EventMachine Yes, that’s NodeJS in Ruby

Jonathan Weiss 02.07.2010

EventMachine

„Event-driven I/O using the reactor pattern“

http://rubyeventmachine.com/

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Goals

Scalable and performant but low-level I/O library

API that removes threaded complexety

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Install

$ sudo gem install eventmachine

Works with Ruby, Rubinius, and JRuby

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Use EventMachine

$ sudo gem install eventmachine

Works with Ruby, Rubinius, and JRuby

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Echo Server

$ sudo gem install eventmachine

Works with Ruby, Rubinius, and JRuby

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Low Level HTTP Client

$ sudo gem install eventmachine

Works with Ruby, Rubinius, and JRuby

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EM::HttpRequest

$ sudo gem install eventmachine

Works with Ruby, Rubinius, and JRuby

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Simple Timer

$ sudo gem install eventmachine

Works with Ruby, Rubinius, and JRuby

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Simple Timer

$ sudo gem install eventmachine

Works with Ruby, Rubinius, and JRuby

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Protocol Support

TCP (+ SSL)

HTTP(s) / WebSocket

Memcached

SASLauth

Postgres3

SMTP

Sock4

Stomp

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FileWatcher

Timer

PeriodicTimer

ProcessWatch

SpawnedProcess

Queue

Higher Level APIs on top

AMQP

Nanite

MySQL

DNS

Redis

MongoDB

HTTPRequest

WebSocket

Amazon S3 12

Happening: S3 + EventMachine

$ sudo gem install eventmachine

Works with Ruby, Rubinius, and JRuby

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Why you want async:

Uploading 100 x 2 MB files:

RightAWS vs. Happening

10min vs. 5:40min

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EventMachine vs. NodeJS

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EventMachine NodeJS

Engine Ruby V8

Available Libraries All Ruby libs, gems, … Only NodeJS libs

Possibility to block YES NO

Coding Style Callbacks, Procedural with fibers

Callbacks

EM::Synchrony – 1.9 Fibers

$ sudo gem install eventmachine

Works with Ruby, Rubinius, and JRuby

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