ドメイン駆動設計を軽快に実践するための工夫

DDD関西.java 3/5(土) 発表資料

Transcript

1. υϝΠϯۦಈઃܭΛ
   ܰշʹ࣮ફ͢ΔͨΊ
   ͷ޻෉
   2016/3/4 ؔ੢DDD.java
   @haljik
   

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2. ࣗݾ঺հ
   Տ্ ੖࢘(͔Θ͔Έ ͍ͤ͡ʣ
   @haljik
   ϑϦʔϥϯεJavaΤϯδχΞ
   4 ؔ੢DDD.javaओ࠵
   4 ؔ੢JavaΤϯδχΞͷձϝϯόʔ
   4 DDDΞϥΠΞϯεൃىਓϝϯόʔ
   

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3. ࠓ೔࿩͢͜ͱ
   4 ॏް͞ͱܰշ͞
   4 Ϟσϧ΁ͷϑΟʔυόοΫɾϧʔϓ
   4 ϚΠϒʔϜ
   4 ࠷ۙͷ՝୊
   

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4. ࠓ೔࿩͞"ͳ͍"͜ͱ
   4 ϓϩδΣΫτॳظͷ׆ಈ
   ͓͓Αͦͷۀ຿Πϝʔδ΍ɺγεςϜͷશମ
   ૾ɺࠎ֨ͱͳΔ༻ޠ͸ΠϯϓοτࡁΈͰɺ
   ͋Δఔ౓ͷू໿ϧʔτ͕ݟ͍͑ͯΔ͙Β͍ͷঢ়
   ଶΛલఏͱ͓ͯ͠ฉ͖͍ͩ͘͞ɻ
   

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5. എܠ
   4 WebΞϓϦέʔγϣϯ։ൃ
   4 Java
   4 Spring Boot
   4 Thymeleaf
   4 MyBatis
   H2database & PostgreSQL
   4 ։ൃϝϯόʔ͸࠷େͰ΋10ਓ͙Β͍ͷن໛ײ
   

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6. ࢲ͕ࢥ͏ॏް͞
   4 ϞσϧਤΛ͔ͬ͠Γॻ͘
   4 ৗʹϞσϧਤΛߋ৽͢Δ
   4 ϞσϧਤͰυϝΠϯΤΩεύʔτͱձ࿩
   

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7. ॏް͞ͷ໰୊
   4 ϞσϧਤͰձ࿩ͯ͘͠ΕΔυϝΠϯΤΩεύʔ
   τ͍ͬͯΔͷ?
   4 ී௨υϝΠϯΤΩεύʔτͬͯ๩͍͠ਓͩΑ
   Ͷ?
   4 ͦ΋ͦ΋υϝΠϯΤΩεύʔτ͕͍ͳ͍
   4 ϞσϧਤΛৗʹ࠷৽ʹߋ৽͢Δ࣌ؒ͋ΔͳΒί
   ʔυॻ͖͍ͨ
   

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8. ࢲ͕ࢥ͏ܰշ͞
   4 ݪଇίʔυϑΝʔετ
   4 ϞσϧਤΛؚΉυΩϡϝϯτྨ͸εφοϓγϣ
   οτͱͯ͠ॻ͘͜ͱ͸͋Δ
   4 υϝΠϯΤΩεύʔτΛ଴ͨͳ͍
   4 ސ٬ɺར༻ऀ͔ΒͷϑΟʔυόοΫ͸ಈ͘UI͔
   ΒͰྑ͠ͱ͢Δ
   

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9. ཁ͸ϞσϧΛચ࿅͍ͤͯ͞
   ͨ͘Ίͷૉૣ͍ϑΟʔυό
   οΫϧʔϓΛͲͷΑ͏ʹߏங
   ͢Δͷ͔
   4 ࣗ෼ୡͰճͤΔϧʔϓ͸ࣗ෼ୡͰճ͢
   4 ૣ͘খ͘͞ճ͢
   

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10. ۩ମతʹͲ͏͍ͯ͠Δ͔
    

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11. ϑΟʔυόοΫɾϧʔϓΛ
    ࢧ͑Δ׆ಈͷશମ૾
    

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13. ྫɿ৽͍͠ू໿ϧʔτͱ͠
    ͯʮར༻ऀʯΛ௥Ճ͢Δ
    

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14. લఏͱͳ͍ͬͯΔ։ൃελΠϧ
    4 ू໿ϧʔτ͕։ൃͷجຊ୯Ґ
    4 ू໿ϧʔτʹରͯ͠Ϣʔεέʔε͕͋Δ
    4 ྫ͑͹ར༻ऀͩͱɺ৽نొ࿥ɺϓϩϑΟʔ
    ϧมߋ etc.
    

