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FoC-/mongo_object_id_generator.rb

Created March 29, 2019 11:49
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mongo_object_id_generator.rb
# https://github.com/mongodb/bson-ruby/blob/master/lib/bson/object_id.rb#L369
# https://repl.it/languages/ruby
require "digest/md5"
require "socket"
@counter = rand(0x1000000)
puts "counter: #{@counter}"
@machine_id = Digest::MD5.digest(Socket.gethostname).unpack("N")[0]
puts "machine_id: #{@machine_id}"
@process_id = Process.pid % 0xFFFF
puts "process_id: #{@process_id}"
@id = [::Time.new.to_i, @machine_id, @process_id, @counter << 8 ].pack("N NX lXX NX")
puts "id: #{@id.unpack("H*").first}";
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