DDD and Spring Boot

JJUG CCC 2018 Fallでの発表資料です。

Transcript

1. υϝΠϯۦಈઃܭͱ
   Spring BootΛ׆༻ͨ͠
   ΞϓϦέʔγϣϯ։ൃ
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2. ૝ఆ͢ΔϦεφʔ
   • Spring BootΛ৮ͬͨ͜ͱ͕͋Δ
   • DDDʹ͍ͭͯฉ͍ͨ͜ͱ͕͋Δ
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3. ࣗݾ঺հ: @zhanpon
   • 2017೥10݄ɿϠϑʔʹ৽ଔೖࣾ
   • 2018೥4݄ɿJava, Spring BootΛ࢖͍͸͡ΊΔ
   • 2018೥5݄ɿJJUG CCC 2018 SpringʹॳࢀՃ
   ձࣾͰͷओͳ׆ಈ
   • ਪનγεςϜͷ։ൃɾӡ༻
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4. DDDͱ͸Կ͔
   • υϝΠϯۦಈઃܭ (Domain-Driven Design) ͷུশ
   • Eric Evans ͷ "Domain-Driven Design: Tackling Complexity in the
   Heart of Software" ͱ͍͏ຊ͕ݩʹͳ͍ͬͯΔ
   • ෯޿͍࿩୊͕͋ͬͯҰݴͰ͸આ໌Ͱ͖ͳ͍
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5. ʢࢲʹͱͬͯʣDDDͱ͸Կ͔
   • ΦϒδΣΫτࢦ޲ϓϩάϥϛϯάΛݱ࣮ͷෳࡶͳγεςϜʹద
   ༻͢ΔͨΊͷํ๏࿦
   • SOLIDͳઃܭΛ࣮ݱ͢ΔͨΊͷσβΠϯύλʔϯʢ୯Ұ੹೚ͷݪ
   ଇɺ։์/ด࠯ͷݪଇ……ʣ
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6. Ξ΢τϥΠϯ
   1. DDDΛ΍ΔϞνϕʔγϣϯ
   2. DDDΛ࣮ફͨ͠ܦݧ
   3. ٕज़తͳTIPS
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7. Part I: DDDΛ΍ΔϞν
   ϕʔγϣϯ
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8. ࣦഊஊ
   • ۀ຿ΞϓϦέʔγϣϯΛSpring BootͷνϡʔτϦΞϧͷԆ௕Ͱ
   ࣮૷ͨ͠ΒͻͲ͍͜ͱʹͳͬͨ
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9. Α͋͘ΔSpring Bootͷ
   νϡʔτϦΞϧ
   1. ΤϯςΟςΟΛ࣮૷͢Δ
   2. ϦϙδτϦΛఆٛ͢Δ
   3. ίϯτϩʔϥʔΛ࣮૷͢Δ
   4. ׬੒ʂ
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10. ΤϯςΟςΟΛ࣮૷͢Δ
    @Entity
    public class User {
    @Id
    private String id;
    private String fullName;
    // getterͱsetter
    }
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11. ϦϙδτϦΛఆٛ͢Δ
    public interface UserRepository extends CrudRepository {
    }
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12. ίϯτϩʔϥʔΛ࣮૷͢Δ
    @RestController
    public class UserController {
    @Autowired
    UserRepository userRepository;
    @GetMapping("/users")
    public List allUsers() {
    return userRepository.findAll();
    }
    }
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13. ׬੒ʂ
    • ͋ͱ͸ UserController ʹϩδοΫΛॻ͍͍͚ͯ͹OK (?)
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14. ໰୊఺
    • UserΫϥεͷΧϓηϧԽ͸ʁ
    • UserController ͕ࡍݶͳ͘ෳࡶԽ͢Δ
    • ୯ମςετ͕ࠔ೉
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15. υϝΠϯϞσϧශ݂঱
    • ୯ͳΔखଓ͖ܕઃܭʹͳͬͯΔ
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16. Part II: DDDΛ࣮ફͨ͠
    ࣮ྫ
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17. ࣾ಺ͷϓϩδΣΫτ
    • ػցֶशͷ੒Ռ෺Λຖ೔ࣗಈͰσϓϩΠ͍ͨ͠
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18. φΠʔϒʹ࣮૷ͨ͠Β
