Class: BBQueue::Consumer

Inherits:
Object
  • Object
show all
Defined in:
lib/bbqueue/consumer.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(queue_names, options = {}) ⇒ Consumer

Returns a new instance of Consumer.



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# File 'lib/bbqueue/consumer.rb', line 45

def initialize(queue_names, options = {})
  self.logger = logger = options[:logger] || BBQueue::NullLogger.new

  consumer = self

  Stalking::Consumer.new options.merge(:logger => BBQueue::FatalLogger.new(logger)) do
    Array(queue_names).each do |queue_name|
      job queue_name do |args|
        consumer.work BBQueue::Serializer.load(args["object"]), queue_name
      end
    end

    before do |queue_name, args|
      logger.info "Job #{BBQueue::Serializer.load(args["object"]).inspect} on #{queue_name.inspect} started"
    end

    after do |queue_name, args|
      logger.info "Job #{BBQueue::Serializer.load(args["object"]).inspect} on #{queue_name.inspect} finished"
    end

    error do |e, queue_name, args|
      logger.error "Job #{BBQueue::Serializer.load(args["object"]).inspect} on #{queue_name.inspect} failed"
      logger.error e
    end
  end
end

Instance Attribute Details

#logger ⇒ Object

Returns the value of attribute logger.



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# File 'lib/bbqueue/consumer.rb', line 4

def logger
  @logger
end

Instance Method Details

#after_fork ⇒ Object 



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# File 'lib/bbqueue/consumer.rb', line 10

def after_fork
  # Nothing
end

#before_fork ⇒ Object 



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# File 'lib/bbqueue/consumer.rb', line 6

def before_fork
  # Nothing
end

#fork? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/bbqueue/consumer.rb', line 14

def fork?
  false
end

#fork_and_wait ⇒ Object 



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# File 'lib/bbqueue/consumer.rb', line 18

def fork_and_wait
  if fork?
    before_fork

    Process.fork do
      after_fork

      yield
    end

    Process.wait
  else
    yield
  end
end

#work(job, queue_name) ⇒ Object 



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# File 'lib/bbqueue/consumer.rb', line 34

def work(job, queue_name)
  fork_and_wait do
    begin
      job.work
    rescue Timeout::Error, StandardError => e
      logger.error "Job #{job.inspect} on #{queue_name.inspect} failed"
      logger.error e
    end
  end
end