https://github.com/cotag/em-promise

A promise/deferred implementation for EventMachine
https://github.com/cotag/em-promise

Last synced: about 1 year ago
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A promise/deferred implementation for EventMachine

• Host: GitHub
• URL: https://github.com/cotag/em-promise
• Owner: cotag
• License: mit
• Created: 2012-10-20T01:18:25.000Z (over 13 years ago)
• Default Branch: master
• Last Pushed: 2013-03-21T00:27:57.000Z (over 13 years ago)
• Last Synced: 2025-04-11T22:12:37.379Z (about 1 year ago)
• Language: Ruby
• Homepage:
• Size: 163 KB
• Stars: 21
• Watchers: 3
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.textile
  • License: MIT-LICENSE

Awesome Lists containing this project

README

          
h1. EM-Promise

!https://secure.travis-ci.org/cotag/em-promise.png(Build Status)!:https://travis-ci.org/cotag/em-promise

A promise / deferred implementation for EventMachine inspired by "AngularJS":http://docs.angularjs.org/api/ng.$q / "Kris Kowal's Q.":https://github.com/kriskowal/q

From the perspective of dealing with error handling, deferred and promise apis are to asynchronous programing what try, catch and throw keywords are to synchronous programming.



require 'rubygems'

require 'em-promise'


def asyncGreet(name)

	deferred = EM::Q.defer

	

	EM::Timer.new(5) do

		EM.defer do

			deferred.resolve("Hello #{name}")

		end

	end

	

	deferred.promise

end

EventMachine.run do

	asyncGreet('Robin Hood').then(proc { |greeting|

		p "Success: #{greeting}"

	}, proc { |reason|

		p "Failed: #{reason}"

	})

	

	asyncGreet('The Dude').then do |greeting|

		p "Jeff '#{greeting}' Lebowski"

	end

	

end



h2. Start using it now

# Read the "Documentation":http://rubydoc.info/gems/em-promise/EventMachine/Q

# Then @gem install em-promise@