ruby_sinatra_ff__optly.rb

# optly.rb
require 'singleton'
require 'logger'
require 'optimizely/optimizely_factory'

class Optly
  include Singleton

  def initialize
    sdk_key = '<Your_SDK_Key>'

    logger = Optimizely::SimpleLogger.new(Logger::INFO)

    config_manager = Optimizely::HTTPProjectConfigManager.new(
      sdk_key: sdk_key,
      polling_interval: 10,
      blocking_timeout: 10,
      logger: logger,
    )

    @client = Optimizely::OptimizelyFactory.custom_instance(
      sdk_key,          # sdk_key
      nil,              # datafile
      nil,              # event_dispatcher
      logger,           # logger
      nil,              # error_handler
      false,            # skip_json_validation
      nil,              # user_profile_service
      config_manager,   # config_manager
      nil               # notification_center
    )
  end

  def client
    @client
  end
end