DDD + Clean Architecture + UCDOM Full版

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DDD + Clean Architecture ʴϢʔεέʔεۦಈ։ൃͷྑ͍ͱ͜ΖΛऔΓೖΕΑ͏ Full൛ 2016/03/16 @yoskhdia DDD+CQRS+EventSourcing࣮૷͢Δձ ϋογϡλάɿ#ddd_cqrs_es_tokyo

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About me • ԞాՂڗʢYoshitaka Okudaʣ • גࣜձࣾSocketʢKDDI Syn.ϗʔϧσΟϯάεάϧʔϓʣ  ΞʔΩςΫτ • Twitter @yoskhdia • interested in DDD/Scala/C#/Reactive System/  Architect/System Thinking/Team Building/  Agile/ܦӦ৘ใֶ/On-Road Bike

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Agenda • υϝΠϯۦಈઃܭʢDDDʣ͓͞Β͍ • Clean Architectureͱ͸Կ͔ • DDD + Clean Architectureମݧஊ • Ϣʔεέʔεۦಈ։ൃʢICONIXϓϩηεʣʹ ग़ձͬͨ࿩

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ཹҙࣄ߲ • ͜ͷൃද͸ࢲݸਓͷݟղʹدΔ΋ͷͰ͢ɻ • ॻ੶ʮυϝΠϯۦಈઃܭʯ΋ਖ਼ࣜʹ͸ʮΤϦοΫɾΤϰΝϯ εͷʯͱ෇͘Α͏ʹɺDDD͸ϕετϓϥΫςΟεΛ·ͱΊͨ ஌ࣝମܥͰ͋Γɺઈରͷਖ਼ղͷ͋Δ΋ͷͰ͸͋Γ·ͤΜɻ • ࠾༻͢ΔϓϩμΫτͷੑ֨ʹΑͬͯɺ۩ମతͳํ๏͸มΘΓ ·͢ɻʢࠓճ͸UIΛ࣋ͨͳ͍APIͰߟ͍͑ͯ·͢ɻʣ • ͦͷͨΊɺ͜͏͍͏෩ʹద༻͍ͯ͠Δਓ΋͍ΔΜͩͳɺͱ͍ ͏Թ͔͍৺Ͱ͓ئ͍͍ͨ͠·͢...

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υϝΠϯۦಈઃܭʢDDDʣ ͓͞Β͍ ίΞυϝΠϯ ϢϏΩλεݴޠ ϞσϧΛ୳ٻ

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ͬ͘͟ΓDDD • DDD͸ݴ༿Λେ੾ʹ͢Δ։ൃख๏ • ΤΫετϦʔϜϓϩάϥϛϯάʢXPʣΛϕʔεʹϞσϧۦಈઃܭΞϓ ϩʔνΛద༻͍ͯ͠Δ • ϏδωεมԽʹͲ͏ରԠ͍͔͕ͯ͘͠ςʔϚ • ͦͷͨΊʹదԠܕͷϓϩηεͱϞσϧۦಈઃܭΛ࢖͏ • ʢݸਓతʹࢥ͏ͷ͸ʣνʔϜͷڌΓॴͱͳΓಘΔ • ໎ͬͨΒಡΉ • νʔϜͷڞ௨ཧղͷݩʹͳΔˠΦϨ༷։ൃख๏͔Βͷ୤٫

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ݴ༿ͷఆٛʢݪଇʣ • υϝΠϯʢDomainʣ • Ϗδωεશମͷ໰୊ྖҬͦͷ΋ͷͷ͜ͱɻιϑτ΢ΣΞͰղܾ͢Δͷ͸ɺ͜ͷҰ෦ɻ • υϝΠϯϞσϧʢDomain Modelʣ • υϝΠϯʹରͯ͠ɺͦͷղܾࡦʢιϦϡʔγϣϯʣΛϞσϧԽͨ͠΋ͷɻ • υϝΠϯΤΩεύʔτʢDomain Expertʣ • υϝΠϯʹਫ਼௨͍ͯ͠ΔਓɻҰਓͰ͋Δ͜ͱ΋͋Ε͹ෳ਺ਓͰ͋Δ͜ͱ΋͋Δɻ • ίΞυϝΠϯʢCore Domainʣ • υϝΠϯ͸͍͔ͭ͘ͷྖҬʹ෼ׂ͢Δ͜ͱ͕ଟ͍ɻ͜ͷ࣌ɺҰ൪ϏδωεՁ஋ͷߴ͍ྖ ҬΛίΞυϝΠϯͱ͍͏ɻ࣌ؒ΍ਓ͸༗ݶͳͷͰίΞυϝΠϯΛݟ͚ͭͯɺͦ͜ʹ஫ྗ ͢Δ͜ͱ͕ॏཁɻ

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ݴ༿ͷఆٛʢݪଇʣ • ϢϏΩλεݴޠʢUbiquitous Languageʣ • ίʔυΛॻ͍͍ͯΔͱΦϨΦϨ໋໊Λ͕ͪ͠ɻ͢ΔͱɺυϝΠϯΤΩεύʔτ ͱ࿩Λ͢Δͱ͖ʹݴ༿ͷ຋༁͕ൃੜ͢Δɻ͜͏ͳΔͱɺυϝΠϯΤΩεύʔτ ͷඳ͘Ϟσϧͱίʔυ͕ဃ཭͍ͯͬͯ͠͠·͏ͷͰɺυϝΠϯΤΩεύʔτΛ ؚΉνʔϜશମͰಉ͡ݴ༿Λ࢖͏Α͏ʹ߹ҙ͢Δɻ • ڥք͚ͮΒΕͨίϯςΩετʢBounded Contextʣ • จ຺ʢίϯςΩετʣʹΑͬͯɺಉ͡ݴ༿ͳͷʹҟͳΔҙຯʹͳΔ͜ͱ͕͋Δɻ υϝΠϯϞσϧ͸େ͖͘ͳΓ͕ͪͳͷͰɺҰ؏ੑΛอͬͨ··εέʔϧ͢Δʹ ͸ɺίϯςΩετͷڥքΛϋοΩϦͤͯ͞ҙຯͷมΘΒͳ͍৔ॴΛ࡞Δɻίϯ ςΩετϚοϓͱ͍͏πʔϧΛ࢖ͬͨΓ͢Δɻ  InfoQʮίϯςΩετϚοϐϯάʹΑΔઓུతυϝΠϯۦಈઃܭʯΛࢀর

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υϝΠϯͱίϯςΩετͷؔ܎ υϝΠϯ ίϯςΩετ αϒυϝΠϯ ίΞυϝΠϯ • ఺ઢɿ  υϝΠϯڥք • ੺࣮ઢɿ  ίϯςΩετڥք • ίϯςΩετ͸͍ ͔ͭ͘ͷυϝΠϯ ڥքʹލΔ͜ͱ͕ ͋Δ • ཧ૝͸αϒυϝΠ ϯͱίϯςΩετ ͕1ର1 αϒυϝΠϯ

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ݴ༿ͷఆٛʢ࣮ફʣ • ΤϯςΟςΟʢEntityʣ • ʢޡղΛڪΕͣʹݴ͑͹ʣҰൠʹ૝૾͢ΔϞσϧͷجຊ୯ҐɻϥΠϑαΠΫϧ ͕͋Δɻ • ू໿ʢAggregateʣ • ͍͔ͭ͘ͷΤϯςΟςΟؒͰ੔߹ੑΛอͨͳ͚Ε͹Ϟσϧͱͯ͠੒ཱ͠ͳ͍৔ ߹ʢྫ͑͹ɺ஫จͱ஫จ໌ࡉʣ͕͋Δɻ͜ΕΒͷΤϯςΟςΟΛଋͶͨͱ͖ɺ ͦͷϧʔτʹҐஔ͢ΔΤϯςΟςΟΛू໿ͱݺͿɻ • ஋ΦϒδΣΫτʢValue Objectʣ • ϥΠϑαΠΫϧ͸ແ͘ෆมͷΦϒδΣΫτɻϢϏΩλεݴޠͰఆٛ͞Εͨݴ༿ ͱৼΔ෣͍Λ࣋ͭ͜ͱͰυϝΠϯϞσϧ͕๛͔ʹͳΔɻ

