DDD実践(ベスト)プラクティス ~ドメインイベントとマイクロサービスと組織の関係~

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1. DDD࣮ફ(ϕετ)ϓϥΫςΟε ʨυϝΠϯΠϕϯτͱ ϚΠΫϩαʔϏεͱ ૊৫ͷؔ܎ʩ Ճ౻५Ұ ͔ͱ͡ΎΜ
   $IBU8PSL
   
2. DDD࣮ફϕετϓϥΫςΟε 2016/3/26 © ChatWork All rights reserved. ࣗݾ঺հ w!KJLP
   w$IBU8PSLͰςοΫϦʔυΛ΍͍ͬͯ·͢ɻ
   wաڈ͸4FBTBS+BWBɺࠓ͸4DBMB"LLB͕ओઓ৔ɻ
   w࠷ۙ͸
   $234 &4
   "LLBͳͲΛ࢖ͬͯ࢓ࣄΛͯ͠ ͍·͢ɻ
   w%%%Ͱ໎ࢠʹͳͬͯͨΒ੠͔͚͍ͯͩ͘͞ɻΞυ όΠε͠·͢ɻ
3. DDD࣮ફϕετϓϥΫςΟε 2016/10/24 © ChatWork All rights reserved. ΞδΣϯμ wλΠτϧઌߦͰߟ͑ͨˠॻ͍͍ͯΔ͏ͪʹϕ ετͳϓϥΫςΟε͡Όͳͯ͘΋͍͍ͱͳͬ ͨͷͰɺϕετ͔Ͳ͏͔͸͓͖ͯ͞ͱ͍͏લ ఏͰʜɻ
   w $234ͱ͸
   w $234
   
   &WFOU
   4PVSDJOHͱ͸
   w υϝΠϯΠϕϯτͱϚΠΫϩαʔϏε
   w ϚΠΫϩαʔϏεͱίϯ΢ΣΠͷ๏ଇ
   w ίϯ΢ΣΠͷ๏ଇͱ%%%ͷؔ܎ੑ
   
4. DDD࣮ફϕετϓϥΫςΟε 2016/10/24 © ChatWork All rights reserved. 4 ։ൃऀͷํ͕ଟ͍ͱࢥ͏ͷͰ
   ઓज़ͷ࿩͔Β
5. DDD࣮ફϕετϓϥΫςΟε 2016/10/24 © ChatWork All rights reserved. 5 υϝΠϯΠϕϯτͷલʹ$234͔Β
6. DDD࣮ફϕετϓϥΫςΟε 2016/10/24 © ChatWork All rights reserved. 6 $234ͱ͸ w $PNNBOE
   BOE
   2VFSZ
   3FTQPOTJCJMJUZ
   4FHSFHBUJPO
   wίϚϯυɾΫΤϦ੹຿෼཭
   w ೥
   (SFH
   :PVOHࢯ͕ߟҊͨ͠ύλʔϯɻ
   w ೥ʹ#FSUSBOE
   .FZFSࢯ͕ߟҊͨ͠ίϚϯυΫΤϦ෼ ཭ݪଇ $PNNBOE2VFSZ
   4FQBSBUJPO$24 ΛΞʔΩς Ϋνϟʹద༻ͨ͠΋ͷ͕$234ɻ
   w ʮ͋ΒΏΔϝιου͸ɺΞΫγϣϯΛ࣮ߦ͢ΔίϚϯ υ͔ɺݺͼग़͠ݩʹσʔλΛฦ͢ΫΤϦ͔ͷ͍ͣΕ͔ Ͱ͋ͬͯɺ྆ํΛߦͬͯ͸ͳΒͳ͍ɻ͜Ε͸ɺ࣭໰Λ ͢Δ͜ͱͰճ౴ΛมԽͤͯ͞͸ͳΒͳ͍ͱ͍͏͜ͱ ͩɻʯ
7. DDD࣮ફϕετϓϥΫςΟε 2016/10/24 © ChatWork All rights reserved. 7 ετϨʔδΛ෼͚ͳ͍$234
