circuit_switch: small start to create gem

at 2021.10.10. Kaigi on Rails _2021_ new

Transcript

1. DJSDVJU_TXJUDI 
 ͍ͪ࢝͘͞ΊΔ
   HFN
   ͮ͘Γ 2021.10.10. Kaigi on Rails _2021_ new @makicamel
2. w!NBLJDBNFM
   
   ઒ݪສق
   w3VCZ
   
   
   
   
   
   ͱϏʔϧɹɹͱ͓ञ͕޷͖
   w޷͖ͳ
   73
   ήʔϜ
   ࣗݾ঺հ
3. ࠷ۙࠔ͍ͬͯΔ͜ͱ ͓࢓ࣄͰ
4. ো֐͕ଟ͍
5. •ӨڹൣғௐࠪΛ͕Μ͹Ζ͏ •ϨϏϡʔΛ͕Μ͹Ζ͏ •ࣗಈςετͷ௥ՃɾϝϯςΛ͕Μ͹Ζ͏ •खಈςετΛ͕Μ͹Ζ͏ •Τϥʔ؂ࢹΛ͕Μ͹Ζ͏ ো֐Λىͨ͜͠ਓྨͷߟ͕͑ͪͳ͜ͱ ΋ͬͱ ΋ͬͱ ΋ͬͱ ΋ͬͱ ΋ͬͱ
6. ͕Μ͹Γͨ͘ͳ͍
7. •͕Μ͹ΔͱϛεΔ •͕Μ͹Γ͸ݸਓʹґଘ •͕Μ͹ΔͱർΕΔ •͕Μ͹Δ͸Ӭԕʹ͸ܧଓͰ͖ͳ͍ ͕Μ͹Γͨ͘ͳ͍
8. ࢓૊ΈͰͳΜͱ͔͍ͨ͠
9. ɹো֐͕ଟ͍ΜͰ͢Α…😣 ɹ90% ϛε͕ͳ͍͜ͱͷอূ͸ͦͦ͜͜Ͱ͖Δ͚Ͳ 
 ɹ100% ϛε͕ͳ͍͜ͱͷอূ͸ͱͯ΋ߴίετ ɹϦϦʔεස౓Λ্͛Δͷ͕೉ͯ͘͠…😭 ɹ͙͢ʹ੾Γ໭ͤΔΑ͏ʹͨ͠ํ͕ 
 ɹ݈શ͔΋͠Ε·ͤΜͶ
10. •ϦϦʔε͸िʹ 1 ճ ˞ 
 ˞
    ো֐ରԠΛআ͘
11. •ϦϦʔε͸िʹ 1 ճ •100ʙ200 Pull Requests •500ʙ1,000 commits •10Kʙ60K lines ˞ ϏοάόϯϦϦʔε 
 ˞
    Ұ൪ݹ͘ػೳ͕ଟ͍ϞϊϦγοΫϦϙδτϦʹ͓͚Δ਺ɻଟ͘ͷଞϦϙδτϦ͸΋ͬͱԺ΍͔Ͱ͢ 
 ˞
    ো֐ରԠΛআ͘ ˞
12. ϦϦʔείετ͕ߴͯ͘ো֐͕ଟ͘ɾେ͖͘ͳΓ͕ͪ ো֐͕ଟͯ͘ϦϦʔεස౓Λ্͛ΒΕͳ͍ ϏοάόϯϦϦʔε
13. ͱ͍͏Θ͚Ͱ
14. ͭͬͨ͘ NBLJDBNFM
    