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ݴ༿ͷఆٛʢ࣮ફʣ • υϝΠϯαʔϏεʢDomain Serviceʣ • ෳ਺ͷΤϯςΟςΟʹ·͕ͨΔৼΔ෣͍ͳͲɺΤϯςΟςΟ͕࣋ͭʹ͸ద͞ ͳ͍ৼΔ෣͍Λఆٛͨ͠υϝΠϯΦϒδΣΫτɻঢ়ଶΛ࣋ͬͯ͸͍͚ͳ͍ɻ • ϑΝΫτϦʢFactoryʣ • ෳࡶͳΦϒδΣΫτ΍AggregateΛੜ੒͢ΔͨΊͷ࣮૷ύλʔϯɻΤϯςΟ ςΟͷϥΠϑαΠΫϧͷى఺ʹͳΔɻ • ϦϙδτϦʢRepositoryʣ • ΤϯςΟςΟͷϥΠϑαΠΫϧʹ్͓͍ͯதʢঢ়ଶͷ෮ݩʣͱ࠷ޙʢ࡟আʣ Λ୲͏࣮૷ύλʔϯɻAggregateʹରͯ͠ͷΈ༻ҙ͢Δɻ

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ଓ͖͸ࢀߟࢿྉͰ

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DDDΛ΍Δҙٛ • υϝΠϯϞσϧ͕ચ࿅͞Ε͍ͯ͘͜ͱͰɺ • ʮۀ຿஌ࣝʯ-ʮݴ༿ʯ-ʮίʔυʯ͕࿈ಈ • ֎͔ΒͷมԽʹదԠ͠΍͘͢ • ։ൃΛਐΊΔ͜ͱʹΑͬͯൃݟ͞ΕΔ৽ͨͳ ஌ݟΛϏδωε΁ؐݩ

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–Jim HighsmithࢯʮWhat is Agility?ʯ “ΞδϟΠϧ͞ͱ͸ɺܹม͢ΔϏδωε؀ ڥʹ͓͍ͯརӹΛੜΈग़ͨ͢ΊʹɺมԽ ʹରԠ͢Δͱಉ࣌ʹɺมԽΛ࡞Γग़͢ೳ ྗͰ͋Δɻ”

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ͦΕΛ࣮ફ͢ΔͨΊͷDDD υϝΠϯϞσϦϯάΛ௨ͯ͡ ։ൃऀ͕Ϗδωεʹد༩͢Δ

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Clean Architectureͱ͸Կ͔ γεςϜʹߏ଄Λ༩͑ ґଘؔ܎نଇΛఆٛ͢Δ

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ଞͷΞʔΩςΫνϟ -BZFSFE"SDIJUFDUVSF ૚Ͱ෼཭ Πϯϑϥʹґଘ )FYBHPOBM"SDIJUFDUVSF ΠϯϑϥΛ֎෦Խ "EBQUFSͰܨ͙ 0OJPO"SDIJUFDUVSF "QQMJDBUJPO Λ૚Խ

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ଞͷΞʔΩςΫνϟ • ϨΠϠʔυΞʔΩςΫνϟ • UI૚ˠΞϓϦέʔγϣϯ૚ˠυϝΠ ϯ૚ • Πϯϑϥ૚͸શͯʹґଘ͞ΕΔ • DDDຊͰ΋ݴٴ • IDDDຊͰ͸ΠϯϑϥΛ࠷্Ґʹ൓స  ˠΠϯϑϥͷ֎෦ԽΛਐΊΔͱɺ࣍ ߲Ҏ߱ͷΞʔΩςΫνϟʹͭͳ͕Δ

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ଞͷΞʔΩςΫνϟ • ϔΩαΰφϧΞʔΩςΫνϟ • Ports & AdaptersΞʔΩςΫνϟ ͱ΋ݴ͏ • த৺ʹApplicationΛஔ͖ɺΠϯϑ ϥʢUIɺDBɺetcʣΛ֎ଆʹஔ ͘ɻ྆ऀʹ͸Portͱݺ͹ΕΔޱ͕ ͋ΓɺAdapterʹΑͬͯ઀ଓ͞Ε Δɻ • IDDDຊͰ΋ݴٴ

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ଞͷΞʔΩςΫνϟ • ΦχΦϯΞʔΩςΫνϟ • ϔΩαΰφϧͱಉ͡ͰΠϯϑϥ Λ֎෦Խ͍ͯ͠Δ • ϔΩαΰφϧͱͷҧ͍ • ApplicationΛ૚Խ • ૚ͷґଘํ޲͸಺ଆ΁޲͔͏ • ७ਮʹϨΠϠʔυͷΠϯϑϥ ૚Λ֎ʹ͖࣋ͬͯͨײ͡

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͍ͣΕ΋ ιϑτ΢ΣΞΛ෼ׂ͠ ߏ଄Λ໌֬ʹ͢Δ ͭ·Γɺؔ৺ࣄͷ෼཭

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Clean Architecture ΋ͦͷҰ೿

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CMPHUIMJHIUDPNVODMFCPCUIF DMFBOBSDIJUFDUVSFIUNM

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Clean Architecture֓ཁ • ԁঢ়ͷ૚͸ɺιϑτ΢ΣΞͷҟͳΔྖҬΛද͢ • த৺ʹ͍͘΄ͲɺϏδωεՁ஋ͷߴ͍΋ͷΛஔ͘ • ֎ଆͷԁ͸ϝΧχζϜɻ಺ଆͷԁ͸ϙϦγʔɻ • ґଘؔ܎نଇ͕؊ • ૚͸ࣗ෼ΑΓ಺ଆͷ૚͚ͩʹґଘ͢Δ͜ͱ  ˠ ֎ଆͷ૚ʹ͍ͭͯ͸શ͘Կ΋஌Βͳͯ͘ྑ͍ • σʔλܗࣜ΋ಉ༷ʹ֎ଆͷ૚ͷϑΥʔϚοτΛ಺ଆʹ࣋ͪࠐ·ͳ͍ʢྫ͑͹ɺ JSONΛ࣋ͪࠐ·ͳ͍ɺDBͷRowΦϒδΣΫτΛ࣋ͪࠐ·ͳ͍ʣ • ಺ଆͷಠཱੑʢந৅౓ʣΛߴΊͯɺ֎ଆͷަ׵Λ༰қʹ͢Δ

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Hexagonal΍Onionͱૂ͍͸ಉ͡ • ϑϨʔϜϫʔΫ͔Βಠཱ͢Δ  ㅟ ㅟ ㅟ ㅟ ΞʔΩςΫνϟ͸ϥΠϒϥϦͷଘࡏʹґଘ͠ͳ͍ɻϑϨʔϜϫʔΫͱ͍͏੍໿ʹγεςϜΛ ٧ΊࠐΉͷͰ͸ͳ͘ɺγεςϜʹϑϨʔϜϫʔΫΛ౰ͯ͸ΊΔɻ • UI͔Βಠཱ͢Δ  ㅟ ㅟ ㅟ ㅟ UI͸ɺγεςϜͷ࢒Γͷ෦෼Λมߋ͢Δ͜ͱͳ͘ɺ༰қʹมߋ͢Δ͜ͱ͕Ͱ͖Δɻྫ͑͹ Web UI͔ΒίϯιʔϧUI΁ͱஔ͖׵͑Δ͜ͱ͕Ͱ͖Δɻ • σʔλϕʔε͔Βಠཱ͢Δ  ㅟ ㅟ ㅟ ㅟ Oracle·ͨ͸SQL ServerɺMongo΍BigTableͱ͍ͬͨNoSQLؚΊɺަ׵Λ༰қʹ͢Δɻ Ϗδωεϧʔϧ͸ɺσʔλϕʔεʹؚΊͳ͍ɻ • ೚ҙͷ֎෦ϦιʔεɺαʔϏε͔Βಠཱ͢Δ  ㅟ ㅟ ㅟ ㅟ Ϗδωεϧʔϧ͸ɺ୯७ʹ֎ͷੈքʹ͍ͭͯ͸Կ΋஌Δඞཁ͸ͳ͘ɺ΍Γ͍ͨ͜ͱ͚ͩʹ ूத͢Ε͹ྑ͍ɻ

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Clean Architectureͷར఺͸ʁ • ϔΩαΰφϧʴΦχΦϯɺͦΕͧΕͷ͍͍ͱ͜औΓ͕Clean Architecture • ΞϓϦέʔγϣϯʹ૚Λ༩͑ΠϯϑϥͱΞμϓλͰܨ͙ • ґଘؔ܎نଇ͕໌ࣔ͞Ε͍ͯΔ͜ͱ • ୯७ʹਤΛݟͯ෼͔Γ΍͍͢ • Adapter૚͕઀ଓΛ୲ͬͯɺ֎ͱܨ͕ΕΔͷ͸UseCaseʹݶఆ • ૚ͷڥքҧ൓͸DIPͰ๷ࢭ • ໨ࢦͯ͠Δ΋ͷ͸ͲΕ΋ಉ͡ͳͷͰɺνʔϜͰཧղΛಘΒΕ΍͍͢΋ͷΛ ࢖͑͹OK

