取引ドメインでの取り組み / mercari transaction domain

2021/12/16(木)
メルカリBackendエンジニア、次の一手とは？Microservice化を振り返る
Microservice化の裏側と、新しい課題、そしてRFSへ
https://mercari.connpass.com/event/232504/

Transcript

1. 1 औҾυϝΠϯͰͷऔΓ૊Έ Yuichi Takada 2021/12/16
2. 2 Engineering Manager, Mercari JP Yuichi Takada
3. 3 νʔϜʹ͍ͭͯ ໨࣍ ·ͣ΍ͬͨ͜ͱ ݟ͖͑ͯͨ՝୊ͱ͜Ε͔ΒͷऔΓ૊Έ ·ͱΊ 02 03 04 01
4. 4 νʔϜʹ͍ͭͯ
5. 5 Transaction team • औҾυϝΠϯΛѻ͏νʔϜ • 2021೥10݄ʹൃ଍ • ࠷ॳ͸υϝΠϯ஌ࣝͷগͳ͍ϝϯόʔ͕΄ͱΜͲ
6. 6 Transaction team • ঎඼ߪೖ͔ΒऔҾ׬ྃ·ͰͷҰ࿈ͷϫʔΫϑϩʔͷ؅ཧ • औҾΛαϙʔτ͢Δػೳ ◦ औҾϝοηʔδ ◦ औҾΩϟϯηϧ • endpoint ΋ DB ΋ɺ·ͩ׬શʹ Monolith ͷதʹ͋Δ औҾυϝΠϯͱ͸
7. 7 Transaction team • ܾࡁ (Payment) • Ϋʔϙϯ (Coupon) • ഑ૹ (Shipping) • ձܭ (Accounting) • ௨஌ (Notification) • ঎඼ (Item) • ͳͲͳͲ ؔ࿈͢ΔଞυϝΠϯʢଞνʔϜʣ
8. 8 Transaction team • υϝΠϯ஌ࣝΛ֫ಘ͢Δඞཁੑ • ՝୊Λਖ਼͘͠ཧղ͢Δඞཁੑ νʔϜ͕ελʔτͨ͠͹͔Γͷࠒ
9. 9 ·ͣ΍ͬͨ͜ͱ
10. 10 ·ͣ΍ͬͨ͜ͱ Domain code ྠಡձ
11. 11 Domain code ྠಡձ • ٕज़ॻͷྠಡձͷΑ͏ͳܗࣜ • औҾυϝΠϯͷ࣋ͭΤϯυϙΠϯτΛҰͭͣͭऔΓ্͛Δ ◦ 30 major endpoints & 20 minor endpoints What
12. 12 Domain code ྠಡձ • طଘΛཧղ͢Δ͜ͱ ◦ ࣮૷ ◦ ґଘ͍ͯ͠Δ table ΍ microservices ◦ ΤϯυϙΠϯτͷར༻͞ΕΔγφϦΦ ◦ ো֐࣌ͷӨڹ ◦ Code ͷվળ఺ • ࣮ࡍͷϦϑΝΫλϦϯά΍ઃܭ͸είʔϓ֎ Goal
13. 13 Domain code ྠಡձ • υϝΠϯ஌ࣝ • υϝΠϯ΁ͷ Ownership • Onboarding ίϯςϯπ • ࣍ʹऔΓ૊Ή՝୊ ಘΒΕͨ͜ͱ
14. 14 ݟ͖͑ͯͨ՝୊ͱ͜Ε͔ΒͷऔΓ૊Έ
15. 15 ݟ͖͑ͯͨ՝୊ͱ͜Ε͔ΒͷऔΓ૊Έ 1. ଞυϝΠϯͱͷෳࡶͳґଘؔ܎ ◦ ଞυϝΠϯͷϩδοΫ͕औҾυϝΠϯͷΫϥε಺ʹଘࡏ ◦ ଞυϝΠϯͷίʔυ͕औҾυϝΠϯͷ಺෦Ϋϥεʹґଘ 2. ڊେͳऔҾυϝΠϯ ◦ 50 endpoints ◦ 70 tables ݟ͖͑ͯͨ՝୊
16. 16 ݟ͖͑ͯͨ՝୊ͱ͜Ε͔ΒͷऔΓ૊Έ 1. ଞυϝΠϯͱͷෳࡶͳґଘؔ܎ 2. ڊେͳऔҾυϝΠϯ ݟ͖͑ͯͨ՝୊
17. 17 ଞυϝΠϯͱͷෳࡶͳґଘؔ܎ Domain boundary violation detection
18. 18 Domain boundary violation detection • υϝΠϯͷڥքΛෆਖ਼ʹ·͙ͨґଘͷݕ஌ͷ࢓૊ΈΛ։ൃ ◦ https://github.com/mihaeu/dephpend ◦ https://github.com/nikic/PHP-Parser ◦ Shopify ͷ Wedge Λࢀߟʹ What
19. 19 Domain boundary violation detection • Afferent Couplings (Ca) ◦ ଞυϝΠϯ͔Βͷґଘ • Efferent Couplings (Ce) ◦ ଞυϝΠϯ΁ͷґଘ What
20. 20 Transaction package Shipping package Notification package A B C D E F Afferent Couplings(Ca) Efferent Couplings(Ce)
21. 21 Domain boundary violation detection • Afferent Couplings (Ca) ◦ ଞυϝΠϯ͔ΒऔҾυϝΠϯ΁ͷґଘ • Efferent Couplings (Ce) ◦ औҾυϝΠϯ͔ΒଞυϝΠϯ΁ͷґଘ
22. 22 Domain boundary violation detection • ґଘؔ܎Λ਺஋Խ͠ɺϦϑΝΫλϦϯάͷࢦඪͷҰͭʹ͢ΔͨΊ • ଞνʔϜͷमਖ਼ʹΑΔ violation ͷมԽΛݕ஌͢ΔͨΊ Why
23. 23 ݟ͖͑ͯͨ՝୊ͱ͜Ε͔ΒͷऔΓ૊Έ 1. ଞυϝΠϯͱͷෳࡶͳґଘؔ܎ 2. ڊେͳऔҾυϝΠϯ ݟ͖͑ͯͨ՝୊
24. 24 ڊେͳऔҾυϝΠϯ औҾυϝΠϯͷ෼ׂ
25. 25 औҾυϝΠϯͷ෼ׂ • औҾυϝΠϯΛ͍͔ͭ͘ͷ component ʹ෼͚Δ • ֤ component Λૄ݁߹Խ What
26. 26 औҾυϝΠϯͷ෼ׂ • औҾυϝΠϯ͸େ͖͍ ◦ 50 endpoints ◦ CRUD 70 tables • ฒߦ։ൃΛՄೳʹ͠ɺ։ൃͷੜ࢈ੑΛߴΊΔ Why
27. 27 ·ͱΊ
28. 28 ·ͱΊ • Domain code ྠಡձ • Domain boundary violation detection • औҾυϝΠϯͷ෼ׂ औΓ૊Έ
29. 29 ·ͱΊ • 10 ݄͔Βൃ଍͠ɺ3ϲ݄໨ • ׆ಈΛ௨ͯ͠νʔϜͱͯ͠੒௕ ◦ ՝୊͸վળͷνϟϯε • औҾ͸ෳࡶͰॏཁͳυϝΠϯ ◦ ೉͠͞ͱ͓΋͠Ζ͕͋͞Δ νʔϜͷݱࡏ
30. 30 Thank you!