Class: BarnyardMarket::ProcessSubscriptions

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

Instance Method Summary collapse

Constructor Details

#initialize(args) ⇒ ProcessSubscriptions

Returns a new instance of ProcessSubscriptions.



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# File 'lib/barnyard_market.rb', line 12

def initialize(args)

  @debug = args.fetch(:debug) { false }
  @log = args.fetch(:logger) { Logger.new(STDOUT) }

  @sqs_settings = args.fetch(:sqs_settings) { raise "You must provide :sqs_settings" }
  @dynamodb_settings = args.fetch(:dynamodb_settings) { raise "You must provide :dynamodb_settings" }
  @cachecow_settings = args.fetch(:cachecow_settings) { raise "You must provide :cachecow_settings" }

  @cachecow = BarnyardCcfeeder::CacheCow.new(@cachecow_settings)

  @sqs = AWS::SQS.new(@sqs_settings)

  @farmer_queue = @sqs.queues.create("barnyard-farmer")
  @transaction_queue = @sqs.queues.create("barnyard-transactions")

  deliver_subscriptions
end

Instance Method Details

#deliver_subscriptions ⇒ Object 



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# File 'lib/barnyard_market.rb', line 32

def deliver_subscriptions

  count = 0

  while (msg = @farmer_queue.receive_message) do

    count += 1

    payload = Crack::JSON.parse(msg.body)

    @log.info "#{count} Received #{payload["transaction_type"].upcase} for crop #{payload["crop_number"]}"

    subscribed = @cachecow.has_subscribers(payload["crop_number"])

    @log.info "#{subscribed.count} subscriptions for crop #{payload["crop_number"]}"

    subscribed.each do |subscription|

      queue_name = "barnyard-transactions-subscriber-#{subscription["subscriber"]["id"]}-crop-#{subscription["crop"]["crop_number"]}"
      queue = @sqs.queues.create(queue_name)

      payload["subscription_id"] = subscription["id"]
      payload["transaction_uuid"] = UUID.new.generate

      @log.info "Sending message for change #{payload["change_uuid"]} to queue #{queue_name}"
      json_payload = payload.to_json
      queue.send_message(json_payload)
      @transaction_queue.send_message(json_payload)
    end

    msg.delete

  end

end