Contents

module Alondra
  class EventRouter

    def self.listeners
      @listeners ||= []
    end

    def process(event)
      event.channel.receive(event)

      # Event listeners callback can manipulate AR objects and so can potentially
      # block the EM reactor thread. To avoid that, we defer them to another thread.
      EM.defer do

        # Ensure the connection associated with the thread is checked in
        # after the callbacks are processed
        ActiveRecord::Base.connection_pool.with_connection do
          listening_classes = EventRouter.listeners.select do |ob|
            ob.listen_to?(event.channel_name)
          end

          listening_classes.each { |listening_class| listening_class.process(event) }
        end
      end
    end
  end
end

Version data entries

4 entries across 4 versions & 1 rubygems

Version	Path
alondra-0.1.1	lib/alondra/event_router.rb
alondra-0.1.0	lib/alondra/event_router.rb
alondra-0.0.4	lib/alondra/event_router.rb
alondra-0.0.3	lib/alondra/event_router.rb