DDDの始め方

DDDを始めるにあたって実施したことを実例を交えて紹介しています。
内容
- DDDとは何か
- なぜDDDをやるのか
- 実際にどうやって導入したか

Transcript

1. DDDͷ࢝Ίํ
   

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2. ࣗݾ঺հ
   • ീרߛ࢜(ϠϚΩ ώϩγ)
   • (ג)ϗϫΠτϓϥεͷΤϯδχΞ
   • ܦྺ͸ۀ຿ܥSE→webΤϯδχΞ
   • DDD΍ΦϒδΣΫτࢦ޲ͳͲͷઃܭͷ࿩͕޷͖
   

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3. ΞδΣϯμ
   DDDͬͯʁ
   DDDΛ΍Δಈػ
   ͔͜͜Β࢝ΊΔDDD
   

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4. DDDͬͯʁ
   

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5. υϝΠϯۦಈઃܭ
   (Domain-Driven Design)
   ΤϦοΫɾΤϰΝϯε͕ఏএͨ͠։ൃํ๏
   

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6. DDD͕໨ࢦ͢΋ͷ
   

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7. –Eric Evans
   ΤϦοΫɾΤϰΝϯεͷυϝΠϯۦಈઃܭ
   ʮ·͕͖͑ʯ
   “໺৺తͳ໨ඪΛୡ੒ͯ͠ɺاۀͷܧଓత
   ͳཁٻΛຬͨ͢΂͘ਐԽ͠ଓ͚Δෳࡶͳ
   ιϑτ΢ΣΞΛ࡞Γग़͢͜ͱ”
   

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8. ͬ͘͟Γݴ͏ͱɺ
   ෳࡶͳγεςϜΛϨΨγʔʹͤͣɺ
   ਐԽͤ͞ଓ͚ΔͨΊͷ։ൃํ๏
   (໨ࢦ͞ͳ͍΋ͷ)
   • ୯७ͳ΋ͷΛૉૣ͘࡞Δ
   • Ұ࣌తͳ࢖͍ࣺͯεΫϦϓτͷ࡞੒
   • ࡞ͬͨΒϝϯς͠ͳ͍ιϑτ΢ΣΞ
   

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9. DDDͷಛ௃
   

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10. –Martin Fowler
    ΤϦοΫɾΤϰΝϯεͷυϝΠϯۦಈઃܭ
    ʮংจʯ
    “ιϑτ΢ΣΞ։ൃΛෳࡶʹ͢ΔཁҼ͸਺
    ଟ͘ଘࡏ͢Δɻ͔͠͠ɺ͜ͷෳࡶ͞ͷ֩
    ৺ʹ͋Δͷ͸ɺ໰୊υϝΠϯࣗମ͕ຊ࣭
    తʹෳࡶͰ͋Δͱ͍͏ࣄ࣮ͩɻ”
    

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11. γεςϜͷෳࡶ͞ͷཁҼ
    • γεςϜԽ͢Δۀ຿(=υϝΠϯ)͕ෳࡶ
    • ͜ͷυϝΠϯΛϞσϧԽ͢Δ͜ͱͰγες
    ϜΛίϯτϩʔϧͰ͖Δ΋ͷʹ͢Δ
    ٕज़ྖҬͰ͸ͳ࣮͘ࡍͷۀ຿ʹண໨ͯ͠ਐΊ
    ͍ͯ͘ͷ͕ಛ௃
    

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12. Ͳ͏΍࣮ͬͯݱ͢Δ͔
    1. ࣮ࡍͷۀ຿ΛϞσϦϯά(υϝΠϯϞσϧ)
    2. υϝΠϯϞσϧΛίʔυͰදݱ
    3. ಈ͘ίʔυΛݟͤɺϑΟʔυόοΫΛड͚Δ
    ͜ΕΛճ͠ͳ͕ΒυϝΠϯϞσϧΛચ࿅ͤ͞Δ
    

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13. DDDΛ΍Δಈػ
    

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14. ಈػᶃɿ
    मਖ਼ɾվमͷӨڹൣғΛௐ΂
    Δ͜ͱ͕େม
    

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15. DDDͰ͸
    ۀ຿͕ϞσϦϯάͷத৺
    ۀ຿ͷมߋ͕γεςϜ(Ϟσϧ)ͷม
    ߋʹͳΔ
    ద੾ͳϞσϦϯά͕͞ΕΕ͹ɺ
    ۀ຿ʹؔ܎ͷͳ͍γεςϜʹӨڹ͸Ͱͳ͍
    

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16. ಈػᶄɿ
    (ৄࡉ͗͢Δ)υΩϡϝϯτΛ
    ॻ͖ͨ͘ͳ͍
    (ϝϯς͞Εͳ͍ΑͶʁ)
    (ίʔυಡΉΑͶʁ)
    

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17. DDDͰ͸
    ϞσϧΛίʔυͰදݱ͢Δ
    υΩϡϝϯτͰ͸ͳ͍
    ςετίʔυΛؚΊͯɺ
    ίʔυ͕ୈҰڃͷυΩϡϝϯτ
    

