Method: Bunny::Queue#subscribe

Defined in:
lib/bunny/queue.rb

#subscribe(opts = { :consumer_tag => @channel.generate_consumer_tag, :manual_ack => false, :exclusive => false, :block => false, :on_cancellation => nil }, &block) ⇒ Object

Adds a consumer to the queue (subscribes for message deliveries).

Parameters:

  • opts (Hash) (defaults to: { :consumer_tag => @channel.generate_consumer_tag, :manual_ack => false, :exclusive => false, :block => false, :on_cancellation => nil }) —

    Options

Options Hash (opts):

  • :ack (Boolean) — default: false —

    [DEPRECATED] Use :manual_ack instead

  • :manual_ack (Boolean) — default: false —

    Will this consumer use manual acknowledgements?

  • :exclusive (Boolean) — default: false —

    Should this consumer be exclusive for this queue?

  • :on_cancellation (#call) —

    Block to execute when this consumer is cancelled remotely (e.g. via the RabbitMQ Management plugin)

  • :consumer_tag (String) —

    Unique consumer identifier. It is usually recommended to let Bunny generate it for you.

  • :arguments (Hash) — default: {} —

    Additional (optional) arguments, typically used by RabbitMQ extensions

See Also:



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# File 'lib/bunny/queue.rb', line 195

def subscribe(opts = {
                :consumer_tag    => @channel.generate_consumer_tag,
                :manual_ack      => false,
                :exclusive       => false,
                :block           => false,
                :on_cancellation => nil
              }, &block)

  unless opts[:ack].nil?
    warn "[DEPRECATION] `:ack` is deprecated.  Please use `:manual_ack` instead."
    opts[:manual_ack] = opts[:ack]
  end

  ctag       = opts.fetch(:consumer_tag, @channel.generate_consumer_tag)
  consumer   = Consumer.new(@channel,
                            self,
                            ctag,
                            !opts[:manual_ack],
                            opts[:exclusive],
                            opts[:arguments])

  consumer.on_delivery(&block)
  consumer.on_cancellation(&opts[:on_cancellation]) if opts[:on_cancellation]

  @channel.basic_consume_with(consumer)
  if opts[:block]
    # joins current thread with the consumers pool, will block
    # the current thread for as long as the consumer pool is active
    @channel.work_pool.join
  end

  consumer
end