Class: Idempotent::ExponentialBackoff

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) ⇒ ExponentialBackoff

Returns a new instance of ExponentialBackoff.



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# File 'lib/idempotent/exponential_backoff.rb', line 4

def initialize(options={})
  @max_retries = options[:max_retries] || Idempotent::DEFAULT_RETRY_LIMIT
  @min_retry_interval = options[:min_retry_interval] || 0.5
  @max_retry_interval = options[:max_retry_interval] || 1800
end

Instance Attribute Details

#max_retries ⇒ Object (readonly)

Returns the value of attribute max_retries.



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# File 'lib/idempotent/exponential_backoff.rb', line 2

def max_retries
  @max_retries
end

#max_retry_interval ⇒ Object (readonly)

Returns the value of attribute max_retry_interval.



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# File 'lib/idempotent/exponential_backoff.rb', line 2

def max_retry_interval
  @max_retry_interval
end

#min_retry_interval ⇒ Object (readonly)

Returns the value of attribute min_retry_interval.



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# File 'lib/idempotent/exponential_backoff.rb', line 2

def min_retry_interval
  @min_retry_interval
end

Instance Method Details

#call(request, response, exception) ⇒ Object 



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# File 'lib/idempotent/exponential_backoff.rb', line 10

def call(request, response, exception)
  request.env["idempotent.requests.count"] ||= 0
  request.env["idempotent.requests.count"] += 1
  request.env["idempotent.requests.sleep"] ||= (@min_retry_interval / 2)
  request.env["idempotent.requests.sleep"] *= 2

  if request.env["idempotent.requests.sleep"] > @max_retry_interval
    request.env["idempotent.requests.sleep"] = @max_retry_interval
  end
  if request.env["idempotent.requests.count"] >= @max_retries
    raise Idempotent::RetryLimitExceeded.new(
      request.env["idempotent.requests.exceptions"]
    )
  end
  delay(request.env["idempotent.requests.sleep"])
end

#delay(secs) ⇒ Object 



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# File 'lib/idempotent/exponential_backoff.rb', line 27

def delay(secs)
  sleep(secs)
end