Class: EppoClient::Poller

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

Overview

The poller class invokes a callback and waits on repeat on a separate thread

Instance Method Summary collapse

Constructor Details

#initialize(interval_millis, jitter_millis, callback) ⇒ Poller

Returns a new instance of Poller.



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# File 'lib/poller.rb', line 10

def initialize(interval_millis, jitter_millis, callback)
  @jitter_millis = jitter_millis
  @interval = interval_millis
  @stopped = Concurrent::Atom.new(false)
  @callback = callback
  @thread = nil
end

Instance Method Details

#_wait_for_interval ⇒ Object 



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# File 'lib/poller.rb', line 44

def _wait_for_interval
  interval_with_jitter = @interval - rand(@jitter_millis)
  sleep interval_with_jitter / 1000
end

#poll ⇒ Object 



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# File 'lib/poller.rb', line 32

def poll
  until stopped?
    begin
      @callback.call
    rescue StandardError => e
      EppoClient.logger('err').error("Unexpected error running poll task: #{e}")
      break
    end
    _wait_for_interval
  end
end

#start ⇒ Object 



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# File 'lib/poller.rb', line 18

def start
  @stopped.reset(false)
  @thread = Thread.new { poll }
end

#stop ⇒ Object 



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# File 'lib/poller.rb', line 23

def stop
  @stopped.reset(true)
  Thread.kill(@thread)
end

#stopped? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/poller.rb', line 28

def stopped?
  @stopped.value
end