Class: Fairway::Sidekiq::BasicFetch

Inherits:
Sidekiq::BasicFetch
  • Object
show all
Defined in:
lib/fairway/sidekiq/basic_fetch.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options) ⇒ BasicFetch

Returns a new instance of BasicFetch.



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# File 'lib/fairway/sidekiq/basic_fetch.rb', line 6

def initialize(options)
  @queues = options[:queues].map { |q| "queue:#{q}" }
end

Instance Attribute Details

#queues ⇒ Object (readonly)

Returns the value of attribute queues.



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# File 'lib/fairway/sidekiq/basic_fetch.rb', line 4

def queues
  @queues
end

Instance Method Details

#queues_cmd ⇒ Object 



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# File 'lib/fairway/sidekiq/basic_fetch.rb', line 42

def queues_cmd
  @queues.shuffle.uniq
end

#retrieve_work(options = {}) ⇒ Object 



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# File 'lib/fairway/sidekiq/basic_fetch.rb', line 10

def retrieve_work(options = {})
  options = { blocking: true }.merge(options)

  ::Sidekiq.logger.debug "#{self.class.name}#retrieve_work #{queues_cmd}"

  work = ::Sidekiq.redis do |conn|
    script = <<-SCRIPT
      for i = 1, #KEYS do
        local work = redis.call('rpop', KEYS[i]);

        if work then
          return {KEYS[i], work};
        end
      end

      return nil;
    SCRIPT

    conn.eval(script, queues_cmd)
  end

  if (work)
    ::Sidekiq.logger.debug "#{self.class.name}#retrieve_work got work"
    work = UnitOfWork.new(*work)
  else
    ::Sidekiq.logger.debug "#{self.class.name}#retrieve_work got nil"
    sleep 1 if options[:blocking]
  end

  work
end