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The Clean Architecture ͷఆٛ

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%PNBJO૚ اۀશମͷϏδωεϧʔϧ ΛΧϓηϧԽ 6TF$BTF૚ ΞϓϦέʔγϣϯͷ ϏδωεϧʔϧΛΧϓηϧԽ "EBQUFS૚ ಺ͱ֎ͷσʔλͷม׵͕ओ 'SBNFXPSL%SJWFS૚ ۩ମతͳπʔϧ

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Entities(=Domain) • ϨΠϠʔυΞʔΩςΫνϟͰ͍͏υϝΠϯ૚ • اۀશମͷϏδωεϧʔϧΛΧϓηϧԽ • ϝιουΛ࣋ͭΦϒδΣΫτɺ͋Δ͍͸ɺσʔλߏ଄ͱػೳͷηοτ • DDDຊʹ༷ʑͳύλʔϯऩ࿥ • اۀ಺ͷ༷ʑͳΞϓϦέʔγϣϯʹΑͬͯ௕͘࢖ΘΕΔ • ಛఆͷΞϓϦέʔγϣϯͷӡ༻ͷมߋʢྫ͑͹ɺϖʔδφϏήʔγϣϯ΍η ΩϡϦςΟʣͷӨڹΛΤϯςΟςΟʹ༩͑Δ΂͖Ͱ͸ͳ͍ • اۀΛލ͕ͳ͍୯ҰͷΞϓϦέʔγϣϯΛॻ͍͍ͯΔ৔߹ͩͱɺΤϯςΟ ςΟ͸ΞϓϦέʔγϣϯͱີ઀ʹ݁͹Ε͕ͪɻ

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Use Cases • ϨΠϠʔυΞʔΩςΫνϟͰ͍͏ΞϓϦέʔγϣϯʢαʔϏεʣ૚ • ΞϓϦέʔγϣϯݻ༗ͷϏδωεϧʔϧΛΧϓηϧԽ • γεςϜͷϢʔεέʔεΛ࣮૷͢ΔɻυϝΠϯ΁ͷσʔλͷྲྀΕ Λௐ੔͠ɺ·ͨɺυϝΠϯΦϒδΣΫτ΁ࢦࣔΛग़͢ɻ • ͜ͷ૚ͷมߋ͕υϝΠϯ૚ʹӨڹͨ͠ΓɺDB΍UIͷΑ͏ͳ֎෦ ͷมߋʹΑͬͯӨڹΛड͚ͳ͍Α͏ʹ͢Δ͜ͱ͕େࣄɻ • ͔͠͠ɺΞϓϦέʔγϣϯૢ࡞ʹมߋ͕͋Δ৔߹ɺ͜ͷ૚͸Өڹ Λड͚ΔɻϢʔεέʔεͷৄࡉΛมߋ͢ΔͳΒɺ͜ͷ૚ͷҰ෦ͷ ίʔυ͸࣮֬ʹӨڹΛड͚Δ͜ͱʹͳΔɻ

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Interface Adapters (Controllers/Presenters/Gateways) • ϑϨʔϜϫʔΫͳͲΛ࢖͍ɺ۩ମతͳϝΧχζϜΛ࣮૷͢Δ૚ • ಺ͱ֎ͱͷσʔλʢϑΥʔϚοτʣͷม׵͕ओͳ໾ׂ • Controllerɿ ֎૚͔Βड͚औͬͨσʔλΛ಺૚ͰղऍͰ͖ΔσʔλʢυϝΠϯ ΦϒδΣΫτʣʹม׵͢Δɻྫ͑͹ɺϑΥʔϜϦΫΤετΛυϝΠϯΦϒδΣ Ϋτʹม׵ • Presenterɿ ಺૚͔Β఻͑ΒΕͨσʔλΛ֎૚Ͱ࢖༻͢Δܗʹม׵͢Δɻྫ͑ ͹ɺυϝΠϯΦϒδΣΫτΛJSONʹม׵ • GatewayʢDB΍֎෦αʔϏεʣɿ ಺૚ʹ͸۩ମతͳ΍ΓऔΓʹؔ͢Δίʔυ͸ ஔ͔ͳ͍Α͏ʹ͢Δɻྫ͑͹ɺRDBΛ࢖͏࣌ɺSQLͷఆٛ͸͜ͷ૚ʹݶఆ͢Δ

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Frameworks & Drivers (Web/UI/DB/ExternalInterfaces) • ࠷΋֎ଆͷ૚͸ɺσʔλϕʔε΍WebϑϨʔϜϫʔΫͳͲ ͷπʔϧͰߏ੒͞ΕΔɻ • ͜ͷ૚ʹ઀͢Δ಺ଆͷ૚΁ͭͳ͛ΔͨΊͷάϧʔίʔυ Ҏ্ͷ΋ͷ͸ॻ͔ͳ͍ɻ • Web΍UIɺσʔλϕʔεͷΑ͏ͳ۩ମతͳ࣮૷ٕज़ʹ͸ɺ গͳ͔Βͣ֐͕͋Δɻ • มԽ͕ܹ͍͠෦෼Ͱ΋͋ΔͷͰɺ࠷΋֎ଆʹஔ͍ͯަ׵ Λ༰қʹ͓ͯ͘͜͠ͱ͕υϝΠϯΛकΔ͜ͱʹܨ͕Δɻ

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ઃܭͷϙΠϯτɿڥքͷԣஅ • ԁͷํʹ໨͕ߦ͖͕͚ͪͩΕͲɺઃܭͷ͏ ͑Ͱ͸͕ͬͪ͜ॏཁ • ௨ৗɺController͔Βೖ͖ͬͯͯPresenter ʹग़ͯߦ͘ྲྀΕ • UseCase͸֎૚Λ஌Βͳ͍ͷͰɺग़ྗΛฦ ͢ʹ͸ґଘؔ܎ٯసͷݪଇΛ࢖͍ͬͯΔ  ʢDependency Inversion Principleʣ • ૚ͷڥքΛอͪͳ͕ΒॲཧϑϩʔΛ࣮ݱ ৄࡉ͸ޙ΄Ͳ

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ઃܭͷϙΠϯτɿ૚ͷ਺ • 4ͭͷ૚Ͱද͞Ε͍ͯΔ͚ΕͲɺඞͣ͜͏͠ͳ ͚Ε͹͍͚ͳ͍Θ͚Ͱ͸ͳ͍ɻ • ॏཁͳͷ͸ɺ • ؔ৺ࣄͷ෼཭ • ґଘؔ܎نଇʢ಺૚ͷΈʹґଘ͢Δʣ

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·ͱΊ • ඇৗʹγϯϓϧͳϧʔϧͳͷͰ෼͔Γ΍͍͢ • ૚Ͱ෼཭ • େ੾ͳ΋ͷΛ಺ଆʹஔ͘ • ґଘؔ܎نଇʢ಺ଆʹͷΈґଘʣΛकΔ • ಠཱੑ͸ςετͷ༰қੑʹ΋ߩݙ͢Δ • ٕज़͕ݹ͘ͳͬͨΒ࠷খݶͷखؒͰަ׵Ͱ͖Δ • ϑϨʔϜϫʔΫΛަ׵͢Δ͜ͱ͸͋ͬͯ΋ɺυϝΠϯ஌ࣝΛަ׵ ͢Δͱ͍͏ͷ͸͋Γಘͳ͍

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DDD + Clean Architecture ମݧஊ Clean Architecture͸෼͔Γ΍͍͢ DDDͷ࣮ફ͸νʔϜͰόϥϯεΛߟ͑Δ

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࣮૷αϯϓϧ  github.com/yoskhdia/ cleanArchSample ※Scala + Play! Framework 2.4

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ύοέʔδߏ੒ • Domain(Entities)૚ • Contract૚ • Domain૚ͱͷڮ౉͠  ʢDIΛ࢖͏ͷͰΠϯλϑΣʔε͸ผʹ͍ͯ͠Δʣ • UseCase૚ • Adapter૚ • Repositoryͷ࣮૷Ϋϥε΋͜͜ • ʢExternal૚ʣ • ϑϨʔϜϫʔΫ΍ϥΠϒϥϦͷ૚ͱ͍͏Ґஔ͚ͮ ̐૚Ͱͳͯ͘΋0,

