Class: HalClient::Retryinator

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

Overview

Example usage: Retryinator.call { fetch_http_response }

Constant Summary collapse

DEFAULT_MAX_TRIES = 
3
DEFAULT_DURATION = 
1

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) ⇒ Retryinator

Returns a new instance of Retryinator.



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# File 'lib/hal_client/retryinator.rb', line 19

def initialize(options={})
  @max_tries = options.fetch(:max_tries, DEFAULT_MAX_TRIES)
  @duration = options.fetch(:duration, DEFAULT_DURATION)
  @logger = options.fetch(:logger, HalClient::NullLogger.new)
end

Instance Attribute Details

#duration ⇒ Object (readonly)

Returns the value of attribute duration.



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# File 'lib/hal_client/retryinator.rb', line 14

def duration
  @duration
end

#logger ⇒ Object (readonly)

Returns the value of attribute logger.



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# File 'lib/hal_client/retryinator.rb', line 14

def logger
  @logger
end

#max_tries ⇒ Object (readonly)

Returns the value of attribute max_tries.



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# File 'lib/hal_client/retryinator.rb', line 14

def max_tries
  @max_tries
end

Instance Method Details

#retryable(&block) ⇒ Object 



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# File 'lib/hal_client/retryinator.rb', line 25

def retryable(&block)
  current_try = 1

  loop do
    begin
      result = yield block

      if server_error?(result.code)
        logger.warn "Received a #{result.code} response with body:\n#{result.body}"
        return result if current_try >= max_tries
      else
        return result
      end
    rescue HttpError => e
      logger.warn "Encountered an HttpError: #{e.message}"
      raise e if current_try >= max_tries
    end

    logger.warn "Failed attempt #{current_try} of #{max_tries}. " +
                  "Waiting #{duration} seconds before retrying"

    current_try += 1
    sleep duration
  end
end

#server_error?(status_code) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/hal_client/retryinator.rb', line 51

def server_error?(status_code)
  500 <= status_code && status_code < 600
end