Module: Flapjack::Gateways::JSONAPI::Methods::Metrics

Defined in:
lib/flapjack/gateways/jsonapi/methods/metrics.rb

Class Method Summary collapse

Class Method Details

.registered(app) ⇒ Object

module Helpers end



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# File 'lib/flapjack/gateways/jsonapi/methods/metrics.rb', line 16

def self.registered(app)
  app.helpers Flapjack::Gateways::JSONAPI::Helpers::Headers
  app.helpers Flapjack::Gateways::JSONAPI::Helpers::Miscellaneous
  app.helpers Flapjack::Gateways::JSONAPI::Helpers::Resources
  # app.helpers Flapjack::Gateways::JSONAPI::Methods::Metrics::Helpers

  app.class_eval do

    swagger_path "/metrics" do
      operation :get do
        key :description, "Get metrics"
        key :operationId, "get_metrics"
        key :produces, [Flapjack::Gateways::JSONAPI.media_type_produced]
        parameter do
          key :name, :fields
          key :in, :query
          key :description, 'Comma-separated list of fields to return'
          key :required, false
          key :type, :string
        end
        response 200 do
          key :description, "GET metrics response"
          schema do
            key :'$ref', :data_Metrics
          end
        end
      end
    end
  end

  app.get %r{^/metrics$} do
    fields = params[:fields]
    fields = [fields] unless fields.nil? || fields.is_a?(Array)

    whitelist = Flapjack::Data::Metrics.jsonapi_methods[:get].attributes

    jsonapi_fields = if fields.nil?
      whitelist
    else
      Set.new(fields).keep_if {|f| whitelist.include?(f.to_sym) }.to_a
    end

    metrics = Flapjack::Data::Metrics.new
    result = Hash[ *(jsonapi_fields.collect{|f| [f, metrics.send(f.to_sym)]}.flatten) ]
    Flapjack.dump_json(:data => {
      :id => SecureRandom.uuid,
      :type => 'metrics',
      :attributes => result
    })
  end
end