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Domain(Entities)૚ • POSO(Plain Old Scala Object)͕جຊ • ϑϨʔϜϫʔΫ΁ͷґଘ͚ͩͰͳ͘ɺϥΠϒ ϥϦ΁ͷґଘ΋ۃྗগͳ͘ • ࠓͷͱ͜ΖJoda-TimeͷΈʢJava8 Date and Time API΁ͷҠߦ͸ݕ౼தʣ

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Contract/UseCase૚ *OQVU1PSUͷ࣮૷͸ 6TF$BTF͕ߦ͏ ґଘؔ܎ٯసͷݪଇͰ6TF$BTF ͸0VUQVU1PSUʹग़ྗΛ౉͚ͩ͢ ʹ૚͕ด͡ΒΕΔ 0VUQVU1PSUͷ࣮૷͸ 1SFTFOUFS͕ߦ͏ 6TF$BTFͱ෼཭͍ͯ͠ΔͷͰɺ 1VTIܕ΍1VMMܕͳͲ޷͖ʹ૊ Έସ͑ΒΕΔ

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Use Case import scala.concurrent.{ExecutionContext, Future}    trait UseCase {  type In    type Out    protected def call(arg: In)(implicit ec: ExecutionContext): Future[Out]  } "EBQUFS૚ͱͷ࿈ܞ͸1PSUʹҕৡ

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Input PortʢPushܕʣ import scala.concurrent.ExecutionContext  import scala.util.{Failure, Success}  trait PushPort[Arg, Result] {  self: UseCase =>    override final type In = Arg    override final type Out = Result    def execute[T <: Callback[Result]](arg: Arg)(callback: T)  (implicit ec: ExecutionContext): Unit = {  call(arg).onComplete {  case Success(result) =>  callback.onSuccess(result)  case Failure(t) =>  callback.onFailure(t)  }  }  } "EBQUFS૚͔ΒͲ͏໯͏͔ ԿΛฦ͔͢Λఆٛ *OQVU1PSUͷ໾ׂ͸ ड͚औΔ͜ͱ·ͰͳͷͰ 6OJUΛฦ͢

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Pullܕ͸࢖͏͜ͱগͳ͍ͷͰׂѪ αϯϓϧίʔυ͸ͪ͜ΒͰ͢ /app/contract/PullPort.scala

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Output Port trait Callback[Result] {    def onSuccess(result: Result): Unit    def onFailure(t: Throwable): Unit  } ΞϓϦέʔγϣϯϩδοΫͷΤϥʔ΋ ಛผͳ&YDFQUJPOΛ༻ҙͯ͠ฦ͢Α͏ʹ͍ͯ͠Δ ʢ+BWBͷ׳शʹ͍ۙʣ

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Callback vs Promise(Future) • Scalaʹ͸Promise(Future)͕͋Δ • ࢀߟɿhttps://gist.github.com/okapies/5354929  ※هࣄʹର͢Δίϝϯτ(Togetter)·ͰಡΈ·͠ΐ͏ • ௿ϨϕϧͳCallbackͷํ͕ಋೖোน͕௿͍ • ߴϨϕϧͳPromiseΛ࢖͍͍ͨͳΒɺCallbackͷ্ ʹඃͤΔܗͰ࣮૷͢Δ͜ͱ͕Ͱ͖Δ

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Callbackͷ্ʹ PromiseΛࡌͤΔ private class CallbackImpl extends PickedLeaderCallback {  val promise = Promise[UserId]()  override def onSuccess(userId: UserId): Unit = {  promise.success(userId)  }    override def onFailure(throwable: Throwable): Unit = {  promise.failure(throwable)  }  }

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Clean ArchitectureΛ ద༻͢ΔͨΊͷิॿ͸͜Ε͚ͩ

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Use Caseͷఆٛ package contract.usecase    import contract.{PushPort, UseCase}  import domain.{GroupId, UserId}    trait PickLeaderUseCase extends UseCase with PushPort[GroupId, UserId] ࣮͸αϘ͍ͬͯΔ 6TF$BTF૚Ͱѻ͍΍͍͢ ΦϒδΣΫτ %50 ʹ͢Δ

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Use Caseͷ࣮૷ package usecase    import javax.inject.Inject  import contract.usecase.PickLeaderUseCase  import domain.UserRepository    import scala.concurrent.{ExecutionContext, Future}    class PickLeaderUseCaseImpl @Inject()(userRepository: UserRepository) extends PickLeaderUseCase {    override protected def call(groupId: In) (implicit ec: ExecutionContext): Future[Out] = {  userRepository.findBy(groupId).map { board =>  board.pickLeader // ୭ΛͲ͏Ϧʔμʹ͢Δ͔͸υϝΠϯ஌ࣝ  }  }  } ΠϯλϑΣʔεΛ࢖͏ %*ͰґଘΛ୯ํ޲ʹ

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Adapter૚ 3FQPTJUPSZͷ࣮૷Ϋϥε΋ ͜ͷ૚ͷத 42-ఆٛͳͲ ֎͔ΒͷೖྗΛ ಺ଆͷΦϒδΣΫτʹม׵ ྫɿ1045͞Εͨσʔλ ಺͔Βͷग़ྗΛ ֎ଆͷσʔλʹม׵ ྫɿ+40/

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Controller import contract.usecase.PickLeaderUseCase  import domain.GroupId  import play.api.data._  import play.api.libs.concurrent.Execution.Implicits.defaultContext  import play.api.mvc.{Action, Controller}    class GroupController @Inject() (useCase: PickLeaderUseCase, presenter: PickedLeaderPresenter) extends Controller {   val form: Form[GroupId] = ??? // ׂѪ  def pickLeader = Action.async { implicit request =>  form.bindFromRequest.fold(_ => Future.successful(BadRequest("…")), (groupId: GroupId) =>  presenter.response(useCase.execute(groupId))  )  }  } ೖྗσʔλ͔Βͷม׵͕੹຿ ͜ͷॻ͖ํʹ͍ͭͯ͸ޙ΄Ͳ

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Presenter import contract.callback.PickedLeaderCallback  import domain.UserId  import play.api.libs.json.Json  import scala.concurrent.{ExecutionContext, Future, Promise}    class PickedLeaderPresenter extends Presenter[PickedLeaderCallback] {    implicit val writer = Json.writes[UserId]    override def response(call: UseCaseExecutor) (implicit ec: ExecutionContext): Future[Rendered] = {  val callback = new CallbackImpl  call(callback)  callback.promise.future.map { userId =>  Ok(Json.toJson(userId))  }  }  } ग़ྗσʔλ΁ͷม׵͕੹຿

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ControllerͰPresenterͷ໾ׂΛ ݉೚ͯ͠΋ྑ͍ͷͰ͸ʁ • ࠓճͷΑ͏ͳখن໛ͳ΋ͷͩͱɺͻͱͭͷΫϥεʹશ෦ॻ ͍ͯ͠·͍ͨ͘ͳΔ • ໾ׂͷҟͳΔ΋ͷΛҰͭͷΫϥεʹೖΕΔͷ͸୯Ұ੹೚ ͷݪଇʹ൓͢Δ • Controller͸ೖྗͷม׵ɺPresenter͸ग़ྗͷม׵ʹઐ೦ ͢Δ͜ͱͰංେԽ͕๷͛Δʢίʔυ͸੒௕͢Δʣ • ҰํͰίϯτϩʔϥΛ෼ׂ͢Δٕज़΋࿩୊ʹ  ઃܭʹ͓͍ͯԿΛੋͱ͢Δ͔ɺ͚ͩ

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PresenterΛUseCaseʹ ౉ͯ͠΋ྑ͍ͷͰ͸ʁ • UseCase͔Β௚઀݁ՌΛฦ͢͜ͱʹͳΔ • UseCase૚ҎԼʹPresenterͷΠϯλϑΣʔεʢ΋͘͠͸Ϩεϙϯ εͷܕʣ͕ඞཁʹͳͬͯ͠·͏ɻͦΕ͸ɺUseCase૚͕֎ଆͷ૚ ͷ໾ׂ΋݉೚͍ͯ͠Δ͜ͱʹͳͬͯ͠·͏ͷͰ޷·͘͠ͳ͍ • ୯Ұ੹೚ͷݪଇ͸΋ͱΑΓɺ૚ͱܾͯ͠ΊΒΕͨ໾ׂʹઐ೦ͯ͠૚ ΛแΜͰ͍͘͜ͱͰɺ಺ଆͷಠཱੑ্͕͕Δ  ʹ֎ଆͷަ׵༰қੑ্͕͕Δ OK: presenter.response(useCase.execute(groupId))  NG: useCase.execute(groupId)(presenter.response) 