    DJSDVJU@TXJUDI 
 IUUQTHJUIVCDPNNBLJDBNFMDJSDVJU@TXJUI
15. circuit_switch
16. ɹো֐͕ଟ͍ΜͰ͢Α…😣 ɹ90% ϛε͕ͳ͍͜ͱͷอূ͸ͦͦ͜͜Ͱ͖Δ͚Ͳ 
 ɹ100% ϛε͕ͳ͍͜ͱͷอূ͸ͱͯ΋ߴίετ ɹϦϦʔεස౓Λ্͛Δͷ͕೉ͯ͘͠…😭 ɹ͙͢ʹ੾Γ໭ͤΔΑ͏ʹͨ͠ํ͕ 
 ɹ݈શ͔΋͠Ε·ͤΜͶ
17. circuit_switch ΍Γ͍ͨ͜ͱɿ ϦϦʔεස౓Λ͋͛Δ 
 ˞
    ϦϦʔεස౓΋͍͋͛ͨͰ͢
18. circuit_switch ΍Γ͍ͨ͜ͱɿ ௿ίετʹ੾Γ໭͢
19. circuit_switch
    if CircuitSwitch.open?(close_if_reach_limit: false) do_something_experimental else call_existing_codes end
    CircuitSwitch.report(if: unexpected_happen)
20. circuit_switch
    if CircuitSwitch.open?(close_if_reach_limit: false) do_something_experimental else call_existing_codes end
21. circuit_switch
    •CircuitSwitch ͕։͍͍ͯΔ࣌ do_something_experimental ΛݺͿ •CircuitSwitch ͕ด͡ΒΕͨ࣌ call_existing_codes ΛݺͿ if CircuitSwitch.open?(close_if_reach_limit: false) do_something_experimental else call_existing_codes end
22. circuit_switch •CircuitSwitch ͷ։ด৚݅ نఆ্ݶճ਺ʹ౸ୡ ։์৚݅ͱҰக ด࠯৚݅ͱҰக ৗ࣮࣌ߦʴڧ੍ด࠯
23. circuit_switch •CircuitSwitch ͷ։ด৚݅
    if CircuitSwitch.open?(reach_limit: 100) do_something_experimental else call_existing_codes end نఆ্ݶճ਺ʹ౸ୡ ։์৚݅ͱҰக ด࠯৚݅ͱҰக ৗ࣮࣌ߦʴڧ੍ด࠯
24. circuit_switch
    if CircuitSwitch.open?(if: current_user.testing?) do_something_experimental else call_existing_codes end •CircuitSwitch ͷ։ด৚݅ نఆ্ݶճ਺ʹ౸ୡ ։์৚݅ͱҰக ด࠯৚݅ͱҰக ৗ࣮࣌ߦʴڧ੍ด࠯
25. circuit_switch
    if CircuitSwitch.open?( close_if: Date.today > some_period ) do_something_experimental else call_existing_codes end •CircuitSwitch ͷ։ด৚݅ نఆ্ݶճ਺ʹ౸ୡ ։์৚݅ͱҰக ด࠯৚݅ͱҰக ৗ࣮࣌ߦʴڧ੍ด࠯
26. circuit_switch
    
    rake circuit_switch:terminate_to_run 
 [/app/services/greetings_service:21 block 
 in validate] •CircuitSwitch ͷ։ด৚݅ if CircuitSwitch.open?(close_if_reach_limit: false) do_something_experimental else call_existing_codes end نఆ্ݶճ਺ʹ౸ୡ ։์৚݅ͱҰக ด࠯৚݅ͱҰக ৗ࣮࣌ߦʴڧ੍ด࠯
27. circuit_switch
    CircuitSwitch.report(if: unexpected_happen) •CircuitSwitch ͕։͍͍ͯΔ࣌ report ΛૹΔ •Slack ΍ Bugsnag ͳͲ೚ҙͷϨϙʔτπʔϧΛࢦఆ •։ด৚݅͸ open? ͱྨࣅͷ৚݅Λࢦఆ
28. circuit_switch •ґଘϥΠϒϥϦ •ActiveRecord •࣮ߦߦʢcallerʣɾCircuitSwitch ͷ։ดঢ়ଶΛ DB ʹอଘ •ActiveJob •DB ߋ৽ɾϨϙʔτ
29. circuit_switch •ίʔυϦʔμʔͷΈͲ͜Ζ
30. circuit_switch •ίʔυϦʔμʔͷΈͲ͜Ζ •ͳ͍
31. circuit_switch •ίʔυϦʔμʔͷΈͲ͜Ζ •ͳ͍ •ͳ͍ͷ͕ΈͲ͜Ζʢʁʣ
32. ΈͲ͜Ζ •Կ΋มΘͬͨ͜ͱΛ΍͍ͬͯͳ͍ •Rails ͷίʔυ͕ॻ͚ͨΒॻ͚Δ •ࠓ͙͢ॻ͖࢝ΊΒΕΔ
33. ΈͲ͜Ζ •;ͭ͏ͷ Rails ΞϓϦ͕ґଘ͍ͯ͠ΔϥΠϒϥϦʹґଘ •ࠓ͙͢ಋೖͰ͖Δ
34. ͱ͜ΖͰ͓ؾ͖͔ͮͱࢥ͍·͕͢
35. Inspired by •Feature Toggles •CircuitBreaker 'FBUVSF
    5PHHMFT
    
    NBSUJOGPXMFSDPN 
 IUUQTNBSUJOGPXMFSDPNBSUJDMFTGFBUVSFUPHHMFTIUNM $JSDVJU#SFBLFS
    
    NBSUJOGPXMFSDPN 
 IUUQTNBSUJOGPXMFSDPNCMJLJ$JSDVJU#SFBLFSIUNM
36. Feature Toggles •৽ػೳΛಛఆϢʔβʹ҆શɾ଎΍͔ʹఏڙ͢ΔͨΊͷ࢓૊Έ •ؔ࿈ɿDark Launch •🙅 େن໛ feature ϒϥϯν্Ͱͷ։ൃ 
 🙆 master(main) ϒϥϯνʹ߹ྲྀͨ͠։ൃ 'FBUVSF
    5PHHMFT
    
