Class: NoLockFirefox::PortPool

Inherits:
Object
  • Object
show all
Defined in:
lib/webdriver-firefox/port_pool.rb

Constant Summary collapse

HOST = 
"127.0.0.1"
START_PORT = 
24576

Instance Method Summary collapse

Constructor Details

#initialize ⇒ PortPool

Returns a new instance of PortPool.



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# File 'lib/webdriver-firefox/port_pool.rb', line 10

def initialize
  begin
    @random = ::Random.new
  rescue
    @random = nil
  end
end

Instance Method Details

#find_free_port ⇒ Object 



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# File 'lib/webdriver-firefox/port_pool.rb', line 18

def find_free_port
  probed = nil

  tid = ENV.fetch('TDDIUM_TID', 0).to_i

  range = 256*tid
  if @random then
    index = @random.rand(256)
  else
    index = rand(256)
  end
  limit = START_PORT+256*(tid+1)

  timeout = Time.now+90

  while Time.now < timeout do
    port = START_PORT+range+index
    while port < limit do
      probed = probe_port(port)
      if probed then
        probed.close
        return port
      end
      port += 1
	  Kernel.sleep(0.1)
    end
  end

  raise "unable to find open port in reasonable time"
end

#probe_port(port) ⇒ Object 



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# File 'lib/webdriver-firefox/port_pool.rb', line 49

def probe_port(port)
  begin
    s = TCPServer.new(HOST, port)
    if s.respond_to?(:close_on_exec=) then
      s.close_on_exec = true
    end
#        ChildProcess.close_on_exec s
    return s
  rescue SocketError, Errno::EADDRINUSE => e
    return nil
  end
end