    • ϦϙδτϦʹΞΫηε͢ΔΫϥε (DockerRegistryAccessor)
    ͱ࣮ߦ؀ڥʹσϓϩΠ͢ΔΫϥε (KubernetesDeployer) Λ༻
    ҙ͢Δ
    • DockerRegistryAccessor ͕࠷৽൛Λऔͬͯ͘Δ
    • KubernetesDeployer ͕ͦΕΛσϓϩΠ͢Δ
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19. φΠʔϒʹ࣮૷ͨ͠Β
    • ͱΓ࣮͋͑ͣ૷Ͱ͖ͦ͏ɻ͔͠͠΋ͬͱෳࡶʹͳͬͨΒʁ
    • UserControllerͷΑ͏ʹͲΜͲΜෳࡶʹͳΔ
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20. ૿͑Δཁ݅
    • ࣗಈσϓϩΠ͢Δ࣌ؒଳΛ੍ݶ͍ͨ͠
    • ٳ೔͸σϓϩΠΛېࢭ͍ͨ͠
    • ࠷৽൛͡Όͳͯ҆͘ఆ൛ΛσϓϩΠ͍ͨ͠
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21. υϝΠϯϞσϧΛݟग़͢
    • ιϑτ΢ΣΞγεςϜͷ͏ͪɺࣗ෼͕ݩʑղ͖͔ͨͬͨ໰୊Λ
    දݱ͢Δίʔυͷ઎ΊΔྔ͸গͳ͍
    • ͦͷ෦෼͕WebΞϓϦέʔγϣϯϑϨʔϜϫʔΫͳͲͷٕज़త
    ৄࡉʹຒ΋Εͳ͍Α͏ʹ͍ͨ͠
    • υϝΠϯ૚͕ٕज़తৄࡉʹґଘ͠ͳ͍Α͏ʹ͢Δ (DIP)
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22. ࠓճͷυϝΠϯϞσϧ
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23. Version
    • ఆظతʹੜ੒͞ΕΔػցֶशͷ੒Ռ෺ɻྫɿݘೣ෼ྨثͷ2018
    ೥12݄15೔9࣌όʔδϣϯ
    @Value
    public class Version {
    private final String modelName;
    private final Instant instant;
    }
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24. VersionSet
    • Setͷϥούʔ
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25. Policy
    public enum Policy {
    NONE((versions, t) -> Optional.empty()),
    LATEST((versions, t) -> {
    return versions.latest();
    })
    private BiFunction> policy;
    Policy(BiFunction> policy) {
    this.policy = policy;
    }
    }
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26. VersionCatalog
    public interface VersionCatalog {
    VersionSet list(String modelName);
    }
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27. Deployer
    public interface Deployer {
    void deploy(Version version);
    }
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28. ࢓༷มߋ
    • ػցֶशͷ੒Ռ෺ΛஷΊΔ৔ॴ͕Docker Registry͔ΒΦϒδΣ
    ΫτετϨʔδʹͳͬͨ
    !
    • VersionCatalog ͷ࣮૷ΫϥεΛม͑Δ͚ͩ
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29. DDDΛ΍ͬͯྑ͔ͬͨ͜ͱ
    • ࢓༷มߋָ͕
    • ςετ͕͠΍͍͢
    • ࣗ෼ͷ໰୊ʹର͢Δཧղ͕ίʔυͱͯ͠දݱ͞ΕΔ
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30. ࠷ޙʹ
    ͢΂ͯͷιϑτ΢ΣΞγεςϜ͸ɺεςʔΫϗϧμʔʹ2ͭͷҟͳ
    ΔՁ஋Λఏڙ͢ΔɻͦΕ͸ʮৼΔ෣͍ʯͱʮߏ଄ʯͰ͋Δɻ
    — Robert C. Martin
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31. ͓·͚
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32. Part III: ٕज़తͳTIPS
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33. ϓϩδΣΫτߏ੒
    • domainͱapplicationͱ͍͏2ͭͷGradleϓϩδΣΫτΛ࡞ͬͨ
    • domain͸Javaͷඪ४ϥΠϒϥϦʹ͔͠ґଘ͍ͯ͠ͳ͍
    • application͸domainʹґଘ͍ͯ͠Δɻத਎͸;ͭ͏ͷSpring Boot
    ΞϓϦέʔγϣϯ
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