OOC keynote: Object Oriented Diversity

Object Oriented Conference の基調講演です。

# URL
HomePage: https://nrslib.com
Twitter: https://twitter.com/nrslib

Transcript

1. Object Oriented Diversity
   Masanobu Naruse
   

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2. あなたのオブジェクト指向は何ですか
   2
   

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8. 8
   オブジェクト指向
   

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9. 9
   なんか違う
   

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10. 10
    それ
    オブジェクト指向
    じゃないよ
    

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11. 11
    それ
    オブジェクト指向
    じゃないよ
    いや
    オブジェクト指向
    だよ
    

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13. 13
    それ
    オブジェクト指向
    じゃないよ
    いや
    オブジェクト指向
    だよ
    

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14. 14
    それ
    オブジェクト指向
    じゃないよ
    いや
    オブジェクト指向
    だよ
    C++ Smalltalk
    

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15. 15
    それ
    オブジェクト指向
    じゃないよ
    いや
    オブジェクト指向
    だよ
    抽象データ型
    メッセージ
    パッシング
    

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16. Object Oriented Diversity
    Masanobu Naruse
    

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17. Object Oriented Diversity
    Masanobu Naruse
    

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18. 18
    Diversity
    

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19. 19
    多様性
    

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20. 多様性を上手く扱うには？
    20
    

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21. 多様性を上手く扱うには？
    21
    

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22. 多様性
    22
    

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23. Polymorphism
    23
    

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24. オブジェクト指向プログラミングを見てみよう！
    24
    

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25. 25
    public class ProposalSubmitService
    {
    private readonly IProposalRepository proposalRepository;
    public ProposalSubmitService(IProposalRepository proposalRepository)
    {
    this.proposalRepository = proposalRepository;
    }
    public void Handle(ProposalSubmitCommand command)
    {
    ...
    var proposal = new Proposal(command.Title, command.Outline);
    proposalRepository.Save(proposal);
    ...
    }
    }
    

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26. 26
    public class ProposalSubmitService
    {
    private readonly IProposalRepository proposalRepository;
    public ProposalSubmitService(IProposalRepository proposalRepository)
    {
    this.proposalRepository = proposalRepository;
    }
    public void Handle(ProposalSubmitCommand command)
    {
    ...
    var proposal = new Proposal(command.Title, command.Outline);
    proposalRepository.Save(proposal);
    ...
    }
    }
    

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27. 27
    public class ProposalSubmitService
    {
    private readonly IProposalRepository proposalRepository;
    public ProposalSubmitService(IProposalRepository proposalRepository)
    {
    this.proposalRepository = proposalRepository;
    }
    public void Handle(ProposalSubmitCommand command)
    {
    ...
    var proposal = new Proposal(command.Title, command.Outline);
    proposalRepository.Save(proposal);
    ...
    }
    }
    

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28. 28
    public class ProposalSubmitService
    {
    private readonly IProposalRepository proposalRepository;
    public ProposalSubmitService(IProposalRepository proposalRepository)
    {
    this.proposalRepository = proposalRepository;
    }
    public void Handle(ProposalSubmitCommand command)
    {
    ...
    var proposal = new Proposal(command.Title, command.Outline);
    proposalRepository.Save(proposal);
    ...
    }
    }
    

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29. 29
    public class ProposalSubmitService
    {
    private readonly IProposalRepository proposalRepository;
    public ProposalSubmitService(IProposalRepository proposalRepository)
    {
    this.proposalRepository = proposalRepository;
    }
    public void Handle(ProposalSubmitCommand command)
    {
    ...
    var proposal = new Proposal(command.Title, command.Outline);
    proposalRepository.Save(proposal);
    ...
    }
    }
    

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30. 30
    public interface IProposalRepository
    {
    Proposal Find(ProposalId id);
    void Save(Proposal proposal);
    void Delete(Proposal proposal);
    }
    

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31. 31
    public interface IProposalRepository
    {
    Proposal Find(ProposalId id);
    void Save(Proposal proposal);
    void Delete(Proposal proposal);
    }
    

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32. 32
    public class ProposalSubmitService
    {
    private readonly IProposalRepository proposalRepository;
    public ProposalSubmitService(IProposalRepository proposalRepository)
    {
    this.proposalRepository = proposalRepository;
    }
    public void Handle(ProposalSubmitCommand command)
    {
    ...
    var proposal = new Proposal(command.Title, command.Outline);
    proposalRepository.Save(proposal);
    ...
    }
    }
    