    NBSUJOGPXMFSDPN 
 IUUQTNBSUJOGPXMFSDPNBSUJDMFTGFBUVSFUPHHMFTIUNM
37. Feature Toggles •ΧφϦΞϦϦʔε •ϥϯμϜબग़ͷۃҰ෦ͷҰൠϢʔβʹػೳ։์༷ͯ͠ࢠݟ •A / B ςετ 'FBUVSF
    5PHHMFT
    
    NBSUJOGPXMFSDPN 
 IUUQTNBSUJOGPXMFSDPNBSUJDMFTGFBUVSFUPHHMFTIUNM
38. CircuitBreaker •αʔόʹಛఆճ਺Ҏ্ͷো֐͕ൃੜͨ࣌͠ʹ 
 ϦΫΤετΛड͚෇͚ͣʹΤϥʔΛฦ͢࢓૊Έ •ো֐ͷ࿈࠯తͳൃੜΛ๷͙ •αʔό͕վળͨ͠ΒࣗಈͰ෮ؼ͢Δ $JSDVJU#SFBLFS
    
    NBSUJOGPXMFSDPN 
 IUUQTNBSUJOGPXMFSDPNCMJLJ$JSDVJU#SFBLFSIUNM
39. Inspired by … ?
40. Inspired by … ? •ΠϯεύΠΞ͞Εͨͱ͍͏ʹ͸࢓૊Έ͕͠ΐ΅͍ •τάϧͷ؅ཧʹ೉͕͋Δ •ϒϨʔΧʔΛམͱ͢৚͕݅ͨͩͷճ਺ •ࣗಈ෮ؼ͠ͳ͍ •DB ΞΫηεΛ͢ΔͷͰΦʔόʔϔου͕ੜ͡Δ
41. ɹো֐͕ଟ͍ΜͰ͢Α…😣 ɹ90% ϛε͕ͳ͍͜ͱͷอূ͸ͦͦ͜͜Ͱ͖Δ͚Ͳ 
 ɹ100% ϛε͕ͳ͍͜ͱͷอূ͸ͱͯ΋ߴίετ ɹϦϦʔεස౓Λ্͛Δͷ͕೉ͯ͘͠…😭 ɹ͙͢ʹ੾Γ໭ͤΔΑ͏ʹͨ͠ํ͕ 
 ɹ݈શ͔΋͠Ε·ͤΜͶ
42. Ұ఺ूத •΄͍͠ͷ͸ʮ௿ίετʹ੾Γ໭ͤΔʯ࢓૊Έ •ͱʹ͔͘ࠓ΄͍͠ ػೳ͚ͩΛ࣮૷ͯ͠ϦϦʔε
43. ॠൃྗ •ͱΓ͋͑ͣ΄͔ͬͨ͠ •ϨϏϡʔɾௐࠪɾςετίετ͕૿େ͍ͯ͠Δঢ়گΛվળ͍ͨ͠ •ݱ৔ͷࠓ͋Δ՝୊Λࠓ͙͢ղܾ͍ͨ͠ •଍Γͳ͍஌ࣝɾٕज़͸ͨ͘͞Μ͋Δ •४උ͕Ͱ͖Δ·Ͱ଴ͭͱ͋ͬͱ͍͏ؒʹ݄೔͕ա͗Δ
44. ॠൃྗ •MVP •Minimum Viable Product •࣮༻࠷খݶͷ੡඼ •ఏڙ͠ͳ͕Β։ൃ͢Δ
45. ΍Βͳ͍ཧ༝ •ͦ͏͔΋͠Εͳ͍ •ͦ͏Ͱͳ͍͔΋͠Εͳ͍ •OSS ʹ͓͚ͯ͠͹୭͔ͷ໾ʹཱ͔ͭ΋͠Εͳ͍ •OSS ʹ͠ͳ͍ཧ༝͸ͳ͍ ɹgem ʹ͠ͳͯ͘΋͍͍Μ͡Όͳ͍ʁ
46. ՝୊ʹΞϓϩʔν͢Δ •ίʔυͷ೉͠͞ͱϥΠϒϥϦͷՁ஋͸ؔ܎ͳ͍ ɹ͜Μͳ͠ΐ΅͍ίʔυΛੈʹग़͢ͳΜͯ…
47. ·ͣ͸͍ͪ࢝͘͞ΊΔ
48. ͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