Class: WebFunction::Pipeline

Inherits:
Object
  • Object
show all
Defined in:
lib/web_function/pipeline.rb

Instance Method Summary collapse

Constructor Details

#initialize(url) ⇒ Pipeline 



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# File 'lib/web_function/pipeline.rb', line 3

def initialize(url)
  @url = url
  @steps = []
  @promises = []
end

Instance Method Details

#add_step(step) ⇒ Object 



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# File 'lib/web_function/pipeline.rb', line 9

def add_step(step)
  n = @promises.count
  promise = Promise.new(self, "$[#{n}]")

  @steps << step
  @promises << promise

  promise
end

#execute(returns: :all) ⇒ Object 



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# File 'lib/web_function/pipeline.rb', line 19

def execute(returns: :all)
  case returns
  when :all
    responses = Endpoint.invoke(@url, args: {
      steps: @steps,
      returns: "$",
    })

    responses.each_with_index do |response, index|
      @promises[index].value = response
    end

    reset!

    responses
  when :last
    response = Endpoint.invoke(@url, args: {
      steps: @steps,
      returns: "$[-1:]",
    })

    @promises.last.value = response

    reset!

    response
  else
    response = Endpoint.invoke(@url, args: {
      steps: @steps,
      returns: returns,
    })

    reset!

    response
  end
end

#reset! ⇒ Object 



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# File 'lib/web_function/pipeline.rb', line 57

def reset!
  @steps = []
  @promises = []
end