   ΞʔΩςΫνϟ w $24ʹج͍ͮͨ࠷΋୯७ͳߏ੒͸ɺυϝΠϯ૚ΛϥΠτͱϦʔυͷܥ Λ෼͚Δɻ Client Write Stack Read Stack Database Domain Layer Application Layer Infrastructure Layer Domain Layer Application Layer Infrastructure Layer
8. DDD࣮ફϕετϓϥΫςΟε 2016/10/24 © ChatWork All rights reserved. 8 ετϨʔδ΋෼͚Δ$234
   ΞʔΩςΫνϟ w ϥΠτͱϦʔυܥΛ෼ੳ͍ͯ͘͠ͱɺϦʔυଆ͸ΫΤϦཁ݅ʹରԠ͢ Δͷ͕໨తͳͷͰυϝΠϯϞσϧ͕ෆཁʹͳΔɻ Client Write Stack Read Stack Database Domain Layer Application Layer DAO + DTO Read Records Infrastructure Layer Write Records ReadModel ܗࣜม׵Λߦ͏
9. DDD࣮ફϕετϓϥΫςΟε 2016/10/24 © ChatWork All rights reserved. 9 ͦͯ͠υϝΠϯΠϕϯτ΁
10. DDD࣮ફϕετϓϥΫςΟε 2016/10/24 © ChatWork All rights reserved. 10 υϝΠϯΠϕϯτ͕ओ໾ʹͳΔ&WFOU
    4PVSDJOH w (SFH
    :PVOHࢯߟҊ
    w &WFOU
    4PVSDJOH ҎԼ
    &4 ͱ͸ɺσʔλͰ͸ͳ͘Կ͔͠Βͷग़དྷࣄʹυϝ ΠϯΠϕϯτΛϞσϦϯάͷओ໾ͱ͢Δ͜ͱɻ
    w υϝΠϯϞσϧΛσʔλͱͯ֨͠ೲ͢ΔͷͰ͸ͳ͘ɺൃੜ͢ΔυϝΠϯΠ ϕϯτΛ͢΂ͯӬଓԽ͢Δɻ جຊతʹ௥Ճ͔͠͠ͳ͍
    w &4͸$234Λܶతʹվྑ͢Δ ҎԼ
    $234 &4 ɻ CartItemAdded { id, cartId, itemId, itemCount } CartItemCountUpdated { id, cartId, itemId, itemCount } CartCreated { id, cartId, userId } CartItemRemoved { id, cartId, itemId } …
11. DDD࣮ફϕετϓϥΫςΟε 2016/10/24 © ChatWork All rights reserved. 11 $234 &4ΞʔΩςΫνϟ  w γεςϜ͸ू໿Ͱൃੜͨ͠υϝΠϯΠϕϯτͰۦಈ͠Πϕϯτ͸δϟʔφϧ ͱͯ͠ӬଓԽ͞ΕΔɻΠϕϯτ͔ΒͷϦϓϨΠ͸4OBQTIPU+PVSOBMɻ Client Write Stack Read Stack Data Store DAO + DTO Read Records Aggregate Application Layer Infrastructure Layer Event Store Journals Snapshots Πϕϯτͷอଘઌ CartCreated CartItemAdded … ͢΂ͯͷΠϕϯτΛ ӬଓԽ Snapshot+journalsͰ ϦϓϨΠ
