Firestore で CQRS やってみた

Transcript

1. Firestore Ͱ CQRS ΍ͬͯΈͨ
   Firebase Meetup #13 @DeNA
   

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2. Kinjo Yuji
   iOS Engineer
   Twitter: @_yukin01
   GitHub: @yukin01
   

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3. ɾσʔλϞσϦϯά͕೉͍͠ͱ͍͏࿩
   ɾ࣮ࡍʹ΍ͬͯΈΔ
   ɾCQRS ͕࢖͑Δ͔΋͠Εͳ͍
   ɾ·ͱΊ
   ͜Μͳ࿩Λ͠·͢
   

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4. ϦϨʔγϣϯγοϓͲ͏දݱ͍ͯ͠·͔͢ʁ
   

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5. Top-level Collection or Sub Collection
   collection("posts")
   .where("room_id", "==", "room_001")
   .orderBy("createdAt", "desc")
   collection("rooms")
   .doc("room_001")
   .collection("posts")
   .orderBy("createdAt", "desc")
   Top-level collection
   Sub collection
   

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6. Sub collection
   Map (Array) or Sub Collection
   

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7. ͍ΖΜͳཁૉͰܾ·ͬͯ͘Δʢઈରղ͸ͳ͍
   ɾଟॏ౓ => 1 : 1, 1 : n, n : n
   ɾ਌ࢠυΩϡϝϯτͷϥΠϑαΠΫϧ
   ɾΫΤϦ
   ɾॻ͖ࠐΈͷ੍ݶ
   document => 1 times/s
   collection => 500 times/s
   ɾetc.
   

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8. Firestore ͰͰ͖Δ͜ͱࣗମ૿͍͑ͯΔ
   ɾarrayUnion/array-contains
   ɾincrement
   ɾCollection Group
   ʢΩϟονΞοϓେมʣ
   

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9. ࠷ۙࢥ͏͜ͱ
   ϢʔεέʔεʢͲ͏͍͏σʔλΛऔಘɾߋ৽͍͔ͨ͠ʣ
   ʹΑͬͯ
   ࠷దͳσʔλߏ଄͕ܾ·Δʢ࠷దղ͸͋Δ
   =>
   ߏ଄ʹΑͬͯ͸σʔλͷऔಘɾߋ৽͕
   ඇৗʹ೉͘͠ͳΔ͜ͱ΋…
   

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10. νϟοτػೳͷσʔλߏ଄Λߟ͑Δ
    

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11. ͜Μͳײ͡
    

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12. Contents
    - ϧʔϜ໊
    - ΞΠίϯը૾
    - ϝϯόʔ਺
    - ະಡ਺
    - ࠷৽ϝοηʔδ
    Conditions
    - ॴଐ͍ͯ͠ΔϧʔϜͷΈ
    - ౤ߘ࣌ؒͰιʔτ
    

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13. Contents
    - ϧʔϜ໊
    - ΞΠίϯը૾
    - ϝϯόʔ਺
    - ະಡ਺
    - ࠷৽ϝοηʔδ
    Conditions
    - ॴଐ͍ͯ͠ΔϧʔϜͷΈ
    - ౤ߘ࣌ؒͰιʔτ
    

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14. Contents
    - ϧʔϜ໊
    - ΞΠίϯը૾
    - ϝϯόʔ਺
    - ະಡ਺
    - ࠷৽ϝοηʔδ
    Conditions
    - ॴଐ͍ͯ͠ΔϧʔϜͷΈ
    - ౤ߘ࣌ؒͰιʔτ
    

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15. Contents
    - ϧʔϜ໊
    - ΞΠίϯը૾
    - ϝϯόʔ਺
    - ະಡ਺
    - ࠷৽ϝοηʔδ
    Conditions
    - ॴଐ͍ͯ͠ΔϧʔϜͷΈ
    - ౤ߘ࣌ؒͰιʔτ
    

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16. Contents
    - ϧʔϜ໊
    - ΞΠίϯը૾
    - ϝϯόʔ਺
    - ະಡ਺
    - ࠷৽ϝοηʔδ
    Conditions
    - ॴଐ͍ͯ͠ΔϧʔϜͷΈ
    - ౤ߘ࣌ؒͰιʔτ
    

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17. Contents
    - ϧʔϜ໊
    - ΞΠίϯը૾
    - ϝϯόʔ਺
    - ະಡ਺
    - ࠷৽ϝοηʔδ
    Conditions
    - ॴଐ͍ͯ͠ΔϧʔϜͷΈ
    - ౤ߘ࣌ؒͰιʔτ
    

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18. ·ͣ͸γϯϓϧʹ
    

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19. ɾϧʔϜ໊ɺ
    ΞΠίϯը૾ɺ
    ϝϯόʔ਺
    ɾarray-contains ͷΫΤϦ
    ɾະಡ਺Ͳ͏͢Δ…ʁ
    