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33. 33
    public class ProposalSubmitService
    {
    private readonly IProposalRepository proposalRepository;
    public ProposalSubmitService(IProposalRepository proposalRepository)
    {
    this.proposalRepository = proposalRepository;
    }
    public void Handle(ProposalSubmitCommand command)
    {
    ...
    var proposal = new Proposal(command.Title, command.Outline);
    proposalRepository.Save(proposal);
    ...
    }
    }
    

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34. 34
    public class ProposalSubmitService
    {
    private readonly IProposalRepository proposalRepository;
    public ProposalSubmitService(IProposalRepository proposalRepository)
    {
    this.proposalRepository = proposalRepository;
    }
    public void Handle(ProposalSubmitCommand command)
    {
    ...
    var proposal = new Proposal(command.Title, command.Outline);
    proposalRepository.Save(proposal);
    ...
    }
    }
    

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35. 35
    public void Main(string input)
    {
    var repository = CreateRepository(input);
    var proposalSubmitService = new ProposalSubmitService(repository);
    var command = new ProposalSubmitCommand();
    proposalSubmitService.Handle(command);
    }
    private IProposalRepository CreateRepository(string input)
    {
    switch (input)
    {
    case "local" :
    return new InMemoryProposalRepository();
    case "production" :
    return new SqlProposalRepository();
    default:
    throw new ArgumentOutOfRangeException();
    }
    }
    

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36. 36
    public void Main(string input)
    {
    var repository = CreateRepository(input);
    var proposalSubmitService = new ProposalSubmitService(repository);
    var command = new ProposalSubmitCommand();
    proposalSubmitService.Handle(command);
    }
    private IProposalRepository CreateRepository(string input)
    {
    switch (input)
    {
    case "local" :
    return new InMemoryProposalRepository();
    case "production" :
    return new SqlProposalRepository();
    default:
    throw new ArgumentOutOfRangeException();
    }
    }
    

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37. 37
    public void Main(string input)
    {
    var repository = CreateRepository(input);
    var proposalSubmitService = new ProposalSubmitService(repository);
    var command = new ProposalSubmitCommand();
    proposalSubmitService.Handle(command);
    }
    private IProposalRepository CreateRepository(string input)
    {
    switch (input)
    {
    case "local" :
    return new InMemoryProposalRepository();
    case "production" :
    return new SqlProposalRepository();
    default:
    throw new ArgumentOutOfRangeException();
    }
    }
    

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38. 38
    public void Main(string input)
    {
    var repository = CreateRepository(input);
    var proposalSubmitService = new ProposalSubmitService(repository);
    var command = new ProposalSubmitCommand();
    proposalSubmitService.Handle(command);
    }
    private IProposalRepository CreateRepository(string input)
    {
    switch (input)
    {
    case "local" :
    return new InMemoryProposalRepository();
    case "production" :
    return new SqlProposalRepository();
    default:
    throw new ArgumentOutOfRangeException();
    }
    }
    

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39. 39
    public void Main(string input)
    {
    var repository = CreateRepository(input);
    var proposalSubmitService = new ProposalSubmitService(repository);
    var command = new ProposalSubmitCommand();
    proposalSubmitService.Handle(command);
    }
    private IProposalRepository CreateRepository(string input)
    {
    switch (input)
    {
    case "local" :
    return new InMemoryProposalRepository();
    case "production" :
    return new SqlProposalRepository();
    default:
    throw new ArgumentOutOfRangeException();
    }
    }
    

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40. 40
    オブジェクト指向
    

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41. 41
    public interface オブジェクト指向
    {
    }
    

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42. 42
    それ
    オブジェクト指向
    じゃないよ
    いや
    オブジェクト指向
    だよ
    C++ Smalltalk
    

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44. コードを小説として捉えたとき
    44
    

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45. Polymorphism の役割は？
    45
    

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46. 46
    文脈
    

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47. 47
    コンテキスト
    

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48. IT技術分野には多くのコンテキストがある
    48
    

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49. モデル
    49
    

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50. エンティティ
    50
    

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51. ドメイン
    51
    

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52. コンテキストが存在することを意識しよう
    52
    

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53. プログラミングでも便利
    53
    

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54. UserContext
    54
    

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55. HttpContext
    55
    

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56. コンテキストを恐れないで
    56
    

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57. 57
    重要なのはどのコンテキストなのかを意識すること
    

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58. 58
    多様性を受け入れよう
    

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59. 多様性を恐れないための心構え
    59
    

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63. あなたの考えを
    あなたのコンテキストで
    63
    

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66. Object Oriented Diversity
    Masanobu Naruse
    

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67. Auther Masanobu Naruse
    HomePage https://nrslib.com
    Twitter @nrslib
    

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