12. DDD࣮ફϕετϓϥΫςΟε 2016/10/24 © ChatWork All rights reserved. 12 $234 &4ΞʔΩςΫνϟ  w ίϚϯυʹΑͬͯੜͨ͡ू໿ͷঢ়ଶมԽΛΠϕϯτͱ͠ ͯ௨஌͢Δɻ Domain Layer Aggregate Aggregate Aggregate Command Command Event Command/Event Handler Event Event Event Command Command/Event Handler Command/Event Handler Event Event Event
13. DDD࣮ફϕετϓϥΫςΟε 2016/10/24 © ChatWork All rights reserved. 13 υϝΠϯΠϕϯτͱϚΠΫϩαʔϏε w #$ؒͷ࿈ܞʹ΋υϝΠϯΠϕϯτ͕ར༻ՄೳʹͳΔɻϚΠΫϩαʔϏεΞʔΩ ςΫνϟͱ૬ੑ͕Α͍ɻ
    w z֎෦ͷଞͷڥք͚ͮΒΕͨίϯςΩετʹ͸໌ࣔతͳΠϯλʔϑΣΠε͕͋ ΓɺͦͷΠϯλʔϑΣΠε͕ଞͷίϯςΩετͱڞ༗͢ΔϞσϧΛܾఆ͠· ͢ɻz ϚΠΫϩαʔϏεΞʔΩςΫνϟΑΓ
    w Πϕϯτʹ͸#$಺෦͚ͩͰൃੜɾফඅ͞ΕΔӅΕΠϕϯτͱ֎෦ͷ#$͕ؔ৺ Λ࣋ͭڞ༗Πϕϯτ͕ଘࡏ͢Δɻ BC (2) Application Domain Layer Aggregate BC (1) Application Domain Layer Aggregate BC (3) Application Domain Layer Aggregate Event Event Event
14. DDD࣮ફϕετϓϥΫςΟε 2016/10/24 © ChatWork All rights reserved. 14 ͔͜͜Β͍͖ͳΓઓུͷ࿩ʹͳΓ·͢
15. DDD࣮ફϕετϓϥΫςΟε ग़ՙ؅ཧνʔϜ ࡏݿ؅ཧνʔϜ 2016/10/24 © ChatWork All rights reserved. 15 ϚΠΫϩαʔϏεͱίϯ΢ΣΠͷ๏ଇ  w lγεςϜΛઃܭ͢Δ͋ΒΏΔ૊৫͸ɺඞͣͦͷ ૊৫ͷίϛϡχέʔγϣϯߏ଄ʹ฿ͬͨߏ଄Λ ࣋ͭઃܭΛੜΈग़͢ɻz
    Š
    
    .FMWJO
    $POXBZ ϝ ϧϰΟϯɾίϯ΢ΣΠ
    w "NB[PO
    w νʔϜʹαʔϏε
    w ։ൃɾӡ༻ͳͲͷϥΠϑαΠΫϧͷҰ੾ͷ ੹೚Λ࣋ͭ
    w ຕͷϐβνʔϜ
    w ຕͷϐβͰ଍Γͳ͍΄ͲͷνʔϜ͸࡞Β ͳ͍
    w /FUqJYͰ΋࠷ॳ͔Βখن໛ͳνʔϜͰߏ੒͠ɺ ΞʔΩςΫνϟͷͨΊʹ૊৫ߏ଄Λઃܭͨ͠ɻ ࡏݿ؅ཧγεςϜ ग़ՙ؅ཧγεςϜ ൢച؅ཧνʔϜ ൢച؅ཧγεςϜ ࢓ೖ؅ཧνʔϜ ࢓ೖ؅ཧγεςϜ
