Clean Architecture: クライアントアプリの「中心」とは何か / 20200121 the center of the client #ios_ca

by takasek

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ΫϥΠΞϯτΞϓϦ ͷʮத৺ʯͱ͸Կ͔ b . 2020/1/21 i S le n rc it ct reษڧձ 1

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t ka ek @t ka ek W rk O S: ActionClosurable౳ A p: PasteTheType A ti le Q it ʮ͓લΒ͕M de ͱݺͿΞϨΛ ͳΜͱݺͿ΂͖͔ʯ P AK ʮi SΞϓϦઃܭύλʔϯೖ໳ʯ ʢڞஶʣ 2

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ۙگ ࠷ۙస৬ͯ͠ i SΤϯδχΞͰ͸ ͳ͘ͳΓ·ͨ͠ 4

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35ࡀఆ೥આͬͯ͜ͱʹ͠·͢ 5

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ಉੈ୅͸ఆ೥ͤͣʹؤுͬͯ·͢Ͷʢฏ੒͔Βોͬͨࠓ೥य़ͷ৽Ξχϝʣ 6

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ຊ୊ 7

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C ea A ch te tu eͷ ʮத৺ʯͱ͸Կ͔ 8

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Ө͕͋Δ…ʁ ౳ߴઢΈ͍ͨ…ʁ 1

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Q. C ea A ch te tu eͷ ʮத৺ʯͱ͸Կ͔ A. ૑քࢁͷࢁ௖ 1

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ͪͳΈʹy ͞Μͷ ʮV ݚڀಡຊʯͰ΋ ཱମతͳදݱ͞Εͯ·͢ https://swift.booth.pm/ items/1758609 1

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΋ͬͱਂ͍ ຊ୊ 1

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૑քࢁͷܗʹनΘΕͨ ࣦഊஊ ͷ࿩Λ͠·͢ 1

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͋Δػೳ͚ͩΛ෼཭ͨ͠f r Λ࡞Ζ͏ͱͨ͠ ɹɹɹɹɹɹɹɹʘμϒϧ૑քࢁʂʂʗ ɹ ! A .f r ɹɹɹ H .f r 1

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μϒϧ૑քࢁͷಈػ • H Λf r ʹ͢Ε ͹ࠓͷA ͚ͩ͡Όͳ͘ ͯɺ·ͩݟ͵A Ͱ΋࢖ ͑Δ͡ΌΜʁ • H ͸σΧ͍ػೳͳͷͰɺ A ʹೖΕΔͱಉ৺ԁ͕ ࿪Ήͳ… • H ͸A ʹͱͬͯ e l i c ͱͯ͠ ଊ͑ΒΕΔʂ 1

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μϒϧ૑քࢁͷ຤࿏(1) A ͷU Ͱɺ H ͷE ͷঢ়ଶΛ੍ޚͨ͘͠ͳͬͨ …͕ɺ ͍͍ͪͪ࿢·Ͱ߱Γͳ͍ͱ ΍ΓͱΓ͕Ͱ͖ͳͯ͘ਏ͍ 1

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μϒϧ૑քࢁͷ຤࿏(2) ݁ہA ͸࡞Δඞཁ͕ͳ͘ͳ͚ͬͨͲɺ ޙ͔Β౷߹͸ਏ͍ ແҙຯʹ෼͔Εͨf r ͷґଘ؅ཧ͕ େ͖ͳෛ࠴ʹͳͬͨ 1

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C ຊ17ষʹ΋ྨࣅͷΤϐιʔυ͸͋Δ Ϙϒ͓͡͞Μᐌ͘ɺ ΞϓϦ෼ׂͰ͖Δ͜ͱ͋Γ͖Ͱ࡞ͬͯ͠·ͬͨͷ ͕·͔ͣͬͨ ෆཁͳڥք͸σϝϦοτͷ΄͏͕େ͖͍ 2

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Ͳ͏͢Ε͹ྑ͔͔ͬͨ ʮH ge͸σΧ͍ػೳͳͷ ͰɺA p1ʹೖΕΔͱಉ৺ԁ ͕࿪Ήͳ…ʯ ͱ͍͏ࢥߟΛࣺͯΔ 2

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ϦΞϧͳΞϓϦ͸ ຊ౰ʹϚδͰ ૑քࢁʁ 2

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C ຊ ୈ22ষΑΓ 2

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ಉ৺ԁ Ͳ͍ͬͨ͜ 2

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͞Βʹi ΞϓϦ͋Δ͋Δ 2

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i ΞϓϦ΋ͬͱ͋Δ͋Δ 2

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Θ͔Δ͜ͱ • ΞϓϦ͸࿈ๆͰ͋Δ • ࢁ௖͸ͻͱͭͱ͸ݶΒͳ͍ • தෲʹখࢁΛ࡞ͬͯ΋ྑ͍ 2

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ͨͩ͠ɺαʔόͱͷ௨৴͕͋Δ ΫϥΠΞϯτΞϓϦ͸ͲͷΈͪ μϒϧ૑քࢁ ͳΜͰ͢ΑͶ… 2

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q ʮϚΠΫϩαʔϏεͱΫϥΠΞϯτ: ཧ૝ͱݱ࣮ͷڱؒͰʯP https://speakerdeck.com/qsona/ideal-and-reality-of-microservices-from- the-client-side?slide=17 3

