Class: PerfectQueue::Worker

Inherits:
Object
  • Object
show all
Defined in:
lib/perfectqueue/worker.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(runner, config = nil, &block) ⇒ Worker

Returns a new instance of Worker.



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# File 'lib/perfectqueue/worker.rb', line 26

def initialize(runner, config=nil, &block)
  block = Proc.new { config } if config
  config = block.call

  @config = config
  @runner = runner

  @detach_wait = config[:detach_wait] || config['detach_wait'] || 10.0

  @sv = Supervisor.new(runner, &block)
  @detach = false
  @finish_flag = BlockingFlag.new
end

Class Method Details

.run(runner, config = nil, &block) ⇒ Object 



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# File 'lib/perfectqueue/worker.rb', line 22

def self.run(runner, config=nil, &block)
  new(runner, config, &block).run
end

Instance Method Details

#detach ⇒ Object 



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# File 'lib/perfectqueue/worker.rb', line 87

def detach
  send_signal(:INT)
  @detach = true
  @finish_flag.set!
end

#logrotated ⇒ Object 



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# File 'lib/perfectqueue/worker.rb', line 83

def logrotated
  send_signal(:USR2)
end

#restart(immediate) ⇒ Object 



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# File 'lib/perfectqueue/worker.rb', line 79

def restart(immediate)
  send_signal(immediate ? :HUP : :USR1)
end

#run ⇒ Object 



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# File 'lib/perfectqueue/worker.rb', line 40

def run
  @pid = fork do
    $0 = "perfectqueue-supervisor:#{@runner}"
    @sv.run
    exit! 0
  end

  install_signal_handlers

  begin

    until @finish_flag.set?
      pid, status = Process.waitpid2(@pid, Process::WNOHANG)
      break if pid
      @finish_flag.wait(1)
    end

    return if pid

    if @detach
      wait_time = Time.now + @detach_wait
      while (w = wait_time - Time.now) > 0
        sleep [0.5, w].min
        pid, status = Process.waitpid2(@pid, Process::WNOHANG)
        break if pid
      end

    else
      # child process finished unexpectedly
    end

  rescue Errno::ECHILD
  end
end

#stop(immediate) ⇒ Object 



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# File 'lib/perfectqueue/worker.rb', line 75

def stop(immediate)
  send_signal(immediate ? :QUIT : :TERM)
end