16. DDD࣮ફϕετϓϥΫςΟε 2016/10/24 © ChatWork All rights reserved. 16 ϚΠΫϩαʔϏεͱίϯ΢ΣΠͷ๏ଇ  w ୯ҰγεςϜ୯ҰνʔϜ
    w γεςϜ಺ͷดཻͨ͡౓ͷࡉ͔͍ίϛϡχ έʔγϣϯಛੑΛ͍࣋ͬͯΔɻαʔϏε಺ͷ มߋ΍ϦϑΝΫλϦϯά͸ޮ཰తɻ
    w ୯ҰγεςϜෳ਺νʔϜ
    w ཻ౓ͷࡉ͔͍ดͨ͡ωοτϫʔΫ͸ہॴԽ͞ ΕΔՄೳੑ͕͋Δ ஍ཧతڥք͕͋Δ৔߹ಛʹ ɻ νʔϜؒΛލ͕Δ৔߹͸ͦͷಛੑΛܽ͘৔߹ ͕͋Δɻมߋ΍ϦϑΝΫλϦϯάͷίετ΋ ૬ରతʹߴ͘ͳΔɻେن໛γεςϜͷอक͕ ೉͘͠ͳΔݪҼ
    w ڞ༗αʔϏεʹ޲͔͏ཧ༝
    w γεςϜͷ෼ׂʹߴ͍ίετΛ෷͏έʔεɻ
    w ෳ਺ͷαʔϏεʹލ͕Δมߋ͕σϦόϦʔί ετΛ͋͛ͯ͠·͏έʔεɻ νʔϜ γεςϜ νʔϜ νʔϜ γεςϜ φϩʔόϯυ ϒϩʔυόϯυ
17. DDD࣮ફϕετϓϥΫςΟε 2016/10/24 © ChatWork All rights reserved. 17 ίϯ΢ΣΠͷ๏ଇͱ%%%ͷؔ܎ੑ w ϚΠΫϩαʔϏεͱ͸ɺٕज़υϝΠϯͰ͸ͳ͘ɺϏδωευϝ Πϯʹ฿ͬͯϞσϧԽ͞ΕͨαʔϏεɻ
    w ϞσϦϯά࡞ۀʹݴޠೳྗΛ׆༻͢Δ͜ͱͷҙຯ
    w ਤΛඳ͘ʹ͸ࢹ֮తɾۭؒతͳࢥߟΛۦ࢖͢Δɻ෼ੳ͢Δࡍ ʹίʔυͷײ֮Λ࢖͏ͷͱಉ༷ɻݴޠΛ࢖͏͜ͱ͸ͦΕΒͱ มΘΒͳ͍ɻ
    w ໾ʹཱͭϞσϧͱઃܭΛݟ͚ͭΔʹ͸͜ͷͭ͢΂͕ͯඞཁ ʹͳΔ͕ݴޠʹΑΔ࣮ݧ͸ݟա͝͞ΕΔ͜ͱ͕࠷΋ଟ͍ɻ
    w ڥք͚ͮΒΕͨίϯςΩετʹϞσϧͷೄுΓ
    w ͭͷνʔϜʹͭͷݴޠɻͭͷڥքʹෳ਺ͷϞσϧ͕ଘࡏ ͢Δ৔߹͕͋Δ͕ɺผʑͷϞσϧ͕ࠞࡏ͢ΔͱόάͷԹচ΍ ৴པੑͷ௿Լ΍ཧղ͕ͨ͘͠ͳΔɻνʔϜͷίϛϡχέʔ γϣϯ΋ࠞཚΛདྷ͢ɻ
    w Ϟσϧ͕ద༻͞ΕΔڥքΛ໌ࣔతʹఆٛ͢Δ͜ͱɻͦΕ͸ɺ νʔϜฤ੒ɺΞϓϦέʔγϣϯಛ༗ͷ༻్ɺίʔυϕʔε΍ εΩʔϚͳͲͷ෺ཧతͳදݱ͔Βઃఆ͢Δɻͦͷڥք಺Ͱ ͸ɺϞσϧΛݫີʹҰ؏ੑͷ͋Δ΋ͷʹอͭ͜ͱɻ ਤ ίʔυ ݴޠ ίϯςΩετ Ϟσϧ ίϯςΩετ Ϟσϧ νʔϜ νʔϜ
18. DDD࣮ફϕετϓϥΫςΟε 2016/10/24 © ChatWork All rights reserved. 18 ·ͱΊ w $234
    w ઃܭ͕γϯϓϧʹͳΔɻϦʔυܥͷϢʔεέʔεΛ૝ఆ ͨ͠υϝΠϯϞσϦϯά͔Βղ์͞ΕΔɻ
    w $234 &4
    w $234Λ͞Βʹվྑ͢ΔɻυϝΠϯϞσϧ͸σʔλͱ͍ ͏ΑΓग़དྷࣄΠϕϯτͷू߹Ͱ͋Δͱ͍͏ࢹ఺͕ಘΒ ΕΔɻ͢΂͕ͯΠϕϯτͰۦಈ͢Δੈքɻ
    w ͱ͸͍͑ɺΞʔΩςΫνϟ͸૊৫ͱͷؔ܎ੑΛແࢹͰ͖ ͳ͍
    w ΞʔΩςΫνϟͷ෼཭ɾ౷߹ઓུ͸ɺ૊৫΍ίϛϡχ έʔγϣϯʹӨڹΛ૬ޓʹ༩͑߹͏ɻ
19. DDD࣮ફϕετϓϥΫςΟε 2016/10/24 © ChatWork All rights reserved. 19 ͓͠·͍