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15. 1. ू໿ϧʔτͷ࣮૷
    4 ू໿ͱͦͷID͙Β͍
    public class User {
    UserId id;
    }
    public class UserId {
    String value;
    }
    

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16. 2. ϢʔεέʔεͷςετΛॻ͘
    @Autowired
    UserRegisterService service;
    def "ར༻ऀΞΧ΢ϯτͷ৽نొ࿥"() {
    given:
    def newUser = new User();
    when: "ొ࿥͢Δ"
    service.register(newUser);
    then: "ొ࿥Ͱ͖Δ"
    noExceptionThrown();
    }
    

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17. 3. ϢʔεέʔεΛ࣮૷͢Δ
    @Service
    public class UserRegisterService {
    @Autowired
    UserRepository repository;
    public void register(User user) {
    repository.register(user);
    }
    }
    

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18. 4. σʔλιʔεͷ࣮૷
    public interface UserRepository {
    void register(User user);
    }
    @Repository
    public class UserDataSource implements UserRepository {
    //...ུ
    }
    

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19. 5. ϓϨθϯςʔγϣϯͷ࣮૷
    @Controller
    public class UserRegisterController {
    //ొ࿥ը໘ͷදࣔ
    //ొ࿥
    }
    Ϣʔβʔొ࿥
    
    
    
    

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20. ͜ͷঢ়ଶͰ͸εοΧ
    εΧʹݟ͑Δ…
    

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21. ͦΕͰ΋࠷ॳʹ͜ͷ
    ঢ়ଶͰಈ͔͢͜ͱΛ
    ໨ࢦ͢
    

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22. ͦͯ͜͠ͷʮಈ͘ঢ়ଶʯΛ
    ʮҡ࣋ʯ͠ͳ͕Β2ʙ5·ͰΛ܁Γฦ͢
    

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23. ʮಈ͔ͳ͍ঢ়ଶʯ
    = ϑΟʔυόοΫ·Ͱ͕௕͍
    

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24. ʮಈ͘ঢ়ଶʯ
    = ϑΟʔυόοΫ·Ͱ͕୹͍
    

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25. ಘΒΕΔϑΟʔυόοΫ
    

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26. 1. ू໿ϧʔτͷ࣮૷
    4 ͜ͷ࣌఺Ͱ͸ͳʹ΋ϑΟʔυόοΫ͕ͳ͍ɻ
    

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27. 2. ςετΛॻ͘
    4 ॳճͷϑΟʔυόοΫ͸΄΅ͳ͍
    4 Ϣʔεέʔεͷҙຯ͕ϝιου໊ʹݱΕΔ͔ʁ
    ͱ͔
    4 Πϯελϯεੜ੒͸newͰྑ͍Μ͚ͩͬʁԿ͕
    ඞཁʹͳΔΜ͚ͩͬʁ
    ͱ͔࣮૷ͷࢦ਑Έ͍ͨͳؾ͖ͮ͸݁ߏ͋Δ
    

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28. 3. ϢʔεέʔεΛ࣮૷
    4 ॳճͷϑΟʔυόοΫ͸΄΅ͳ͍
    4 ͜͜ͰϞσϧͷ࢖͍উख͕Θ͔Δ
    4 Ϣʔεέʔε͕ෳࡶԽͯ͘͠Δͱۀ຿஌͕ࣝᷓ
    Εग़ͯ͠·͏ࣄ͕ଟ͍
    

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29. 4. σʔλɾιʔε૚ͷ࣮૷
    4 DB͔ΒͷϑΟʔυόοΫ
    4 ͜͜΋࠷ॳ͸ϑΟʔυόοΫ͸ͳ͍
    4 Կ͔͋Δ৔߹͸ϞσϧʹͱͬͯϚΠφεͷϑ
    ΟʔυόοΫʹͳΓ͕ͪ...
    4 Ͱ΋σʔλͷϥΠϑαΠΫϧΛͲ͏͢ΔΜ
    ͚ͩͬʁͱ͔ͦ͏͍͏ؾ෇͖͸͋Δ
    

