Rails から Protobuf を使いたくなった話

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1. ©2018 Wantedly, Inc. Rails͔ΒProtobufΛ ࢖͍ͨ͘ͳͬͨ࿩ Cloud Pub/Sub ͰͷεΩʔϚ؅ཧ 2018.9.20 -

   @rerost/@hazumirr

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6. ©2018 Wantedly, Inc.

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12. ©2018 Wantedly, Inc. 7JTJUͷ੹຿͕΍͹͍

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15. ©2018 Wantedly, Inc. https://cloud.google.com/pubsub/docs/overview

16. ©2018 Wantedly, Inc. ΋͠ϚΠΫϩαʔϏεԽ͕ਐΜͩΒ

17. ©2018 Wantedly, Inc. ϝϦοτ
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18. ©2018 Wantedly, Inc. ΋͠ϚΠΫϩαʔϏεԽ͕ਐΜͩΒ

19. ©2018 Wantedly, Inc. ͦ͜Ͱ1SPUPDPM
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20. ©2018 Wantedly, Inc. ΋͠ϚΠΫϩαʔϏεԽ͕ਐΜͩΒ 1SPUPCVG 1SPUPCVG

21. ©2018 Wantedly, Inc. Protocol Buffer

22. ©2018 Wantedly, Inc. syntax = "proto3"; option ruby_package = "Protos::SamplePB";

    message User { // ֶྺ message Education { string school_name = 1; } // ৬ྺ message Experience { string company_name = 1; } string user_name = 1; string introduction = 2; int64 age = 3; repeated Education educations = 4; repeated Experience experiences = 5; } TBNQMFQSPUP

23. ©2018 Wantedly, Inc. # Generated by the protocol buffer compiler.

    DO NOT EDIT! # source: protos/sample.proto require 'google/protobuf' Google::Protobuf::DescriptorPool.generated_pool.build do add_message "User" do optional :user_name, :string, 1 optional :introduction, :string, 2 optional :age, :int64, 3 repeated :educations, :message, 4, "User.Education" repeated :experiences, :message, 5, "User.Experience" end add_message "User.Education" do optional :school_name, :string, 1 end add_message "User.Experience" do optional :company_name, :string, 1 end end module Protos::SamplePB User = Google::Protobuf::DescriptorPool.generated_pool.lookup("User").msgclass User::Education = Google::Protobuf::DescriptorPool.generated_pool.lookup("User.Education").msgclass User::Experience = Google::Protobuf::DescriptorPool.generated_pool.lookup("User.Experience").msgclass end TBNQMFQCSC

24. ©2018 Wantedly, Inc. def new_sample educations = [ Protos::SamplePB::User::Education.new( school_name:

    "۴࿏ߴઐ" ), Protos::SamplePB::User::Education.new( school_name: "ஜ೾େֶ" ), ] experiences = [ Protos::SamplePB::User::Experience.new( company_name: "΢ΥϯςουϦʔגࣜձࣾ" ), ] Protos::SamplePB::User.new( user_name: 'rerost', introduction: 'δϟεί͔Β110km', educations: educations, experiences: experiences, ) end sample = new_sample puts Protos::SamplePB::User.encode_json(sample) { "userName": "rerost", "introduction": "δϟεί͔Β110km", "educations": [ { "schoolName": "۴࿏ߴઐ" }, { "schoolName": "ஜ೾େֶ" } ], "experiences": [ { "companyName": "΢ΥϯςουϦʔגࣜձࣾ" } ] }

25. ©2018 Wantedly, Inc. def new_sample Protos::SamplePB::User.new( user_name: 1, # Τϥʔ

    user_nameͷܕ͕ҧ͏ͷͰ age: 23, introduction: 'δϟεί͔Β110km', educations: [], experiences: [], ) end sample = new_sample ҧ͏ܕΛೖΕͨ৔߹ʹ͍ͭͯ

26. ©2018 Wantedly, Inc. def new_sample Protos::SamplePB::User.new() end sample = new_sample

    puts sample.age # 0 ஋ΛೖΕͳ͔ͬͨ৔߹ʹ͍ͭͯ

27. ©2018 Wantedly, Inc. def new_sample Protos::SamplePB::User.new( age: 23, ) end

    sample = new_sample encoded = Protos::SamplePB::User.encode(sample) puts encoded.class # String decoded = Protos::SamplePB::User.decode(encoded) puts decoded.age # 23 CJOBSZ΁ͷγϦΞϥΠζσγϦΞϥΠζ

28. ©2018 Wantedly, Inc. def new_sample Protos::SamplePB::User.new( age: 23, ) end

    sample = new_sample encoded = Protos::SamplePB::User.encode_json(sample) puts encoded.class # String puts encoded # {"age":23,"educations":[],"experiences":[]} decoded = Protos::SamplePB::User.decode_json(encoded) puts decoded.age # 23 +40/΁ͷγϦΞϥΠζσγϦΞϥΠζ

29. ©2018 Wantedly, Inc. https://github.com/rerost/sample-protobuf

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32. ©2018 Wantedly, Inc. <࠶ܝ>΋͠ϚΠΫϩαʔϏεԽ͕ਐΜͩΒ 1SPUPCVG 1SPUPCVG

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