Class: Spider::WaitTime

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

Constant Summary collapse

MAX_WAIT = 
180
DEFAULT_WAIT = 
2
REDUCE_WAIT = 
300

Instance Method Summary collapse

Constructor Details

#initialize(period = nil) ⇒ WaitTime

Returns a new instance of WaitTime.



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# File 'lib/wait_time.rb', line 19

def initialize(period = nil)
  if period.nil?
    @wait = DEFAULT_WAIT
  else
    @wait = (period > MAX_WAIT ? MAX_WAIT : period)
  end
end

Instance Method Details

#back_off ⇒ Object 



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# File 'lib/wait_time.rb', line 27

def back_off
  if @wait.zero?
    @wait = DEFAULT_WAIT
  else
    waitval = @wait * 2
    @wait = (waitval > MAX_WAIT ? MAX_WAIT : waitval)
  end
end

#reduce_wait ⇒ Object 



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# File 'lib/wait_time.rb', line 40

def reduce_wait
  sleep(REDUCE_WAIT)
  back_off
end

#value ⇒ Object 



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# File 'lib/wait_time.rb', line 45

def value
  @wait
end

#wait ⇒ Object 



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# File 'lib/wait_time.rb', line 36

def wait
  sleep(@wait)
end