Class: RobotLab::To::Backoff

Inherits:
Object
  • Object
show all
Defined in:
lib/robot_lab/to/backoff.rb

Overview

Exponential backoff with interruptible sleep.

Formula: 60 * 2^(consecutive_errors - 1) seconds 1 error → 60s 2 errors → 120s 3 errors → 240s

Constant Summary collapse

BASE_SECONDS = 
60

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Backoff

Returns a new instance of Backoff.



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# File 'lib/robot_lab/to/backoff.rb', line 14

def initialize
  @interrupted = false
end

Instance Method Details

#interrupt! ⇒ Object 



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# File 'lib/robot_lab/to/backoff.rb', line 41

def interrupt!
  @interrupted = true
end

#sleep_for(consecutive_errors) ⇒ Object 



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# File 'lib/robot_lab/to/backoff.rb', line 18

def sleep_for(consecutive_errors)
  @interrupted = false
  return if consecutive_errors <= 0

  duration = (BASE_SECONDS * (2**(consecutive_errors - 1))).to_i
  duration.times do
    return if @interrupted

    sleep(1)
  end
end

#sleep_seconds(seconds) ⇒ Object

Sleep a fixed number of seconds, interruptibly (1s ticks). Used for polling a blocking decision file. Does NOT reset @interrupted: once a signal fires, subsequent waits return immediately so shutdown is prompt.



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# File 'lib/robot_lab/to/backoff.rb', line 33

def sleep_seconds(seconds)
  seconds.to_i.times do
    return if @interrupted

    sleep(1)
  end
end