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ͦͷଞ • GuiceͷΑ͏ͳDIίϯςφΛ࢖͏ͷ͔ɺScalaͷݴޠػೳΛ ࢖ͬͯίϯύΠϧ࣌DIΛ͢Δͷ͔͸ࣗ༝ • DIίϯςφ͸࣮੷͕͋ΔͷͰɺແཧͯ͠ίϯύΠϧ࣌DI ʹ͢Δඞཁ͸ແ͍ͱࢥ͍·͢ɻྫ͑͹ɺScalaΑΓ΋Java ͷํ͕෼͔Δϝϯόʔ͕ଟ͍ͳΒૉ௚ʹDIίϯςφ࢖͍ ·͠ΐ͏ɻ • ࠓճ͸ύοέʔδͰ૚Λ෼཭͍ͯ͠·͕͢ɺϚϧνϓϩδΣ ΫτͰ෼཭͢Δͱ૚ͷґଘΛڧ੍Ͱ͖ΔͷͰΑΓ޷·͍͠

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ϓϩμΫτͰͷऔΓ૊Έ

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୊ࡐ֓ཁ • ϑϩϯτͱAjaxͰ΍ΓऔΓ͢ΔAPIαʔϏε • ݱߦͰ͸RailsͰ࡞ΒΕ͍ͯͯɺࠓճ͸ϦϓϨʔε • ࢓༷͸ݱߦ౿ऻ • Ϟσϧ͸ActiveRecord͔Β୤٫ • Scala + Play! Framework • ߴෛՙ • ग़དྷΔݶΓ1౓ͷϦΫΤετʹ͓͞Ί͍ͨ • σʔλετΞͳͲ֎෦Ϧιʔε΁ͷΞΫηε͕ूத @@'MJQEFTL@@

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՝୊ • ActiveRecordΛ࢖͍ͬͯͨ͜ͱͰɺϞσϧͱσʔλΞΫηε͕ ີʹͳ͍ͬͯͨ  ˠͲͪΒͷ౎߹ʹ΋ҾͬுΒΕΔ • ϑΝοτϞσϧ΋ࢄݟ͞Εͨ  ˠ੹຿͕ଟ͍ͱվम೉౓͕ߴ͍ • νϦ΋ੵ΋Ε͹Ͱɺߴෛՙʹͳͬͨͱ͖ʹશମ͕εϩʔμ΢ϯ  ˠͲ͜ͰσʔλΞΫηε͍ͯ͠Δͷ͔௥͏ͷ͕େมͳͷͰख͕ ଧͪʹ͍͘

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՝୊ͷଟ͘͸ σʔλΞΫηεʹू໿͞ΕΔ

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DDD + Clean ArchitectureͰ σʔλΞΫηεΛίϯτϩʔϧ༰қʹ • DDDʹै͏ͱRepositoryΛ࢖͏ݸॴ͸ΞϓϦέʔγϣ ϯαʔϏεʢUseCaseʣ͔υϝΠϯαʔϏεʹݶఆ͞ Ε͍ͯ͘ • ू໿(Aggregate)͕ϥΠϑαΠΫϧ·Ͱ୲͏ͱ੹຿ ͕େ͖͘ͳΓ͗͢ΔʢIDDD p.254ʣ • ࣗવͱσʔλΞΫηεݸॴ͕෼͔Γ΍͘͢ ※υϝΠϯαʔϏεɿෳ਺ͷΤϯςΟςΟʹ·͕ͨΔৼΔ෣͍ͳͲɺΤϯςΟςΟ͕ ࣋ͭʹ͸ద͞ͳ͍ৼΔ෣͍Λఆٛͨ͠υϝΠϯΦϒδΣΫτ

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DDD + Clean ArchitectureͰ σʔλΞΫηεΛίϯτϩʔϧ༰қʹ • ࠓͷͱ͜ΖυϝΠϯαʔϏεͰRepositoryΛ࢖͍͍ͨέʔε͸ग़͍ͯ ͳ͍ͷͰɺUseCaseͰͷΈRepositoryΛ࢖͑ΔΑ͏ʹͯ͠ࢼ͍ͯ͠Δ • ҙਤͤͣԿ౓΋ݺͼग़ͯ͠͠·͏Մೳੑ͕͋Δˍ࢖͑Δঢ়ଶͩͱ࢖ ͍ͨ͘ͳΔͷ͕ਓ৘ͳͷͰActiveRecordͷೋͷ෣͍ʹͳΒͳ͍Α͏ ஫ҙΛ෷͍ͬͯΔ • ґଘؔ܎نଇʹΑͬͯ૚͕ด͡ΒΕ͍ͯΔͷͰɺͲ͜ͰσʔλΞΫ ηε͍ͯ͠Δ͔෼͔Γ΍͘͢ͳͬͨ • σʔλετΞ͕Ұ൪֎ͳͷͰަ׵͕͠΍͘͢ͳͬͨɻElasticsearch ൛ͱDynamo൛ͰύϑΥʔϚϯεൺֱ͔ͯ͠Β࠾༻ΛܾΊΔ౳Մೳ

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ิ଍ɿRepository I/F • αϯϓϧͰ͸Ԡ༻ൣғ޿ΊʹDomain૚ʹஔ͍͍ͯ·͢ ͕ɺϓϩμΫτͰ͸Contract૚ʹஔ͍͍ͯ·͢ • PortʹRepositoryͱଊ͑ͯUseCase૚ͰͷΈΞΫηεΛ ڐՄʢI/FΛஔ͖ʣ͠ɺͦͷPort(Repository)ͷ࣮૷ʢܧ ঝʣ͕Adapter૚Ͱ͞Ε͍ͯΔɺͱ͍͏ղऍ • RepositoryΛͲ͏͢Δ͔͸"ઃܭͷ՝୊"  υϝΠϯϞσϧΛߟ͑Δ͏͑Ͱ͸ຊ࣭Ͱ͸ͳ͍

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೉͍͠఺ • υϝΠϯΦϒδΣΫτΛUseCaseͰ༻ҙͯ͠ࢦࣔΛग़͢ ඞཁ͕͋ΔͷͰɺจ຺ͱͯࣗ͠વͳͷ͔ɺೲಘͰ͖Δ͔ Λ܁Γฦ͠ߟ͑Δඞཁ͕͋Δɻ • υϝΠϯαʔϏεࣗମ͕ͦ΋ͦ΋ۃྗ࢖Θͳ͍ํ͕ྑ ͍΋ͷͰ͸͋Δ͚ΕͲɺෳ਺ͷΤϯςΟςΟʹؔ܎͢ ΔΑ͏ͳৼΔ෣͍͸υϝΠϯαʔϏεͷํ͕ࣗવɻ • ៉ྷͳDDDͱγϏΞͳύϑΥʔϚϯεཁ݅ͷόϥϯεΛ ৗʹߟ͑Δ

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τϥϯβΫγϣϯʹ͍ͭͯ • "ू໿ʢAggregateʣ͸τϥϯβΫγϣϯ੔߹ੑͷڥքͱಉٛ" ʢIDDD p.340ʣͳͷͰɺҰͭͷू໿Λѻ͍ͬͯΔؒ͸Repositoryͷ தʹด͡Δ͜ͱ͕Ͱ͖Δɻ • ໰୊͸ɺෳ਺ͷू໿ͷߋ৽Λ୯ҰͷτϥϯβΫγϣϯ಺ͰߦΘͳ͚ Ε͹͍͚ͳ͍࣌ 1. ݁Ռ੔߹ੑͰे෼Ͱ͸ͳ͍͔Λݕ౼͢Δ  ˠτϥϯβΫγϣϯͷແ͍ੈք΁ʢႈ౳ͳૢ࡞͸ඞཁʣ 2. ৽͍͠ू໿ͱͯ͠ఆٛ͢Δ  ˠ͜ΕΛ܁Γฦ͢ͱڊେͳू໿ʹͳͬͯ͠·͏ͷͰ஫ҙ

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ίωΫγϣϯʹ͍ͭͯ • RepositoryΛUseCase૚ʹݶఆ͍ͯ͠ΔͷͰίωΫγϣ ϯΦϒδΣΫτ͕ݱΕΔͷ͸͜͜·ͰͰࡁΜͰ͍Δ… • ΋͠ɺυϝΠϯαʔϏεͰ΋RepositoryʹΞΫηεͨ͠ ͍৔߹͸ίωΫγϣϯΛ౉͞ͳ͚Ε͹͍͚ͳ͍͕ɺ͜Ε ͸υϝΠϯͷؔ৺Ͱ͸ͳ͍఺ʹ્·ΕΔ • implicitͰݱΕΔ෼ʹ͸ڐ༰͢Δʁ • ϨΠϠεʔύʔλΠϓʢجఈΫϥεʣʹӅṭ͢Δʁ