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30. 5. ϓϨθϯςʔγϣϯ૚ͷ࣮૷
    4 UI͔ΒͷϑΟʔυόοΫ
    4 ࠷ॳͷঢ়ଶͰ͸ͦΜͳʹϑΟʔυόοΫ͸
    ͳ͍
    4 Ϟσϧʹߏ଄͕ग़ͯ͘ΔͱɺͦΕΛHTML
    ʹ൓өͤ͞Δͱ͖ʹҧ࿨ײΛײͨ͡Γ
    4 ϓϩάϥϚʔҎ֎ͷਓ͔ΒϑΟʔυόοΫ
    ͕΋Β͑Δ <-ॏཁ
    

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31. ίʔυ͔Β͸ಘΒΕͳ͍΋ͷ
    4 ू໿Λލ͙၆ᛌࢹ఺͔Βͷҧ࿨ײ΍ෆ੔߹
    ※ਂ͍Ϟσϧʹ౸ୡ͢Δʹ͸ඞཁʹࢥ͑Δ
    ͜͜͸໛ࡧத
    4 શମΛ௨͢γφϦΦςετΛॻ͍͓ͯ͘ͱ͔
    4 Ϗϧυ͢ΔͱԿ͔ਤΛੜ੒͢Δͱ͔
    

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32. ॏཁͳ͜ͱ
    

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33. ϓϩάϥϚʔҎ֎ͷਓ͔Β
    ϑΟʔυόοΫ͕΋Β͑Δঢ়ଶΛ
    ૣ͘࡞ͬͯҡ࣋͢Δࣄ
    

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34. ࠷ॳ͸ශ݂঱Ͱ΋ྑ͍
    ࿙ΕͰͨۀ຿஌ࣝΛޙ͔ΒͰ΋
    υϝΠϯϞσϧʹ໭ͤΔΑ͏ʹ࡞Δ
    

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35. ։ൃऀ͸ۀ຿஌ࣝΛϞσϧ
    ʹڽू͍ͤͯ͘͞աఔͰͦ
    ͷυϝΠϯʹର͢ΔཧղΛ
    ਂΊΔ
    

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36. ͦΕ͕ਂ͍Ϟσϧ΁ͷ଍͕
    ͔ΓʹͳΔ
    

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37. ؓ࿩ٳ୊
    

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38. ϚΠϒʔϜ(ࢮޠ?)
    

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39. ෳ਺ͷू໿Λࢀর͢Δू໿ϧʔτͷ෮ݩ
    

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40. ྫ͑͹
    ޏ༻อݥՃೖ৚݅ͱ͍͏ू໿ϧʔτΛ෮ݩ͍ͨ͠
    4 Ұिؒͷबۀ͕࣌ؒ߹ܭ20࣌ؒҎ্
    4 Ұϲ݄ͷबۀ͕࣌ؒ߹ܭ87࣌ؒҎ্
    4 बۀظ͕ؒ31೔Ҏ্
    4 னֶؒੜͰ͸ͳ͍
    4 ޏ༻։࢝࣌఺Ͱ65ࡀະຬ
    

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41. ඞཁͳଞͷू໿
    * ඃޏ༻ऀͷۈ຿৚݅
    Ұिؒ͋ͨΓͷबۀ࣌ؒ
    Ұϲ݄͋ͨΓͷबۀ࣌ؒ
    * ඃޏ༻ऀͷݸਓ৘ใ
    னֶؒੜ͔Ͳ͏͔
    ೥ྸ
    

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42. Ͳ͏͍͏࣮૷͕ߟ͑ΒΕΔ͔ʁ
    1. ΞϓϦέʔγϣϯαʔϏεͰ
    ଞͷू໿ͷαʔϏεΛݺͿʁ
    2. ޏ༻อݥՃೖ৚݅ͷϦϙδτϦͰ
    ଞͷू໿ͷϦϙδτϦΛݺͿʁ
    3. SQLͰ·ͱΊͯऔͬͯ͘Δʁ
    

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43. ࠷ۙ͸1
    4 ΍͸Γू໿ͷϑΝαʔυ͸ΞϓϦέʔγϣϯα
    ʔϏεʹͳ͍ͬͯΔͷ͕ࣗવʹײ͡Δ
    4 ࢀর͍ͯ͠Δू໿͕ޙ͔ΒผίϯςΩετڥք
    ͷ΋ͷͰ͋Δࣄ͕Θ͔ͬͯผϓϩηεͰಈ࡞͢
    ΔαʔϏεͱͳΔՄೳੑ͕͋Δ఺
    

