Instrumental wrapper

instrument.rb

class Instrument
  class << self
    attr_reader :instrumental_agent

    def time(metric, *args, &block)
      instrumental_agent.time(metric, *args, &block)
    end

    def increment(metric, *args)
      instrumental_agent.increment(metric, *args)
    end

    def gauge(metric, *args)
      instrumental_agent.gauge(metric, *args)
    end

    def with_instrumentation(key_prefix, &block)
      increment("#{key_prefix}.started")
      begin
        result = time("#{key_prefix}.duration", &block)
        increment("#{key_prefix}.success")
        result
      rescue RedisMutex::LockError
        increment("#{key_prefix}.already_running")
        raise
      rescue
        increment("#{key_prefix}.failure")
        raise
      end
    end
  end

  @instrumental_agent = Instrumental::Agent.new(
    Rails.configuration.instrumental.api_key,
    enabled: Rails.configuration.instrumental.enabled || Rails.env.production?,
  )
end