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18. ಈػᶅɿ
    ϨΨγʔʹͳͬͯ͠·ͬͨγ
    εςϜΛͲ͏ʹ͔͍ͨ͠
    

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19. DDDͷ໨త͸
    γεςϜΛϨΨγʔʹͤͣɺ
    ܧଓతʹਐԽͤ͞Δ͜ͱ
    

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20. DDDͷ·ͱΊ
    • γεςϜ͕ෳࡶʹͳΔͷ͸ѻ͏ۀ຿͕ෳࡶ
    ͔ͩΒ
    • ۀ຿ͷϞσϦϯά(υϝΠϯϞσϧ)Λઃܭͷ
    த৺ʹ͢Δ
    • ϞσϦϯάˠίʔσΟϯάˠϑΟʔυόοΫ
    ͷαΠΫϧͰυϝΠϯϞσϧΛચ࿅ͤ͞Δ
    • γεςϜΛϨΨγʔʹͤͣɺܧଓతʹਐԽ͞
    ͤΔ
    

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21. ͔͜͜Β࢝ΊΔDDD
    ϗϫΠτϓϥεͰ࣮ફͨ͜͠ͱͷ঺հ
    

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22. 1. ΞʔΩςΫνϟͷಋೖ
    ·ͣ͸DDDΒ͘͠ॻ͚Δ؀ڥΛ੔උ
    

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23. ಋೖͨ͠ΞʔΩςΫνϟ
    

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24. 3૚ʴυϝΠϯ૚
    ίϯτϩʔϥʔ
    ΠϯϑϥετϥΫνϟ
    ΞϓϦέʔγϣϯ υϝΠϯ
    

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25. ֤૚ͷઆ໌
    

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26. υϝΠϯ૚
    ίϯτϩʔϥʔ
    ΠϯϑϥετϥΫνϟ
    ΞϓϦέʔγϣϯ υϝΠϯ
    

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27. υϝΠϯ૚
    • υϝΠϯϞσϧ͕ଉͮ͘৔ॴ
    • ϏδωεϩδοΫΛॻ͘
    • DB΍UIͳͲͷٕज़ελοΫͷૢ࡞͸͜͜ʹ
    ͸ॻ͔ͳ͍
    

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28. ίϯτϩʔϥʔ૚
    ίϯτϩʔϥʔ
    ΠϯϑϥετϥΫνϟ
    ΞϓϦέʔγϣϯ υϝΠϯ
    

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29. ίϯτϩʔϥʔ૚
    • UI΍όονίϚϯυͷड͚ޱ
    • ϦΫΤετ΍Ҿ਺ͷݕূΛߦ͍ΞϓϦέʔ
    γϣϯ૚ͷαʔϏεΛݺͼग़͢ίʔυΛॻ
    ͘
    

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30. ΞϓϦέʔγϣϯ૚
    ίϯτϩʔϥʔ
    ΠϯϑϥετϥΫνϟ
    ΞϓϦέʔγϣϯ υϝΠϯ
    

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31. ΞϓϦέʔγϣϯ૚
    • ֎෦ެ։ΠϯλʔϑΣʔε
    • Πϯϑϥ૚ͱυϝΠϯ૚ͷڮ౉͠
    • ΞϓϦέʔγϣϯΛ࣮ߦ͢Δखଓ͖Λॻ͘
    

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32. ΠϯϑϥετϥΫνϟ૚
    ίϯτϩʔϥʔ
    ΠϯϑϥετϥΫνϟ
    ΞϓϦέʔγϣϯ υϝΠϯ
    

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33. ΠϯϑϥετϥΫνϟ૚
    • DBɺϑΝΠϧɺΩϟογϡͳͲΠϯϑϥʹ
    ΞΫηε͢ΔίʔυΛॻ͘
    

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34. σΟϨΫτϦߏ੒
    Xxxx
    ├── App
    │ └── XxxxService.php
    ├── Domain
    │ └── Xxxx.php
    ├── Infra
    │ └── XxxxRepository.php
    └── UI
    └── XxxxController.php
    

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35. ·ͣ͸͡Ίʹ໨ࢦͨ͜͠ͱ
    

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36. ৽͍͠ΞʔΩςΫνϟͰ౰ͨ
    Γલͷ͜ͱΛ࣮ݱ͢Δ
    • ը໘ೖྗ͔ΒDBొ࿥
    • DB͔ΒσʔλΛऔಘͯ͠ɺը໘දࣔ
    

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37. ࣍ʹ໨ࢦ͍ͯ͠Δ͜ͱ
    

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38. ίϯτϩʔϥʔͳͲͰॻ͔Ε
    ͨ1ຕؠͷίʔυΛ֤ϨΠ
    Ϡʔ΁Ҡಈ͢Δ
    

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39. ͨͩ͠ʂ
    ࠷ѱίϯτϩʔϥʔ૚ʹॻ͔Εͨίʔυ͸Ξ
    ϓϦέʔγϣϯ૚ʹ͔͚͹ಈ͖·͢ɻ
    ͱ͍͏৺ཧత҆શωοτ΋Ҋ಺͢Δɻ
    