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44. ू໿ϧʔτΛ෦෼ߋ৽͢ΔࡍͷӬଓԽ
    

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45. େମ͸ू໿ͷҰ෦͚ͩͷߋ
    ৽ཁ͕݅ൃੜ͢Δ
    ͍ΘΏΔλεΫϕʔεUI͸ݦஶʹͦ͏ͳΔɻ
    ू໿ϧʔτ͕࣋ͭάϩʔόϧͳࣝผࢠΛม͑Δ͜
    ͱͳ͘ɺ ഑ԼͷΤϯςΟςΟ͚ͩΛߋ৽͢Δτϥ
    ϯβΫγϣϯΛߦ͏έʔε͕ଟ͍
    

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46. Ͳ͏͍͏࣮૷͕ߟ͑ΒΕΔ͔ʁ
    1. ৗʹ·Δ͝ͱӬଓԽ͢Δʁ
    2. ߋ৽͢Δ෦෼͚ͩͷߋ৽ґཔʢ̋̋RequestΦ
    ϒδΣΫτʣΛ࡞Δʁ
    3. ू໿͔ΒDomainEventΛൃߦͯ͠Subscriber
    ͕ӬଓԽʁ
    

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47. ৔߹ʹΑΓҧ͏͚Ͳେମ̎
    4 ·Δ͝ͱӬଓԽ
    4 DataSourceʹ౉ͨ࣌͠఺Ͱ෦෼ߋ৽Ͱ͋
    Δ͜ͱͷจ຺͕ࣦΘΕ͕ͪ
    4 DomainEvent
    4 ໌ࣔతͳϏδωεϓϩηε͕ΠϕϯτΛܦ
    ༝͢Δ͜ͱͰӅΕͯ͠·͍ͦ͏
    4 Ͱ΋ΦϒδΣΫτࢦ޲తʹ͸ʮ໰͍߹Θͤ
    Δͳ໋͡Ζʯ͕Ͱ͖ͦ͏Ͱ΍ͬͯΈ͍ͨ
    

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48. 2ͷ࣮૷ྫ
    ར༻ऀϞσϧ
    public class User { //ར༻ऀ
    UserId id;
    ...
    Profile profile; //ݸਓ৘ใ
    ResponsibleArea area; //୲౰ΤϦΞ
    }
    

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49. 2ͷ࣮૷ྫ(ଓ͖)
    ݸਓ৘ใߋ৽࣌ͷґཔΦϒδΣΫτ
    public class ProfileUpdateRequest {
    User old; //ू໿ϧʔτΛ๊͑ͯ͠·͏
    Profile update;
    }
    ୲౰ΤϦΞߋ৽࣌ͷґཔΦϒδΣΫτ
    public class ResponsibleAreaUpdateRequest {
    User old; //ू໿ϧʔτΛ๊͑ͯ͠·͏
    ResponsibleArea area;
    }
    

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50. 2ͷ࣮૷ྫ(ଓ͖)
    ར༻ऀαʔϏε
    @Service
    public UserRegisterService {
    @Autowired
    UserRepository repository;
    public void register(User user) {
    repository.register(user); //ొ࿥͸·Δͬͱ
    }
    public void updateProfile(ProfileUpdateRequest request) {
    repository.register(request); //ϦϙδτϦ͸ΠϕϯτͷੵΈ্͛
    }
    public void updateResponsibleArea(ResponsibleAreaRequest request) {
    repository.register(request); //ϦϙδτϦ͸ΠϕϯτͷੵΈ্͛
    }
    }
    

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51. 2ͷ࣮૷ྫ(ଓ͖)
    σʔλϕʔε
    

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53. 2ͷ࣮૷ྫ(ଓ͖)
    Πϛϡʔλϒϧσʔλ
    4 Πϕϯτσʔλ͸ॻ͖׵͑ͳ͍
    4 ࠷৽Ϩίʔυͷ؅ཧ͚ͩΛߦ͏
    ར఺
    4 ӨڹൣғͷہॴԽ
    4 τϥϯβΫγϣϯʹཔΒͳͯ͘ྑ͍
    

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54. 1:N໰୊ͷղ͖ํ
    ྫɿٻਓ(1)ʹඥͮ͘஍Ҭ(N)͕͋Δ৔߹ʹɺٻਓ
    ҰཡΛऔಘ͢Δɻ
    1. SQLͰjoinͯ͠MyBatisͷResultMapͳͲͰ
    ্ख͘ٵऩͯ͠औಘ͢Δ
    2. JavaଆͰผ్औಘͯ͠ޙ͔ΒJoin͢Δɻ
    

