class EbDeployer::EventPoller

Constants

POLL_INTERVAL

Public Class Methods

new(event_source) click to toggle source
# File lib/eb_deployer/event_poller.rb, line 6
def initialize(event_source)
  @event_source = event_source
end

Public Instance Methods

get_anchor() click to toggle source
# File lib/eb_deployer/event_poller.rb, line 10
def get_anchor
  @event_source.get_anchor
end
poll(from_anchor) { |event| ... } click to toggle source
# File lib/eb_deployer/event_poller.rb, line 14
def poll(from_anchor, &block)
  handled = Set.new
  loop do
    @event_source.fetch_events(from_anchor) do |events|
      # events from event source is latest first order
      to_be_handled = []
      reached_anchor = false

      events.each do |event|
        if digest(event) == digest(from_anchor)
          reached_anchor = true
        end

        if !handled.include?(digest(event)) && !reached_anchor
          to_be_handled << event
        end
      end

      to_be_handled.reverse.each do |event|
        yield(event)
        handled << digest(event)
      end

      !reached_anchor
    end
    sleep POLL_INTERVAL
  end
end

Private Instance Methods

digest(event) click to toggle source
# File lib/eb_deployer/event_poller.rb, line 45
def digest(event)
  return nil unless event
  event = event.to_h if event.respond_to?(:to_h)
  JSON.dump(event)
end