Module: Qs::Daemon::InstanceMethods

Defined in:
lib/qs/daemon.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#daemon_data ⇒ Object (readonly)

Returns the value of attribute daemon_data.



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# File 'lib/qs/daemon.rb', line 26

def daemon_data
  @daemon_data
end

#signals_redis_key ⇒ Object (readonly)

Returns the value of attribute signals_redis_key.



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# File 'lib/qs/daemon.rb', line 26

def signals_redis_key
  @signals_redis_key
end

Instance Method Details

#halt(wait = false) ⇒ Object 



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# File 'lib/qs/daemon.rb', line 119

def halt(wait = false)
  return unless self.running?
  @state.set :halt
  wakeup_thread
  wait_for_shutdown if wait
end

#initialize ⇒ Object 



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# File 'lib/qs/daemon.rb', line 28

def initialize
  config = self.class.config
  begin
    config.validate!
  rescue InvalidError => exception
    exception.set_backtrace(caller)
    raise exception
  end
  Qs.init

  @daemon_data = DaemonData.new({
    :name             => config.name,
    :pid_file         => config.pid_file,
    :shutdown_timeout => config.shutdown_timeout,
    :worker_class     => config.worker_class,
    :worker_params    => config.worker_params,
    :num_workers      => config.num_workers,
    :error_procs      => config.error_procs,
    :logger           => config.logger,
    :queues           => config.queues,
    :verbose_logging  => config.verbose_logging,
    :routes           => config.routes
  })

  @signals_redis_key = "signals:#{self.daemon_data.name}-" \
                       "#{Socket.gethostname}-#{::Process.pid}"

  @thread           = nil
  @worker_available = WorkerAvailable.new
  @state            = State.new(:stop)

  # set the size of the client to the num workers + 1, this ensures we
  # have 1 connection for fetching work from redis and at least 1
  # connection for each worker to requeue its message when hard-shutdown
  @client = QsClient.new(Qs.redis_connect_hash.merge({
    :timeout => 1,
    :size    => self.daemon_data.num_workers + 1
  }))

  @worker_pool = DatWorkerPool.new(self.daemon_data.worker_class, {
    :num_workers   => self.daemon_data.num_workers,
    :logger        => self.daemon_data.dwp_logger,
    :worker_params => self.daemon_data.worker_params.merge({
      :qs_daemon_data      => self.daemon_data,
      :qs_client           => @client,
      :qs_worker_available => @worker_available,
      :qs_logger           => self.logger
    })
  })
end

#logger ⇒ Object 



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# File 'lib/qs/daemon.rb', line 91

def logger
  @daemon_data.logger
end

#name ⇒ Object 



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# File 'lib/qs/daemon.rb', line 79

def name
  @daemon_data.name
end

#pid_file ⇒ Object 



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# File 'lib/qs/daemon.rb', line 87

def pid_file
  @daemon_data.pid_file
end

#process_label ⇒ Object 



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# File 'lib/qs/daemon.rb', line 83

def process_label
  @daemon_data.process_label
end

#queue_redis_keys ⇒ Object 



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# File 'lib/qs/daemon.rb', line 95

def queue_redis_keys
  @daemon_data.queue_redis_keys
end

#running? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/qs/daemon.rb', line 99

def running?
  !!(@thread && @thread.alive?)
end

#start ⇒ Object 



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# File 'lib/qs/daemon.rb', line 103

def start
  # ping to check that it can communicate with redis before running,
  # this is friendlier than starting and continously erroring because
  # it can't dequeue
  @client.ping
  @state.set :run
  @thread ||= Thread.new{ work_loop }
end

#stop(wait = false) ⇒ Object 



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# File 'lib/qs/daemon.rb', line 112

def stop(wait = false)
  return unless self.running?
  @state.set :stop
  wakeup_thread
  wait_for_shutdown if wait
end