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55. ࠷ۙ͸ՄೳͰ͋Ε͹2
    4 StreamAPIͷԸܙͰผʑʹऔಘ &
    GroupingBy & Ϛʔδ ͕؆୯
    4 Ͱ΋ϝϞϦޮ཰͸ѱ͍ͷͰStreamΛฦͯ͘͠
    ΕΔDomaʹ΋஫໨͍ͯ͠Δ
    

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56. ೖྗ஋ͷλΠϓϛεϚον໰୊
    ྫ: ಺෦ܕ͕IntegerͳͲ਺஋ܕͰ͋Δ৔߹
    4 ߲໨୯ҐͷόϦϡʔΦϒδΣΫτͷ಺෦ܕΛจ
    ࣈྻʹ͢Δ͜ͱͰղܾ͍ͯ͠Δ
    4 ͦ΋ͦ΋߲໨୯ҐͷܕΛ࡞ΔͷͰ಺෦ܕ͸ԿͰ
    ΋ྑ͍
    4 λΠϓϛεϚονΤϥʔͱೖྗݕূΤϥʔͷग़
    ΔλΠϛϯάͰফ໣͢Δ͙Β͍ͳΒจࣈྻͰ
    

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57. ࠷ۙͷٕज़త՝୊
    

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58. ࠷ۙͷٕज़త՝୊
    ೖྗ஋ͷόΠϯσΟϯά
    4 setter࡞Γͨ͘ͳ͍
    

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59. ࠷ۙͷٕज़త՝୊
    ೖྗͷݕূ
    4 λΠϛϯά͸UI૚ͷίϯτϩʔϥ͡Όͳͯ͘α
    ʔϏεͰ
    ※ݕূҧ൓Λྫ֎ͱͯ͠͠·͑͹εοΩϦ͢Δ
    4 એݴ͸Ϟσϧʹڽू͍ͤͨ͞
    ※BeanValidationͰ͋Δఔ౓͸࣮ݱ͍ͯ͠Δ
    

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60. ࠷ۙͷٕज़త՝୊
    ηΩϡϦςΟ
    4 ηΩϡϦςΟʹؔ͢Δ஌͕ࣝڽू͠ʹ͍͘
    4 Ϟσϧʹڽू্ͤͨ͞Ͱԣஅతʹద༻͍ͨ͠
    

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61. ࠷ۙͷٕज़త՝୊
    DB͔Βͷू໿ϧʔτ෮ݩ
    4 ςʔϒϧϚούʔͰ͸೉͍͠
    4 SQLͷ݁ՌηοτΛϚοϐϯά͍ͨ͠
    

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62. DB͔Βͷू໿ϧʔτ෮ݩ(ଓ͖ʣ
    ݱ࣌఺Ͱ૬ੑͷྑͦ͞͏ͳϑϨʔϜϫʔΫ
    4 Doma
    DomaͰݴ͏EntityΛ௚઀DomainϞσϧʹ͢
    Δ͜ͱ͸ͳ͍͚Ͳɺ DomaͷEntity͔Βू໿
    ϧʔτΛ෮ݩͬͯͷ͸༗Γͳؾ͕͍ͯ͠Δ
    4 SpringͷJdbcTemplate
    ͍Ζ͍Ζͱ͔ͿͤΕ͹͋Δ͍͸…
    

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63. DB͔Βͷू໿ϧʔτ෮ݩ(ଓ͖ʣ
    ΄͍͠ػೳ
    4 ࣮ߦίϯςΩετʹ͋ΔΦϒδΣΫτΛผͷΦ
    ϒδΣΫτͷϑΟʔϧυʹϚοϐϯά
    4 ϑΝΫτϦϝιουʹରԠ
    4 StreamΛฦ͢API
    4 ୯߲໨ValueObjectʹରԠ
    

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64. Ҏ্ɺ࠷ۙͷٕज़త՝୊Ͱͨ͠
    

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65. ࠷ޙʹ
    

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66. υϝΠϯϞσϧʹؔ৺ࣄΛຊ౰ʹڽूͤ͞Δʹ͸
    ·ͩ·ٕͩज़తͳ՝୊΍ඞཁͳϊ΢ϋ΢͕
    ͨ͘͞Μ͋Γ·͢ʂ
    ָ͠ΜͰ͍͖·͠ΐ͏ʂ
    

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67. ͋Γ͕ͱ͏͍͟͝·ͨ͠ʂ
    

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68. View Slide