels Go(lang)

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Go

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Go (1)

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Go (2)

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Go (2) fan-out fan-in timeout

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Channels Clojure

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Clojure Alexey Kachayev, https://gist.github.com/kachayev/3146759

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Clojure

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Clojure

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Clojure

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Clojure Michael Peterson, https://github.com/midpeter444/go-lightly

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Clojure

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Clojure core.async

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Idea •Library (just) •(chan) •Blocking •Buffers •(go) macros •Deadlocks (?!?)

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Clojure

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Clojure

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Channels dig deeper

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Why? •Streams •Decoupling •Composability •Patterns

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Channels Concurrent ML

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CML

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Channels Erlang & composability

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Channels: Erlang https://gist.github.com/kachayev/5426175

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Idea •map •filter •fork •zip, zipwith •take, drop •etc

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Erlang

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Erlang

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Erlang

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Erlang futures?

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Erlang

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Erlang

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Channels Scala & Eventsourced

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Scala

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Scala channel

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Channels Cloud Haskell & Types

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Haskell

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Haskell channel

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Contacts twi: @kachayev github: @kachayev work: attendify.com