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Ϣʔεέʔεۦಈ։ൃʹ ग़ձͬͨ࿩ ઃܭͷલʹ༧උઃܭΛͯ͠ ᐆດੑΛഉআ͢Δ

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͍͟DDDΛ࣮ફ͠Α͏ͱ͢Δͱ • Կ͔Β࢝Ίͯྑ͍͔෼͔Βͳ͍ • υϝΠϯΤΩεύʔτͱͲ͏࿩ͤ͹ྑ͍͔෼͔Βͳ͍ • UIແ͠ͰυϝΠϯ͚ͩΛ࿩ͯ͠΋্ख͘఻ΘΒͳ͍ • ࠷ॳ͔ΒৄࡉͳΫϥεਤΛॻ͜͏ͱͯ͠͠·͏ • ࢼ͠ʹϞσϧ͚ͩͰ΋ॻ͍ͯΈΔͱࢥ͍ͷ֎ϘϦϡʔϛΟ • υϝΠϯϞσϧʢΫϥεਤʣ͔Β࢓༷ΛಡΈऔΔͷ͕ࠔ೉ • ૝૾ͯ͠ಡΈऔΖ͏ͱ͢Δͱᐆດ͞ʹ௚໘͢Δ ㅟ ㅟ ㅟ ※ฐࣾࣄྫ͚ͩͰͳ͘ໝ૝΋ؚ·Ε·͢

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υϝΠϯϞσϧ͚ͩʹ ண໨͍ͯ͠Δͱ ྲྀΕ͕Θ͔Βͳ͘ͳΔ

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IUUQCMPHUIMJHIUDPNVODMFCPC UIFDMFBOBSDIJUFDUVSFIUNM ͲͪΒ΋Ϗδωεϧʔϧ 6TF$BTF͸ ΞϓϦέʔγϣϯݻ༗ͷ Ϗδωεϧʔϧ

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Ϣʔεέʔεʢ΍ετʔϦʔʣ ʹΑͬͯυϝΠϯϞσϧ͸ ࢖ΘΕΔ

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ϑ Υ ϩ ʔ

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Ϣʔεέʔε೉ຽ

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ॻ੶ ʮϢʔεέʔεۦಈ։ൃ࣮ફΨΠυʯ • Use Case Driven Object Modeling with UML • ICONIXϓϩηεͷղઆຊ • ඇৗʹܰշͳޠΓޱʢ͏ͻΌʔͱ͔ग़ͯ͘Δʣ • एׯXP൱ఆʢߟ͑ࣗମ͸XPΑΓલ͔Β͋Δʣ • ͍͖ͳΓઃܭʹೖΔͷͰ͸ͳͯ͘ɺ·ͣ͸෼ੳΛͪΌΜͱ͠Α͏ɻ • ಛʹʮՄೳͳݶΓ؆୯ʹ(DTSTTCPW)ʯͱʮͦΜͳ΋ͷ͸ඞཁͳ͍ (YAGNI)ʯΛཧ༝ʹ୅ସίʔεʢΤϥʔέʔεʣΛߟྀʹؚΊͳ͍ ͜ͱ͸ഁ໓΁ͷಓͱ͍ͯ͠Δɻ

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·࣮ͩફஈ֊Ͱ͸ͳ͍ͷͰ ࠓճ͸঺հ͚ͩɾɾɾ

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ICONIXϓϩηε͕໨ࢦ͢τίϩ • ᐆດ͞Λഉআ͢Δ͜ͱ͕ୈҰ • Ͳ͔ͪΒͱ͍͏ͱυΩϡϝϯτେࣄ࿦ௐ • ͱݴͬͯ΋ɺʢίʔυϑΝʔετͰ͸ͳ͍ͩ ͚Ͱʣ໨తΛୡ੒͢Δ͜ͱʹ஫ྗͯ͠ɺମࡋ ΍༨෼ͳ΋ͷΛ࡟͗མͱͨܰ͠ྔͳυΩϡ ϝϯτΛਪ঑͍ͯ͠Δɻ

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ICONIXϓϩηεશମ૾ ͔͜͜Β࢝·ΔΑ͏ʹ ݟ͑Δ͚ΕͲɾɾɾʁ ಈతͳϫʔΫϑϩʔͱ ੩తͳϫʔΫϑϩʔ͕ ͋Δ

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ཁٻϑΣʔζ 1. ސ٬͔Βେখ༷ʑͳػೳཁٻ͕ग़ͯ͘Δ  ʢཁٻऩू͸ICONIXͷൣғ֎ɺॻ੶ʹ͸ΞυόΠεܝࡌʣ 2. υϝΠϯϞσϧͰݴ༿Λ౷Ұ͢Δͱ͜Ζ͔Β࢝ΊΔ 3. ࢴࣳډʢϓϩτλΠϓʣΛ࢖ͬͯސ٬͔ΒৼΔ෣͍ཁٻΛ ฉ͖ग़͢ 4. υϥϑτ൛ͷϢʔεέʔεΛ࡞੒͢Δ 5. ސ٬ͱҰॹʹϨϏϡʔΛߦ͏ ㅟ ㅟ ㅟ

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෼ੳϑΣʔζ 1. υϥϑτ൛Ϣʔεέʔε͔Βϩόετωε෼ੳΛߦ͏ 2. ݟམͱͨ͠Ϋϥεͷൃݟ΍ᐆດ͞Λআڈͨ݁͠ՌΛυϝΠϯϞσϧʹ ϑΟʔυόοΫ͢Δ 3. ʢϩόετωεਤதͷʣίϯτϩʔϥʹ໌֬ͳ໊લΛ෇͚Δ  ˠ͜Ε͕"ৼΔ·͍"ʹͳΔ 4. υϥϑτ൛ϢʔεέʔεΛॻ͖௚͢ 5. ސ٬ͱҰॹʹϨϏϡʔΛߦ͏ ㅟ ㅟ ㅟ ※෼ੳʙ࣮૷ϑΣʔζ͸Ϣʔεέʔε୯ҐʹΠςϨʔςΟϒʹߦ͏

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ৄࡉઃܭϑΣʔζ 1. Ϣʔεέʔεͱϩόετωεਤ͔Βγʔέϯεਤ Λ࡞੒͢Δ 2. γʔέϯεਤΛॻ͖ͳ͕ΒɺυϝΠϯϞσϧʹৼ Δ෣͍ΛׂΓ౰ͯɺΫϥεਤ΁సԽ͍ͯ͘͠ 3. σβΠϯύλʔϯͳͲΛ༻͍ͯɺઃܭ্ͷ໰୊ղ ܾ΍վળΛߦ͏ 4. ։ൃऀ಺ͰϨϏϡʔΛߦ͏ ㅟ ㅟ ㅟ ㅟ

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࣮૷ϑΣʔζ 1. ίʔσΟϯάɾ୯ମςετ 2. Ϣʔεέʔεʹج͍ͮͨ݁߹ςετΛߦ͏ 3. ʢγεςϜςετ΍σϓϩΠʣ 4. ࣍ͷΠςϨʔγϣϯʹ޲͚ͯɺίʔυϨϏϡʔ ͱυϝΠϯϞσϧͷߋ৽Λߦ͏ 5. ෼ੳϑΣʔζʹ໭Γɺ࣍ͷϢʔεέʔεΛਐΊΔ

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ICONIXϓϩηε͸DDDͷ࣮ફ ࣮͸͔͜͜Β ࢝·Δ υϝΠϯϞσϧΛҭͯΔͨΊʹɺ ϢʔεέʔεΛ࢖ͬͯۦಈ͍ͯ͠Δ ϢʔεέʔεϞσϧ͸ ίϯςΩετͷൃݟʹ ΋໾ཱͭ ϩόετωε෼ੳ౳Λ͠ͳ͕Β υϝΠϯϞσϧΛߋ৽