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40. ·ͱΊ
    • ΞʔΩςΫνϟΛಋೖͯ͠·ͣ͸DDDͰ
    ॻ͚Δ৔ॴ͕֬อ͞Εͨ
    • ࠓ·ͰϢχοτςετ͕ॻ͚ͳ͔ͬͨίʔ
    υͰςετ͕ॻ͚ΔΑ͏ʹͳͬͨ
    • (ͦͷ෼࣌ؒ΋͔͔ΔΑ͏ʹͳͬͨ)
    

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41. 2. υϝΠϯϞσϧΛҭͯΔ
    ͍Α͍ΑDDDͰ࣮ࡍʹίʔυ͕ॻ͚Δ
    

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42. υϝΠϯϞσϧΛҭͯΔࡍʹ
    ग़͖ͯͨ໰୊
    

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43. ໰୊ᶃɿ
    Ͳ͏͍͏ج४ͰίʔυΛ·ͱ
    Ί͍ͯͬͨΒྑ͍ͷ͔ʁ
    

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44. ࣗ෼ͨͪͷαʔϏε͕ͲΜͳ
    ۀ຿Ͱ੒Γཱ͍ͬͯΔ͔੔ཧ
    ͢Δ
    →αϒυϝΠϯΛચ͍ग़͢
    

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45. αϒυϝΠϯ
    • ֤ۀ຿୯ҐͷྖҬ
    • ҙࢥܾఆऀɺओʹؔΘΔਓୡɺൃੜ͢ΔΠ
    ϕϯτͷछྨͳͲͰઢΛ۠੾Δ
    

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46. ΍͍ͬͯΔ༷ࢠ
    

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47. ໰୊ᶄɿ
    ࣗ෼ͨͪͷγεςϜ͸DDDత
    ʹ͸Ͳ͏ͳͷʁ
    

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48. ࣗ෼ͨͪͷαʔϏε͕ͲΜͳ
    γεςϜͰ੒Γཱ͍ͬͯΔ͔
    ੔ཧ͢Δ
    • ڥք͚ͮΒΕͨίϯςΩετΛચ͍ग़͢
    • αϒυϝΠϯͱϚοϐϯά͢Δ
    

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49. ڥք͚ͮΒΕͨίϯςΩετ
    • αϒγεςϜɺ֎෦γεςϜͳͲͷൺֱత
    ໨ʹݟ͑ΔγεςϜͷڥ໨
    

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50. Կ͕෼͔Δ͔ʁ
    • αϒγεςϜͱ֎෦γεςϜΛআ͘ڥք͚ͮ
    ΒΕͨίϯςΩετ͸1:1͕ཧ૝͕ͩɺݱঢ়
    ͕Ͳͷ͘Β͍཭Ε͍ͯΔ͔෼ੳͰ͖Δ
    • αϒυϝΠϯ୯ҐͰτοϓϨϕϧͷ໊લۭ
    ͕ؒखʹೖΔ
    

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51. Xxxx
    ├── App
    │ └── XxxxService.php
    ├── Domain
    │ └── Xxxx.php
    ├── Infra
    │ └── XxxxRepository.php
    └── UI
    └── XxxxController.php
    ˡ͜Ε͕ܾ·Δ
    Կ͕෼͔Δ͔ʁ
    

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52. ·ͱΊ
    • ࠓޙυϝΠϯΛҭ͍ͯͯ͘ํ޲ੑ͕ݟ͑
    ͨ
    • ࣗ෼ͨͪͷγεςϜ๊͕͑ΔυϝΠϯͷ
    ཧղ͕ਂ·ͬͨ
    • ݱ࣮Λ஌ͬͨ
    

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53. ࠓޙ΍͍ͬͯ͘͜ͱ
    • ֤ਓͰ࢝Ί͍࣮ͯͨ૷ͷ౷߹
    • ࣮૷ϨϕϧͰͷඪ४Խ
    • ʮڊେͳటஂࢠʯͱͷઓ͍͸ଓ͘
    

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54. ͓ΘΓ
    ͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠
    

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55. ࣮ࡍͷίʔυͷ঺հ
    

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56. class Period
    {
    public function shorten(DueDate $renewal_day)
    {
    if (!$this->canShorten($renewal_day)) {
    throw new \OutOfRangeException("࣍ճߋ৽೔͕༗ޮͳൣғʹ͋Γ·ͤΜɻ");
    }
    return new Period($this->startDay, $renewal_day);
    }
    public function canShorten(DueDate $renewal_day)
    {
    $candidate = $this->candidateShortenPeriod();
    return $candidate->includes($renewal_day);
    }
    public function candidateShortenPeriod()
    {
    // ݄࣍ͷ1೔ʙݱࡏͷ࣍ճߋ৽೔·Ͱ͕୹ॖͷީิ
    return new static(
    new DueDate(new \DateTimeImmutable('first day of next month')),
    $this->renewalDay()
    );
    }
    public function includes(DueDate $renewal_day)
    {
    return
    ($renewal_day == $this->startDay || $renewal_day->after($this-
    >startDay)) &&
    ($renewal_day == $this->renewal_day || $renewal_day->before($this-
    >renewal_day));
    }
    }
    

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