Class: Ayl::Beanstalk::Worker

Inherits:
Worker
  • Object
show all
Includes:
Pool, Logging
Defined in:
lib/ayl-beanstalk/worker.rb

Instance Method Summary collapse

Methods included from Pool

#pool

Constructor Details

#initialize(host = 'localhost', port = 11300) ⇒ Worker

Returns a new instance of Worker.



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# File 'lib/ayl-beanstalk/worker.rb', line 9

def initialize(host='localhost', port=11300)
  logger.debug "#{self.class.name}.initialize(#{host.inspect}, #{port})"
  @host = host
  @port = port
end

Instance Method Details

#decay_job(job) ⇒ Object 



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# File 'lib/ayl-beanstalk/worker.rb', line 77

def decay_job(job)
  job.decay
rescue RuntimeError => ex
  logger.error "#{self.class.name} Error decaying job: #{ex}\n#{ex.backtrace.join("\n")}"
  Ayl::Mailer.instance.deliver_message("#{self.class.name} Error decaying job", ex)
end

#delete_job(job) ⇒ Object 



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# File 'lib/ayl-beanstalk/worker.rb', line 70

def delete_job(job)
  job.delete
rescue RuntimeError => ex
  logger.error "#{self.class.name} Error deleting job: #{ex}\n#{ex.backtrace.join("\n")}"
  Ayl::Mailer.instance.deliver_message("#{self.class.name} Error deleting job", ex)
end

#handle_job_decay(job, ex) ⇒ Object 



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# File 'lib/ayl-beanstalk/worker.rb', line 58

def handle_job_decay(job, ex)
  logger.debug "Age of job: #{job.age}"
  if job.age > 60
    Ayl::Mailer.instance.deliver_message("#{self.class.name} Deleting decayed job; it just took too long.", ex)
    logger.debug "Deleting job"
    delete_job(job)
  else
    logger.debug "Decaying job"
    decay_job(job)
  end
end

#process_messages ⇒ Object 



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# File 'lib/ayl-beanstalk/worker.rb', line 15

def process_messages
  logger.debug "#{self.class.name} entering process_messages loop watching: #{Ayl::MessageOptions.default_queue_name}"
  # Set the queue that we will be watching
  pool.watch(Ayl::MessageOptions.default_queue_name)
  while true
    break if @stop
    job = nil
    begin
      job = pool.reserve
    rescue Exception => ex
      logger.error "#{self.class.name} Exception in process_messages: #{ex}\n#{ex.backtrace.join("\n")}"
      Ayl::Mailer.instance.deliver_message("#{self.class.name} Exception in process_messages.", ex)
      delete_job(job) unless job.nil?
      next
    end
    break if job.nil?
    msg = nil
    begin
      msg = Ayl::Message.from_hash(job.ybody)
      process_message(msg)
      delete_job(job)
    rescue Ayl::UnrecoverableMessageException => ex
      logger.error "#{self.class.name} Unrecoverable exception in process_messages: #{ex}"
      Ayl::Mailer.instance.deliver_message("#{self.class.name} Unrecoverable exception in process_messages", ex)
      delete_job(job)
    rescue SystemExit
      # This exception is raised when 'Kernel.exit' is called. In this case
      # we want to make sure the job is deleted, then we simply re-raise
      # the exception and we go bye-bye.
      delete_job(job)
      raise
    rescue Exception => ex
      logger.error "#{self.class.name} Exception in process_messages: #{ex}\n#{ex.backtrace.join("\n")}"
      if msg.options.decay_failed_job
        handle_job_decay(job, ex)
      else
        delete_job(job)
        Ayl::Mailer.instance.deliver_message("#{self.class.name} Exception in process_messages.", ex)
      end
    end
  end
end