Class: Spool::Pool

Inherits:
Object
  • Object
show all
Defined in:
lib/spool/pool.rb

Constant Summary collapse

SIGNALS = 
{
  INT:  :stop!,
  TERM: :stop!,
  QUIT: :stop,
  HUP:  :reload,
  USR2: :restart,
  TTIN: :incr,
  TTOU: :decr
}

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(configuration = nil, &block) ⇒ Pool

Returns a new instance of Pool.



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# File 'lib/spool/pool.rb', line 16

def initialize(configuration=nil, &block)
  @configuration = configuration || DSL.configure(&block)
  @processes = []
  @started = false
end

Instance Attribute Details

#configuration ⇒ Object (readonly)

Returns the value of attribute configuration.



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# File 'lib/spool/pool.rb', line 14

def configuration
  @configuration
end

#processes ⇒ Object (readonly)

Returns the value of attribute processes.



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# File 'lib/spool/pool.rb', line 14

def processes
  @processes
end

#runner ⇒ Object (readonly)

Returns the value of attribute runner.



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# File 'lib/spool/pool.rb', line 14

def runner
  @runner
end

Instance Method Details

#decr(count = 1) ⇒ Object 



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# File 'lib/spool/pool.rb', line 66

def decr(count=1)
  configuration.processes -= count
end

#incr(count = 1) ⇒ Object 



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# File 'lib/spool/pool.rb', line 62

def incr(count=1)
  configuration.processes += count
end

#reload ⇒ Object 



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# File 'lib/spool/pool.rb', line 70

def reload
  @configuration = DSL.configure configuration.source_file if configuration.source_file
end

#restart ⇒ Object 



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# File 'lib/spool/pool.rb', line 74

def restart
  processes.each(&:stop)
end

#start ⇒ Object 



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# File 'lib/spool/pool.rb', line 30

def start
  @started = true

  handle_signals

  File.write configuration.pidfile, Process.pid if configuration.pidfile

  configuration.processes.times.map do
    processes << Spawner.spawn(configuration)
  end

  while @started
    check_status
    sleep 0.05
  end
end

#started? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/spool/pool.rb', line 22

def started?
  @started
end

#stop(timeout = 0) ⇒ Object 



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# File 'lib/spool/pool.rb', line 47

def stop(timeout=0)
  processes.each(&:stop)
  Timeout.timeout(timeout) { wait_for_stopped processes }
rescue Timeout::Error
ensure
  stop!
end

#stop! ⇒ Object 



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# File 'lib/spool/pool.rb', line 55

def stop!
  processes.each(&:kill)
  processes.clear
  File.delete configuration.pidfile if File.exists? configuration.pidfile
  @started = false
end

#stopped? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/spool/pool.rb', line 26

def stopped?
  !started?
end