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20. ɾະಡ਺
    ࠷৽ϝοηʔδ
    ɾཁ݅͸ຬͨͤΔ
    ɾWrite ͷ੍ݶ͕…"
    (unreadCount ʹूத͢Δ)
    

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21. ɾSub Collection Խ
    ɾཁ݅͸ຬͨͤΔ
    ɾ1ճͷΫΤϦͰ
    औಘͰ͖ͳ͍
    Rooms => Members
    => Messages
    

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22. ɾJOIN ͢Δύλʔϯ
    ɾਖ਼نԽ
    ɾΫϥΠΞϯταΠυ JOIN
    ɾ͍ΘΏΔ N+1 ໰୊ ʢઈରμϝͱ͍͏Θ͚Ͱ͸ͳ͍ʣ
    ɾJOIN ͠ͳ͍ύλʔϯ
    ɾඇਖ਼نԽ
    ɾඞཁͳσʔλΛ৑௕Խʢίϐʔʣ͢Δ
    ɾRDB Ͱ͸ߟ͑ʹ͍͕͘ NoSQL Ͱ͸Ұൠత
    

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23. ɾJOIN ͢Δύλʔϯ
    ɾਖ਼نԽ
    ɾΫϥΠΞϯταΠυ JOIN
    ɾ͍ΘΏΔ N+1 ໰୊ ʢઈରμϝͱ͍͏Θ͚Ͱ͸ͳ͍ʣ
    ɾJOIN ͠ͳ͍ύλʔϯ
    ɾඇਖ਼نԽ
    ɾඞཁͳσʔλΛ৑௕Խʢίϐʔʣ͢Δ
    ɾRDB Ͱ͸ߟ͑ʹ͍͕͘ NoSQL Ͱ͸Ұൠత
    <= ࠾༻ͯ͠ΈΔ
    

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24. ඇਖ਼نԽʢίϐʔʣͷ࣮ݱํ๏
    ɾTransaction or Batch Write
    ɾAtomic ͳॻ͖ࠐΈΛ࣮ݱ
    ɾ࠷େ 500 ݅ͷ੍ݶ͋Γ
    ɾFirestore Trigger
    ɾ݁Ռ੔߹ੑ
    ɾΤϥʔॲཧɺϦτϥΠॲཧͷඞཁੑ
    

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26. ͚ͩ͜͜ݟΕ͹ྑ͍
    

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27. Trigger functions
    

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28. Trigger functions
    

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29. Trigger functions
    

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30. Batch Write
    

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31. ϐλΰϥεΠον
    

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32. CQRS
    (Command Query Responsibility Segregation)
    Command (ߋ৽ܥ) ͱ Query (ࢀরܥ) ͰػೳΛ෼ׂ
    DDD ͷจ຺ͰޠΒΕΔ͜ͱ͕ଟ͍
    ES (Event Sourcing)
    ʮঢ়ଶʯͰ͸ͳ͘ʮΠϕϯτʯΛه࿥͍ͯ͘͠ߟ͑ํ
    ೚ҙͷঢ়ଶ͸ΠϕϯτΛ࠶ੜ͢Ε͹࠶ݱͰ͖Δ
    CQRS ͱ૊Έ߹ΘͤͰΑ͘ޠΒΕ͍ͯΔ
    

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33. h"ps://www.slideshare.net/AmazonWebServices/
    srv301op=mizing-serverless-applica=on-data-=ers-with-amazon-dynamodb
    

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34. https://www.slideshare.net/AmazonWebServices/
    srv301optimizing-serverless-application-data-tiers-with-amazon-dynamodb
    

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35. Command ଆ͸Πϕϯτ͚ͩΛه࿥ (ཁ͸Create ͷΈ)
    => ׬ᘳʹ࣮ݱ͢Δͷ͸΍Ί͓ͯ͘
    σʔλͷྲྀΕΛҰํ޲ʹ͢Δͱ͜ΖΛऔΓೖΕΔ
    

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36. ͜͏͍͏Πϝʔδ
    

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38. ɾਖ਼نԽ
    ɾηΩϡϦςΟϧʔϧͰ
    Write ͷΈڐՄ
    ɾ΄΅ RDB ͷײ֮
    

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39. ɾඇਖ਼نԽ
    ɾηΩϡϦςΟϧʔϧͰ
    Read ͷΈڐՄ
    ɾΫϥΠΞϯτͷॲཧָ͕
    ɾཁ݅มߋʹରԠ͠΍͍͢
    

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40. Trigger functions
    Command -> Query
    ͷҰํ޲
    

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41. ·ͱΊ
    - Firestore + Functions Ͱ CQRS ΛऔΓೖΕͨ
    σʔλϞσϦϯάΛ࣮૷
    - Command ͱ Query Ͱ׬શʹ෼཭
    - ϐλΰϥεΠονΛҰํ޲ʹͰ͖Δ
    - ͕
    - ঢ়ଶ͕ଟ͘ɺRead ͕සൟͳϢʔεέʔεͰ͸
    ༗ޮ͔΋
    

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