Class: Q::Promise

Inherits:
Object
  • Object
show all
Defined in:
lib/q/promise.rb

Instance Method Summary collapse

Constructor Details

#initialize(defer) ⇒ Promise

Returns a new instance of Promise.



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# File 'lib/q/promise.rb', line 2

def initialize(defer)
  @defer = defer

  @thens = []
  @fails = []
  @alwayses = []
end

Instance Method Details

#always(&block) ⇒ Object 



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# File 'lib/q/promise.rb', line 18

def always(&block)
  enqueue_and_call(@alwayses, block, :finished?)
end

#fail(&block) ⇒ Object 



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# File 'lib/q/promise.rb', line 14

def fail(&block)
  enqueue_and_call(@fails, block, :rejected?)
end

#fulfill(type, result) ⇒ Object 



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# File 'lib/q/promise.rb', line 22

def fulfill(type, result)
  @result = result

  if type == :resolved
    @thens.each { |callback| callback.call(@result) }
  elsif type == :rejected
    @fails.each { |callback| callback.call(@result) }
  end

  @alwayses.each { |callback| callback.call(@result) }
end

#then(&block) ⇒ Object 



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# File 'lib/q/promise.rb', line 10

def then(&block)
  enqueue_and_call(@thens, block, :resolved?)
end