なぜ変更を検知できるDBが必要なのか

Transcript

1. ͳͥมߋΛݕ஌Ͱ͖ΔDB ͕ඞཁͳͷ͔

2. ؆୯ͳࣗݾ঺հ • อࡔ ॣ • ৽ଔҰ೥໨ • ݸਓࣄۀओ • Twitter:

   @Reyurnible • https://github.com/Reyurnible

3. ࠓ೔͸ɺDBΛ࢖ͬͯΞϓϦ಺ͷΠϕϯ τ΍ΩϟογϡΛྑ͘͢Δ͔΋͠Εͳ ͍࿩

4. ͦ΋ͦ΋ɺσʔλϕʔε࢖͍ͬͯ·͢ ͔ʁ

5. ελʔτΞοϓͱσʔλϕʔε • ࣮૷ίετ͕ߴ͍ • ϚΠάϨʔγϣϯͱ͔΍΍͍͜͠ • APTͰམͪͨΓΑ͘Θ͔Βͳ͍ΤϥʔʹҾ͔͔ͬΓ͕ͪ • εϨουͷ੍໿ͳͲɺAPIҎ্ʹ໘౗ •

   ϥΠϒϥϦଟͯ͘ͲΕ͕͍͍ͷ͔Θ͔Βͳ͍ -> ͋·Γ࣮૷ͨ͘͠ͳ͍

6. σʔλϕʔεΛ࣮૷͠ͳͯ͘͸͍͚ͳ͍έʔε • ϩʔΧϧͰ࣋ͬͯஔ͔ͳ͚Ε͹͍͔Ͷ͍৘ใ͕͋Δ • ͦ΋ͦ΋αʔόʔ͕ͳ͍ɺAPI͕ͳ͍

7. ࠓ೔σʔλϕʔεͰ΍Γ͍ͨ͜ͱ • ը໘ؒͷσʔλอ࣋ • ը໘ؒͷΠϕϯτॲཧ • ը໘෮ؼ࣌ͷσʔλॲཧ • σʔλͷΩϟογϡ ->

   Ͳ͏͍ͯ͠·͔͢ʁ

8. ελʔτΞοϓͩͱ • σβΠϯͰղܾ • ը໘දࣔ͝ͱʹߋ৽ • αϙʔτ͠ͳ͍ -> ࣮૷͠ͳ͍͍ͯ͘ͷ͕Ұ൪͍͍

9. ͪΌΜͱαϙʔτΛ͠ͳ͍ͱ͍͚ͳ͘ ͳͬͨ࣌ͷ࿩

10. ͦ΋ͦ΋DBͰͲ͏ղܾ͢Δͷ͔

11. σʔλϕʔεͰ΍Γ͍ͨ͜ͱ • ΞϓϦͷΩϟογϡ • ຖىಈ͝ͱͷηογϣϯ৘ใͷ؅ཧ • ΠϕϯτPubSubతͳ΍ͭ

12. DBܥϥΠϒϥϦͷτϨϯυ

13. ੲ͔Β͋ΔORMϥΠϒϥϦ • SQLite • ActiveAndroid • GreanDAO

14. ࠷ۙͷORMϥΠϒϥϦ΍DB • Room • Realm • Requery • SQL Brite

15. google / Room • Room provides an abstraction layer over

    SQLite to allow fluent database access while harnessing the full power of SQLite • https://developer.android.com/topic/libraries/architecture/ room.html • RxJavaରԠ • LiveDataରԠ

16. square / SQL Brite • A lightweight wrapper around SQLiteOpenHelper

    which introduces reactive stream semantics to SQL operations. • ⭐ 4100 • https://github.com/square/sqlbrite • RxJavaରԠ

17. realm / Realm • mobile database: a replacement for SQLite

    & ORMs • ⭐ 8000 • https://github.com/realm/realm-java • RxJavaରԠ

18. requery / requery • modern SQL based query & persistence

    for Java / Kotlin / Android • ⭐ 2000 • https://github.com/requery/requery • RxJavaରԠ

19. ײ͍ͯ͡ΔτϨϯυ • RxJavaରԠ • ςʔϒϧͷมߋͷݕ஌ • KotlinରԠ

20. ςʔϒϧͷมߋΛݕ஌Ͱ͖ΔDBͱ͸ • INSERT, UPDATE, DELETEͳͲɺσʔλϕʔεʹมߋ͕͋ͬ ͨࡍʹΠϕϯτ௨஌Λͯ͘͠ΕΔ͜ͱ • RxJavaʹରԠ͍ͯ͠Δ͔͕1ͭͷ伴 -> ͜ΕΛઃܭʹ૊ΈࠐΉͱͲ͏ͳΔ͔ɻ

21. None
22. None

23. ίετΛͲ͏཈͑Δ͔ • LocalSourceͱɺContentProviderΛΦϯϝϞϦͰ࣮૷͓ͯ͠ ͘ • ୯७ͳBehaviroSubject΍LiveDataͳͲ • ͦͷޙɺ༨༟͕Ͱ͖ͨλΠϛϯάͰஔ͖׵͑Λߦ͏ • ΞϓϦىಈ࣌ʹςʔϒϧͷ಺༰Λɺશͯഁغ͢Δ

    • API͕͋Γɺηογϣϯ಺ͷ৘ใ͚ͩͰ͍͍৔߹

24. ·ͱΊΔͱ • ࠷ۙͷDB͸ɺσʔλͷมߋΛݕ஌Ͱ͖Δ • DBͷ࣮૷͕ਏ͍৔߹͸ɺΦϯϝϞϦʔͰ΋͍͍ • Ͱ΋ɺσʔλͷϑϩʔΛม͑ΒΕΔ༨஍Λ࢒͓ͯ͘͠

25. ؔ࿈ϦϯΫ • googlesamples/android-architecture • RxJava + FluxʹΑΔAndroidΞϓϦઃܭ • SQLBrite͕ςʔϒϧมߋΛ௨஌͢Δ࢓૊Έ