Module: TigerBeetle::ID

Defined in:
lib/tigerbeetle/id.rb

Class Method Summary collapse

Class Method Details

.generate ⇒ Object

Generates a Universally Unique and Sortable Identifier as a 128-bit integer. Based on ULIDs Inspired by ext/tb_client/tigerbeetle/src/clients/python/src/tigerbeetle/client.py#id



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# File 'lib/tigerbeetle/id.rb', line 9

def self.generate
  rnd_bytes = SecureRandom.random_bytes(10)
  time_ms = (Time.now.to_f * 1000).to_i

  # Ensure time_ms monotonically increases
  if time_ms <= @last_time_ms
    time_ms = @last_time_ms
  else
    @last_time_ms = time_ms
  end

  # Convert time_ms integer to 6 bytes (string) in big-endian
  time_bytes = [time_ms].pack("Q>")[2..7]

  # Combine time and randomness and convert to two 64-bit integers in big-endian
  integers = (time_bytes + rnd_bytes).unpack("Q>Q>")

  # Re-combine into a single 128-bit integer in big-endian
  integers[0] << 64 | integers[1]
end