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μϒϧ ૑քࢁ 3

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τϦϓϧ ૑քࢁ 3

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ΫΞυϥϓϧ ૑քࢁ 3

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૑ք ࢁ຺ 3

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૑քࢁ຺ͷͭΒΈ ͍͍ͪͪ࿢·Ͱ߱Γͳ͍ͱ ΍ΓͱΓͰ͖ͳͯ͘ਏ͍ ΫϥΠΞϯτΞϓϦͷʮϏδωεϩδο Ϋʯͬͯ΄΅ɺ͍ͭ͜ΒΛͳΜͱ͔ؤுͬͯ ܨ͗߹ΘͤΔ͜ͱͰ͸…ʁ 3

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͋ΔछͷΫϥΠΞϯτΞϓϦ͸ Χϧσϥ1 1 ΧϧσϥɿՐࢁ׆ಈͰͰ͖ͨՐޱͷۼ஍ͷ͜ͱɻѨોࢁͷ΋ͷ͕༗໊ɻ ͳ͓͜Ε͸ʮC ʹ͓͚ΔϦʔυϞσϧʹపͨ͠ঢ়ଶʯͱݴ͍׵͑ͯ΋͍͍ɻ 3

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J ON৭෇͚܎Ͱ͋ Δ͜ͱΛ൱ఆ͠ͳ͍ J ONͷ৭෇͚ͦ͜ ͕೉͍͠ 3

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ΫϥΠΞϯτΞϓϦͷʮυϝΠϯϩδοΫʯ ͸ʮΤϯςΟςΟʹத৺ʯʹ͋Δͱ͸ݶΒͳ ͍ • ཭Εͨը໘Ͱͷσʔλ੔߹ੑΛͲ͏อ͔ͭ • ঢ়ଶมԽʹ଱͑͏ΔಈతͳϏϡʔίϯϙʔωϯτߏ੒ • ෳ਺ͷೖྗ૷ஔʢϢʔβʔೖྗɺσόΠεηϯαɺϓογϡ௨஌ͳͲʣ ΛͲ͏ඇಉظతʹѻ͏͔ ͳͲ͸ɺϢʔβʔͱ௚઀΍ΓͱΓ͢ΔΞϓϦʹ͓͍ͯ͸ཱ೿ͳυϝΠϯ ʢۀ຿ͷؔ৺ʣͱݴ͑ΔͩΖ͏2 2 ʮ௖্ͷؔ৺͸S (S R ), தෲͷؔ৺͸S (S E e )Ͱ͋Δʯͱ͍͏ݴ͍ํ΋Ͱ͖Δɻ 3

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Q. ΫϥΠΞϯτΞϓϦͰ͸ɺΫϦʔϯΞʔΩςΫ νϟͷߟ͑͸ద༻Ͱ͖ͳ͍ͷ͔ʁ A. ͍͍͑ɻ ΫϦʔϯΞʔΩςΫνϟʹ૑քࢁͰ͸ͳ͍ ࢁͷதෲʹখࢁΛ࡞ͬͯ΋͍͍͜ͱ͸ݴٴͨ͠ͱ ͓Γ ෳࡶʹͳΔ৔߹ɺద੾ʹந৅ϨΠϠΛઃ͚Δର৅ 4

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C ຊ ୈ1 ষʮํ਑ͱϨϕϧʯΑΓ ୯७Խ͞Εͨ૑քࢁʹҾ͖ͣΒΕͣɺ ࢥߟఀࢭͤͣʹஸೡʹઃܭ͍͖ͯ͠·͠ΐ͏ ྫͷਤͷઆ໌͸C ຊͷୈ2 ষ͚ͩ Ή͠Ζ࢒Γͷ෦෼͕େࣄʂ 4

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• C ຊ ୈ1 ষʮڥքͷղ๤ֶʯ • σϓϩΠίϯϙʔωϯτ • εϨου • ϩʔΧϧϓϩηε • αʔϏε • C ຊ ୈ2 ষʮ෦෼తͳڥքʯ • ࠷ޙͷεςοϓΛলུ͢Δ • ยํ͚ͩͷڥք • F 4

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֓೦ 4

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࣮ࡍ 4

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ͪͳΈʹ: αʔό૑քࢁ຺ͱͷ۩ମతͳઓ͍ํ • B (B s o F d ) • ΫϥΠΞϯτ͸ϚΠΫϩαʔϏεͷϋϒ • ௨৴ͷू໿ɾϩδοΫͷڞ༗ʹ໾ཱͭ • M F d • Ұ෦͚ͩW Ͱදࣔ͢ΔΑ͏ͳΠϝʔδ • ࢁʹඌ͕ࠜ௨ͬͨʂ ͞·͟·ͳ޻෉ͰɺΞϓϦͷ֎ʹෳࡶੑΛ௥͍΍ Δ͜ͱ͸Ͱ͖Δ ʢͦΕ͕ৗʹਖ਼ղͱ͸ݶΒͳ͍͚Ͳʣ 4

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·ͱΊ • C ͷಉ৺ԁ͸૑քࢁ • ૑քࢁ຺͸ͭΒ͍ • ΫϥΠΞϯτΞϓϦͷࢁ௖͸͠͹͠͹Χϧσϥ • ࢁͷதෲʹ΋ந৅͸͋Δ͜ͱΛ๨ΕΔͳ • ஸೡʹڥքΛҾ͜͏ • ʰຐਆӳ༤఻ϫλϧ ࣣࠢͷཾਆؙʱ͸2 ೥य़ Y ʹͯ഑৴ 4