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෼ੳͷඞཁੑ • DDDͰ͸७ਮͳ෼ੳϞσϧΛ൱ఆ͍ͯ͠Δ • ७ਮͳ෼ੳϞσϧ͸ίʔσΟϯά͕࢝·ΔͱࣺͯΒΕͯ͠·͏ ͜ͱ͕ཧ༝ɻ͕ɺ͜Ε͸։ൃऀͱ෼ੳऀ͕෼͔Ε͍ͯΔલఏ • ʮ෼ੳͱઃܭͷؒʹக໋తͳُ྾͕ੜ͡ΔͨΊɺͦΕͧΕͷ ࡞ۀͰಘΒΕΔಎ࡯͸ޓ͍ʹ׆͔͞ΕΔ͜ͱ͕ͳ͍ͷͩɻʯ • ʮ஌ࣝΛטΈࡅ͘ऀ͸Ϟσϧͱઃܭ͓ΑͼίʔυΛ୯Ұͷ׆ಈ ͱͯ͠վྑ͠ଓ͚ΔΠςϨʔςΟϒͳϓϩηεͱͳΔʯ  (DDD p.46 - 47)

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DDDͰ͍͏࣮ફతϞσϥ ΛϓϩηεԽͨ͠΋ͷ͕ICONIX ʢͱߟ͑Δͱ෼͔Γ΍͍͢ʣ

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–ʮϢʔεέʔεۦಈ։ൃ࣮ફΨΠυʯ1ষத “௨ৗɺԿΒ͔ͷઃܭ࡞ۀΛߦΘͳ͍ݶ Γɺࣗ෼͕औΓѻ͏ཁٻΛਖ਼͘͠ཧղ͢ Δ͜ͱ͸Ͱ͖ͳ͍ɻ”

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શͯͷϢʔεέʔεΛ෼ੳ͠ͳ ͚Ε͹͍͚ͳ͍ʁ • ͍͖ͳΓશͯͷϢʔεέʔεΛ෼ੳ͢Δඞཁ͸ ͳ͍ɻICONIXϓϩηε͸1ͭͷϢʔεέʔε ͕͋Ε͹ۦಈͤ͞Δ͜ͱ͕Ͱ͖Δɻͱ͸͍ ͑ɺͨͬͨ̍ͭͷখ͞ͳϢʔεέʔεͰࡁΉι ϑτ΢ΣΞͷํ͕ك • Ͳ͏΍ͬͯείʔϓΛߜ͍͔ͬͯ͘ʹͭ ͍ͯ͸ɺϢʔβʔετʔϦʔϚοϐϯά ͕ࢀߟʹͳΓ·͢ɻ

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XPͱͷؔ܎ • XP͸͋͘·Ͱ΋ʮՁ஋ɾݪଇɾϓϥΫςΟεʯɻICONIX͸෼ੳ͓ ΑͼઃܭͷϞσϦϯάϓϩηεͳͷͰɺछʑͷํ๏࿦ʹద༻͠΍͢ ͍ɻ • ʮຊ෺ͷސ٬ࢀՃʯ͕೉͍͜͠ͱΛड़΂͍ͯΔɻͦͷͨΊʹɺϨ ϏϡʔΛϓϩηεʹ૊ΈࠐΜͰ͍Δɻ  ˠνʔϜʹΑͬͯςʔϥϦϯά͢Ε͹ྑ͍ • ICONIXϓϩηεͰ͸ɺετʔϦʔ͔Β͙͢ίʔυΛॻ͖࢝Ίͳ͍  ˠνʔϜͷशख़౓΍ن໛ʹΑͬͯςʔϥϦϯά͢Ε͹ྑ͍  ɹ͔͠͠ɺυϝΠϯ஌ࣝΛ๛෋ʹ΋ͭϓϩάϥϚͷํ͕গͳ͍ݱ࣮

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Clean Architectureͱͷ਌࿨ੑ • "UseCase૚"ͱͦͷ·Μ·ͷ૚͕͋ΔͷͰؔ܎͕෼͔Γ΍͍͢ʢ"ΞϓϦέʔ γϣϯαʔϏε"ͱ͍͏ݴ༿ΑΓ͸ྑ͍ͱࢥ͏ɻϢʔεέʔεͱ͍͏ݴ༿Ͱͳ͍ ͷ͸ɺʢICONIXͳͲΛ࢖Θͳ͍ͱʣৄࡉͳٕज़ཁૉΛೖΕͯ͠·͍΍͍͔͢Β Ͱ͸ʁʣ • ۩ମతͳϑϨʔϜϫʔΫ΍DB͕ܾ·͍ͬͯͳͯ͘΋։ൃΛਐΊΔ͜ͱ͕Ͱ͖Δ • ICONIXϓϩηε͸UseCase૚ͱDomain૚ͷؔ৺ࣄʹ͍ͭͯѻ͏ • Clean Architecture͸ΞϓϦέʔγϣϯʢUseCase&DomainʣͱΠϯϑϥΛ ෼཭͢Δ • Hexagonal΍OnionͰ΋ಉ༷

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ద༻΁ͷߟ࡯̍ ਖ਼ࣜͳυΩϡϝϯτʹ͠ͳ͍ • ސ٬ͱʮԿΛͭ͘Δͷ͔ʯΛᐆດ͞Λղফͯ͠߹ҙ͢Δ͜ͱ͕େࣄ • ICONIXϓϩηεͰ͸ʮ࡞੒͢ΔυΩϡϝϯτ͸͜ΕͰɺͦΕΛϨ Ϗϡʔ͢Δػձ͸͍ͭʯΛ໌֬ʹఆ͍ٛͯ͠Δɻ • ਖ਼֬ʹॻ͘͜ͱ͸ਪ঑͍ͯ͠ͳ͍ʢॏްͳυΩϡϝϯτ͸଍ ᐫʣɻUML࢓༷ʹ४ڌ͢Δඞཁ͸ͳ͍ɻۃ୺ͳ࿩ɺϗϫΠτ Ϙʔυͷམॻ͖Ͱ΋ྑ͍ʢͱࢥ͏ʣɻ • ॻ੶தͰ͸πʔϧΛ࢖͏͜ͱΛલఏʹɺίʔυͱઃܭΛಉظ͢ Δ͜ͱ͸ڧ͘ਪ঑͞Ε͍ͯΔɻࢴͱԖච͕Ұ൪ڧ͍͔΋͠Εͳ ͍ɻʮΊ΋Ͱ͘͢ʯͱ͔ࢼͯ͠Έ͍ͨɻ

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ద༻΁ͷߟ࡯̎ ੔߹ੑཁٻͷݕ౼ • ސ٬͕ࢀՃ͢ΔϨϏϡʔ͸༧උઃܭϨϏϡʔ·ͰʢγʔέϯεਤҎ ߱͸ٕज़త͗͢ΔʣɻؾΛ͚ͭͳ͍ͱϩόετωε෼ੳͷஈ֊Ͱ ͸੔߹ੑཁٻͷදݱ·Ͱٴ͹ͳ͍ؾ͕͢Δɻ • શͯʹτϥϯβΫγϣϯ͕ඞཁͱ͸ݶΒͣɺ݁Ռ੔߹ੑͰे෼ ͳέʔε΋ଟ͍͸ͣɻ • ༧උઃܭϨϏϡʔͷஈ֊·Ͱʹ੔߹ੑͷཁٻʢϨϕϧʣʹ͍ͭ ͯݕ౼ͨ͠ํ͕ྑ͍ͱࢥ͏ɻ • "τϥϯβΫγϣϯͷ෼ੳΛ͔ͯ͠ΒͰͳ͍ͱɺू໿ͷઃܭͷྑ ͠ѱ͠Λਖ਼͘͠൑அ͢Δ͜ͱ͸Ͱ͖ͳ͍"ʢIDDD p.340-344ʣ

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։ൃϓϩηεͷ มߋ͸೉͍͠ɾɾɾ νʔϜͷܾ·Γʁ ձࣾͰنఆ͞Ε͍ͯΔʁ ސ٬͔Βࢦఆ͞Ε͍ͯΔʁ

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–Team Geek ʮ5.6 ر๬͸࢒͞Ε͍ͯΔʯΑΓ “࠷ॳʹ΍Βͳ͚Ε͹͍͚ͳ͍ͷ͸ɺ࢓ࣄ Λୡ੒͢ΔͨΊʹԿ͔Λม͑Δ͜ͱͩɻ”

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ͦΕͰ΋ਏ͘ͳͬͨΒɾɾɾ

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XXXXBOUFEMZDPNQSPKFDUT ΠϠʔά΢θϯμφʔ

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·ͱΊ • DDD  + Clean Architecture  + Use Case Driven Object Modeling(ICONIX)  ͷηοτ͸૬ੑ͕ྑͦ͞͏ • ICONIX͸ܰྔͱ͸͍͑ɺͦͷதͰ΋Ͳ͜·ͰΛ࣮ࢪ͢Δ͔ ސ٬΍νʔϜͱςʔϥϦϯάͨ͠ํ͕ྑ͍͔΋ • ֖Λ։͚Ε͹஌͍ͬͯΔਓʹ͸౰ͨΓલ…  ૣ͘஌Γ͔ͨͬͨ  ʢଞͷ࣮ફख๏΋͝ଘ஌ͷํ͕͍Βͬ͠ΌΕ͹ޙͰڭ͍͑ͯͩ͘͞ʣ

