Class: AmplitudeExperiment::LocalEvaluationFetcher

Inherits:
Object
  • Object
show all
Defined in:
lib/experiment/local/fetcher.rb

Overview

LocalEvaluationFetcher Fetch local evaluation mode flag configs from the Experiment API server. These flag configs can be used to perform local evaluation.

Constant Summary collapse

FLAG_CONFIG_TIMEOUT = 
5000

Instance Method Summary collapse

Constructor Details

#initialize(api_key, debug, server_url = 'https://api.lab.amplitude.com') ⇒ LocalEvaluationFetcher

Returns a new instance of LocalEvaluationFetcher.



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# File 'lib/experiment/local/fetcher.rb', line 8

def initialize(api_key, debug, server_url = 'https://api.lab.amplitude.com')
  @api_key = api_key
  @uri = "#{server_url}/sdk/rules?eval_mode=local"
  @debug = debug
  @http =  PersistentHttpClient.get(@uri, { read_timeout: FLAG_CONFIG_TIMEOUT })
end

Instance Method Details

#fetch ⇒ Hash

Fetch local evaluation mode flag configs from the Experiment API server. These flag configs can be used to perform local evaluation.

Returns:

  • (Hash) —

    The flag configs



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# File 'lib/experiment/local/fetcher.rb', line 19

def fetch
  # fetch flag_configs
  headers = {
    'Authorization' => "Api-Key #{@api_key}",
    'Content-Type' => 'application/json;charset=utf-8'
  }
  request = Net::HTTP::Get.new(@uri, headers)
  response = @http.request(request)
  raise `flagConfigs - received error response: #{response.code}: #{response.body}` unless response.is_a?(Net::HTTPOK)

  flag_configs = parse(response.body)
  @logger.debug("[Experiment] Fetch flag configs: #{request.body}") if @debug
  flag_configs
end