Module: ActionSubscriber::MarchHare::Subscriber

Includes:
Logging
Included in:
RouteSet
Defined in:
lib/action_subscriber/march_hare/subscriber.rb

Instance Method Summary collapse

Methods included from Logging

initialize_logger, logger, #logger, logger=

Instance Method Details

#auto_pop! ⇒ Object 



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# File 'lib/action_subscriber/march_hare/subscriber.rb', line 16

def auto_pop!
  # Because threadpools can be large we want to cap the number
  # of times we will pop each time we poll the broker
  times_to_pop = [::ActionSubscriber::Threadpool.ready_size, ::ActionSubscriber.config.times_to_pop].min
  times_to_pop.times do
    subscriptions.each do |subscription|
      route = subscription[:route]
      queue = subscription[:queue]
      # Handle busy checks on a per threadpool basis
      next if route.threadpool.busy?

      metadata, encoded_payload = queue.pop(route.queue_subscription_options)
      next unless encoded_payload
      ::ActiveSupport::Notifications.instrument "popped_event.action_subscriber", :payload_size => encoded_payload.bytesize, :queue => queue.name
      properties = {
        :action => route.action,
        :content_type => metadata.content_type,
        :delivery_tag => metadata.delivery_tag,
        :exchange => metadata.exchange,
        :headers => _normalized_headers(metadata),
        :message_id => metadata.message_id,
        :routing_key => metadata.routing_key,
        :queue => queue.name,
      }
      env = ::ActionSubscriber::Middleware::Env.new(route.subscriber, encoded_payload, properties)
      enqueue_env(route.threadpool, env)
    end
  end

rescue ::MarchHare::ChannelAlreadyClosed => e
  # The connection has gone down, we can just try again on the next pop
end

#auto_subscribe! ⇒ Object 



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# File 'lib/action_subscriber/march_hare/subscriber.rb', line 49

def auto_subscribe!
  subscriptions.each do |subscription|
    route = subscription[:route]
    queue = subscription[:queue]
    queue.channel.prefetch = route.prefetch if route.acknowledgements?
    consumer = queue.subscribe(route.queue_subscription_options) do |metadata, encoded_payload|
      ::ActiveSupport::Notifications.instrument "received_event.action_subscriber", :payload_size => encoded_payload.bytesize, :queue => queue.name
      properties = {
        :action => route.action,
        :channel => queue.channel,
        :content_type => metadata.content_type,
        :delivery_tag => metadata.delivery_tag,
        :exchange => metadata.exchange,
        :headers => _normalized_headers(metadata),
        :message_id => metadata.message_id,
        :routing_key => metadata.routing_key,
        :queue => queue.name,
      }
      env = ::ActionSubscriber::Middleware::Env.new(route.subscriber, encoded_payload, properties)
      run_env(env)
    end

    march_hare_consumers << consumer
  end
end

#cancel_consumers! ⇒ Object 



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# File 'lib/action_subscriber/march_hare/subscriber.rb', line 6

def cancel_consumers!
  march_hare_consumers.each(&:cancel)
end

#create_queue(channel, queue_name, queue_options) ⇒ Object 



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# File 'lib/action_subscriber/march_hare/subscriber.rb', line 10

def create_queue(channel, queue_name, queue_options)
  queue = ::MarchHare::Queue.new(channel, queue_name, queue_options)
  queue.declare!
  queue
end

#march_hare_consumers ⇒ Object 



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# File 'lib/action_subscriber/march_hare/subscriber.rb', line 75

def march_hare_consumers
  @march_hare_consumers ||= []
end