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Q & A

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Q & A vol.1 • Q.Contract૚ͷ༝དྷ͸ʁ  A.֎ଆͷ૚Ͱ࢖͏ͨΊʹɺ͜ͷϢʔεέʔε͸͜ͷ੹຿͕͋Γ·͢ͱܖ໿͍ͯ͠ ·͢ɻ͜ͷΠϯλϑΣʔεΛஔ͘૚Ͱ͢ɻαϯϓϧͰ͸লུ͍ͯ͠·͕ͨ͠DTO ͷΑ͏ͳϢʔεέʔε͕ඞཁͱ͢Δ΋ͷ΋ؚΈ·͢ɻ • Q.CQRSͱͷ਌࿨ੑ͸ʁ  A.͝ΊΜͳ͍͞ɺ·ͩ໌֬ͳ౴͕͑Ͱ͖ͳ͍Ͱ͢ɻΞʔΩςΫνϟ͸ߏ଄Λͭ͘ ΔͨΊͷ΋ͷͳͷͰɺద༻Ͱ͖ͳ͍͜ͱ͸ͳ͍ͱࢥ͍ͬͯ·͢ɻ͕ɺޙ൒ͷεϥ ΠυͷΑ͏ʹϩοΫΠϯ͞Εͨํָ͕ͳ͜ͱ΋͋Γ·͢ɻ  Ұ౓Կ͔͠ΒͷϑϨʔϜϫʔΫΛ࢖͑͹ɺجຊ࢖͍ଓ͚ΔΑͶͱ͍͏ߟ͑΋ݱ࣮ ղͱͯ͠͸ΞϦͳͷͰɺνʔϜɺͻ͍ͯ͸ϓϩμΫτͱͯ͠Ͳ͏͍͏ઓུΛͱΔ ͔ɺͰ͢ɻݸਓతʹ͸ϩοΫΠϯ͞ΕͣʹυϝΠϯͷಠཱੑΛอͭಓΛ໛ࡧͨ͠ ͍Ͱ͢Ͷɻ

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Q & A vol.2 • Q.Clean ArchitectureΛಋೖ͢ΔͨΊͷΞυόΠε͸ʁ  A.͋͘·ͰΞʔΩςΫνϟͳͷͰMVCΛ࠾༻͠·͔͢ʁDCIΛ࠾༻͠·͢ ͔ʁͱಉ͡ઢͷԆ௕Ͱ͢ɻνʔϜͰཧղ͠΍͍͢΋ͷΛ·ͣ࿩͠߹͏ͷ͸Ͳ ͏Ͱ͠ΐ͏͔ʁ్தͰม͑Δͷ͸೉͍͠ͱࢥ͍·͢ɻ  ·ͣ͸ࠓճͷαϯϓϧΛԼ஍ʹͯ͠ɺҰ͔ͭೋͭϢʔεέʔεΛ࣮૷ͯ͠Έͯ ײ֮Λ௫Ήͷ͸ྑ͍͔΋͠Ε·ͤΜɻͨͩ͠ɺCallbackΛ࢖͏ͷ͔Promise Λ࢖͏ͷ͔ͷΑ͏ͳςʔϥϦϯά͸ͨ͠ํ͕ྑ͍Ͱ͢ɻϓϥοτϑΥʔϜ΍ ࠾༻ٕज़ͷ౎߹ͳͲɻ  ະ஌orܦݧ͕ͳ͚Ε͹ɺখ͞ͳͱ͜Ζ͔Β࢝Ί·͠ΐ͏ɻ࠷খͷܗ͕αϯϓ ϧίʔυͰ͢ɻඞཁʹԠͯ͡΍ɺ༧Ί༧ظͰ͖Δ͜ͱΛࡌ͍͖ͤͯ·͠ΐ͏ɻ ϕʔεΛ࡞Δ࣌ͷίπ͸ϩδοΫΛ૊Ήਓʹ͜͏ॻ͍ͯཉ͍͠ɺΛ૝૾ͯ͠ ੍͋͑ͯ໿Λ࡞Δ͜ͱͱࢥ͍·͢ɻ

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ࢀߟɿDDDฤ • ॻ੶ʮΤϦοΫɾΤϰΝϯεͷυϝΠϯۦಈઃܭʯʢᠳӭࣾʣ • ॻ੶ʮ࣮ફυϝΠϯۦಈઃܭʯʢᠳӭࣾʣ • ਿຊ ܒ ࢯʮυϝΠϯۦಈઃܭ at DDD.rb #5ʯ • ਿຊ ܒ ࢯʮ2ͭͷυϝΠϯϞσϧʕDDDͷؚҙʯ • ૿ా ږ ࢯʮ3ि࿈ଓDDDͦͷ1 υϝΠϯۦಈઃܭͷجຊΛཧղ͢Δʯ • ૿ా ږ ࢯʮ3ि࿈ଓDDDͦͷ2 ਂ͍Ϟσϧͷ୳ٻ(υϝΠϯۦಈઃܭ ୈ̏෦) ʯ • ૿ా ږ ࢯʮ3ि࿈ଓDDDͦͷ3 υϝΠϯۦಈઃܭ ઓུతઃܭ ʯ • InfoQʮυϝΠϯۦಈઃܭɾ։ൃͷ࣮ફʯ • InfoQʮίϯςΩετϚοϐϯάʹΑΔઓུతυϝΠϯۦಈઃܭʯ • InfoQʮShane HastieࢯɺϏδωε՝୊ʹର͢ΔΞδϟΠϧϚΠϯυηοτͷద༻ʹ͍ͭͯޠΔʯ

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ࢀߟɿClean Architectureฤ • ετϥςδοΫνϣΠεʮϨΠϠʔυΞʔΩςΫνϟʯ • Alistair Cockburn ࢯʮHexagonal Architectureʯʢ຋༁ɿ෢౻ ࢯʣ • Jeffrey Palermo ࢯʮThe Onion Architectureʯ • Robert Martin ࢯʮThe Clean Architectureʯʢ຋༁ɿ෢౻ ࢯʣ • Thomas PIERRAIN ࢯʮA zoom on the hexagonal/clean/onion architectureʯ • InfoQʮυϝΠϯۦಈઃܭͱΦχΦϯΞʔΩςΫνϟʯ • InfoQʮΞʔΩςΫνϟͷ໨త͸ҙਤͰ͋ΓɺϑϨʔϜϫʔΫͰ͸ͳ͍ʯ • James Coglan ࢯʮ໋ྩܕͷίʔϧόοΫɺؔ਺ܕͷϓϩϛε: Node ͕ҳͨ͠࠷େͷػձʯ(຋༁ɿԬຊ ࢯ) • Togetter·ͱΊʮ”໋ྩܕͷίʔϧόοΫɺؔ਺ܕͷϓϩϛε”΁ͷ൓Ԡʢͱͦͷޙʣʯ • _kondeiࢯʮ࣋ଓՄೳͳ։ൃΛ໨ࢦ͢ ~ υϝΠϯɾϢʔεέʔεۦಈʢΫϦʔϯΞʔΩςΫνϟʣ + ୯ํ޲ʹ੍ݶͨ͠ॲཧ + FRPʯ • ૿ా ږ ࢯʮυϝΠϯϞσϧத৺ͷΞʔΩςΫνϟʯ • Android cleanarchitecture

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ࢀߟɿϢʔεέʔεۦಈ։ൃฤ • ॻ੶ʮϢʔεέʔεۦಈ։ൃ࣮ફΨΠυʯʢᠳӭࣾʣ • ॻ੶ʮΤΫετϦʔϜϓϩάϥϛϯάୈ2൛৽༁ʯʢΦʔϜࣾʣ • ॻ੶ʮϢʔβʔετʔϦʔϚοϐϯάʯʢΦϥΠϦʔδϟύϯʣ • ૿ా ږ ࢯʮ࣮ફ ICONIXϓϩηεɿγʔέϯεਤͱΫϥεਤʯ • ૿ా ږ ࢯʮ࣮ફ ICONIXϓϩηεɿυϝΠϯۦಈʯ • WikipediaʮICONIXϓϩηεʯ • EZʮϏδωεཁٻͷٸܹͳมԽʹରԠ͢Δ։ൃϓϩηεͱ͸ʁʯ